CN211945541U

CN211945541U - Circular coil needle discharge mechanism

Info

Publication number: CN211945541U
Application number: CN201922500115.8U
Authority: CN
Inventors: 王亨; 王慧光; 刘泽红
Original assignee: Dongguan Botuo Lithium Technology Co ltd
Current assignee: Dongguan Botuo Lithium Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-17
Anticipated expiration: 2029-12-31

Abstract

The utility model provides a circular coil needle unloading mechanism, which comprises a frame, a circular winding mechanism, a clamping mechanism, a bottom supporting mechanism, a blocking piece and a prepressing mechanism, wherein the circular winding mechanism is movably arranged on the frame and is used for winding a coil into a circular electric core, the clamping mechanism is movably arranged on the frame and is used for clamping the inner side and the outer side of the circular electric core, the bottom supporting mechanism is arranged on the frame in a liftable way, the bottom supporting mechanism is positioned below the circular winding mechanism and is used for supporting the circular electric core, the blocking piece is arranged on the bottom supporting mechanism along the moving direction of the circular winding mechanism and is used for blocking the circular electric core, the prepressing mechanism is movably arranged on the frame and is used for pressing the circular electric core downwards, the inner side and the outer side of the circular electric core are clamped by the clamping mechanism and the bottom of the circular electric core is, so that the prepressing mechanism can press the round cell into an oval shape.

Description

Circular coil needle discharge mechanism

Technical Field

The utility model relates to an electric core of battery coils the field, especially relates to a circular book needle shedding mechanism.

Background

In the production process of winding the lithium battery cell, the winding speed is one of the reasons for influencing the productivity. The shape of the winding needle is the key for improving the winding speed, the existing winding needle is an elliptical winding needle, the wound battery cell is elliptical and cannot roll on the discharging tray, but the elliptical winding needle is provided with a long axis and a short axis, so that the winding speed of the elliptical winding needle is generally low, and the poor pole piece can be caused if the winding speed of the elliptical winding needle is directly provided. The winding needle is changed from an elliptical winding needle into a circular winding needle, so that the problem of low winding speed can be solved. However, the use of a round winding needle has the following problems: the electric core that circular book needle was convoluteed is circular, leads to circular electric core can roll in the tray when unloading to cause electric core to be crushed and hinder and utmost point ear margin bad scheduling problem.

Therefore, in the discharging process, a circular winding needle discharging mechanism capable of prepressing the battery core into an oval shape is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can become oval-shaped circular book needle shedding mechanism with electric core pre-compaction.

In order to achieve the above object, the utility model provides a circular coil needle shedding mechanism, including frame, circular winding mechanism, clamping mechanism, hold in the palm end mechanism, block and prepressing mechanism, circular winding mechanism movably set up in the frame and be used for rolling up into circular electric core with coming, clamping mechanism movably set up in the frame and be used for right the inboard and the outside of circular electric core press from both sides tightly, hold in the palm end mechanism with setting up in the frame, hold in the palm end mechanism and be located circular winding mechanism's below is used for holding circular electric core, block along circular winding mechanism's direction of movement set up in hold in the palm end mechanism and be used for blocking circular electric core, prepressing mechanism movably set up in the frame and be used for pushing down circular electric core, borrow by clamping mechanism presss from both sides tightly the inboard and the outside of circular electric core and hold in the end mechanism holds in the support circular electric core The bottom of the core enables the circular winding mechanism to be movably separated from the circular battery core, so that the pre-pressing mechanism can press the circular battery core downwards to be oval.

Preferably, the clamping mechanism includes two clamping needle assemblies and a clamping driving mechanism, the two clamping needle assemblies are respectively movably disposed on the rack, a synchronization rod is disposed between the two clamping needle assemblies, the clamping driving mechanism is connected to one of the clamping needle assemblies, and the clamping driving mechanism drives the two clamping needle assemblies to move, so that the two clamping needle assemblies respectively clamp the inner side and the outer side of two ends of the circular battery cell on the circular winding mechanism.

Preferably, the clamping mechanism further includes a first X-axis guide rail and a Y-axis guide rail, the first X-axis guide rail is disposed on the frame, the two Y-axis guide rails are slidably disposed on the first X-axis guide rail respectively, the first X-axis guide rail and the Y-axis guide rail are vertically disposed, and each of the clamping needle assemblies is slidably disposed on one of the Y-axis guide rails.

Preferably, the bottom supporting mechanism is provided with a driving oblique block, two sides of the driving oblique block are respectively provided with a driving oblique surface, the driving oblique block is located between the two Y-axis guide rails, and the bottom supporting mechanism is lifted, so that the driving oblique block drives the two Y-axis guide rails to move in a direction away from the Y-axis guide rails through the driving oblique surfaces.

Preferably, the two Y-axis guide rails are both provided with a roller, and the driving oblique block can push the roller through the driving oblique plane, so as to push the Y-axis guide rails to slide.

Preferably, a reset elastic part for resetting the Y-axis guide rail is arranged between the Y-axis guide rail and the frame.

Preferably, the clamping needle assembly includes an inner clamping needle, an outer clamping needle, and a retracting driving mechanism, the inner clamping needle and the retracting driving mechanism are respectively disposed on the Y-axis guide rail, an output end of the retracting driving mechanism is connected to the outer clamping needle, and the retracting driving mechanism drives the outer clamping needle to move toward the inner clamping needle, so that the inner clamping needle and the outer clamping needle clamp the inner side and the outer side of the circular electrical core.

Preferably, the bottom supporting mechanism includes a bottom supporting driving mechanism and a tray, the bottom supporting driving mechanism is disposed on the rack, the tray is disposed on the bottom supporting driving mechanism and located below the circular winding mechanism, the blocking member is disposed above the tray, and the bottom supporting driving mechanism drives the tray to ascend, so that the tray supports the bottom of the circular battery cell.

Preferably, the tray is flat.

Preferably, the bottom supporting driving mechanism comprises a rotating motor, a screw rod mechanism and a connecting frame, the rotating motor is arranged on the rack, the screw rod mechanism comprises a screw rod and a nut which is connected with the screw rod in a matching manner, the screw rod is connected with the output end of the rotating motor, the connecting frame is connected with the nut, and the tray is fixed on the connecting frame.

Preferably, the pre-pressing mechanism includes a pre-pressing movement driving mechanism and a first pressing mechanism, the first pressing mechanism is slidably disposed on the frame, the pre-pressing movement driving mechanism is disposed on the frame, and an output end of the pre-pressing movement driving mechanism is connected to the first pressing mechanism and can drive the first pressing mechanism to slide.

Preferably, the pre-pressing mechanism further comprises a second X-axis guide rail, the second X-axis guide rail is disposed on the frame, and the first pressing mechanism is slidably disposed on the second X-axis guide rail.

Preferably, the first pressing mechanism includes a first pressing support, a first pressing driving mechanism and a first pressing plate, the first pressing support is slidably disposed on the second X-axis guide rail, an output end of the pre-pressing movement driving mechanism is connected to the first pressing support, the first pressing driving mechanism is disposed on the first pressing support, the first pressing plate is connected to an output end of the first pressing driving mechanism, and the first pressing plate is driven by the first pressing driving mechanism to move downward and press the circular battery cell.

Preferably, the second pressing mechanism includes a second pressing driving mechanism and a second pressing plate, the second pressing driving mechanism is disposed on the first pressing mechanism, and an output end of the second pressing driving mechanism is connected to the second pressing plate and can drive the second pressing plate to press down.

Preferably, the circular winding needle discharging mechanism further comprises a moving mechanism, the moving mechanism is arranged on the rack, the clamping mechanism and the bottom supporting mechanism are arranged on the moving mechanism, and the moving mechanism drives the clamping mechanism and the bottom supporting mechanism to move.

Compared with the prior art, because the utility model discloses a circular coil needle shedding mechanism is equipped with circular winding mechanism, clamping mechanism, holds in the palm end mechanism, blocks piece and prepressing mechanism, so accessible clamping mechanism presss from both sides tightly the inboard and the outside of circular electric core and hold in the palm end mechanism and hold the bottom of circular electric core, through circular winding mechanism orientation breaks away from the direction of circular electric core removes, circular electric core breaks away from circular winding mechanism under the effect that blocks, thereby makes prepressing mechanism can follow prepressing mechanism is pushed down to the ellipse circular electric core's top. Therefore, the utility model discloses a circular book needle shedding mechanism can become the ellipse with electric core pre-compaction, has solved and has adopted circular book needle speeding back electric core to unload and take place rolling problem to improve electric core quality, reach the effect of speeding increase production.

Drawings

Fig. 1 is a schematic perspective view of the circular winding needle discharging mechanism of the present invention.

Fig. 2 is a schematic structural view of the circular winding needle of the circular winding mechanism of the circular winding needle discharging mechanism of the present invention.

Fig. 3 is a schematic perspective view of the clamping mechanism of the circular winding needle discharging mechanism of the present invention.

Fig. 4 is a schematic perspective view of the bottom supporting mechanism of the circular winding needle discharging mechanism of the present invention.

Fig. 5 is a schematic perspective view of the pre-pressing mechanism of the circular winding needle discharging mechanism of the present invention.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.

Referring to fig. 1 and 2, the circular winding needle discharging mechanism 100 of the present invention includes a frame 1, a circular winding mechanism 2, a clamping mechanism 3, a bottom supporting mechanism 4, a blocking member 5 and a pre-pressing mechanism 6, wherein the circular winding mechanism 2 is movably disposed on the frame 1 and is used for winding incoming materials into a circular battery cell 200, a circular winding needle 21 of the circular winding mechanism 2 has two grooves 211, and the circular winding mechanism 2 is an existing mechanism, so that it is not cumbersome herein; clamping mechanism 3 movably sets up in frame 1 and is used for pressing from both sides the inboard and the outside of circular electricity core 200 tightly, hold in the palm end mechanism 4 and set up in frame 1 with liftable, hold in the palm end mechanism 4 and be located the below of circular winding mechanism 2 and be used for holding circular electricity core 200, it sets up on holding in the palm end mechanism 4 and is used for stopping circular electricity core 200 to block piece 5 along the moving direction of circular winding mechanism 2, prepressing mechanism 6 movably sets up in frame 1 and is used for pushing down circular electricity core 200, borrow clamping mechanism 3 to press from both sides the inboard and the outside of circular electricity core 200 and hold in the palm end mechanism 4 and hold in the palm the bottom of circular electricity core 200, make circular winding mechanism 2 portable the breaking away from circular electricity core 200, thereby make prepressing mechanism 6 can push.

Referring to fig. 1 and 3, the clamping mechanism 3 includes two clamping needle assemblies 31 and a clamping driving mechanism 32, the two clamping needle assemblies 31 are respectively movably disposed on the rack 1, a synchronization rod 33 is disposed between the two clamping needle assemblies 31, the clamping driving mechanism 32 is connected to one of the clamping needle assemblies 31, and the clamping driving mechanism 32 drives the two clamping needle assemblies 31 to move, so that the two clamping needle assemblies 31 respectively clamp the inner sides and the outer sides of the two ends of the circular battery cell 200 on the circular winding mechanism 2. The clamping driving mechanism 32 may be an existing air cylinder or linear motor. Specifically, the clamping mechanism 3 further includes a first X-axis guide rail 34 and a Y-axis guide rail 35, the first X-axis guide rail 34 is disposed on the frame 1, the two Y-axis guide rails 35 are slidably disposed on the first X-axis guide rail 34, the first X-axis guide rail 34 and the Y-axis guide rail 35 are vertically disposed, and each clamping needle assembly 31 is slidably disposed on one Y-axis guide rail 35. The bottom supporting mechanism 4 is provided with a driving inclined block 41, two sides of the driving inclined block 41 are respectively provided with a driving inclined surface 411, the driving inclined block 41 is located between the two Y-axis guide rails 35, and the bottom supporting mechanism 4 is lifted, so that the driving inclined block 41 drives the two Y-axis guide rails 35 to move towards a far direction through the driving inclined surfaces 411, and the clamping needle assembly 31 is driven to move and clamp the circular battery cell 200. More specifically, the two Y-axis guide rails 35 are provided with rollers 351, and the driving inclined block 41 can push the rollers 351 through the driving inclined plane 411, so as to push the Y-axis guide rails 35 to slide. Furthermore, a reset elastic piece 36 for resetting the Y-axis guide rail 35 is arranged between the Y-axis guide rail 35 and the frame 1. The bottom supporting mechanism 4 is lifted to drive the driving inclined block 41 to lift, so that when the driving inclined surface 411 of the driving inclined block 41 drives the two Y-axis guide rails 35 to move towards the direction of separating, the two Y-axis guide rails 35 respectively stretch the reset elastic members 36, and when the driving inclined block 41 releases the roller 351, the Y-axis guide rails 35 can reset under the elastic restoring force of the reset elastic members 36. The return elastic member 36 may be an existing compression spring, but is not limited thereto.

Referring to fig. 1 and fig. 3, in the present embodiment, the clamping needle assembly 31 includes an inner clamping needle 311, an outer clamping needle 312, and a retracting driving mechanism 313, the inner clamping needle 311 and the retracting driving mechanism 313 are respectively disposed on the Y-axis guide rail 35, an output end of the retracting driving mechanism 313 is connected to the outer clamping needle 312, and the retracting driving mechanism 313 drives the outer clamping needle 312 to move toward the inner clamping needle 311, so that the inner clamping needle 311 and the outer clamping needle 312 clamp the inner side and the outer side of the circular electrical core 200. The bottom supporting mechanism 4 drives the Y-axis guide rail 35 to slide along the first X-axis guide rail 34 by driving the inclined block 41, so as to drive the clamping inner needle 311 to move to push against the inner side of the circular battery cell 200, and drives the clamping outer needle 312 to move towards the clamping inner needle 311 by the folding driving mechanism 313, so as to enable the clamping inner needle 311 and the clamping outer needle 312 to clamp the inner side and the outer side of the circular battery cell 200. Among them, the folding driving mechanism 313 includes conventional mechanisms such as an air cylinder and a linear motor.

Referring to fig. 1 and 4, the bottom supporting mechanism 4 includes a bottom supporting driving mechanism 42 and a tray 43, the bottom supporting driving mechanism 42 is disposed on the frame 1, the tray 43 is disposed on the bottom supporting driving mechanism 42 and below the circular winding mechanism 2, the blocking member 5 is disposed above the tray 43, and the tray 43 is driven by the bottom supporting driving mechanism 42 to ascend, so that the tray 43 supports the bottom of the circular battery cell 200. In the present embodiment, the tray 43 is a flat plate, but not limited thereto. Specifically, the bottom supporting driving mechanism 42 includes a rotating motor 421, a screw rod mechanism 422 and a connecting frame 423, the rotating motor 421 is disposed on the frame 1, the screw rod mechanism 422 includes a screw rod 422a and a nut 422b cooperatively connected with the screw rod 422a, the screw rod 422a is connected with an output end of the rotating motor 421, the connecting frame 423 is connected with the nut 422b, and the tray 43 is fixed on the connecting frame 423. More specifically, a synchronous belt drive mechanism 424 is further provided between the rotary motor 421 and the lead screw 422 a. The synchronous belt transmission mechanism 424 is driven to move through the rotating motor 421, so as to drive the screw rod 422a to rotate, thereby driving the nut 422b to ascend, and the nut 422b ascends to drive the connecting frame 423 to ascend together with the tray 43, thereby enabling the tray 43 to support the bottom of the circular battery core 200.

Referring to fig. 1 and 5, the pre-pressing mechanism 6 includes a pre-pressing moving driving mechanism 61 and a first pressing mechanism 62, the first pressing mechanism 62 is slidably disposed on the frame 1, the pre-pressing moving driving mechanism 61 is disposed on the frame 1, and an output end of the pre-pressing moving driving mechanism 61 is connected to the first pressing mechanism 62 and can drive the first pressing mechanism 62 to slide. Specifically, the prepressing mechanism 6 further includes a second X-axis guide rail 63, the second X-axis guide rail 63 is disposed on the frame 1, and the first pressing mechanism 62 is slidably disposed on the second X-axis guide rail 63. The first pressing mechanism 62 includes a first pressing support 621, a first pressing driving mechanism 622, and a first pressing plate 623, the first pressing support 621 is slidably disposed on the second X-axis guide rail 63, an output end of the pre-pressing movement driving mechanism 61 is connected to the first pressing support 621, the first pressing driving mechanism 622 is disposed on the first pressing support 621, the first pressing plate 623 is connected to an output end of the first pressing driving mechanism 622, and the first pressing plate 623 is driven by the first pressing driving mechanism 622 to move downward and press the circular battery cell 200. Further, the prepressing mechanism 6 further includes a second pressing mechanism 64, the second pressing mechanism 64 is installed on the first pressing mechanism 62, and after the circular battery cell 200 is prepressed by the second pressing mechanism 64, the first pressing mechanism 62 presses the circular battery cell 200 into an oval shape. Preferably, the second pressing mechanism 64 includes a second pressing driving mechanism 641 and a second pressing plate 642, the second pressing driving mechanism 641 is disposed on the first pressing mechanism 62, and an output end of the second pressing driving mechanism 641 is connected to the second pressing plate 642 and can drive the second pressing plate 642 to press down. The second pressing driving mechanism 641 is disposed on the first pressing plate 623 of the first pressing mechanism 62, and the first pressing plate 623 is provided with a through groove for the second pressing plate 642 to pass through. The second pressing plate 642 is driven to press downwards by the second pressing driving mechanism 641, so that the second pressing plate 642 presses the middle of the circular battery cell 200, the clamping driving mechanism 32 of the clamping mechanism 3 can drive the clamping inner needle 311 and the clamping outer needle 312 to exit from the circular battery cell 200, and then the first pressing plate 623 is driven by the first pressing driving mechanism 622 to press the circular battery cell 200 downwards from above the circular battery cell 200, so as to press the circular battery cell 200 out of an oval shape.

Referring to fig. 1, in this embodiment, the circular winding needle discharging mechanism 100 of the present invention further includes a moving mechanism 7, the moving mechanism 7 is disposed on the frame 1, the clamping mechanism 3 and the bottom supporting mechanism 4 are disposed on the moving mechanism 7, and the moving mechanism 7 drives the clamping mechanism 3 and the bottom supporting mechanism 4 to move. The moving mechanism 7 comprises an X-axis mechanism 71 and a Y-axis mechanism 72 vertically arranged on the X-axis mechanism 71, and drives the clamping mechanism 3 and the bottom supporting mechanism 4 to move to required positions in advance through the X-axis mechanism 71 and the Y-axis mechanism 72, and then drives the clamping mechanism 3 and the bottom supporting mechanism 4 to act.

With reference to fig. 1 to 5, the circular winding pin unloading mechanism 100 of the present invention has the following specific working principle:

the clamping driving mechanism 32 of the clamping mechanism 3 drives the two clamping needle assemblies 31 to move forward, so that the clamping inner needle 311 of the clamping needle assembly 31 is inserted into the groove 211 of the circular winding needle 21, the clamping inner needle 311 is arranged on the inner side of the circular battery cell 200, and the clamping outer needle 312 is arranged on the outer side of the circular battery cell 200; the bottom supporting driving mechanism 42 of the bottom supporting mechanism 4 drives the tray 43 to ascend so as to support the circular battery cell 200, meanwhile, when the driving inclined block 41 of the bottom supporting mechanism 4 drives the two Y-axis guide rails 35 to move towards the direction away from through the driving inclined plane 411, the clamping inner needle 311 is driven to move to tightly abut against the inner side of the circular battery cell 200, the folding driving mechanism 313 drives the clamping outer needle 312 to move towards the clamping inner needle 311, and therefore the clamping inner needle 311 and the clamping outer needle 312 clamp the inner side and the outer side of the circular battery cell 200; the circular winding mechanism 2 moves towards the direction of separating from the circular battery cell 200, and the circular battery cell 200 is separated from the circular winding mechanism 2 under the action of the blocking piece 5; the pre-pressing driving moving mechanism 7 of the pre-pressing mechanism 6 drives the first pressing mechanism 62 and the second pressing mechanism 64 to move to the upper side of the circular battery cell 200, the second pressing driving mechanism 641 of the second pressing mechanism 64 drives the second pressing plate 642 to press down, so that the second pressing plate 642 presses the middle of the circular battery cell 200, the clamping driving mechanism 32 of the clamping mechanism 3 can drive the clamping inner needle 311 and the clamping outer needle 312 to exit from the circular battery cell 200, and then the first pressing driving mechanism 622 of the first pressing mechanism 62 drives the first pressing plate 623 to press down the circular battery cell 200 from the upper side of the circular battery cell 200, so as to press the circular battery cell 200 into an oval shape. Finally, the prepressing mechanism 6 retreats to complete the discharging of the wound round battery cell 200.

In summary, because the utility model discloses a circular coil needle shedding mechanism 100 is equipped with circular winding mechanism 2, clamping mechanism 3, holds in the palm end mechanism 4, holds in the palm 5 and prepressing mechanism 6, so the inboard and the outside that accessible clamping mechanism 3 presss from both sides tight circular electric core 200 and hold in the palm end mechanism 4 and hold the bottom of circular electric core 200, move towards the direction that breaks away from circular electric core 200 through circular winding mechanism 2, circular electric core 200 breaks away from circular winding mechanism 2 under the effect that blocks 5 to make prepressing mechanism 6 can be pushed down into the ellipse with prepressing mechanism 6 from the top of circular electric core 200. Therefore, the utility model discloses a circular book needle shedding mechanism 100 can become the ellipse with electric core pre-compaction, has solved and has adopted circular book needle 21 to accelerate the back electric core and unload and take place rolling problem to improve electric core quality, reach the effect of the increase in production of accelerating.

The above disclosure is only a preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereby, and all the equivalent changes made in the claims of the present invention are intended to be covered by the present invention.

Claims

1. A circular coil needle unloading mechanism is characterized by comprising a rack, a circular winding mechanism, a clamping mechanism, a bottom supporting mechanism, a blocking piece and a prepressing mechanism, wherein the circular winding mechanism is movably arranged on the rack and used for winding incoming coils into a circular battery cell, the clamping mechanism is movably arranged on the rack and used for clamping the inner side and the outer side of the circular battery cell, the bottom supporting mechanism is arranged on the rack in a lifting manner, the bottom supporting mechanism is positioned below the circular winding mechanism and used for supporting the circular battery cell, the blocking piece is arranged on the bottom supporting mechanism along the moving direction of the circular winding mechanism and used for blocking the circular battery cell, the prepressing mechanism is movably arranged on the rack and used for pressing the circular battery cell downwards, the clamping mechanism is used for clamping the inner side and the outer side of the circular battery cell, and the bottom supporting mechanism is used for supporting the bottom of the circular battery cell, so that the circular winding mechanism can be moved away from the circular battery cell, and the pre-pressing mechanism can press the circular battery cell into an oval shape.

2. The circular winding needle discharging mechanism according to claim 1, wherein the clamping mechanism includes two clamping needle assemblies and a clamping driving mechanism, the two clamping needle assemblies are movably disposed on the rack, a synchronization rod is disposed between the two clamping needle assemblies, and the clamping driving mechanism is connected to one of the clamping needle assemblies, and the two clamping needle assemblies are driven by the clamping driving mechanism to move, so that the two clamping needle assemblies clamp the inner side and the outer side of the two ends of the circular battery cell on the circular winding mechanism, respectively.

3. The circular needle winding and discharging mechanism according to claim 2, wherein the clamping mechanism further comprises a first X-axis guide rail and a Y-axis guide rail, the first X-axis guide rail is disposed on the frame, the two Y-axis guide rails are slidably disposed on the first X-axis guide rail respectively, the first X-axis guide rail and the Y-axis guide rail are disposed perpendicularly, and each clamping needle assembly is slidably disposed on one of the Y-axis guide rails.

4. The circular winding needle discharging mechanism according to claim 3, wherein the base supporting mechanism is provided with a driving slant block, two sides of the driving slant block are respectively provided with a driving slant surface, the driving slant block is located between the two Y-axis guide rails, and the driving slant block is lifted by the base supporting mechanism, so that the driving slant block drives the two Y-axis guide rails to move in a direction away from the Y-axis guide rails through the driving slant surfaces.

5. The circular winding needle discharging mechanism according to claim 4, wherein both of the Y-axis guide rails are provided with a roller, and the driving sloping block can push the roller through the driving sloping surface, so as to push the Y-axis guide rails to slide.

6. The circular winding needle discharging mechanism according to claim 4, wherein a return elastic member for returning the Y-axis guide rail is provided between the Y-axis guide rail and the frame.

7. The circular winding needle discharging mechanism according to claim 3, wherein the clamping needle assembly includes an inner clamping needle, an outer clamping needle, and a retracting driving mechanism, the inner clamping needle and the retracting driving mechanism are respectively disposed on the Y-axis guide rail, an output end of the retracting driving mechanism is connected to the outer clamping needle, and the retracting driving mechanism drives the outer clamping needle to move toward the inner clamping needle, so that the inner clamping needle and the outer clamping needle clamp the inside and the outside of the circular electrical core.

8. The circular winding needle discharging mechanism according to claim 1, wherein the backing mechanism includes a backing driving mechanism and a tray, the backing driving mechanism is disposed on the rack, the tray is disposed on the backing driving mechanism and located below the circular winding mechanism, the blocking member is disposed above the tray, and the backing driving mechanism drives the tray to ascend so that the tray holds the bottom of the circular battery cell.

9. The circular winding needle discharging mechanism according to claim 8, wherein the tray is flat.

10. The circular winding needle discharging mechanism according to claim 8, wherein the bottom supporting driving mechanism comprises a rotating motor, a screw rod mechanism and a connecting frame, the rotating motor is arranged on the frame, the screw rod mechanism comprises a screw rod and a nut cooperatively connected with the screw rod, the screw rod is connected with an output end of the rotating motor, the connecting frame is connected with the nut, and the tray is fixed on the connecting frame.

11. The circular winding needle discharging mechanism according to claim 1, wherein the pre-pressing mechanism includes a pre-pressing movement driving mechanism and a first pressing mechanism, the first pressing mechanism is slidably disposed on the frame, the pre-pressing movement driving mechanism is disposed on the frame, and an output end of the pre-pressing movement driving mechanism is connected to the first pressing mechanism and can drive the first pressing mechanism to slide.

12. The circular winding needle discharging mechanism according to claim 11, wherein the pre-pressing mechanism further comprises a second X-axis guide rail disposed on the frame, and the first pressing mechanism is slidably disposed on the second X-axis guide rail.

13. The circular winding needle discharging mechanism according to claim 12, wherein the first pressing mechanism includes a first pressing bracket, a first pressing driving mechanism and a first pressing plate, the first pressing bracket is slidably disposed on the second X-axis guide rail, an output end of the pre-pressing movement driving mechanism is connected to the first pressing bracket, the first pressing driving mechanism is disposed on the first pressing bracket, the first pressing plate is connected to an output end of the first pressing driving mechanism, and the first pressing driving mechanism drives the first pressing plate to move downward and press the circular battery cell.

14. The circular winding needle discharging mechanism according to claim 11, wherein the pre-pressing mechanism further comprises a second pressing mechanism, the second pressing mechanism is mounted on the first pressing mechanism, and after the circular battery cell is pre-pressed by the second pressing mechanism, the first pressing mechanism presses the circular battery cell into an oval shape.

15. The circular winding needle discharging mechanism according to claim 14, wherein the second pressing mechanism comprises a second pressing driving mechanism and a second pressing plate, the second pressing driving mechanism is disposed on the first pressing mechanism, and an output end of the second pressing driving mechanism is connected to the second pressing plate and can drive the second pressing plate to press downward.

16. The circular winding needle discharging mechanism according to claim 1, further comprising a moving mechanism, wherein the moving mechanism is disposed on the frame, and the clamping mechanism and the backing mechanism are disposed on the moving mechanism, and the clamping mechanism and the backing mechanism are driven to move by the moving mechanism.