Battery winding machine

Abstract

The utility model discloses a battery winding machine, which is characterized in that a revolution seat is provided with a convex shaft, a feeding unit is suitable for feeding a second diaphragm, a positive plate, a first diaphragm and a negative plate to a winding needle, and the revolution seat drives two rotation seats to be alternately positioned at a first station and a second station, so that a material plate between the second station and the feeding unit is tensioned by the convex shaft; a glue distributing wheel of the glue distributing unit elastically upwards jacks or downwards leaves away from a winding needle of the second station, and a material sheet between the second station and the convex shaft is pressed by the glue distributing wheel, so that the material sheet of the second station is tightly wound. And the material sheets are tensioned in the station switching process, so that the whole winding process of the roll core is tensioned, and the uniformity of fitting stress in the battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery manufacturing, especially a battery winding machine. BACKGROUND

[0002] The roll core battery is formed by sequentially stacking and winding the second diaphragm, the positive plate, the first diaphragm and the negative plate, wherein the tail end of the negative plate is reserved to be relatively long, so as to be used as the outer layer of the bare battery core (i.e., the conventional setting of the battery negative electrode, the outer layer of the bare battery core is partially exposed to serve as the actual negative electrode of the battery).

[0003] On the other hand, the feeding unit of the battery winding machine comprises a first unwinding device for pulling out the first diaphragm and its related tensioning wheel, a positive electrode feeding mechanism for feeding the positive electrode, a second unwinding device for pulling out the second diaphragm and its related tensioning wheel, and a negative electrode feeding mechanism for feeding the negative electrode. The first diaphragm, the negative electrode, the second diaphragm and the positive electrode are collectively referred to as the material sheet. On the battery winding machine, the material sheet is wound by a certain length at a work station by the rotation seat and the winding needle, and then the rotation seat is adjusted to the second work station through the revolution seat, and then the two diaphragms are cut, and the material sheet is wound at the second work station.

[0004] In the existing battery winding, only the "two rotation seats are arranged on the revolution seat" are considered, so that the two rotation seats are alternately adjusted between the first work station and the second work station. During the adjustment of the material sheet wound by a certain length to the second work station, the first diaphragm and the second diaphragm are kept in tension in the pulled-out state, but the positive electrode and the negative electrode are not tensioned. During the cutting and winding of the subsequent material sheet, the positive electrode and the negative electrode are loose, which causes the existence of gaps in the final roll core battery and uneven adhesion stress. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve at least one of the above-mentioned technical problems, and provides a battery winding machine, which is tensioned during the switching of the material sheet to the second work station, so that the roll core winding is tensioned throughout the process, and the uniformity of the adhesion stress in the battery is improved.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0007] The application discloses a battery winding machine, which comprises a rack, a rotating unit, a feeding unit and a glue spreading unit, the rack is provided with a first station and a second station, the rotating unit comprises a revolution seat rotatably connected with the rack, a convex shaft fixed to the axis of the front end of the revolution seat, two rotation seats rotatably connected with the front end of the revolution seat, an extension cylinder arranged on the rotation seat and a winding needle connected with the piston rod of the extension cylinder, the feeding unit is suitable for feeding material sheets (namely, a second diaphragm, a positive electrode sheet, a first diaphragm and a negative electrode sheet) to the winding needle, the revolution seat is suitable for driving the two rotation seats to be alternately positioned at the first station and the second station, so that the material sheets between the second station and the feeding unit are tensioned through the convex shaft, and the glue spreading unit is suitable for driving a glue spreading wheel to elastically push up or move away from the winding needle of the second station, so that the material sheets between the second station and the convex shaft are pressed by the glue spreading wheel, and the material sheets of the second station are tightly wound.

[0008] Compared with the prior art, the application has the beneficial effects that after the material sheets are wound in the preceding step, the material sheets are tensioned in the conversion station, so that the material sheets of the winding needle of the second station are prevented from being loosened before being pressed by the glue spreading wheel, and the uniformity of the winding core adhesion stress is effectively improved.

[0009] As an improvement of the above technical solution, the first downward pulley and the first upward pulley are connected with corresponding cylinder bodies respectively, the first downward pulley is suitable for pressing down or moving away from the first diaphragm tensioned between the convex shaft and the first unwinding, so that the first diaphragm between the first downward pulley and the convex shaft tends to or moves away from the first station, and the first upward pulley is suitable for pushing up or moving away from the second diaphragm tensioned between the convex shaft and the second unwinding, so that the second diaphragm between the first upward pulley and the convex shaft tends to or moves away from the first station.

[0010] As an improvement of the above technical solution, the feeding unit comprises a positive electrode feeding mechanism, a positive electrode downward pulley, a negative electrode feeding mechanism, a negative electrode downward pulley and a cutting mechanism, and the cutting mechanism is suitable for cutting the first diaphragm and the second diaphragm between the first station and the second station.

[0011] As an improvement of the above technical solution, the two sides of the winding needle are respectively provided with a first adsorption hole and a second adsorption hole, and the two sides of the winding needle are suitable for adsorbing the first diaphragm and the second diaphragm respectively.

[0012] As an improvement of the above technical solution, the positive electrode feeding mechanism and the negative electrode feeding mechanism both comprise a sliding table, a feeding cylinder for driving the sliding table to move, a pressing foot and a pressing sheet cylinder which form a crank slider structure with the sliding table, the sliding table and the pressing foot jointly clamp and feed the electrode sheet, the sliding table is provided with a following pulley, and the diaphragms of the first unwinding and the second unwinding are both extended to the winding needle after winding around the corresponding following pulley.

[0013] As an improvement of the above technical solution, the positive electrode feeding mechanism and the negative electrode feeding mechanism both further comprise a pre-feeding slider, a suction nozzle arranged on the pre-feeding slider and a pre-feeding cylinder for driving the pre-feeding slider to move close to or away from the sliding table.

[0014] As the improvement of the above technical scheme, the rack is provided with a plurality of first fixed pulleys, a first swing frame, a plurality of second fixed pulleys, a second swing frame, a plurality of first swing pulleys are arranged on the first swing frame, a plurality of second swing pulleys are arranged on the second swing frame, the first diaphragm pulled out by the first unwinding is alternately wound around the plurality of first fixed pulleys and the plurality of first swing pulleys, and then wound around the winding needle, and the second diaphragm pulled out by the second unwinding is alternately wound around the plurality of second fixed pulleys and the plurality of second swing pulleys, and then wound around the winding needle.

[0015] As the improvement of the above technical scheme, the convex shaft is provided with a supporting arm, and the supporting arm is suitable for the insertion of the outer end of the winding needle or away from it.

[0016] As the improvement of the above technical scheme, the winding needle comprises a first piece and a second piece, the first piece and the second piece are suitable for clamping the first diaphragm and / or the second diaphragm, the supporting arm is provided with a spherical recess, and the protrusions of the outer ends of the first piece and the second piece define a spherical convex, the spherical convex is suitable for guiding the positioning of the first piece and the second piece to insert the spherical recess, and the first piece and the second piece are clamped.

[0017] As the improvement of the above technical scheme, the rubber coating machine set comprises a first lifting seat, a rubber coating cylinder suitable for driving the first lifting seat to lift, a supporting spring connected to the first lifting seat, a second lifting seat supported by the supporting spring, and a rubber coating wheel and a rubber coating motor provided on the second lifting seat, and the rubber coating motor is suitable for driving the rubber coating wheel to rotate. BRIEF DESCRIPTION OF DRAWINGS

[0018] The specific embodiments of the utility model will be further described in detail below in combination with the drawings, in which:

[0019] Figure 1 It is a structural schematic view of the battery winding machine, the supporting arm of the convex shaft is hidden, and more main structures are shown;

[0020] Figure 2 It is a structural schematic view of the battery winding machine; Figure 1 It is shown that the structure schematic view of the battery winding machine hides the folding mechanism and the rubber coating mechanism;

[0021] Figure 3 It is a structural schematic view of the battery winding machine; Figure 1 It is shown that the folding mechanism structural schematic view of the battery winding machine;

[0022] Figure 4 It is a structural schematic view of the battery winding machine; Figure 1 It is shown that the rubber coating mechanism structural schematic view of the battery winding machine;

[0023] Figure 5 It is a structural schematic view of the battery winding machine; Figure 1 It is shown that the telescopic cylinder and winding needle structure schematic view of the battery winding machine;

[0024] Figure 6 For Figure 1 A convex shaft arm structure diagram of a battery winding machine is shown;

[0025] Figure 7 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 1 ;

[0026] Figure 8 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 2 ;

[0027] Figure 9 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 3 ;

[0028] Figure 10 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 4 ;

[0029] Figure 11 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 5 ;

[0030] Figure 12 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 6 ;

[0031] Figure 13 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 7 ;

[0032] Figure 14 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 8 ;

[0033] Figure 15 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 9 ;

[0034] Figure 16 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 10 ;

[0035] Figure 17 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 10 One;

[0036] Figure 18 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 10 Two;

[0037] Figure 19 For the electrode sheet stacking and winding process of the embodiment of the utility model Figure 10 Three.

[0038] Figure 16 And Figure 17Between, omit the illustration including action thirteen - negative plate end head stack, action fourteen - negative plate end head stack winding, action fifteen - pre-winding, action sixteen - transfer station; Figure 19 After omitting subsequent winding, collection and other action illustration.

[0039] The drawings are only one of the specific embodiments of the utility model, the form and structure of the specific embodiment should not limit the widening of other embodiments.

[0040] Frame 100;

[0041] Revolve seat 210, convex shaft 220, supporting arm 221, spherical concave part 221a, rotate seat 230, telescopic cylinder 240, winding needle 250, first piece strip 251, second piece strip 252, spherical convex 253, adsorption hole 254, positive pole insertion piece port 255, negative pole insertion piece port 256;

[0042] First fixed pulley 311, first swing frame 312, first swing pulley 313, positive pole feeding mechanism 320, second fixed pulley 331, second swing frame 332, second swing pulley 333, negative pole feeding mechanism 340;

[0043] Rubber coating unit 400, first lifting seat 410, rubber coating cylinder 420, supporting spring 430, second lifting seat 440, rubber coating wheel 450, rubber coating motor 460, mounting frame 470;

[0044] Folding mechanism 500, base frame 510, mounting plate 520, folding cylinder 530;

[0045] Negative pole piece 610, first diaphragm 620, positive pole piece 630, second diaphragm 640;

[0046] First descending pulley 710, first ascending pulley 720, positive pole descending pulley 730, negative pole descending pulley 740, gate knife 750, anvil wheel 760. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0048] Referring to Figure 1 、 Figure 2 、 Figures 7 to 19The utility model provides a battery winding machine, including a frame 100, a rotating unit, a feeding unit and a glue spreading unit 400. The frame 100 is provided with a first station and a second station. The rotating unit includes a revolution seat 210 rotatably connected to the frame 100, a convex shaft 220 fixed at the axis center of the front end of the revolution seat 210, two self-rotating seats 230 rotatably connected to the front end of the revolution seat 210, a telescopic cylinder 240 provided on the self-rotating seat 230, and a winding needle 250 connected to the piston rod of the telescopic cylinder 240. The feeding unit is suitable for feeding the winding needle 250 supplies material sheets (i.e., the second diaphragm 640, the positive electrode sheet 630, the first diaphragm 620 and the negative electrode sheet 610), the revolution seat 210 is suitable for driving the two rotation seats 230 to be alternately adjusted to the first station and the second station, so that the material sheet between the second station and the feeding unit is tensioned through the convex shaft 220, and the glue spreading unit 400 is suitable for driving its glue spreading wheel 450 to elastically push up or down away from the winding needle 250 of the second station, and the material sheet between the second station and the convex shaft 220 is pressed by the glue spreading wheel 450, so that the material sheet of the second station is tightly wound.

[0049] It will be understood that "tightly wrapped" refers to the close proximity of the material layers, rather than being loose / spaced apart.

[0050] It can be understood that the first and second workstations are two fixed positions in space and do not change with the rotating seat 230; just like the workstations in the office and the seats in the classroom, they are not bench surfaces that move with the bench.

[0051] Reference Figure 1 、 Figure 2 In the present invention, the rotation characteristics of the rotation base 230 and the revolution base 210 are referred to as rotation and revolution based on the rotation base 230. It can be understood that, in practice, the revolution base 210 uses its own axis as the rotation axis. When the revolution base 210 is calibrated with itself, it is rotation.

[0052] The feeder set further comprises a revolution power mechanism, such as a revolution motor, a driven gear arranged on the revolution base 210, a driving gear arranged on the output shaft of the revolution motor, i.e. the revolution motor drives the revolution base 210 to rotate through the gear train; the revolution motor can also drive the revolution base 210 through a toothed belt and a belt. The feeder set further comprises a rotation power mechanism, such as a rotation motor arranged on the revolution base 210, a gear train / belt train arranged between the rotation motor and the rotation base 230, etc. A brush is arranged between the rack 100 and the revolution base 210, and the rotation motor on the revolution base 210 is electrically connected to the corresponding cable on the rack 100 through the brush, so that the rotation motor is electrically connected to the corresponding motor driver, the central controller, etc. A plurality of first airflow structures are arranged between the rack 100 and the revolution base 210, and a plurality of second airflow structures are arranged between the revolution base 210 and the rotation base 230; the first airflow structure and the second airflow structure both have one end as a hole and the other end as an annular groove, and the hole essentially moves along the annular groove when the revolution base 210 / rotation base 230 rotates, and the hole is always connected to the annular groove. The telescopic cylinder 240 is preferably a pneumatic cylinder, and a follower air pipe is arranged on the rotation base 230, one end of the follower air pipe is communicated with the airflow structure on the rotation base 230, and the other end is communicated with the telescopic cylinder 240, so that the telescopic cylinder 240 is communicated with the corresponding electromagnetic valve on the rack 100 through the corresponding first airflow structure and the corresponding second airflow structure, and the central controller (single-chip microcomputer, PLC, PC, etc.) controls the telescopic cylinder 240 through the electromagnetic valve, so that the winding needle 250 extends out or retracts from the rotation base 230.

[0053] Referring to Figure 1 、 Figure 2 、 Figure 5 It can be understood that the winding needle 250 is not essentially a small strip commonly seen in life; in the utility model, the telescopic cylinder 240 drives the winding needle 250 to protrude out of the rotation base 230, and the winding needle 250 serves as a film holder to hold / fix the end of the two diaphragms, and then rotates with the rotation base 230, so as to wind the second diaphragm 640, the positive plate 630, the first diaphragm 620 and the negative plate 610 into a bare battery core / roll core. The roll core obtained by winding is like being strung by the winding needle 250, and the roll core finally separates from the winding needle 250 to be collected in the corresponding collection tray, so the film holder is called "needle". The winding needle 250 for winding a circular roll core is in a cylindrical shape, and the winding needle 250 for winding a square roll core is in a square shape. Specifically, the winding needle 250 is suitable for fixing the end of the diaphragm in a clamping manner, so the winding needle 250 is composed of two strips, and the two strips are in a cylindrical shape or a square shape as a whole.

[0054] On the other hand, the roll core is composed of the second diaphragm 640, the positive plate 630, the first diaphragm 620 and the negative plate 610, so it can be understood that, referring to Figure 1 、 Figure 2 、 Figures 7 to 19, the feeding unit includes a second unwinder for pulling out the second diaphragm 640 and its related tension pulley, a positive electrode feeding mechanism 320 for feeding the positive electrode sheet 630, a first unwinder for pulling out the first diaphragm 620 and its related tension pulley, and a negative electrode feeding mechanism 340 for feeding the negative electrode sheet 610. The first and second unwinders are respectively connected with corresponding dampers, such as disc brake dampers or disc brake dampers, to avoid the diaphragm from being pulled out by itself, so that the diaphragm between the winder 250 and the unwinder is kept in tension. Specifically, when the winder 250 performs winding, the unwinder is clamped by the damper with a small force, and when the winder 250 stops winding, the unwinder is clamped by the damper with a large force.

[0055] For "when the two rotation seats 230 are alternately adjusted in the first and second stations, the material sheet between the second station and the feeding unit is tensioned by the convex shaft 220", refer to Figures 7 to 10 、 Figures 17 to 19 When the rotation seat 230 is adjusted from the first station to the second station, the first diaphragm 620 between the second station and the first unwinder is tensioned by the convex shaft 220, and the second diaphragm 640 between the second station and the second unwinder is tensioned by the convex shaft 220. The battery winding machine further comprises a first downward pulley 710, a first lifting cylinder adapted to drive the first downward pulley 710 to lift, a first upward pulley 720, and a second lifting cylinder adapted to drive the first upward pulley 720 to lift. The first downward pulley 710 is adapted to press down or move away from the first diaphragm 620 tensioned between the convex shaft 220 and the first unwinder, so that the first diaphragm 620 between the first downward pulley 710 and the convex shaft 220 tends to or moves away from the first station. The first upward pulley 720 is adapted to lift up or move away from the second diaphragm 640 tensioned between the convex shaft 220 and the second unwinder, so that the second diaphragm 640 between the first upward pulley 720 and the convex shaft 220 tends to or moves away from the first station. It can be understood that the downward pulley and the downward pulley are both movable pulleys, and their positions can be changed as needed. When the position is changed, the movable pulley can continue to rotate.

[0056] Refer to Figure 1 、 Figure 2 、 Figures 7 to 19 The battery winding machine further comprises a cutting unit, which is adapted to cut the first diaphragm 620 and the second diaphragm 640 between the first and second stations. As shown in Figure 1 、 Figure 2 The cutting unit adopts a gate cutting mode, and the gate knife 750 and the anvil wheel 760 are respectively connected with corresponding lifting cylinders. The gate knife 750 is engaged with the anvil wheel 760 to cut the diaphragm between the two stations. In some designs, the cutting unit adopts a shearing mode, and the sliding cylinder drives the scissors to approach or move away from the diaphragm. The opening and closing cylinder on the scissors drives the two blades to shear to cut the diaphragm between the two stations.

[0057] An electrode sheet winding method, comprising a step of centering a separator end, a step of winding an electrode sheet end, a step of pre-circulation winding, a step of station conversion, a step of separator retention processing, a step of adhesive tape end positioning, a step of post-circulation winding, and a step of winding core collection.

[0058] Referring to Figures 7 to 12 , the separator end is centered, the first separator 620 pulled out by the first unwinder and the second separator 640 pulled out by the second unwinder are extended to the second station after winding around the convex shaft 220, the first separator 620 between the convex shaft 220 and the first unwinder and the second separator 640 between the convex shaft 220 and the second unwinder are tensioned and away from the first station, and the first separator 620 and the second separator 640 are pre-tensioned; the first descending pulley 710 presses down the first separator 620 between the convex shaft 220 and the first unwinder, so that the first separator 620 tends to the first station, the first separator 620 is re-tensioned, and the winding needle 250 of the first station is easily fixed; the winding needle 250 of the first station is extended outward, the first ascending pulley 720 presses up the second separator 640 between the convex shaft 220 and the second unwinder, so that the second separator 640 tends to the first station, the winding needle 250 of the first station fixes the first separator 620 and the second separator 640, and the cutting machine cuts the two separators between the convex shaft 220 and the first station, and then away from the first station.

[0059] Referring to Figures 13 to 16 , the electrode sheet end is wound, the winding needle 250 of the first station is turned by a certain angle, so that the positive electrode insertion slot 255 is formed between the first separator 620 and the second separator 640, and the base point of the positive electrode insertion slot 255 is substantially the sealing port inside the winding core (the winding core obtained by winding forms the intermediate filling part and the real winding part, and the starting point of the real winding part is the sealing port); the first descending pulley 710 and the first ascending pulley 720 are away from the first station, the positive electrode feeding mechanism 320 sends the end of the positive electrode sheet 630 into the positive electrode insertion slot 255, the winding needle 250 of the first station is turned, so that the end of the positive electrode sheet 630 is clamped by the first separator 620 and the second separator 640, the positive electrode descending pulley 730 presses down the positive electrode sheet 630, and the winding needle 250 of the first station is continuously turned by a certain angle, so that the end of the positive electrode sheet 630 is wound with the separators; when the winding needle 250 of the first station is paused, the negative electrode insertion slot 256 is formed between the first separator 620, the end of the negative electrode sheet 610 is sent into the negative electrode insertion slot 256 by the negative electrode feeding mechanism 340, and the winding needle 250 of the first station is turned, so that the end of the negative electrode sheet 610 is clamped by the first separator 620 and the second separator 640.

[0060] Pre-circulation winding, the negative electrode descending pulley 740 presses down the negative electrode sheet 610, and the winding needle 250 of the first station is continuously turned, so that the second separator 640, the positive electrode sheet 630, the first separator 620 and the negative electrode sheet 610 are wound for a certain length;

[0061] Referring to Figures 16 to 17 the variation, the station conversion, the material sheet of the completed previous winding is turned over to the second station, and the material sheet between the winding needle 250 and the feeding mechanism is tensioned by the convex shaft 220 during the turning over process. Before the rubber-coated roller 450 presses the material sheet, the material sheet has been loosened (there is a gap between the pole piece and the diaphragm).

[0062] Referring to Figures 16 to 19 the variation, the diaphragm storage process, the first diaphragm 620 tensioned between the first downward pulley 710 and the first unwinding is pressed down by the convex shaft 220, and the first diaphragm 620 tends to the first station. The negative electrode sheet 610 tail is adsorbed and turned over by the folding mechanism 500, and the negative electrode sheet 610 tail is turned over upward based on the convex shaft 220 as the base point. The winding needle 250 of the first station is extended outward, the second diaphragm 640 tensioned between the convex shaft 220 and the second unwinding is pressed upward by the first upward pulley 720, and the rubber-coated roller 450 presses the material sheet of the second station. When the diaphragm is cut and loses the tensioning effect of the convex shaft 220, the pressing tensioning of the rubber-coated roller 450 has been prepared. The winding needle 250 of the first station fixes the first diaphragm 620 and the second diaphragm 640, the cutting machine set cuts the two diaphragms between the convex shaft 220 and the first station, and then moves away from the first station.

[0063] The end of the adhesive tape is positioned, the rubber-coated roller 450 is rotated in a direction away from the winding of the material sheet of the second station, so that the end of the adhesive tape on the rubber-coated roller 450 is suitable for sticking to the non-conductive layer substrate part of the negative electrode sheet 610. The rubber-coated roller 450 is rotated and positioned, which not only avoids waste of excessive use of adhesive tape, but also makes the material sheet further tensioned. In some settings, the winding of the non-conductive layer substrate part of the negative electrode sheet 610 has been completed in the previous winding, and the rotation and positioning reference of the rubber-coated roller 450 is that the end of the adhesive tape contacts the material sheet. In some settings, after the previous winding is completed, the negative electrode sheet 610 still has a certain length of the non-conductive layer substrate part unwound, and the rotation and positioning reference of the rubber-coated roller 450 is that the distance between the end of the adhesive tape and the material sheet corresponds to the certain length.

[0064] The subsequent winding, the winding needle 250 of the second station is turned over, the rubber-coated roller 450 is synchronously rotated in the opposite direction of the winding of the winding needle 250, and is elastically jumped to press the material sheet of the second station. The adhesive tape is arranged on the non-conductive layer substrate part of the negative electrode sheet 610, the material sheet is wound into a core, and the non-conductive layer substrate part of the negative electrode sheet 610 wraps the core with adhesive force.

[0065] The core is collected, the collection tray slides to below the second station, the core of the second station is retracted into the self-rotation seat 230, and the core falls into the collection tray based on the stop of the self-rotation seat 230. Preferably, the self-rotation seat 230 is provided with an empty avoidance gap, the winding needle 250 is retracted, and the empty avoidance gap is suitable for the placement of the tab when the self-rotation seat 230 stops the core.

[0066] In the subsequent winding step and the winding core collecting step, one station performs the positive electrode sheet 630 end winding and the negative electrode sheet 610 end winding.

[0067] The pre-circulating winding, the station conversion, the diaphragm retaining process, the adhesive tape end positioning, the subsequent winding and the winding core collection.

[0068] Compared with the prior art, the beneficial effects of the present application include: the material sheet after the pre-winding is tensioned in the conversion station, avoiding the material sheet of the second station winding needle 250 from loosening before being pressed by the rubber coating wheel 450, and effectively improving the winding core adhesion stress uniformity.

[0069] Referring to Figure 5 In some embodiments of the present application, the two sides of the winding needle 250 are respectively provided with first and second suction holes 254, and the first and second suction holes 254 are respectively adapted to suction the first and second diaphragms 620 and 640. It can be understood that the suction holes 254 are connected with a vacuum pump, or a corresponding reversing valve and air source, so that the suction holes 254 can suction or release the diaphragm. In the present application, the suction holes 254 are connected with the corresponding air valves on the rack 100 through the corresponding first and second air flow structures; referring to Figure 5 The winding needle 250 is provided with a joint connected with the suction hole 254, and the joint is adapted to be connected with the air flow structure on the self-rotating seat 230 through a follow-up air pipe. In the diaphragm end center fixing step and the diaphragm retaining process step, the winding needle 250 of one station suctions the first and second diaphragms 620 and 640, the diaphragm is wound in a relatively flat and wrapped winding needle 250 posture, and the diaphragm and the electrode sheet are tightly wound, further improving the winding core adhesion stress uniformity on the basis of the existing industry.

[0070] Referring to Figure 1 , Figure 2 In some embodiments of the present application, the positive electrode feeding mechanism 320 and the negative electrode feeding mechanism 340 both include a sliding table, a feeding cylinder driving the sliding table to move, a presser foot and a sheet pressing cylinder forming a crank slider structure with the sliding table, and the sliding table and the presser foot jointly clamp and feed the electrode sheet. The sliding table is provided with a follow-up pulley, and the diaphragms of the first and second unwinding are extended to the winding needle 250 after winding around the corresponding follow-up pulley; referring to Figures 13 to 16 The diaphragm plane between the follow-up pulley and the winding needle 250 is adapted to be the extension of the sliding table plane.

[0071] Among the diaphragm and the electrode sheet, the diaphragm is unwound and pulled out, and the electrode sheet is an independent unit, and the electrode sheet tension is difficult to improve. Referring to Figures 13 to 16The positive electrode lower sliding pulley 730 presses the positive electrode sheet 630 on the corresponding sliding platform in the winding step, and the negative electrode lower sliding pulley 740 presses the negative electrode sheet 610 on the corresponding sliding platform in the previous winding step, the diaphragm between the sliding platform and the winding needle 250 is a transmission platform corresponding to the electrode sheet, and assists the pressing of the corresponding lower sliding pulley, and improves the tension of the electrode sheet.

[0072] In some embodiments of the utility model, the positive electrode feeding mechanism 320 and the negative electrode feeding mechanism 340 both further include an anticipation sliding block, a suction nozzle arranged on the anticipation sliding block, and an anticipation cylinder for driving the anticipation sliding block to approach or move away from the sliding platform.

[0073] Referring to Figures 10 to 11 In the diaphragm end center fixing step and the diaphragm retaining treatment step, the anticipation sliding block and the suction nozzle thereof prepare the electrode sheet for the sliding platform, so that the electrode sheet partially crosses the sliding platform and extends to the winding needle 250.

[0074] Referring to Figure 1 、 Figure 2 In some embodiments of the utility model, the rack 100 is provided with a plurality of first fixed pulleys 311, a first swing frame 312, a plurality of second fixed pulleys 331, and a second swing frame 332. The first swing frame 312 is provided with a plurality of first swing pulleys 313, and the second swing frame 332 is provided with a plurality of second swing pulleys 333. The first diaphragm 620 pulled out by the first unwinding is alternately wound through the plurality of first fixed pulleys 311 and the plurality of first swing pulleys 313, and then wound to the winding needle 250. The second diaphragm 640 pulled out by the second unwinding is alternately wound through the plurality of second fixed pulleys 331 and the plurality of second swing pulleys 333, and then wound to the winding needle 250, thereby improving the movable tension length of the diaphragm.

[0075] When the first lower sliding pulley 710 presses or releases the first diaphragm 620, and the winding needle 250 is attached to the first diaphragm 620, the first swing frame 312 and the first swing pulley 313 thereof are suitable for driving the swinging first diaphragm 620 to be tensioned. When the first upper sliding pulley 720 presses or releases the second diaphragm 640, and the winding needle 250 is attached to the second diaphragm 640, the second swing frame 332 and the second swing pulley 333 thereof are suitable for driving the swinging second diaphragm 640 to be tensioned. Therefore, when the diaphragm swings, it is dynamically tensioned; the diaphragm is tensioned at all times, effectively ensuring the uniformity of the winding core adhesion stress.

[0076] The battery winding core is generally a thin part, such as 600*1000*8mm, and the winding needle 250 is also thin, such as two sheet strips of 2.5-4mm. Figure 1 、 Figure 6In some embodiments of the present invention, the convex shaft 220 is provided with a supporting arm 221, which is suitable for inserting or moving away from the extended end of the winding needle 250. When the winding needle 250 is extended to insert the supporting arm 221 of the convex shaft 220, the winding needle 250 is extended into place and supported, so that the winding needle 250 has better anti-bending strength, avoids the winding needle 250 from bending, and effectively ensures the winding uniformity / fitting stress uniformity of the winding core. In some settings, the convex shaft 220 is integrally formed with the supporting arm 221, such as integral casting; refer to 1 and Figure 6 The protruding shaft 220 and the supporting arm 221 are detachably connected by screws.

[0077] Reference Figure 5 、 Figures 8 to 16 In some embodiments of the present invention, the winding needle 250 includes a first strip 251 and a second strip 252, and the first strip 251 and the second strip 252 are suitable for clamping the first diaphragm 620 and / or the second diaphragm 640. The support arm 221 is provided with a spherical recess 221a. The protrusions at the outward-extending ends of the first strip 251 and the second strip 252 define a spherical protrusion 253. In the diaphragm end center fixing step and the diaphragm retention processing step, the spherical protrusion 253 is suitable for guiding the first strip 251 and the second strip 252 to position and insert into the spherical recess 221a, and enable the first strip 251 and the second strip 252 to clamp the first diaphragm or the second diaphragm; in addition, the winding needle 250 is separated from the support arm 221 and elastically opened. The diaphragm has a thickness of 0.15-0.8 mm, and the maximum elastic deformation of the first strip 251 and the second strip 252 can be about 0.8 mm; in some settings, a spring is connected between the first strip 251 and the second strip 252.

[0078] The strips are thin parts. Preferably, adsorption holes 254 are set on both sides of the first strip 251 or the second strip 252, which not only reduces the setting of hollow strips, but also facilitates the combination of the winding needle 250 with the clamping ability.

[0079] Reference Figure 1 、 Figure 4 In some embodiments of the present invention, the glue spreading unit 400 includes a first lifting seat 410, a glue spreading cylinder 420 suitable for driving the first lifting seat 410 to rise and fall, a supporting spring 430 connected to the first lifting seat 410, a second lifting seat 440 supported by the supporting spring 430, and a glue spreading wheel 450 and a glue spreading motor 460 provided on the second lifting seat 440. The glue spreading motor 460 is suitable for driving the glue spreading wheel 450 to rotate. The glue spreading cylinder 420 can be directly mounted on the frame 100 or connected to the frame 100 via a mounting bracket 470. The glue spreading cylinder 420 can also be separately connected to a ground bracket; refer to Figure 4 The mounting frame 470 is provided with a slide groove / opening suitable for directional lifting of the first lifting seat 410, and the second lifting seat 440 is connected to the first lifting seat 410 through a guide rod.

[0080] In the diaphragm retaining processing step, the glue applying cylinder 420 drives the first lifting seat 410 and the second lifting seat 440 to ascend, so that the glue applying wheel 450 elastically presses the material sheet of the two-station winding needle 250. In the subsequent winding step, the two-station winding needle 250 winds the material sheet, and the glue applying wheel 450 elastically ascends based on the pushing of the material sheet.

[0081] In some embodiments, the first lifting seat 410 is provided with a vertical rod, and the upper end of the vertical rod is adapted to pull the second lifting seat 440 through a tension spring, so that the glue applying wheel 450 of the second lifting seat 440 elastically presses the winding needle 250 of the two-station.

[0082] In some embodiments, the second lifting seat 440 is provided with a raw glue roller, and the raw glue roller is wound with double-sided adhesive tape. The raw glue roller is adapted to transfer the double-sided adhesive tape to the glue applying wheel 450 during rotation. In some embodiments, the second lifting seat 440 is provided with a glue spraying structure, and the glue spraying structure is adapted to spray a glue layer to the glue applying wheel 450.

[0083] Referring to Figure 1 and Figure 3 , the folding mechanism 500 includes a base frame 510, a mounting plate 520, a folding cylinder 530, and a suction nozzle. The base frame 510 is adapted to be connected to the machine frame 100. The middle part of the mounting plate 520 is hinged to the base frame 510. One end of the mounting plate 520 is provided with the suction nozzle, and the other end is connected to the folding cylinder 530 on the base frame 510, so that the base frame 510, the mounting plate 520, and the folding cylinder 530 define a crank slider structure.

[0084] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Any modification or equivalent replacement without departing from the spirit and scope of the present application shall be covered in the scope of the technical solutions of the present application.

Claims

1. A battery coiling machine characterized by comprising: The utility model provides a kind of winding machine, including: Frame, set one station and two stations; Rotary unit, including rotationally connecting frame's revolution seat, fixed at revolution seat front end axis place's convex axle, rotationally connected in revolution seat front end's two rotation seats, set in rotation seat telescopic cylinder, connect telescopic cylinder piston rod's needle; Feeder unit, suitable for feeding material sheet to needle, revolution seat is suitable for driving two rotation seats alternate positioning in one station and two stations, so that the material sheet between two stations and feeder unit is tensioned by convex axle; Rubber coating machine unit, suitable for driving its rubber coating wheel to be elastically up or away from the needle of two stations, the material sheet between two stations and convex axle is pressed by rubber coating wheel, so that the material sheet of two stations is tightly wound.

2. The battery winder of claim 1, wherein, It further includes first down pulley, first up pulley, first up pulley, first up pulley is respectively connected with corresponding cylinder body, first down pulley is suitable for pressing down or away from the first diaphragm tensioned between convex axle and first unwinding, so that the first diaphragm between first down pulley and convex axle tends to or away from one station, first up pulley is suitable for up or away from the second diaphragm tensioned between convex axle and second unwinding, so that the second diaphragm between first up pulley and convex axle tends to or away from one station.

3. The battery winder of claim 2, wherein, It further includes that feeder unit includes positive electrode feeding mechanism, positive electrode down pulley, negative electrode feeding mechanism, negative electrode down pulley and cutting unit, and cutting unit is suitable for cutting off the first diaphragm and the second diaphragm between one station and two stations.

4. The battery winder of claim 3, wherein, The two sides of the needle are respectively provided with first suction hole and second suction hole, and the two sides of the needle are respectively suitable for sticking the first diaphragm and the second diaphragm.

5. The battery winder of claim 4, wherein, The positive electrode feeding mechanism and the negative electrode feeding mechanism both include slide, feeding cylinder for driving the slide to move, presser foot and sheet pressing cylinder forming a crank slider structure with the slide, the slide and the presser foot jointly clamp and feed the electrode sheet, the slide is provided with a shift pulley, the diaphragm of the first unwinding and the second unwinding is extended to the needle after winding around the corresponding shift pulley.

6. The battery winder of claim 5, wherein, The positive electrode feeding mechanism and the negative electrode feeding mechanism both further include a pre-feed slider, a suction nozzle provided on the pre-feed slider, and a pre-feed cylinder for driving the pre-feed slider to approach or move away from the slide.

7. The battery winder of any one of claims 2 to 6, wherein, The frame is provided with a plurality of first fixed pulleys, a first swing frame, a plurality of second fixed pulleys, a second swing frame, a plurality of first swing pulleys are arranged on the first swing frame, a plurality of second swing pulleys are arranged on the second swing frame, the first diaphragm pulled out by the first unwinding is wound to the needle after alternately winding around the plurality of first fixed pulleys and the plurality of first swing pulleys, and the second diaphragm pulled out by the second unwinding is wound to the needle after alternately winding around the plurality of second fixed pulleys and the plurality of second swing pulleys.

8. The battery winder of any one of claims 2 to 6, wherein, The convex axle is provided with a supporting arm, and the supporting arm is suitable for the outer end of the needle to be inserted or moved away.

9. The battery winder of claim 8, wherein, The needle includes a first strip and a second strip, the first strip and the second strip are suitable for clamping the first diaphragm and / or the second diaphragm, the supporting arm is provided with a spherical recess, and the protrusions of the outer ends of the first strip and the second strip define a spherical protrusion, the spherical protrusion is suitable for guiding the first strip and the second strip to be positioned and inserted into the spherical recess, and the first strip and the second strip are clamped.

10. The battery winder of any one of claims 2 to 6, wherein, The glue spreading machine set comprises a first lifting seat, a glue spreading cylinder adapted to drive the first lifting seat to lift, a supporting spring connected to the first lifting seat, a second lifting seat supported by the supporting spring, and a glue spreading wheel and a glue spreading motor arranged on the second lifting seat, the glue spreading motor being adapted to drive the glue spreading wheel to rotate.

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