An electrode assembly for a lithium secondary battery

Abstract

The application belongs to the technical field of batteries, and discloses a battery cell winding device, which comprises a rack, a rotating main body, two winding needle modules, a driving module, a separator passing roller and a flying cutting module. The rotating main body is rotatably installed on the rack. Each winding needle module is installed on the rotating main body. Each winding needle module comprises a winding needle driving assembly and a winding needle assembly. The winding needle driving assembly is used for driving the rotation of the winding needle assembly and the axial movement of the winding needle assembly. The driving module is connected with the rotating main body to drive the rotation of the rotating main body. The separator passing roller is installed on the rack. The flying cutting module comprises a cutter assembly and a cutter driving assembly. The cutter driving assembly is used for driving the cutter assembly to move towards the direction close to or away from the winding needle module and can drive the rotation of the cutter assembly. The battery cell winding device does not need to stop the transportation of the separator when cutting the separator, can realize the movement cutting, reduces the invalid working time of the battery cell winding device, and is beneficial to improving the working efficiency of the battery cell winding device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a winding device for battery cell. BACKGROUND

[0002] The existing winding device for battery cell usually comprises two winding needle assemblies, in the actual working process, one of the two winding needle assemblies is located at the winding position, and the other is located at the discharging position, the switching of the winding needle assembly at the winding position and the winding needle assembly at the discharging position is needed when the winding of the battery cell is close to completion, in the switching process, the diaphragm on the winding needle assembly at the discharging position needs to be cut off, and the diaphragm needs to be wound on the winding needle assembly at the winding position, and before the diaphragm is cut off, the transportation of the diaphragm needs to be stopped, the logic action consumes time, and the working efficiency of the winding device for battery cell is reduced. SUMMARY

[0003] The present application aims to provide a winding device for battery cell, which can realize the cutting without stopping the transportation of the diaphragm, can realize the cutting in motion, reduces the invalid working time of the winding device for battery cell, and is beneficial to improving the working efficiency of the winding device for battery cell.

[0004] To achieve this purpose, the present application adopts the following technical scheme:

[0005] The present application discloses a winding device for battery cell, comprising: a rack; a rotating main body, which is rotatably installed on the rack; two winding needle modules, each of which is installed on the rotating main body, each of the winding needle modules comprises a winding needle driving assembly and a winding needle assembly, the winding needle driving assembly is used for driving the winding needle assembly to rotate and the axial movement of the winding needle assembly; a driving module, which is installed on the rack and connected with the rotating main body to drive the rotating main body to rotate; a diaphragm passing roller, which is installed on the rack; a cutting module, which is installed on the rack, the cutting module comprises a cutting knife assembly and a cutting knife driving assembly, the cutting knife driving assembly is used for driving the cutting knife assembly to move towards the direction close to or away from the winding needle module, and can drive the cutting knife assembly to rotate; wherein: the diaphragm is abutted on the diaphragm passing roller and connected with one of the winding needle modules, in the process of cutting the diaphragm, the driving module drives the rotating main body to rotate, so that the other winding needle module is abutted on the diaphragm, and the cutting knife assembly has the same angular velocity and rotation center as the winding needle module abutted on the diaphragm when moving towards the direction close to the diaphragm.

[0006] In some embodiments, the cutter driving assembly comprises: a first linear driving unit, the first linear driving unit comprising a first driving source and a linear transmission structure, a power input end of the linear transmission structure being connected with an output shaft of the first driving source, and a power output end of the linear transmission structure being connected with the cutter assembly; and a first rotary driving unit, the first rotary driving unit comprising a second driving source and a rotary transmission structure, a power input end of the rotary transmission structure being connected with an output shaft of the second driving source, and a power output end of the rotary transmission structure being connected with the first linear driving unit.

[0007] In some specific embodiments, the power input end of the rotary transmission structure comprises a driving gear, the power output end of the rotary transmission structure comprises an arc-shaped rack, the arc-shaped rack is engaged with the driving gear, the driving gear is connected with the output shaft of the second driving source, and the arc-shaped rack is connected with the first linear driving unit through a rack mounting plate.

[0008] In some more specific embodiments, the first rotary driving unit further comprises: a driving fixed plate for mounting the second driving source; an arc-shaped guide rail and an arc-shaped sliding block, the arc-shaped sliding block being fitted in the arc-shaped guide rail, one of the arc-shaped guide rail and the arc-shaped sliding block being connected with the driving fixed plate, and the other of the arc-shaped guide rail and the arc-shaped sliding block being connected with the rack mounting plate.

[0009] In some embodiments, the cutter assembly comprises: a cutter fixed seat connected with the cutter driving assembly; a floating pressing head slidably mounted on the cutter fixed seat, the floating pressing head having pressing roller bodies abutting against the diaphragm, the pressing roller bodies being arranged in pairs; a first elastic member having one end abutting against the cutter fixed seat and the other end abutting against the floating pressing head; and a cutter body fixedly connected to the cutter fixed seat and located between the pressing roller bodies arranged in pairs; wherein the pressing roller bodies contact the diaphragm prior to the cutter body when the cutter driving assembly drives the cutter assembly to move.

[0010] In some specific embodiments, the floating pressing head further comprises: a pressing roller connecting seat; a sliding shaft having one end connected with the pressing roller connecting seat and the other end penetrating through the cutter fixed seat, and the first elastic member being sleeved on the sliding shaft; and pressing roller connecting shafts arranged in pairs and connected with two side walls of the pressing roller connecting seat respectively, the two ends of the pressing roller bodies being rotatably connected with the pressing roller connecting shafts arranged in pairs.

[0011] In some embodiments, the cutter assembly further comprises a cutter connecting plate, one end of the cutter connecting plate being connected with the cutter fixing seat and the other end being connected with the cutter body; an auxiliary pressing head, the auxiliary pressing head being slidably mounted on the cutter connecting plate in a direction perpendicular to the sliding direction of the floating pressing head, the auxiliary pressing head having a plurality of auxiliary pressing rollers abutting against the diaphragm; and a second elastic member, one end of the second elastic member abutting against the cutter connecting plate and the other end abutting against the auxiliary pressing head.

[0012] In some specific embodiments, the auxiliary pressing head comprises a floating plate, the floating plate having a plurality of mounting grooves, each of the mounting grooves being provided with a rotatable auxiliary pressing roller; and a floating shaft, one end of the floating shaft being connected with the floating plate and the other end being provided through the cutter connecting plate, and the second elastic member being sleeved on the floating shaft.

[0013] In some embodiments, the rotating body is provided with a positioning member; and the battery cell winding device further comprises a positioning module, the positioning module being mounted on the rack, the positioning module having a positioning position for positioning the positioning member and a release position for releasing the positioning member, and the rotating body being fixed relative to the rack when the positioning module positions the positioning member.

[0014] In some embodiments, the battery cell winding device further comprises a lock-jaw module, the lock-jaw module being mounted on the rotating body, the lock-jaw module having a pressing state for pressing the winding needle assembly and a disengaging state for disengaging the winding needle assembly, and the winding needle assembly being fixed relative to the winding needle assembly when the lock-jaw module is in the pressing state.

[0015] The battery cell winding device has the following advantages: the cutter assembly of the battery cell winding device can rotate at the same angular velocity and around the same rotation center as the winding needle assembly under the driving of the cutter driving assembly, the diaphragm, the cutter assembly and the winding needle assembly all remain relatively stationary in the transportation direction of the diaphragm during the cutting of the diaphragm by the cutter assembly, the movement component of the cutter assembly in the radial direction of the winding needle assembly can serve as the cutting force of the diaphragm, the function of cutting the diaphragm while moving is realized, the invalid working time of the battery cell winding device is reduced, and the working efficiency of the battery cell winding device is improved.

[0016] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the battery cell winding device according to an embodiment of the application;

[0018] Figure 2is another direction structure schematic view of the battery cell winding device of the embodiment of the present application;

[0019] Figure 3 is structure schematic view of the battery cell winding device of the embodiment of the present application when carrying out winding process;

[0020] Figure 4 is structure schematic view of the battery cell winding device of the embodiment of the present application when preparing to cut the separator membrane;

[0021] Figure 5 is structure schematic view of the battery cell winding device of the embodiment of the present application when the cutting knife assembly stops to the separator membrane;

[0022] Figure 6 is structure schematic view of the battery cell winding device of the embodiment of the present application when the cutting knife assembly cuts the separator membrane;

[0023] Figure 7 is structure schematic view of the battery cell winding device of the embodiment of the present application when the cutting knife assembly presses the separator membrane;

[0024] Figure 8 is structure schematic view of the battery cell winding device of the embodiment of the present application when the cutting of the separator membrane is completed and the separator membrane is wound on the winding needle assembly;

[0025] Figure 9 is structure schematic view of the fly cutting module of the embodiment of the present application;

[0026] Figure 10 is structure schematic view of the cutting knife assembly of the embodiment of the present application;

[0027] Figure 11 is another direction structure schematic view of the cutting knife assembly of the embodiment of the present application;

[0028] Figure 12 is cooperation structure schematic view of the rotating main body and the driving module and the rack of the embodiment of the present application;

[0029] Figure 13 is another direction structure schematic view of the fly cutting module of the embodiment of the present application; Figure 12

[0030] is another direction structure schematic view of the fly cutting module of the embodiment of the present application; Figure 14

[0031] is A-A direction sectional view of the fly cutting module of the embodiment of the present application; Figure 15

[0032] is A-A direction sectional view of the fly cutting module of the embodiment of the present application; Figure 16 Figure 15

[0033] Figure 17 ​​is a structural schematic view of a locking mouth module of an embodiment of the present application;

[0034] Figure 18 is a structural schematic view of a positioning module of an embodiment of the present application.

[0035] Reference signs:

[0036] 100, rack; 110, support panel; 120, first support seat; 130, support connecting seat; 140, first bearing; 150, first bearing fixing plate; 160, second support seat; 170, second bearing; 180, second bearing fixing plate;

[0037] 200, rotating main body; 210, rotating disc; 220, rotating shaft; 230, limiting rod; 231, positioning piece;

[0038] 300, needle winding module; 310, needle winding driving assembly; 311, second linear driving unit; 3111, first driving piece; 3112, first fixing seat; 3113, second fixing seat; 3114, lead screw; 3115, sliding seat; 3116, shaft coupling; 3117, first sliding rail; 3118, first sliding block; 312, second rotary driving unit; 3121, second driving piece; 3122, needle winding mounting seat; 3123, third bearing; 3124, bearing fixing nut; 3125, first speed reducer; 3126, first speed reduction mounting plate; 320, needle winding assembly; 321, needle winding shaft; 322, needle body; 301, first needle winding assembly; 302, second needle winding assembly;

[0039] 400, driving module; 410, third driving piece; 420, belt driving assembly; 421, driving wheel; 422, driven wheel; 423, transmission belt; 430, slip ring mounting seat; 440, slip ring body; 450, second speed reducer; 460, second speed reduction mounting plate;

[0040] 500, fly cutting module; 510, cutter assembly; 511, cutter fixing seat; 512, floating pressure head; 5121, pressure roller body; 5122, pressure roller connecting seat; 5123, sliding shaft; 5124, pressure roller connecting shaft; 5125, pressure roller bearing; 513, first elastic member; 514, cutter body; 515, cutter connecting plate; 516, auxiliary pressure head; 5161, auxiliary pressure roller; 5162, floating plate; 5163, floating shaft; 517, linear bearing; 518, cutter fixing block; 520, cutter driving assembly; 521, first linear driving unit; 5211, first driving source; 5212, first screw rod fixing seat; 5213, first screw rod body; 5214, first screw rod nut; 522, first rotary driving unit; 5221, second driving source; 5222, driving gear; 5223, arc-shaped rack; 5224, rack mounting plate; 5225, driving fixing plate; 5226, arc-shaped guide rail; 5227, arc-shaped sliding block;

[0041] 600, diaphragm passing roller;

[0042] 700, positioning module; 710, positioning mounting seat; 720, positioning driving member; 730, positioning plate; 731, positioning groove; 740, floating joint; 750, second sliding rail; 760, second sliding block; 770, driving mounting plate; 780, sliding rail fixing plate; 790, positioning adapter plate;

[0043] 800, lock mouth module; 810, lock mouth driving member; 820, lock mouth connecting seat; 830, lock mouth body; 840, second screw rod fixing seat; 850, second screw rod body; 860, second screw rod nut; 870, bearing outer fixing ring; 880, bearing inner fixing ring; 890, fourth bearing;

[0044] 10, diaphragm. DETAILED DESCRIPTION

[0045] The application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are intended to be illustrative only and are not in any way limiting of the application. In addition, it should be noted that the drawings only show the parts relevant to the application and not all the parts.

[0046] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0048] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] The present application discloses an electric core winding device, referring to Figures 1-3 As shown in the figure, the electric core winding device comprises a rack 100, a rotating main body 200, two winding needle modules 300, a driving module 400, a diaphragm passing roller 600 and a flying cutting module 500. The rotating main body 200 is rotatably installed on the rack 100. Each winding needle module 300 is installed on the rotating main body 200. Each winding needle module 300 comprises a winding needle driving assembly 310 and a winding needle assembly 320. The winding needle driving assembly 310 is used to drive the winding needle assembly 320 to rotate and axially move. The driving module 400 is installed on the rack 100 and connected with the rotating main body 200 to drive the rotating main body 200 to rotate. The diaphragm passing roller 600 is installed on the rack 100. The flying cutting module 500 is installed on the rack 100. The flying cutting module 500 comprises a cutter assembly 510 and a cutter driving assembly 520. The cutter driving assembly 520 is used to drive the cutter assembly 510 to move towards the direction of approaching or moving away from the winding needle module 300 and to drive the cutter assembly 510 to rotate. The diaphragm 10 is abutted against the diaphragm passing roller 600 and connected with one winding needle module 300. In the process of cutting off the diaphragm 10, the driving module 400 drives the rotating main body 200 to rotate, so that the other winding needle module 300 is abutted against the diaphragm 10. When the cutter assembly 510 moves towards the direction of approaching the diaphragm 10, the winding needle module 300 abutted against the diaphragm 10 has the same angular velocity.

[0050] First of all, it needs to be pointed out that, in order to facilitate the description of the specific working process of the electric core winding device of the present embodiment when cutting off the diaphragm 10, referring to Figures 3-8As shown, the first time the pin assembly 320 clamps the diaphragm 10 is called the first pin assembly 301 (the pin assembly 320 to be switched to the unwinding position), and the pin assembly 320 that stops the diaphragm 10 when cutting the diaphragm 10 becomes the second pin assembly 302 (the pin assembly 320 to be switched to the winding position). In the actual working process, first, as shown in Figure 3 As shown, the rotating body 200 rotates counterclockwise under the drive of the drive module 400, so that the first pin assembly 301 moves towards the unwinding position, the second pin assembly 302 moves towards the winding position, and the second pin assembly 302 rotates clockwise at a fixed angular velocity ω under the drive of the pin drive assembly 310, at the same time, the cutter assembly 510 also rotates clockwise at the angular velocity ω under the drive of the cutter drive assembly 520, and moves towards the direction close to the diaphragm 10; the rotation center of the cutter assembly 510 coincides with the rotation center of the second pin assembly 302, when the second pin assembly 302 moves to stop on the diaphragm 10 (as shown in Figure 4 ), the linear velocity of the diaphragm 10 transportation at this time is equal to the linear velocity of the outer peripheral wall of the second pin assembly 302; when the cutter assembly 510 stops on the diaphragm 10 under the drive of the cutter drive assembly 520 (as shown in Figure 5 ), the angular velocity of the cutter assembly 510 is equal to the angular velocity of the second pin assembly 302, and the linear velocity of the diaphragm 10 transportation is equal to the linear velocity of the outer peripheral wall of the second pin assembly 302, in this state, the diaphragm 10 is compressed between the cutter assembly 510 and the second pin assembly 302, and the diaphragm 10, the cutter assembly 510 and the pin assembly 320 all remain relatively static in the transportation direction of the diaphragm 10; since the cutter assembly 510 is always moving and rotating synchronously under the drive of the cutter drive assembly 520, the movement component of the cutter assembly 510 along the radial direction of the second pin assembly 302 can cut the diaphragm 10 (as shown in Figure 6 ), thereby realizing that the diaphragm 10 does not need to be stopped for cutting, and the cell roll on the first pin assembly 301 can be driven away under the action of the unwinding mechanical arm or manually after cutting is completed; and the broken end of the diaphragm 10 can press the diaphragm 10 tightly in the second pin assembly 302 under the action of the diaphragm pressing plate inside the second pin assembly 302 (as shown in Figure 7 ), the second pin assembly 302 continues to rotate under the drive of its pin drive assembly 310, and the diaphragm 10 can be continuously wound onto the second pin assembly 302, at this time the cutter assembly 510 returns to the original position under the drive of the cutter drive assembly 520, completing a diaphragm 10 cutting process (as shown in Figure 8 ).

[0051] In summary, since the cutter assembly 510 of the present embodiment can rotate at the same angular velocity as the needle assembly 320 under the driving of the cutter driving assembly 520, during the cutting of the separator 10 by the cutter assembly 510, the separator 10, the cutter assembly 510, and the needle assembly 320 all remain relatively stationary in the transport direction of the separator 10, and the movement component of the cutter assembly 510 in the radial direction of the needle assembly 320 can serve as the cutting force for cutting the separator 10, thereby realizing the function of cutting the separator 10 while moving, reducing the invalid working time of the battery cell winding device, and facilitating the improvement of the working efficiency of the battery cell winding device.

[0052] Referring to Figure 1 and Figure 2 As shown in the figures, the battery cell winding device further comprises a locking nozzle module 800 and a positioning module 700. The locking nozzle module 800 is mounted on the rotating shaft 220. The locking nozzle module 800 has a pressing state for pressing the needle assembly 320 and a disengaging state for disengaging from the needle assembly 320. When the locking nozzle module 800 is in the pressing state, the battery cell winding on the needle assembly 320 is fixed relative to the needle assembly 320. The battery cell winding device further comprises a positioning module 700. The positioning module 700 is mounted on the rack 100. The positioning module 700 has a positioning position for positioning the positioning member 231 and a release position for releasing the positioning member 231. When the positioning module 700 positions the positioning member 231, the rotating body 200 is fixed relative to the rack 100. It can be understood that during winding, if the battery cell winding moves axially relative to the needle assembly 320, it will affect the winding yield. In the present embodiment, the added locking nozzle module 800 can fix the battery cell winding on the needle assembly 320 during actual work, avoiding axial movement of the battery cell winding, thereby ensuring winding stability. During winding and unloading, the rotating body 200 needs to be fixed relative to the rack 100. If the rotating body 200 rotates when the needle assembly 320 rotates under the driving of the needle driving assembly 310, it will cause a work failure. In the present embodiment, the added positioning module 700 can position the rotating body 200, so that the rotating body 200 is fixed relative to the rack 100 when the needle assembly 320 rotates under the driving of the needle driving assembly 310, thereby reducing the probability of work failure and improving the working reliability of the battery cell winding device.

[0053] Referring to Figure 9As shown, the cutter driving assembly 520 comprises a first linear driving unit 521 and a first rotary driving unit 522. The first linear driving unit 521 comprises a first driving source 5211 and a linear transmission structure. The power input end of the linear transmission structure is connected with the output shaft of the first driving source 5211, and the power output end of the linear transmission structure is connected with the cutter assembly 510. The first rotary driving unit 522 comprises a second driving source 5221 and a rotary transmission structure. The power input end of the rotary transmission structure is connected with the output shaft of the second driving source 5221, and the power output end of the rotary transmission structure is connected with the first linear driving unit 521. It can be understood that, in actual working process, the first linear driving unit 521 is split to realize the movement of the cutter assembly 510 towards the direction close to the diaphragm 10, and the first rotary driving unit 522 is used to realize the synchronous rotation of the cutter assembly 510 and the needle assembly 320, which can simplify the control of the movement instruction of the cutter assembly 510, thereby being conducive to reducing the manufacturing cost of the cutter driving assembly 520.

[0054] Optionally, the power input end of the rotary transmission structure comprises a driving gear 5222, the power output end of the rotary transmission structure comprises an arc-shaped rack 5223, the arc-shaped rack 5223 is engaged with the driving gear 5222, the driving gear 5222 is connected with the output shaft of the second driving source 5221, and the arc-shaped rack 5223 is connected with the first linear driving unit 521 through a rack mounting plate 5224. It can be understood that the second driving source 5221 is a servo motor, the driving gear 5222 is driven by the servo motor to drive the arc-shaped rack 5223, which can simplify the structure of the first rotary driving unit 522 and is conducive to controlling the rotary angular velocity of the first linear driving unit 521, thereby ensuring that the cutter assembly 510 and the needle assembly 320 rotate at the same angular velocity during the cutting of the diaphragm 10. At the same time, the rack mounting plate 5224 can increase the connection area of the arc-shaped rack 5223 and the first linear driving unit 521, ensure that the arc-shaped rack 5223 is stably mounted on the first linear driving unit 521, and thereby ensure that the arc-shaped rack 5223 stably drives the first linear driving unit 521 to rotate.

[0055] Further, the first rotating driving unit 522 further comprises a driving fixed plate 5225, an arc-shaped guide rail 5226 and an arc-shaped sliding block 5227. The driving fixed plate 5225 is used for mounting the second driving source 5221. The arc-shaped sliding block 5227 is matched with the arc-shaped guide rail 5226. The arc-shaped guide rail 5226 is connected to the driving fixed plate 5225. The arc-shaped sliding block 5227 is connected to the rack mounting plate 5224. It can be understood that the driving fixed plate 5225 is connected to the rack 100 and is used for fixing the second driving source 5221, which can ensure the mounting stability of the second driving source 5221. In the process of the rack mounting plate 5224 following the rotation of the arc-shaped rack 5223, the movement of the arc-shaped sliding block 5227 on the arc-shaped guide rail 5226 can limit the rotation direction of the rack mounting plate 5224, avoiding the phenomenon of the rack mounting plate 5224 being stuck, so that the rack mounting plate 5224 can stably drive the first linear driving unit 521 to rotate.

[0056] Optionally, the linear transmission structure comprises a first screw rod fixed seat 5212 connected to the housing of the first driving source 5211. Both ends of the first screw rod body 5213 are rotatably mounted to the first screw rod fixed seat 5212, and one end penetrates through the first screw rod fixed seat 5212 and is connected with the output shaft of the first driving source 5211. The first screw rod nut 5214 is threadedly connected to the first screw rod body 5213 and is connected with the cutter assembly 510. It can be understood that in the actual working process, the first driving source 5211 drives the first screw rod body 5213 to rotate. Both ends of the first screw rod body 5213 are rotatably connected to the first screw rod fixed seat 5212, which can ensure that the first screw rod body 5213 stably rotates under the driving of the first driving source 5211. The first screw rod body 5213 is matched with the first screw rod nut 5214. In the process of the first screw rod body 5213 rotating, the first screw rod nut 5214 can drive the cutter assembly 510 to move along the axial direction of the first screw rod body 5213, thereby driving the cutter assembly 510 to cut off the diaphragm 10. The screw nut pair composed of the first screw rod nut 5214 and the first screw rod body 5213 has good movement precision and is convenient to control, thereby ensuring the stable and accurate compression and relaxation of the needle assembly 320. It should be noted that in other embodiments of the present application, the first driving source 5211 can also directly drive the gear 5222 and the rack of other structures, and is not limited to the driving structure described above.

[0057] It should be noted that in other embodiments of the present application, the cutter driving assembly 520 can be directly formed as a six-axis mechanical arm. In the actual movement process, the same driving function as the first rotating driving unit 522 and the first linear driving unit 521 is realized by controlling the pose of the end of the six-axis mechanical arm.

[0058] Reference Figure 10 and Figure 11 As shown in FIG. 12, the cutter assembly 510 comprises a cutter fixing seat 511 connected with the first screw nut 5214, a floating pressure head 512 slidably installed on the cutter fixing seat 511, the floating pressure head 512 having a pressure roller body 5121 abutting against the diaphragm 10, a first elastic member 513 having one end abutting against the cutter fixing seat 511 and the other end abutting against the floating pressure head 512, and a cutter body 514 fixedly connected to the cutter fixing seat 511 and located between the pair of pressure roller bodies 5121. It can be understood that, in the process of driving the cutter fixing seat 511 to move towards the diaphragm 10 by the first linear driving unit 521, the two pressure roller bodies 5121 on the floating pressure head 512 first contact the diaphragm 10 to press the diaphragm 10, and at this time the cutter body 514 does not contact the diaphragm 10; when the first linear driving unit 521 continues to drive the cutter fixing seat 511 to move, the first elastic member 513 is compressed because the pressure roller body 5121 has abutted against the roller assembly 320, and the cutter body 514 extends out of the two pressure roller bodies 5121 to cut the diaphragm 10. This cutting method of first pressing the diaphragm 10 by the pressure roller body 5121 and then cutting the diaphragm 10 by the cutter body 514 can make the end face of the diaphragm 10 more uniform, thereby improving the cutting quality.

[0059] Optionally, the floating pressure head 512 comprises a pressure roller connecting seat 5122, a sliding shaft 5123, and a pair of pressure roller connecting shafts 5124, one end of the sliding shaft 5123 is connected with the pressure roller connecting seat 5122, the other end of the sliding shaft 5123 penetrates through the cutter fixing seat 511, and the first elastic member 513 is sleeved on the sliding shaft 5123, the pair of pressure roller connecting shafts 5124 are connected to the two opposite side walls of the pressure roller connecting seat 5122, respectively, and the two ends of the pressure roller body 5121 are rotatably connected to the pair of pressure roller connecting shafts 5124. It can be understood that, by supporting the pressure roller body 5121 by the pair of pressure roller connecting shafts 5124, it can be ensured that the pressure roller body 5121 rotates around the pressure roller connecting shaft 5124 during the transportation of the diaphragm 10, thereby avoiding the influence of the pressure roller body 5121 on the normal transportation of the diaphragm 10. The added sliding shaft 5123 can guide the movement direction of the pressure roller connecting seat 5122, thereby avoiding the phenomenon of the floating pressure head 512 being stuck, and can support the first elastic member 513, thereby avoiding the bending of the first elastic member 513.

[0060] Further, the pressure roller connecting shaft 5124 is provided with a pressure roller bearing 5125, and the outer ring of the pressure roller bearing 5125 abuts against the pressure roller body 5121. In this way, the friction between the pressure roller body 5121 and the pressure roller connecting shaft 5124 can be reduced, so that the pressure roller body 5121 can rotate more easily, and the normal transportation of the diaphragm 10 is not affected.

[0061] Further, the cutter fixing seat 511 is provided with a linear bearing 517, and the sliding shaft 5123 penetrates through the linear bearing 517. The linear bearing 517 can limit the sliding direction of the sliding shaft 5123, so that the floating pressure head 512 is not stuck relative to the pressure roller connecting seat 5122, and the friction between the sliding shaft 5123 and the cutter fixing seat 511 can be reduced, so that the service life of the sliding shaft 5123 is prolonged. It should be noted that the number of the sliding shaft 5123 can be two, three or more according to actual needs. Figure 10 and Figure 11 The number of the sliding shaft 5123 can be two, three or more according to actual needs.

[0062] Optionally, the cutter assembly 510 further comprises a cutter connecting plate 515, an auxiliary pressure head 516 and a second elastic member. One end of the cutter connecting plate 515 is connected with the cutter fixing seat 511, and the other end is connected with the cutter body 514 through a cutter fixing block 518. The auxiliary pressure head 516 is slidably installed on the cutter connecting plate 515 in a direction perpendicular to the sliding direction of the floating pressure head 512. The auxiliary pressure head 516 has a plurality of auxiliary pressure rollers 5161 abutting against the diaphragm 10. One end of the second elastic member abuts against the cutter connecting plate 515, and the other end abuts against the auxiliary pressure head 516. It can be understood that during the cutting of the diaphragm 10 by the cutter body 514, the auxiliary pressure rollers 5161 of the auxiliary pressure head 516 abut against the diaphragm 10. Due to the existence of the second elastic member, the auxiliary pressure head 516 can float in the transportation direction of the diaphragm 10 during the transportation of the diaphragm 10, so that the diaphragm 10 can be cut by the cutter body 514, and the flatness of the cut surface of the diaphragm 10 can be improved.

[0063] Optionally, the auxiliary pressure head 516 comprises a floating plate 5162 and a floating shaft 5163, one end of the floating plate 5162 is provided with a plurality of mounting grooves, one rotatable auxiliary pressure roller 5161 is arranged in each mounting groove, one end of the floating shaft 5163 is connected to the floating plate 5162, the other end of the floating shaft 5163 is arranged in the cutter connecting plate 515, and the second elastic member is sleeved on the floating shaft 5163. It can be understood that the added floating plate 5162 can make the diaphragm 10 be stopped by a plurality of auxiliary pressure rollers 5161 when the diaphragm 10 is cut, facilitate the cutter body 514 to cut the diaphragm 10, and be beneficial to improving the flatness of the diaphragm 10 cutting surface. The added floating shaft 5163 can limit the movement direction of the floating plate 5162 on the one hand, avoid the phenomenon that the auxiliary pressure head 516 is stuck, and on the other hand can support the second elastic member, avoiding the second elastic member bending.

[0064] Further optionally, the cutter connecting plate 515 is provided with an oil-free bushing, and the floating shaft 5163 is arranged in the oil-free bushing. The added oil-free bushing can limit the sliding direction of the floating shaft 5163 on the one hand, avoid the phenomenon that the floating pressure head 512 is stuck relative to the pressure roller connecting seat 5122, and on the other hand can reduce the friction between the floating shaft 5163 and the cutter connecting plate 515, thereby prolonging the service life of the floating shaft 5163. It needs to be supplemented that in the embodiment of the application, the number of floating shafts 5163 can be selected according to actual needs.

[0065] Reference Figure 12 and Figure 13As shown, the rotating body 200 comprises a rotating shaft 220, a rotating disc 210 and two limiting rods 230, one end of the rotating shaft 220 is rotatably connected to the rack 100 through the rotating disc 210. One end of the limiting rod 230 is connected to the rotating disc 210, and the other end is provided with a positioning piece 231 cooperating with the positioning module 700. The rack 100 comprises a support panel 110, a first support seat 120, a second support seat 160 and a support connecting seat 130. The support panel 110 is provided with a mounting hole cooperating with the rotating disc 210, the first support seat 120 is arranged in a spaced manner with the support panel 110, the first support seat 120 is provided with a first rotating hole cooperating with the rotating shaft 220, the first bearing 140 is installed in the first rotating hole, one end of the support connecting seat 130 is connected to the support panel 110, and the other end is connected to the first support seat 120, the second support seat 160 is arranged in a spaced manner with the support connecting seat 130, the second support seat 160 and the support connecting seat 130 are respectively located on both sides of the support panel 110, the second support seat 160 is provided with a second rotating hole cooperating with the rotating shaft 220, the second bearing 170 is installed in the second rotating hole; and the second support seat 160 is used for installing the driving module 400. It can be understood that the mounting hole for cooperating with the rotating disc 210 of the support panel 110, in the process of driving the entire rotating body 200 to rotate by the driving module 400, the rotating wheel on the rotating disc 210 can rotate on the inner wall of the mounting hole, thereby ensuring the rotation accuracy of the rotating body 200. The first support seat 120 and the second support seat 160 respectively realize the rotation support of the rotating shaft 220, which can ensure that the driving module 400 drives the rotating body 200 to stably rotate, the two ends of the rotating shaft 220 are respectively provided with the first bearing 140 and the second bearing 170, since the diameter of the rotating shaft 220 is relatively small with respect to the rotating disc 210, the diameters of the first bearing 140 and the second bearing 170 do not need to be too large, and since the rotating wheel on the rotating disc 210 can improve the rotation accuracy of the rotating body 200, the accuracy and assembly accuracy requirements of the first bearing 140 and the second bearing 170 are also relatively reduced, which is beneficial to cost.

[0066] Optionally, the first support seat 120 is provided with a first bearing fixing plate 150 for fixing the first bearing 140, and the second support seat 160 is provided with a second bearing fixing plate 180 for fixing the second bearing 170. It can be understood that the first bearing fixing plate 150 and the second bearing fixing plate 180 can avoid the first bearing 140 and the second bearing 170 from moving along the axial direction of the rotating shaft 220, thereby ensuring the installation stability of the first bearing 140 and the second bearing 170. It should be noted that in the embodiment of the present application, the parameters of the first bearing 140 and the second bearing 170 can be selected according to actual needs, and the related parameters of the first bearing 140 and the second bearing 170 are not limited herein.

[0067] Optionally, the limiting rods 230 are two, and the two limiting rods 230 are symmetrically arranged about the rotation axis of the rotating body 200. It can be understood that in the actual working process, one of the two winding needle assemblies 320 is located at the winding position, and the other is located at the discharging position. The arrangement of the two limiting rods 230 can facilitate the positioning of the rotating body 200 at different positions, thereby further improving the working reliability of the battery cell winding device.

[0068] Reference Figure 12 and Figure 13 As shown in FIG. 4, the drive module 400 includes a third driving member 410, a belt transmission assembly 420, a slip ring mounting seat 430, and a slip ring body 440. The third driving member 410 is installed on the second support seat 160. The driving wheel 421 of the belt transmission assembly 420 is connected with the output shaft of the third driving member 410. The driven wheel 422 of the belt transmission assembly 420 is connected with the other end of the rotating shaft 220. The driving wheel 421 and the driven wheel 422 are matched with the transmission belt 423. The slip ring mounting seat 430 is installed on the second support seat 160 and has a through hole. The slip ring body 440 is rotatably connected to the slip ring mounting seat 430 and is connected with the rotating shaft 220. The slip ring body 440 is provided with a wire outlet hole. It can be understood that the third driving member 410 can be a servo motor or other rotating driving member. The third driving member 410 drives the rotating shaft 220 through the belt transmission assembly 420, which not only ensures stable driving of the rotating shaft 220 but also helps to reduce the manufacturing cost of the drive module 400. In order to meet the power supply requirement of the winding needle driving assembly 310, the winding needle driving assembly 310 needs a wire, and the winding needle assembly 320 also needs to be provided with auxiliary structures such as air pipes. The slip ring body 440 is fixed on the second support seat 160 through the slip ring mounting seat 430, and the slip ring body 440 is provided with a wire outlet hole, which facilitates the wire or air pipe structure to pass through, and avoids the phenomenon of cable or air pipe winding when the third driving member 410 drives the rotating body 200 to move.

[0069] Optionally, the output shaft of the third driving member 410 is connected with the input end of the second speed reducer 450, and the output end of the second speed reducer 450 is connected with the driving wheel 421. The speed reduction and torque increase of the second speed reducer 450 can ensure that the third driving member 410 stably drives the rotating body 200 to rotate. Further optionally, the shell of the second speed reducer 450 is installed on the second support seat 160 through a second speed reduction mounting plate 460, thereby facilitating the installation of the second speed reducer 450. The connection mode between the second speed reduction mounting plate 460 and the second support seat 160 can be any detachable connection mode such as screw connection or buckle connection, which can be selected according to actual needs.

[0070] It should be noted that in other embodiments of the present application, the driving module 400 can also be directly formed as a rotary cylinder to drive the rotation of the rotating body 200, or can be a motor driving a gear assembly to drive the rotation of the rotating body 200, and is not limited to the form of the third driving member 410 driving the movement of the belt transmission assembly 420 in the embodiment.

[0071] Reference Figures 14-16 As shown, the needle driving assembly 310 includes a second linear driving unit 311 and a second rotary driving unit 312. The second linear driving unit 311 includes a first driving member 3111, a first fixed seat 3112, a second fixed seat 3113, a lead screw 3114, and a sliding seat 3115. The two ends of the lead screw 3114 are rotatably connected to the first fixed seat 3112 and the second fixed seat 3113, respectively. One end of the lead screw 3114 passes through the first fixed seat 3112 and is connected to the first driving member 3111 through a shaft coupling 3116. The sliding seat 3115 is threadedly connected to the lead screw 3114 and is connected to the second rotary driving unit 312. The second rotary driving unit 312 is connected to the needle assembly 320. It can be understood that in actual work, the first driving member 3111 drives the rotation of the lead screw 3114. The two ends of the lead screw 3114 are rotatably connected to the first fixed seat 3112 and the second fixed seat 3113, respectively, which can ensure the stable rotation of the lead screw 3114 under the drive of the first driving member 3111. The lead screw 3114 is matched with the sliding seat 3115. During the rotation of the lead screw 3114, the sliding seat 3115 can drive the second rotary driving unit 312 to move along the axial direction of the lead screw 3114, thereby achieving the driving of the needle assembly 320 to advance or retract the needle. The lead screw nut pair composed of the sliding seat 3115 and the lead screw 3114 has good motion precision and is convenient to control, thereby ensuring the stable and precise movement of the needle assembly 320 during the advancing or retracting of the needle. It should be noted that in other embodiments of the present application, the second linear driving unit 311 can also be directly a cylinder, an electric push rod, or a motor driving a gear 5222 rack, and is not limited to the driving structure described above.

[0072] Optionally, the rotating shaft 220 is further provided with a first sliding rail 3117, and the first sliding rail 3117 is provided with a first sliding block 3118 connected to the second rotary driving unit 312. It can be understood that when the second linear driving unit 311 drives the needle assembly 320 to move linearly, the first sliding block 3118 can slide on the first sliding rail 3117, thereby limiting the movement of the needle assembly 320 and avoiding the phenomenon of jamming of the needle assembly 320 during the advancing or retracting of the needle.

[0073] Optionally, the second rotating driving unit 312 comprises a second driving member 3121 connected with the winding needle assembly 320 and a winding needle mounting base 3122 connected with the power output end, and the winding needle mounting base 3122 has a mounting cavity with two open ends. The winding needle assembly 320 comprises a winding needle rotating shaft 321 and a winding needle body 322. The winding needle rotating shaft 321 is rotatably arranged in the mounting cavity, and the winding needle body 322 is connected to one end of the winding needle rotating shaft 321 extending out of the mounting cavity. A third bearing 3123 is arranged between the winding needle rotating shaft 321 and the inner side wall of the mounting cavity. It can be understood that the winding needle assembly 320 is divided into the winding needle rotating shaft 321 and the winding needle body 322, and the winding needle body 322 can be replaced according to actual needs in actual work, thereby improving the compatibility of the battery cell winding device. The third bearing 3123 is arranged between the winding needle rotating shaft 321 and the inner side wall of the mounting cavity, and the support of the two third bearings 3123 can ensure that the winding needle rotating shaft 321 can stably rotate under the driving of the second driving member 3121, and external dirt cannot enter the mounting cavity, avoiding the friction between the rotating shaft 220 and the winding needle mounting base 3122, which is beneficial to prolong the service life of the second rotating driving unit 312.

[0074] Further optionally, a stop step is arranged on the winding needle rotating shaft 321 for mounting the third bearing 3123. The third bearing 3123 near the second driving member 3121 is fixed on the winding needle rotating shaft 321 by a bearing fixing nut 3124. In this way, the third bearing 3123 can be prevented from moving relative to the winding needle rotating shaft 321.

[0075] Further optionally, the second driving member 3121 is matched with the winding needle rotating shaft 321 through a first speed reducer 3125. The first speed reducer 3125 can realize speed reduction and torque increase, thereby ensuring that the second driving member 3121 can stably drive the winding needle assembly 320 to rotate. Further optionally, the shell of the first speed reducer 3125 is installed on the winding needle mounting base 3122 through a first speed reduction mounting plate 3126, thereby facilitating the installation of the second speed reducer 450. The connection mode between the second speed reduction mounting plate 460 and the winding needle mounting base 3122 can be any detachable connection mode such as screw connection and buckle connection, which can be selected according to actual needs.

[0076] Reference Figure 17As shown, the positioning module 700 comprises a positioning mounting base 710, a positioning driving member 720 and a positioning plate 730. The positioning mounting base 710 is connected with the rack 100. The positioning driving member 720 is mounted on the positioning mounting base 710. The positioning plate 730 is connected with the positioning driving member 720. The positioning plate 730 has a positioning groove 731 matched with the positioning member 231. It can be understood that, in actual working process, the positioning driving member 720 drives the positioning plate 730 to move. When the positioning groove 731 is matched with the positioning member 231, the rotating body 200 can be positioned. When the positioning driving member 720 drives the positioning plate 730 to move so that the positioning groove 731 is separated from the positioning member 231, the rotating body 200 can be released. This positioning and releasing mode is very simple, which is beneficial to ensure the firmness of the positioning of the rotating body 200.

[0077] Optionally, the positioning driving member 720 is a pneumatic cylinder. The positioning plate 730 is matched with the floating joint 740. Thus, the movement of the positioning plate 730 is facilitated. The structure of the positioning module 700 is simplified. The manufacturing cost of the positioning module 700 is reduced.

[0078] Optionally, the positioning module 700 further comprises a slide rail fixing plate 780. The slide rail fixing plate 780 is connected with the positioning mounting base 710 through a positioning adapter plate 790. The second slide rail 750 is arranged on the slide rail fixing plate 780. The second slide block 760 is arranged on the second slide rail 750. The second slide block 760 is matched with the positioning plate 730. It can be understood that, during the movement of the positioning plate 730 driven by the positioning driving member 720, the second slide block 760 can slide on the second slide rail 750. Thus, the movement direction of the positioning plate 730 is guided and limited. The jamming caused by the skew of the positioning plate 730 is avoided. Further optionally, the positioning driving member 720 is fixed on the slide rail fixing plate 780 through a driving mounting plate 770. Thus, the positioning driving member 720 can be conveniently mounted. The connection stability of the positioning driving member 720 is improved.

[0079] Reference Figure 18As shown, the lock mouth module 800 comprises a lock mouth driving member 810, a lock mouth connecting seat 820 and a lock mouth body 830, the lock mouth driving member 810 is installed on the rotating shaft 220, the lock mouth connecting seat 820 is in transmission cooperation with the lock mouth driving member 810 and can move along the axial direction of the needle assembly 320 under the driving of the lock mouth driving member 810, the lock mouth body 830 is rotatably connected to the lock mouth connecting seat 820 and can abut against the end of the needle body 322 away from the needle rotating shaft 321. It can be understood that, in the actual working process, the lock mouth driving member 810 drives the lock mouth connecting seat 820 to move, so that the lock mouth body 830 abuts against the end of the needle body 322 away from the needle rotating shaft 321, since the lock mouth body 830 is rotatably connected to the lock mouth connecting seat 820, when the second driving member 3121 drives the needle rotating shaft 321 to rotate, the lock mouth body 830 can move synchronously with the needle rotating shaft 321, avoiding relative friction between them, thereby prolonging the service life of the lock mouth module 800.

[0080] Optionally, the lock mouth module 800 further comprises a second screw rod fixing seat 840, the second screw rod fixing seat 840 is connected to the shell of the lock mouth driving member 810, the two ends of the second screw rod body 850 are rotatably installed on the second screw rod fixing seat 840 and one end penetrates through the second screw rod fixing seat 840 and is connected to the output shaft of the lock mouth driving member 810. The second screw rod nut 860 is threadedly connected on the second screw rod body 850 and is connected to the lock mouth connecting seat 820. It can be understood that, in the actual working process, the lock mouth driving member 810 drives the second screw rod body 850 to rotate, the two ends of the second screw rod body 850 are rotatably connected to the second screw rod fixing seat 840, which can ensure that the second screw rod body 850 stably rotates under the driving of the lock mouth driving member 810, the second screw rod nut 860 is matched on the second screw rod body 850, during the rotation of the second screw rod body 850, the second screw rod nut 860 can drive the lock mouth connecting seat 820 to move along the axial direction of the second screw rod body 850, thereby realizing the compression or release of the needle assembly 320. The screw nut pair composed of the second screw rod nut 860 and the second screw rod body 850 has good movement precision and is convenient to control, thereby ensuring the stable and accurate compression and release of the needle assembly 320. Of course, it needs to be supplemented that, in other embodiments of the present application, the lock mouth driving member 810 can also be a gas cylinder, an electric push rod or a motor driving gear 5222 rack, and is not limited to the driving structure described above.

[0081] Optionally, the fourth bearing 890 is arranged between the lock mouth body 830 and the lock mouth connecting seat 820, and the fourth bearing 890 is fixed by the bearing outer fixing ring 870 and the bearing inner fixing ring 880. It can be understood that the fourth bearing 890 added can reduce the friction between the lock mouth body 830 and the lock mouth connecting seat 820, and avoid the pollutants entering the cooperation gap between the lock mouth body 830 and the lock mouth connecting seat 820, so as to further avoid the friction between the lock mouth body 830 and the lock mouth connecting seat 820, prolong the service life of the lock mouth module 800.

[0082] In the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation manners of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present application. It is unnecessary and impossible to enumerate all the implementation manners here. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A battery core winding device, characterized in that: include: Rack(100); A rotating body (200), the rotating body (200) being rotatably mounted on the frame (100); Two needle winding modules (300), each needle winding module (300) is mounted on the rotating body (200), and each needle winding module (300) includes a needle winding drive assembly (310) and a needle winding assembly (320), wherein the needle winding drive assembly (310) is used to drive the needle winding assembly (320) to rotate and the needle winding assembly (320) to move axially; a driving module (400), the driving module (400) being mounted on the frame (100) and connected to the rotating body (200) to drive the rotating body (200) to rotate; a diaphragm roller (600), the diaphragm roller (600) being mounted on the frame (100); A flying cutting module (500), the flying cutting module (500) is installed on the frame (100), the flying cutting module (500) comprises a cutter assembly (510) and a cutter drive assembly (520), the cutter drive assembly (520) is used to drive the cutter assembly (510) to move toward or away from the needle winding module (300), and can drive the cutter assembly (510) to rotate; Wherein: the diaphragm (10) is stopped at the diaphragm roller (600) and is connected to one of the winding needle modules (300); in the process of cutting the diaphragm (10), the driving module (400) drives the rotating body (200) to rotate so that the other winding needle module (300) is stopped at the diaphragm (10); and the cutter assembly (510) has the same angular velocity and rotation center as the winding needle module (300) stopped at the diaphragm (10) when moving in a direction close to the diaphragm (10).

2. The battery core winding device according to claim 1, characterized in that: The cutter drive assembly (520) includes: a first linear drive unit (521), the first linear drive unit (521) comprising a first drive source (5211) and a linear transmission structure, the power input end of the linear transmission structure being connected to the output shaft of the first drive source (5211), and the power output end of the linear transmission structure being connected to the cutter assembly (510); A first rotary drive unit (522), the first rotary drive unit (522) includes a second drive source (5221) and a rotary transmission structure, the power input end of the rotary transmission structure is connected to the output shaft of the second drive source (5221), and the power output end of the rotary transmission structure is connected to the first linear drive unit (521).

3. The battery core winding device according to claim 2, characterized in that: The power input and output ends of the rotary transmission structure include a driving gear (5222), and the output end of the rotary transmission structure includes an arc-shaped rack (5223), the arc-shaped rack (5223) is engaged with the driving gear (5222), the driving gear (5222) is connected to the output shaft of the second driving source (5221), and the arc-shaped rack (5223) is connected to the first linear driving unit (521) via a rack mounting plate (5224).

4. The battery core winding device according to claim 3, characterized in that: The first rotation drive unit (522) further includes: a driving fixing plate (5225), the driving fixing plate (5225) being used for mounting the second driving source (5221); An arc-shaped guide rail (5226) and an arc-shaped slider (5227), wherein the arc-shaped slider (5227) cooperates with the arc-shaped guide rail (5226), one of the arc-shaped guide rail (5226) and the arc-shaped slider (5227) is connected to the driving fixed plate (5225), and the other of the arc-shaped guide rail (5226) and the arc-shaped slider (5227) is connected to the rack mounting plate (5224).

5. The battery core winding device according to claim 1, characterized in that: The cutter assembly (510) comprises: a cutter fixing seat (511), the cutter fixing seat (511) being connected to the cutter driving assembly (520); A floating pressure head (512), the floating pressure head (512) being slidably mounted on the cutter fixing seat (511), the floating pressure head (512) having a pressure roller body (5121) resting against the diaphragm (10), the pressure roller bodies (5121) being arranged in pairs; a first elastic member (513), one end of the first elastic member (513) abutting against the cutter fixing seat (511), and the other end abutting against the floating pressure head (512); A cutter body (514), the cutter body (514) is fixedly connected to the cutter fixing seat (511) and is located between the paired pressure roller bodies (5121); wherein: When the cutter drive assembly (520) drives the cutter assembly (510) to move, the pressure roller body (5121) contacts the diaphragm (10) before the cutter body (514).

6. The battery core winding device according to claim 5, characterized in that: The floating pressure head (512) further comprises: Press roller connecting seat (5122); A sliding shaft (5123), one end of the sliding shaft (5123) is connected to the pressure roller connecting seat (5122), and the other end is passed through the cutter fixing seat (511), and the first elastic member (513) is sleeved on the sliding shaft (5123); The pressure roller connecting shafts (5124) are arranged in pairs, and the paired pressure roller connecting shafts (5124) are respectively connected to the two opposite side walls of the pressure roller connecting seat (5122), and the two ends of the pressure roller body (5121) are rotatably connected to the paired pressure roller connecting shafts (5124).

7. The battery core winding device according to claim 5, characterized in that: The cutter assembly (510) further comprises: a cutter connecting plate (515), one end of the cutter connecting plate (515) being connected to the cutter fixing seat (511), and the other end being connected to the cutter body (514); An auxiliary pressure head (516) is slidably mounted on the cutter connecting plate (515) in a direction perpendicular to the sliding direction of the floating pressure head (512), and the auxiliary pressure head (516) has a plurality of auxiliary pressure rollers (5161) that abut against the diaphragm (10); A second elastic member, one end of the second elastic member abuts against the cutter connecting plate (515), and the other end abuts against the auxiliary pressure head (516).

8. The battery core winding device according to claim 7, characterized in that: The auxiliary pressure head (516) includes: A floating plate (5162), wherein one end of the floating plate (5162) is provided with a plurality of mounting grooves, and a rotatable auxiliary pressure roller (5161) is disposed in each of the mounting grooves; A floating shaft (5163), one end of the floating shaft (5163) is connected to the floating plate (5162), the other end is passed through the cutter connecting plate (515), and the second elastic member is sleeved on the floating shaft (5163).

9. The battery core winding device according to any one of claims 1 to 8, characterized in that: The rotating body (200) is provided with a positioning member (231); the battery core winding device further comprises a positioning module (700), the positioning module (700) is installed on the frame (100), the positioning module (700) has a positioning position for positioning the positioning member (231) and a release position for releasing the positioning member (231); when the positioning module (700) positions the positioning member (231), the rotating body (200) is fixed relative to the frame (100).

10. The battery core winding device according to any one of claims 1 to 8, characterized in that: The battery cell winding device further comprises a locking nozzle module (800), wherein the locking nozzle module (800) is mounted on the rotating body (200), and the locking nozzle module (800) has a pressing state for pressing the winding needle assembly (320) and a disengaging state for disengaging from the winding needle assembly (320). When the locking nozzle module (800) is in the pressing state, the battery cell on the winding needle assembly (320) is fixed relative to the winding needle assembly (320).

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