Tab bulldozing and auxiliary feeding mechanism and lithium battery winding machine
By introducing a tab flattening and auxiliary feeding mechanism into the lithium battery winding machine, the problems of tab rebound and low feeding accuracy were solved, improving the yield of battery cells and reducing equipment costs.
Patent Information
- Application Number
- CN202423077930.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-13
AI Technical Summary
In the process of winding cells, existing lithium battery winding machines are prone to the tabs rebounding or folding outwards, and the tab insertion accuracy is low, resulting in a low yield rate of cells.
Design an electrode flattening and auxiliary sheet feeding mechanism, including an electrode flattening component and an auxiliary sheet feeding component, which are installed on the diaphragm cutting component. The transmission unit drives the pressure roller and the rotating wheel flattening unit to press the electrode tabs, ensuring that the electrode tabs do not rebound or fold during the winding process, and assisting in the accurate feeding of the electrode sheets.
This improves the yield rate of battery cells, prevents the tabs from rebounding or folding during the winding process, ensures the accuracy of electrode insertion, and reduces equipment costs.
Smart Images
Figure CN223743675U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery manufacturing technology, and in particular to a tab flattening and auxiliary feeding mechanism and a lithium battery winding machine. Background Technology
[0002] In related technologies, during the winding process of battery cells, the winding machine needs to pre-fold the tabs of the electrode sheets. However, due to inertia and centrifugal force during the winding process, the tabs often rebound or fold outwards. This results in the need for multiple sets of tab gathering and flattening mechanisms in the next process, leading to a low yield of battery cells. At the same time, the current winding machine is prone to errors in the insertion of the electrode sheets before winding the battery cells, further contributing to the low yield of the wound battery cells.
[0003] There is still no effective solution to the problems of the tabs of the winding machine easily rebounding or folding outwards and the low accuracy of the tab insertion, which result in a low yield of the wound cells. Utility Model Content
[0004] In view of this, it is necessary to provide a tab flattening and auxiliary feeding mechanism and a lithium battery winding machine to at least solve the problem of low overall processing efficiency of winding machines that use a single diaphragm cutting and finishing method in related technologies.
[0005] In a first aspect, this utility model provides a technical solution as follows: an electrode flattening and auxiliary sheet feeding mechanism, mounted on the separator cutting assembly of a lithium battery winding machine, includes an electrode flattening assembly and an auxiliary sheet feeding assembly. The electrode flattening assembly is disposed on a follower seat of the separator cutting assembly, and the auxiliary sheet feeding assembly is disposed on the top of the mounting seat of the electrode flattening assembly. The electrode flattening assembly further includes a transmission unit, a pressure roller unit, and a rotary flattening unit. The transmission unit is disposed on the mounting seat, and the pressure roller unit is disposed at the front end of the transmission unit. The pressure roller mounting seat of the pressure roller unit is rotatably connected to the transmission unit. A rotary flattening unit is respectively provided on both sides of the pressure roller mounting seat. The auxiliary feeding assembly is used to follow the diaphragm cutting assembly to a preset position, and after the diaphragm cutting assembly completes the diaphragm cutting, it assists in guiding the corresponding electrode sheet into the winding needle located at the winding position; after the winding needle completes the diaphragm pre-winding, the transmission unit drives the pressure roller mounting seat to drive the pressure roller mounted at the front end of the pressure roller mounting seat to press the battery cell, and drives the two rotary wheel flattening units to press the inner and outer tabs of the battery cell respectively; during the battery cell winding process, the pressure roller mounting seat is driven to rotate, and drives the pressure roller to rotate with the wound battery cell, and maintains the pressure on the battery cell during the rotation; the rotary wheel flattening unit is used to press and flatten the corresponding tabs during the rotation following the pressure roller mounting seat.
[0006] In one embodiment, the transmission unit includes a guide, a movable seat, and a driver. The guide passes through the mounting groove of the mounting base and is convexly connected to the movable seat. The movable seat is also convexly connected to the driver disposed on the mounting base. The driver is used to drive the movable seat to move along the guide and drive the pressure roller mounting base connected to the movable seat to move toward or away from the winding needle, so as to drive the pressure roller to press or release the battery cell and to drive the rotary wheel flattening unit to press or release the corresponding electrode tab.
[0007] In one embodiment, the guide includes a linear guide rail, and / or the driver includes one of the following: a drive cylinder, a linear motor.
[0008] In one embodiment, the movable seat is further fixed with a rotating shaft bracket near the front end of the pressure roller unit. The rotating shaft bracket is rotatably connected to two rotating arms of the pressure roller mounting seat via a rotating shaft. Each rotating arm has a first anchor post extending laterally on one side. Each first anchor post is connected to a second anchor post located on both sides of the rotating shaft bracket via an elastic member. During the winding of the battery cell, the battery cell rotates and pushes the pressure roller to drive the rotating arm to rotate in the opposite direction of the battery cell winding direction. The matching elastic member pulls the rotating arm to rotate in the battery cell winding direction, so that the pressure roller mounting seat drives the pressure roller to rotate with the wound battery cell and keeps the battery cell pressed during the rotation.
[0009] In one embodiment, the elastic element includes a tension spring.
[0010] In one embodiment, the two rotating arms are also connected by a synchronous rotating shaft located on the inside opposite to the rotating shaft.
[0011] In one embodiment, the pivot bracket is further provided with a limiting post that extends vertically through the pivot bracket and downwards, the limiting post being used to limit the downward rotation angle of the pivot arm.
[0012] In one embodiment, the wheel flattening unit includes a wheel mounting shaft and a wheel. The wheel mounting shaft is perpendicular to the corresponding rotating arm and extends outward in the lateral direction. The wheel is fixed at the position where the corresponding wheel mounting shaft extends outward, and the wheel is configured to press down the inner and outer tabs of the wound battery cell in the set position.
[0013] In one embodiment, the auxiliary insert assembly includes a mounting plate, an adjusting plate, a support base, a rotary mounting base, a rotating shaft, and a rotating guide plate. The mounting plate is fixed to the top of the mounting base and has a groove extending along its length. A protrusion at the bottom of the adjusting plate is embedded in the groove, and the adjusting plate is also connected to an adjusting block fixed to the mounting plate via an adjusting nut. The support base is fixed to the side of the adjusting plate opposite to the side connected to the adjusting nut and has a locking groove penetrating the support base. The rotating mounting base is located on the other side of the support base opposite to the adjusting plate and is secured by a locking nut that passes through and exits the locking groove. 9) Connected to the support base, the rotating guide plate is movably connected to the rotating mounting base via the rotating shaft and is located on the side of the rotating mounting base away from the support base. The adjusting nut is used to rotate and pull the adjusting plate along the slide groove to a set position, so that the rotating guide plate is placed at a set auxiliary entry position. The locking nut is used to lock the rotating mounting base to the support base after the rotating mounting base has moved vertically to the set position, so that the rotating guide plate is placed at a set auxiliary entry height. The rotating guide plate is used to rotate to a set auxiliary entry angle to guide the corresponding electrode sheet to the winding needle located at the winding position.
[0014] Secondly, this utility model provides another technical solution as follows: a lithium battery winding machine, including a separator cutting assembly, wherein the separator cutting assembly is provided with the tab flattening and auxiliary sheet feeding mechanism described in the first aspect.
[0015] Compared with related technologies, the electrode flattening and auxiliary feeding mechanism and lithium battery winding machine provided in this application embodiment include an electrode flattening assembly and an auxiliary feeding assembly. The electrode flattening assembly is disposed on the follower seat of the separator cutting assembly, and the auxiliary feeding assembly is disposed on the top of the mounting seat of the electrode flattening assembly. The electrode flattening assembly further includes a transmission unit, a pressure roller unit, and a rotary flattening unit. The transmission unit is disposed on the mounting seat, and the pressure roller unit is disposed at the front end of the transmission unit. The pressure roller mounting seat of the pressure roller unit is rotatably connected to the transmission unit. A rotary flattening unit is respectively provided on both sides of the pressure roller mounting seat. The auxiliary feeding assembly moves with the separator cutting assembly to a preset position, and after the separator cutting assembly completes the separator cutting, it assists in guiding the corresponding electrode sheet into the winding needle located at the winding position. After the diaphragm is pre-wound, the transmission unit drives the pressure roller mounting seat to press the pressure roller mounted at the front end of the pressure roller mounting seat to press the battery cell, and drives the two rotary wheel flattening units to press the inner and outer tabs of the battery cell respectively; and during the battery cell winding process, the pressure roller mounting seat is driven to rotate, and the pressure roller rotates with the wound battery cell, and keeps pressing the battery cell during the rotation; by the rotary wheel flattening unit pressing and flattening the corresponding tabs as it rotates with the pressure roller mounting seat, the problems of tabs easily rebounding or folding outward and low tab insertion accuracy in related technologies, resulting in low yield of wound battery cells, are solved. By adding a structure that is compatible with auxiliary insertion and tab flattening in the winding area, not only can the accuracy of tab insertion be guaranteed, but also the rebound or folding of tabs during the winding process can be prevented, which can effectively improve the yield of battery cells and reduce the cost of equipment accordingly.
[0016] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description
[0017] Figure 1 This is an installation diagram of the tab flattening and auxiliary sheet insertion mechanism and the diaphragm cutting assembly according to an embodiment of this application;
[0018] Figure 2 This is a three-dimensional structural diagram of the tab flattening and auxiliary inserting mechanism according to an embodiment of this application;
[0019] Figure 3 This is a schematic diagram of another three-dimensional structure of the tab flattening and auxiliary inserting mechanism according to an embodiment of this application;
[0020] Figure 4 This is a front view of the tab flattening and auxiliary inserting mechanism according to an embodiment of this application;
[0021] Figure 5 This is a top view of the tab flattening and auxiliary inserting mechanism according to an embodiment of this application;
[0022] Figure 6 This is a perspective view of the tab flattening assembly according to an embodiment of this application;
[0023] Figure 7 This is a three-dimensional structural diagram of the auxiliary wafer insertion assembly according to an embodiment of this application.
[0024] Figure label:
[0025] 100. Diaphragm cutting assembly; 11. Follower seat;
[0026] 200. Electrode flattening assembly; 21. Mounting base; 22. Transmission unit; 23. Pressure roller unit; 24. Rotary wheel flattening unit; 25. Rotary shaft bracket; 221. Guide component; 222. Moving base; 223. Driver; 231. Pressure roller mounting base; 232. Pressure roller; 233. Rotary shaft; 234. Rotary arm; 235. First anchor post; 236. Elastic component; 237. Second anchor post; 238. Synchronous rotating shaft; 239. Limiting post; 241. Rotary wheel mounting shaft; 242. Rotary wheel;
[0027] 300. Auxiliary insert assembly; 31. Mounting plate; 32. Adjusting plate; 33. Support base; 34. Rotary mounting base; 35. Rotary shaft; 36. Rotary guide plate; 37. Adjusting nut; 38. Adjusting block; 39. Locking nut; 311. Slide groove; 321. Protruding rib; 331. Locking groove. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] It should be noted that when a component is said to be "mounted on" another component, it can be directly mounted on the other component or may be interspersed with a component. When a component is said to be "set on" another component, it can be directly set on the other component or may be interspersed with a component. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or may be interspersed with a component.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.
[0031] Please see Figures 1 to 7 The tab flattening and auxiliary feeding mechanism of this application embodiment is installed on the separator cutting assembly 100 of the lithium battery winding machine. It includes a tab flattening assembly 200 and an auxiliary feeding assembly 300. The tab flattening assembly 200 is disposed on the follower seat 11 of the separator cutting assembly 100, and the auxiliary feeding assembly 300 is disposed on the top of the mounting base 21 of the tab flattening assembly 200. The tab flattening assembly 200 also includes a transmission unit 22, a pressure roller unit 23, and a rotary flattening unit 24. The transmission unit 22 is disposed on the mounting base 21, and the pressure roller unit 23 is disposed at the front end of the transmission unit 22. The pressure roller mounting base 231 of the pressure roller unit 23 is rotatably connected to the transmission unit 22. A rotary flattening unit 24 is respectively provided on both sides of the pressure roller mounting base 231.
[0032] The auxiliary electrode feeding assembly 300 is used to follow the diaphragm cutting assembly 100 to a preset position, and after the diaphragm cutting assembly 100 completes the diaphragm cutting, it assists in guiding the corresponding electrode into the winding needle located at the winding position.
[0033] In this embodiment, after the previous cell has finished winding, the driving unit of the separator cutting assembly 100 (refer to...) Figure 1 The ball screw drive module (not numbered) drives the diaphragm cutting assembly 100 to cut the diaphragm. At the same time, the auxiliary insert assembly 300 simultaneously assists in inserting the electrode sheet, that is, guides the electrode sheet into the winding needle located at the winding position. After the electrode sheet is inserted, the winding needle begins to pre-wind the diaphragm. After the winding needle completes the pre-winding of the diaphragm, the drive unit drives the diaphragm cutting assembly 100 back to the preset waiting position. It should be understood that in this embodiment, the auxiliary insert assembly 300 and the tab flattening assembly 200 are mounted on the diaphragm cutting assembly 100. Therefore, when the drive unit drives the diaphragm cutting assembly 100 back to the preset waiting position, the auxiliary insert assembly 300 and the tab flattening assembly 200 follow and return to the corresponding positions. At this time, the auxiliary insert assembly 300 stops assisting in inserting the electrode sheet, and the tab flattening assembly 200 begins to flatten the tab.
[0034] After the diaphragm pre-winding is completed by the needle winding unit, the transmission unit 22 drives the pressure roller mounting base 231 to drive the pressure roller 232 mounted at the front end of the pressure roller mounting base 231 to press the battery cell, and drives the two rotating wheel flattening units 24 to press the inner and outer tabs of the battery cell respectively; during the battery cell winding process, the pressure roller mounting base 231 is driven to rotate, and drives the pressure roller 232 to rotate with the wound battery cell, and keeps pressing the battery cell during the rotation; the rotating wheel flattening unit 24 is used to press and flatten the corresponding tabs during the rotation of the pressure roller mounting base 231.
[0035] In this embodiment, after the diaphragm is pre-wound and the diaphragm cutting assembly 100 returns to the preset waiting position, the transmission unit 22 drives the pressure roller 232 to press the battery cell, and the two rotating wheel flattening units 24 press the inner and outer tabs respectively. As the diameter of the battery cell changes, the pressure roller 232 is driven to rotate with the battery cell, thereby driving the rotating wheel flattening units 24 to rotate in match, so as to keep pressing the corresponding tabs and flattening the corresponding tabs during the battery cell winding process; and when the battery cell is finished winding, the transmission unit 22 drives the pressure roller 232 and the rotating wheel flattening units 24 to return to the corresponding waiting position.
[0036] In the aforementioned electrode flattening and auxiliary feeding mechanism, the auxiliary feeding component 300 moves to a preset position following the diaphragm cutting component 100. After the diaphragm cutting component 100 completes the diaphragm cutting, it assists in guiding the corresponding electrode sheet into the winding needle located at the winding position. After the winding needle completes the diaphragm pre-winding, the transmission unit 22 drives the pressure roller mounting base 231 to drive the pressure roller 232 mounted at the front end of the pressure roller mounting base 231 to press the battery cell, and drives the two rotating wheel flattening units 24 to press the inner and outer electrodes of the battery cell respectively. Furthermore, during the battery cell winding process, the pressure roller mounting base 231 drives... The pressure roller 232 and the rotary flattening unit 24 rotate with the wound battery cell, and during the rotation, they respectively press the battery cell and press and flatten the corresponding tabs. This solves the problems in related technologies where the tabs of the winding machine are prone to rebounding or folding outwards and the tab insertion accuracy is low, resulting in a low yield of wound battery cells. By adding a structure that is compatible with auxiliary insertion and tab flattening in the winding area, it can not only ensure the accuracy of the tab insertion, but also prevent the tabs from rebounding or folding during the winding process. This can effectively improve the yield of battery cells and reduce the cost of the equipment accordingly.
[0037] It should be noted that the tab flattening and auxiliary wafer insertion mechanism in this embodiment of the application simultaneously combines the functions of tab flattening and auxiliary wafer insertion, which can effectively improve the quality of cell winding; by using the pressure roller unit 23 that rotates with the winding of the cell, it can be ensured that it performs a relatively following action as the diameter of the cell changes during the winding process, thereby ensuring that the cell is not damaged; by using the rotating wheel flattening unit 24 to perform relative movement during the winding of the cell, it can ensure that the tab pre-pressing is completed without damaging the tab.
[0038] To achieve the desired position of the drive roller 232 and the rotary flattening unit 24, refer to Figures 1 to 6 In one embodiment, the transmission unit 22 includes a guide 221, a movable seat 222, and a driver 223. The guide 221 passes through the mounting groove 201 of the mounting base 21 and is convexly connected to the movable seat 222. The movable seat 222 is also convexly connected to the driver 223 provided on the mounting base 21. The driver 223 is used to drive the movable seat 222 to move along the guide 221 and drive the pressure roller mounting seat 231 connected to the movable seat 222 to move toward or away from the winding needle, so as to drive the pressure roller 232 to press or release the battery cell, and the transmission wheel flattening unit 24 to press or release the corresponding electrode tab.
[0039] In this embodiment, the driver 223 includes, but is not limited to, one of the following: a drive cylinder, a linear motor, preferably a drive cylinder; in this embodiment, the guide 221 includes a linear guide rail.
[0040] To enable the pressure roller 232 and the rotary flattening assembly 200 to rotate following the winding of the battery cell, in some embodiments, reference is made to... Figures 1 to 6 The movable seat 222 is also fixedly provided with a rotating shaft bracket 25 near the front end of the pressure roller unit 23. The rotating shaft bracket 25 is rotatably connected to two rotating arms 234 of the pressure roller mounting seat 231 through a rotating shaft 233. Each rotating arm 234 has a first anchor post 235 extending laterally on one side. Each first anchor post 235 is connected to a second anchor post 237 on both sides of the rotating shaft bracket 25 through an elastic member 236. During the winding of the battery cell, the battery cell rotates and pushes the pressure roller 232 to drive the rotating arm 234 to rotate in the opposite direction of the battery cell winding direction. The matching elastic member 236 pulls the rotating arm 234 to rotate in the battery cell winding direction, so that the pressure roller mounting seat 231 drives the pressure roller 232 to rotate with the wound battery cell and keeps the battery cell pressed during the rotation.
[0041] It is understandable that by setting the elastic element 236, the elastic element 236 provides a force that is opposite to the force that drives the two rotating arms 234 to rotate, thus keeping the pressure roller 232 following the change in the diameter of the battery cell, ensuring that the battery cell is always pressed tightly, preventing the battery cell from coming apart, and at the same time, avoiding damage to the battery cell.
[0042] In this embodiment, the elastic element 236 includes, but is not limited to, a tension spring.
[0043] In order to make the two rotating arms 234 rotate synchronously, thereby preventing the pressure roller 232 from tilting in the radial direction during rotation, in some alternative embodiments, the two rotating arms 234 are also connected by a synchronous rotating shaft 238 located on the inner side opposite to the rotating shaft 233.
[0044] It should be noted that by setting a synchronous rotating shaft 238 to connect two rotating arms 234, a complete frame-type pressure roller mounting seat 231 is formed, so that the two ends of the pressure roller 232 are at the same height when rotating with the wound battery cell, and the pressure roller 232 presses the battery cell at the same horizontal line, and also ensures that the two rotating wheel flattening units 24 are at the same height, thereby ensuring that the inner and outer tabs located on the inner and outer sides of the battery cell can be pressed synchronously.
[0045] Understandably, this setup, using a pressure roller unit 23 with springs and a rotating shaft, ensures that the rollers follow the changes in the diameter of the battery cell during the winding process, thus preventing damage to the battery cell.
[0046] In order to limit the rotation angle of the pressure roller mounting seat 231 to be within a set angle range, in some embodiments, the rotating shaft support 25 is also provided with a limiting post 239 that extends vertically through the rotating shaft support 25 and downwards. The limiting post 239 is used to limit the downward rotation angle of the rotating arm 234.
[0047] It is understandable that during the winding process, the battery cell will only generate a force that pushes the rotating arm 234 downward. However, in order to prevent the rotating arm 234 from rotating excessively when rotating around the rotating shaft 233, a limit post 239 is set to prevent the end of the rotating arm 234 away from the pressure roller 232 from tilting excessively. In this way, the rotation range of the rotating arm 234 is kept within the preset range.
[0048] To achieve the pressing and flattening of the electrode tabs, in some embodiments, reference is made to... Figures 1 to 6 The rotary wheel flattening unit 24 includes a rotary wheel mounting shaft 241 and a rotary wheel 242. The rotary wheel mounting shaft 241 is set perpendicular to the corresponding rotary arm 234 and extends outward in the lateral direction. The rotary wheel 242 is fixed at the position where the corresponding rotary wheel mounting shaft 241 extends outward, and the rotary wheel 242 is set in a position that can press down the inner and outer tabs of the wound battery cell.
[0049] To facilitate the insertion of auxiliary electrodes, in some embodiments, reference is made to... Figures 1 to 5 and Figure 6The auxiliary guide plate assembly 300 includes a mounting plate 31, an adjusting plate 32, a support base 33, a rotating mounting base 34, a rotating shaft 35, and a rotating guide plate 36. The mounting plate 31 is fixed to the top of the mounting base 21. The mounting plate 31 has a groove 311 extending along its length. The protrusion 321 at the bottom of the adjusting plate 32 is embedded in the groove 311. The adjusting plate 32 is also connected to an adjusting block 38 fixed to the mounting plate 31 via an adjusting nut 37. The support base 33 is fixed to the side of the adjusting plate 32 opposite to the side connected to the adjusting nut 37. The support 33 has a locking groove 331 that passes through the support 33. The rotating mounting base 34 is located on the other side of the support 33 away from the adjusting plate 32 and is connected to the support 33 by a locking nut 39 that passes through the locking groove 331. The rotating guide plate 36 is movably connected to the rotating mounting base 34 by a rotating shaft 35 and is located on the other side of the rotating mounting base 34 away from the support 33. The adjusting nut 37 is used to adjust and move the adjusting plate 32 along the slide 311 to a set position so that the rotating guide plate 36 is placed in a set auxiliary guide plate position.
[0050] The locking nut 39 is used to lock the rotating mounting base 34 and the support base 33 after the rotating mounting base 34 is moved vertically to the set position, so that the rotating guide plate 36 is placed at the set auxiliary guide plate height.
[0051] The rotating guide plate 36 is used to rotate to a set auxiliary guide plate angle to guide the corresponding electrode plate to the winding needle located at the winding position.
[0052] It should be noted that in this embodiment, the forward / backward, up / down, and rotation adjustment positions are marked with scales indicating the adjustment positions.
[0053] Understandably, this setup allows the auxiliary wafer insertion assembly 300 to be adjusted forward, backward, up, down, and rotate, while also adding corresponding scale displays for easy adjustment, effectively ensuring the accuracy of electrode insertion.
[0054] refer to Figures 1 to 7 The following describes the working process of the electrode flattening and auxiliary sheet insertion mechanism in this application embodiment: The driving unit of the diaphragm cutting assembly 100 drives the diaphragm cutting assembly 100 to complete the action of cutting the diaphragm, and at the same time, the auxiliary sheet insertion assembly 300 also completes the action of auxiliary sheet insertion; after the winding needle completes the pre-winding of the diaphragm, the driving unit drives the diaphragm cutting assembly 100 to return to the preset waiting position, the driver 223 drives the pressure roller 232 to press the battery cell, and the rotating wheels 242 of the two rotating wheel flattening units 24 press the inner and outer electrode tabs respectively. As the diameter of the battery cell changes, the pressure roller 232 rotates around the rotating shaft under the action of the elastic member 236, thereby driving the rotating wheels 242 of the two rotating wheel flattening units 24 to rotate. After the battery cell completes the winding, the driver 223 drives the pressure roller 232 and the rotating wheel flattening unit 24 to return to the waiting position; after the battery cell completes the winding action, the same action is repeated.
[0055] This application also provides a lithium battery winding machine, including a separator cutting assembly, which is provided with the tab flattening and auxiliary sheet feeding mechanism described in the above embodiments.
[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0057] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.
Claims
1. A tab flattening and auxiliary sheet feeding mechanism, installed on a diaphragm cutting assembly (100) of a lithium battery winding machine, characterized in that, The application relates to a battery cell polar plate pushing and flattening device, which comprises a polar plate pushing and flattening assembly (200) and an auxiliary polar plate feeding assembly (300), wherein the polar plate pushing and flattening assembly (200) is arranged on a follow-up seat (11) of a diaphragm cutting assembly (100), the auxiliary polar plate feeding assembly (300) is arranged on the top of a mounting seat (21) of the polar plate pushing and flattening assembly (200), the polar plate pushing and flattening assembly (200) further comprises a transmission unit (22), a compression roller unit (23) and a rotating wheel pushing and flattening unit (24), the transmission unit (22) is arranged on the mounting seat (21), the compression roller unit (23) is arranged at the front end of the transmission unit (22), the compression roller mounting seat (231) of the compression roller unit (23) is rotationally connected with the transmission unit (22), and one rotating wheel pushing and flattening unit (24) is arranged on each lateral side of the compression roller mounting seat (231). The auxiliary polar plate feeding assembly (300) is used for moving to a preset position along with the diaphragm cutting assembly (100) and assisting in guiding corresponding polar plates into the winding needle at the winding position after the diaphragm cutting assembly (100) finishes cutting the diaphragm. After the winding needle finishes winding the diaphragm, the transmission unit (22) drives the compression roller mounting seat (231) to drive the compression roller (232) arranged at the front end of the compression roller mounting seat (231) to compress the battery cell, and drives the two rotating wheel pushing and flattening units (24) to press the inner and outer polar plates of the battery cell respectively. During the winding process of the battery cell, the compression roller mounting seat (231) is driven to rotate, the compression roller (232) is driven to rotate along with the winding battery cell, and the compression roller (232) keeps compressing the battery cell during the rotating process. The rotating wheel pushing and flattening unit (24) is used for pressing and flattening the corresponding polar plate during the rotating process of the compression roller mounting seat (231).
2. The tab push-flattening and auxiliary sheet-feeding mechanism according to claim 1, characterized by, The transmission unit (22) comprises a guide piece (221), a moving seat (222) and a driver (223), the guide piece (221) is arranged in a mounting groove (201) of the mounting seat (21) and is in transmission connection with the moving seat (222), the moving seat (222) is further in transmission connection with the driver (223) arranged on the mounting seat (21), wherein the driver (223) is used for driving the moving seat (222) to move along the guide piece (221) and driving the compression roller mounting seat (231) connected with the moving seat (222) to move towards or away from the winding needle, so as to drive the compression roller (232) to compress or release the battery cell and drive the rotating wheel pushing and flattening unit (24) to press or release the corresponding polar plate.
3. The tab push-flattening and auxiliary sheet-feeding mechanism according to claim 2, characterized by The guide piece (221) comprises a linear guide rail, and / or the driver (223) comprises one of the following: a driving air cylinder and a linear motor.
4. The tab push-flattening and auxiliary sheet-feeding mechanism according to claim 2, characterized by The mobile seat (222) is further provided with a rotating shaft support (25) near the front end of the pressing roller unit (23), the rotating shaft support (25) is rotatably connected with the two rotating arms (234) of the pressing roller mounting seat (231) through a rotating shaft (233), the lateral side of each rotating arm (234) is provided with a first anchor column (235) extending laterally, each first anchor column (235) is connected with a second anchor column (237) provided on the two sides of the rotating shaft support (25) through an elastic element (236), wherein, during the winding of the battery cell, the battery cell rotates and pushes the pressing roller (232) to drive the rotating arm (234) to rotate in the opposite direction of the winding direction of the battery cell, the elastic element (236) matches the pulling of the rotating arm (234) to rotate in the winding direction of the battery cell, so that the pressing roller mounting seat (231) drives the pressing roller (232) to rotate with the winding battery cell and keeps the battery cell pressed during the rotation.
5. The tab push-flattening and auxiliary sheet-feeding mechanism according to claim 4, characterized by The elastic element (236) comprises a tension spring.
6. The tab push-flattening and auxiliary sheet-feeding mechanism according to claim 4, wherein The two rotating arms (234) are further drivingly connected through a synchronous rotating shaft (238) provided on the inner side away from the rotating shaft (233).
7. The tab push-flattening and auxiliary sheet-feeding mechanism according to claim 4, characterized by The rotating shaft support (25) is further provided with a limiting column (239) vertically penetrating the rotating shaft support (25) and extending downward, the limiting column (239) is used for limiting the downward rotation angle of the rotating arm (234). 8.The tab pushing and auxiliary sheet feeding mechanism of claim 4, wherein, The rotating wheel flattening unit (24) comprises a rotating wheel mounting shaft (241) and a rotating wheel (242), the rotating wheel mounting shaft (241) is vertically provided corresponding to the rotating arm (234) and extends outward in the lateral direction, the rotating wheel (242) is fixedly arranged at the position where the rotating wheel mounting shaft (241) extends outward, and the rotating wheel (242) is arranged to be capable of pressing the inner and outer tabs of the winding battery cell at the arranged position.
9. The tab-flattening and secondary sheet-feeding mechanism according to any one of claims 1 to 8, characterized in that, The auxiliary sheet feeding assembly (300) comprises a mounting plate (31), an adjusting plate (32), a support base (33), a rotating mounting base (34), a rotating shaft (35) and a rotating sheet guide (36). The mounting plate (31) is fixed on the top of the mounting base (21). The mounting plate (31) is provided with a sliding groove (311) extending along the length direction thereof. The convex rib (321) on the bottom of the adjusting plate (32) is embedded in the sliding groove (311). The adjusting plate (32) is further connected with the adjusting block (38) fixed on the mounting plate (31) through the rotating adjusting nut (37). The support base (33) is fixed on the side of the adjusting plate (32) away from the rotating adjusting nut (37). The support base (33) is provided with a locking groove (331) penetrating through the support base (33). The rotating mounting base (34) is arranged on the other side of the support base (33) away from the adjusting plate (32) and is connected with the support base (33) through the locking nut (39) penetrating through and out of the locking groove (331). The rotating sheet guide (36) is movably connected with the rotating mounting base (34) through the rotating shaft (35) and is arranged on the other side of the rotating mounting base (34) away from the support base (33). The rotating adjusting nut (37) is used to rotate and drive the adjusting plate (32) to move along the sliding groove (311) to the set position, so that the rotating sheet guide (36) is placed at the set auxiliary sheet feeding position. The locking nut (39) is used to lock the rotating mounting base (34) and the support base (33) after the rotating mounting base (34) is vertically moved to the set position, so that the rotating sheet guide (36) is placed at the set auxiliary sheet feeding height. The rotating sheet guide (36) is used to rotate to the set auxiliary sheet feeding angle, so as to guide the corresponding pole piece to the winding needle at the winding position.
10. A lithium battery winder comprising a separator slitting assembly, characterized in that, The diaphragm cutting assembly is provided with the tab flattening and auxiliary sheet feeding mechanism according to any one of claims 1 to 9. The diaphragm cutting assembly is provided with the tab flattening and auxiliary sheet feeding mechanism according to any one of claims 1 to 9.