A pole piece self-shearing material replacement mechanism and method for lithium battery winding equipment

Abstract

The present invention relates to the technical field of lithium battery production, and specifically to a self-shearing material changing mechanism and method for a lithium battery winding device, comprising two glue feeding structures; a material changing unit is arranged between the two glue feeding structures, the material changing unit comprises a lifting unit for receiving a tape roller to be loaded or a tape roller to be unloaded, the upper end of the lifting unit moves in a vertical direction, a loading station and an unloading station are arranged on both sides of the lifting unit, a first linear drive is arranged horizontally on the loading station, a material removal unit for driving the tape roller to move on the support roller along the extension direction of the support roller is arranged on one side of each glue feeding structure, a top shell is arranged directly above the lifting unit, and a first driving wheel is rotatably arranged on the top shell. The present invention realizes automatic loading and unloading of the tape roller, and only one material changing unit is needed to replace the two glue feeding structures, which effectively utilizes the space and reduces the space rate.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and in particular to a pole piece self-shearing material replacement mechanism and method for lithium battery winding equipment. Background Art

[0002] Lithium batteries are divided into square cells and cylindrical cells. The cylindrical cells are made by rolling the positive electrode, separator and negative electrode together, and then need to be wrapped with tape and other coverings. In traditional lithium battery winding, materials are manually connected and replaced, which has low efficiency and low stability.

[0003] Chinese patent CN108281698B discloses an automatic pole piece material changing mechanism for lithium battery winding equipment, which includes: a left rubber feeding mechanism for feeding the left-direction tape from the material tray to the pole piece cutting position; a right rubber feeding mechanism for feeding the right-direction tape from the material tray to the pole piece cutting position; a left cutter mechanism for cutting the tape during the transfer of the tape from the material tray; a right cutter mechanism for cutting the tape during the transfer of the tape from the material tray; an upper presser for pressing the pole piece at the upper and lower positions; The upper material pressing mechanism is located at the upper end between the left and right glue feeding mechanisms, the lower material pressing mechanism is located at the lower end where the left and right glue feeding mechanisms are opposite to each other, and the residual material collecting mechanism is located at both ends above the left and right glue feeding mechanisms.

[0004] Although the above scheme realizes the alternating feeding of the left and right glue feeding structures, when the tape in the material tray is exhausted, it is necessary to manually reload the tape on the material tray. If the machine is stopped for replacement, it will easily lead to a decrease in production. If the material tray is reloaded during operation, there is a certain risk during loading due to the need for manual loading, and the workload is large. In addition, due to negligence in human operation, if the empty material tray is not loaded in time, the tape cannot be supplied continuously. Summary of the invention

[0005] In view of the above problems, a self-shearing material changing mechanism and method for a lithium battery winding device is provided. By arranging a lifting unit and a material removal unit, the tape roller arranged on the support roller can realize automatic loading and unloading of materials, and the lifting unit arranged between the two glue feeding structures effectively utilizes the space and reduces the space occupancy rate.

[0006] In order to solve the problems of the prior art, the present invention provides a pole piece self-shearing material changing mechanism for lithium battery winding equipment, comprising two glue feeding structures, each glue feeding structure comprising a horizontally arranged support roller, and the support roller supports the tape roller; a material changing unit is arranged between the two glue feeding structures, and the material changing unit comprises a lifting unit for receiving the tape roller to be loaded or the tape roller to be unloaded, and the upper end of the lifting unit moves in a vertical direction, and a loading station and a unloading station are respectively arranged on both sides of the lifting unit, and the loading station and the unloading station are both located at the lower part of the glue feeding structure A first linear drive is horizontally arranged on the loading station. When the first linear drive is started, the tape roller to be loaded at the loading station is pushed into the upper end of the lifting unit in the horizontal direction. A material removal unit is arranged on one side of each glue feeding structure for driving the tape roller to move on the supporting roller along the extension direction of the supporting roller. A top shell is arranged directly above the lifting unit. The top shell is an arc-shaped structure. The diameter of the inner wall of the top shell is the same as the outer diameter of the tape roller wrapped with the tape. The axis of the top shell is colinear with the axis of the supporting roller, and a first driving wheel is rotatably arranged on the inner wall of the top shell.

[0007] Preferably, a ventilation groove is opened along the axis of the support roller at one end of the support roller away from the material changing unit, and a pop-up block is slidably arranged along the radial direction of the support roller at one end of the ventilation groove close to the material changing unit, the pop-up block penetrates the side wall between the ventilation groove and the support roller and slides with the side wall, and an air pump is connected to one end of the ventilation groove.

[0008] Preferably, the material removal unit includes a telescopic plate that moves along the radial direction of the support roller, and a plurality of rotating second drive wheels are arranged on the telescopic plate. The second drive wheels can contact the outer periphery of the tape roller mounted on the support roller and drive the tape roller to move along the axis of the support roller. A pressure sensor is provided on the outer periphery of the second drive wheel.

[0009] Preferably, a mounting frame is horizontally arranged on the side of the telescopic plate away from the supporting roller, a pushing rod is horizontally fixedly arranged at the end of the telescopic plate facing the mounting frame, the pushing rod passes through the mounting frame and slides with the mounting frame, and a second linear drive connected to the end of the pushing rod is arranged at the end of the pushing rod away from the telescopic plate, and when the pressure sensor detects pressure, the second linear drive stops running.

[0010] Preferably, there are multiple first drive wheels, all of which can rotate bidirectionally and synchronously, and a first belt synchronization assembly connecting all the first drive wheels is provided on one side of the top shell, and a first rotation driver driving the first drive wheel is provided at the end of one of the first drive wheels.

[0011] Preferably, limiting units are arranged on both sides of the jacking unit, and the limiting units include a first limiting block and a second limiting block. The first limiting block and the second limiting block are respectively arranged at the two ends of the jacking unit facing the loading station and the unloading station. The first limiting block is fixedly arranged at the connection between the jacking unit and the unloading station, and the second limiting block is movably arranged in the horizontal direction at the connection between the jacking unit and the loading station.

[0012] Preferably, an extrusion cavity is provided in the lifting unit, a guide shell is arranged outside the second limit block along the moving direction of the second limit block, an extrusion plate is arranged inside the guide shell for movement along the extension direction of the guide shell, a first gap is provided between the extrusion plate and the second limit block, a first spring is arranged in the first gap along the extension direction of the guide shell, two ends of the first spring are fixedly connected to the extrusion plate and the second limit block respectively, and a corrugated sleeve is provided at the end of the extrusion plate and the guide shell.

[0013] Preferably, the lifting unit includes a third linear drive arranged vertically, a lifting plate is fixedly arranged on the output end of the third linear drive, an extension rod is arranged to penetrate the lifting plate in the vertical direction, the extension rod is slidably matched with the lifting plate, a trigger plate is horizontally fixedly arranged on the upper end of the extension rod, a protruding block is fixedly arranged on the upper part of the trigger plate, an air-filled bin is fixedly arranged at the lower part of the lifting plate, the lower part of the extension rod extends into the air-filled bin and slidably matches with the air-filled bin, an extrusion chamber is formed inside the air-filled bin where the extension rod is arranged, a second gap exists between the trigger plate and the lifting plate, a second spring is arranged in the second gap along the extension direction of the extension rod, two ends of the second spring are fixedly connected to the trigger plate and the lifting plate respectively, and a connecting pipe is arranged between the air-filled bin and the corrugated sleeve to connect the two.

[0014] Preferably, a material storage bin is horizontally arranged on the loading station, a material guide bin is obliquely arranged on one side of the material storage bin, a plurality of tape rollers to be loaded are arranged in the material guide bin along the oblique direction of the material guide bin, a tape roller to be loaded is stored in the material storage bin, a material discharge bin is arranged on the unloading station, the bottom of the material discharge bin is an inclined structure, and the first linear drive is arranged at the end of the material storage bin.

[0015] The present invention also relates to a pole piece self-shearing material replacement method for a lithium battery winding device, which uses a pole piece self-shearing material replacement mechanism for a lithium battery winding device, and the specific steps are as follows:

[0016] S1. Place multiple tape rolls wrapped with tape at the loading station in advance. When the tape roll in one of the adhesive feeding structures is used up, the upper end of the lifting unit rises to the highest position. The material removal unit corresponding to the adhesive feeding structure is started and pushes out the tape roll sleeved on the support roll. The tape roll is the tape roll to be unloaded.

[0017] S2, the pushed-out tape roller falls on the upper end of the jacking unit, the tape roller in the other adhesive feeding structure feeds normally, the upper end of the jacking unit drives the tape roller to descend to the lowest position, the first linear drive is started, and the first linear drive pushes the tape roller wound with tape at the loading station toward the jacking unit in the horizontal direction. The tape roller is the tape roller to be loaded, and the tape roller pushes out the tape roller to be unloaded at the upper end of the jacking unit, and the pushed-out tape roller to be unloaded enters the unloading station for discharge;

[0018] S3. The upper end of the lifting unit drives the tape roller to be loaded to rise to the highest position. At this time, the outer diameter of the tape roller is the same as the inner wall diameter of the top shell, and the first driving wheel arranged on the top shell is started. The first driving wheel pushes the tape roller toward the supporting roller. When the tape roller slides into the supporting roller, the material removal unit synchronously drives the tape roller to slide into the supporting roller. After the tape roller completely slides into the supporting roller, the automatic material change is completed.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When a tape roller to be unloaded in one of the glue feeding structures needs to be discharged, first, the upper end of the lifting unit rises to the highest position in the vertical direction, and then the material removal unit corresponding to the glue feeding structure pushes the tape roller to be unloaded set on the support roller off the support roller, and the pushed-down tape roller to be unloaded slides into the upper end of the lifting unit, and then the upper end of the lifting unit descends in the vertical direction. Then the first linear drive is started, and the first linear drive pushes a tape roller to be loaded at the loading station to the upper end of the lifting unit. When the tape roller to be loaded slides into the upper end of the lifting unit, the tape roller to be unloaded slides toward the unloading station side under the push of the tape roller to be loaded and is discharged from the unloading station, and then the upper end of the lifting unit rises to the highest position again, and the first driving wheel contacts the tape roller to be loaded and drives the tape roller to be loaded to move toward the glue feeding structure, thus completing the automatic material change, ensuring the safety of the staff, and also reducing the workload;

[0021] 2. A pop-up block is provided on the support roller. Before the tape roller to be loaded needs to be installed on the support roller or when the tape roller to be unloaded, which is sleeved on the support roller, needs to be removed from the support roller, the air pump is started and the air in the ventilation groove is discharged, so that the tape roller can slide smoothly on the support roller. When installing the tape roller to be loaded, the ventilation groove is pre-inflated by the air pump, so that the pop-up block is in a pop-up state, and will not form an obstacle to the tape roller sliding into the support roller. After the tape roller completely slides into the support roller, the pop-up block pops out and the air pump is fully inflated, so that the pop-up block stably limits the tape roller.

[0022] 3. By setting the limit unit, it is ensured that the lifting unit will not get stuck when pushing the tape roller to be loaded, and the stable operation of the material changing unit is ensured. By setting the first limit block to limit the tape roller to be loaded, when the first linear drive retracts, the tape roller to be loaded is prevented from retreating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of a pole piece self-shearing material replacement mechanism for a lithium battery winding device of the present invention;

[0024] Figure 2 The present invention is a three-dimensional schematic diagram of a self-shearing material changing mechanism for a lithium battery winding device, after removing a tape roller on a glue feeding mechanism. Figure 1 ;

[0025] Figure 3 The invention discloses a self-cutting material replacement mechanism for a lithium battery winding device. Figure 2 A local enlarged schematic diagram of the middle A;

[0026] Figure 4 The invention discloses a self-cutting material replacement mechanism for a lithium battery winding device. Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0027] Figure 5 The present invention is a three-dimensional schematic diagram of a self-shearing material changing mechanism for a lithium battery winding device, after removing a tape roller on a glue feeding mechanism. Figure 2 ;

[0028] Figure 6 It is a side view of a pole piece self-shearing material changing mechanism for a lithium battery winding device of the present invention after a tape roller on a glue feeding mechanism is removed;

[0029] Figure 7 The invention discloses a self-cutting material replacement mechanism for a lithium battery winding device. Figure 6 Schematic cross-sectional view at CC in the middle;

[0030] Figure 8 The present invention is a cutaway stereoscopic diagram of a self-shearing type material replacement mechanism for a lithium battery winding device. Figure 1 ;

[0031] Fig. 9 The invention discloses a self-cutting material replacement mechanism for a lithium battery winding device. Figure 8 A partial enlarged schematic diagram of point D in the middle;

[0032] Fig.10 The present invention is a cutaway stereoscopic diagram of a self-shearing type material replacement mechanism for a lithium battery winding device. Figure 2 ;

[0033] Fig.11 The invention discloses a self-cutting material replacement mechanism for a lithium battery winding device. Fig.10 A partial enlarged schematic diagram of point E in the middle.

[0034] The numbers in the figure are: 1, glue feeding structure; 11, tape roller; 12, support roller; 13, ventilation groove; 14, ejection block; 15, air pump; 2, material changing unit; 21, lifting unit; 211, trigger plate; 212, protruding block; 213, extension rod; 214, lifting plate; 215, charging chamber; 216, connecting pipe; 217, second spring; 218, third linear drive; 22, first linear drive; 23, material removal unit; 231, second driving wheel; 232, telescopic plate; 233 , second linear drive; 234, mounting frame; 235, pushing rod; 236, second rotary drive; 237, second belt-type synchronous assembly; 24, top shell; 241, first driving wheel; 242, first rotary drive; 243, first belt-type synchronous assembly; 25, limiting unit; 251, first limiting block; 252, second limiting block; 253, guide shell; 254, extrusion plate; 255, first spring; 256, corrugated sleeve; 3, storage bin; 31, guide bin; 4, discharge bin. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Reference Figure 1-Figure 4 and Figure 7: A self-shearing material changing mechanism for a lithium battery winding device, comprising two glue feeding structures 1, each of which comprises a horizontally arranged support roller 12, and the support roller 12 supports the tape roller 11; a material changing unit 2 is arranged between the two glue feeding structures 1, and the material changing unit 2 comprises a lifting unit 21 for receiving the tape roller 11 to be loaded or the tape roller 11 to be unloaded, and the upper end of the lifting unit 21 moves in a vertical direction, and a loading station and a unloading station are respectively arranged on both sides of the lifting unit 21, and the loading station and the unloading station are both located below the glue feeding structure 1, and a first material changing unit 2 is horizontally arranged on the loading station A linear drive 22, when the first linear drive 22 is started, the tape roller 11 to be loaded at the loading station is pushed into the upper end of the lifting unit 21 in the horizontal direction, and a material removal unit 23 is arranged on one side of each glue feeding structure 1 for driving the tape roller 11 to move on the support roller 12 along the extension direction of the support roller 12, and a top shell 24 is arranged directly above the lifting unit 21. The top shell 24 is an arc-shaped structure, and the diameter of the inner wall of the top shell 24 is the same as the outer diameter of the tape roller 11 wrapped with tape, the axis of the top shell 24 is colinear with the axis of the support roller 12, and a first driving wheel 241 is rotatably arranged on the inner wall of the top shell 24.

[0037] In the prior art, in order to ensure the normal production of lithium batteries, two glue feeding structures 1 are set to continuously supply the lithium batteries in production. However, when the existing glue feeding structure 1 is loading, it is necessary to manually load the single glue feeding structure 1 separately. During loading, the entire winding device is in a continuous operation state. The loading position is located between the two glue feeding structures 1. The loading space is narrow, and production safety accidents are very likely to occur during loading. In addition, the amount of tape wound on the tape roller 11 is limited, so the tape roller 11 on the glue feeding structure 1 needs to be replaced regularly, which is a large workload. If the staff is negligent and the speed is too slow when replacing the tape roller 11, the tape will not be supplied.

[0038] In order to avoid the above situation, a material changing unit 2 is set between the two glue feeding structures 1, which can automatically load and unload the two glue feeding structures 1. The specific structure and working principle are as follows: In this article, the tape roller 11 wrapped with tape is called the tape roller 11 to be loaded, and the used tape roller 11 is called the tape roller 11 to be unloaded. The tape roller 11 to be unloaded is not wrapped with tape. A plurality of tape rollers 11 to be loaded are arranged at the loading station, and the first linear drive 22 arranged at the loading station can only push one tape roller 11 to be loaded to the upper end of the lifting unit 21 at a time.

[0039] When a tape roller 11 to be unloaded in one of the glue feeding structures 1 needs to be discharged, first the upper end of the lifting unit 21 rises to the highest position in the vertical direction, and then the removing unit 23 corresponding to the glue feeding structure 1 pushes the tape roller 11 to be unloaded which is set on the support roller 12 off the support roller 12, and the pushed-down tape roller 11 to be unloaded slides into the upper end of the lifting unit 21, and then the upper end of the lifting unit 21 descends in the vertical direction. When the upper end of the lifting unit 21 drops to the lowest position, the first linear drive 22 is started. The first linear drive 22 is preferably a linear cylinder. The first linear drive 22 pushes a tape roller 11 to be loaded at the loading station to the upper end of the lifting unit 21. When the tape roller 11 to be loaded slides into the upper end of the lifting unit 21, the tape roller 11 to be loaded will synchronously push the tape roller 11 to be unloaded at the upper end of the lifting unit 21. The tape roller 11 to be unloaded slides toward the unloading station side under the push of the tape roller 11 to be loaded. After the tape roller 11 to be loaded completely slides into the upper end of the lifting unit 21, the tape roller 11 to be unloaded also moves from the unloading station. The workstation is discharged, and the upper end of the jacking unit 21 rises to the highest position again. The outer diameter of the tape roller 11 to be loaded at the upper end of the jacking unit 21 is the same as the inner wall diameter of the top shell 24, and the first driving wheel 241 arranged on the top shell 24 drives the tape roller 11 to be loaded to move toward the glue feeding structure 1. When the tape roller 11 to be loaded slides into the corresponding supporting roller 12 in the glue feeding structure 1, the removing unit 23 corresponding to the glue feeding structure 1 also contacts with the tape to be loaded, so that the tape to be loaded slides completely into the supporting roller 12. In this way, automatic material replacement is completed, the safety of the staff is ensured, and the workload is also reduced.

[0040] Reference Figure 3 and Figure 7 A ventilation groove 13 is provided along the axis of the support roller 12 at one end of the support roller 12 away from the material changing unit 2, and a pop-up block 14 is slidably provided along the radial direction of the support roller 12 at one end of the ventilation groove 13 close to the material changing unit 2, the pop-up block 14 penetrates the side wall between the ventilation groove 13 and the support roller 12 and slides with the side wall, and an air pump 15 is connected to one end of the ventilation groove 13.

[0041] When the tape roller 11 to be loaded is installed on the supporting roller 12, the tape roller 11 to be loaded will rotate during use. In order to prevent the tape roller 11 to be loaded from sliding off the supporting roller 12, a pop-up block 14 is provided on the supporting roller 12. Before the tape roller 11 to be loaded needs to be installed on the supporting roller 12 or when the tape roller 11 to be unloaded which is sleeved on the supporting roller 12 needs to be removed from the supporting roller 12, the air pump 15 is started and the air in the ventilation groove 13 is discharged, so that the pop-up block 14 will retract, and the tape roller 11 can slide freely on the supporting roller 12. It is worth noting that when the tape roller 11 to be loaded slides onto the support roller 12 and covers the pop-up block 14, the air pump 15 starts to pre-inflate the vent groove 13, and the pop-up block 14 pops out from the support roller 12. The pressure value of the pre-inflated vent groove 13 needs to be set according to the actual situation, and it is necessary to ensure that the pop-up block 14 will not hinder the tape roller 11 after it is popped out. After the tape roller 11 slides in completely, the pop-up block 14 pops out automatically. At this time, the air pump 15 fully inflates the vent groove 13, ensuring that the pop-up block 14 stably limits the tape roller 11.

[0042] Reference Figure 3 The material removal unit 23 includes a telescopic plate 232 that moves along the radial direction of the support roller 12, and a plurality of rotating second driving wheels 231 are arranged on the telescopic plate 232. The second driving wheel 231 can contact the outer periphery of the tape roller 11 mounted on the support roller 12 and drive the tape roller 11 to move along the axis of the support roller 12. A pressure sensor is arranged on the outer periphery of the second driving wheel 231.

[0043] When the tape roller 11 is in use, the tape roller 11 rotates around its own axis. At this time, the second driving wheel 231 does not contact the outer periphery of the tape roller 11. When the tape wound on the tape roller 11 is used up, the telescopic plate 232 approaches the tape roller 11 along the radial direction of the support roller 12. After the second driving wheel 231 contacts the tape roller 11, the pressure sensor detects the pressure, and the telescopic plate 232 stops moving. The second driving wheel 231 starts to rotate, and the second driving wheel 231 pushes the tape roller 11 to be unloaded from the support roller 12. When loading the support roller 12, the telescopic plate 232 drives the second driving wheel 231 to move to the farthest position from the support roller 12. At this time, the tape roller 11 to be loaded will not be hindered by the second driving wheel 231 when moving onto the support roller 12. In the process of the tape roller 11 to be loaded sliding into the support roller 12, the telescopic plate 232 will drive the second driving wheel 231 to approach the support roller 12 again, and stop moving when the second driving wheel 231 contacts the outer periphery of the tape roller 11 to be loaded, and then the second driving wheel 231 rotates, so that the tape roller 11 to be loaded slides completely into the support roller 12.

[0044] It is worth noting that the rotation direction of the second driving wheel 231 when driving the tape roller 11 to be unloaded is opposite to the rotation direction of the second driving wheel 231 when driving the tape roller 11 to be loaded.

[0045] Reference Figure 2-Figure 4 A mounting frame 234 is horizontally arranged on the side of the telescopic plate 232 away from the support roller 12, and a pushing rod 235 is horizontally fixedly arranged at the end of the telescopic plate 232 facing the mounting frame 234. The pushing rod 235 passes through the mounting frame 234 and slides with the mounting frame 234. A second linear drive 233 connected to the end of the pushing rod 235 is arranged at the end of the pushing rod 235 away from the telescopic plate 232. When the pressure sensor detects pressure, the second linear drive 233 stops running.

[0046] The second linear drive 233 is preferably a linear cylinder.

[0047] Reference Figure 3-Figure 5 : A plurality of first driving wheels 241 are provided, and all the first driving wheels 241 can rotate bidirectionally and synchronously. A first belt synchronization assembly 243 connecting all the first driving wheels 241 is provided on one side of the top shell 24, and a first rotating driver 242 for driving the first driving wheel 241 is provided at the end of one of the first driving wheels 241.

[0048] A second belt-type synchronous assembly 237 connecting all the second driving wheels 231 is arranged on the telescopic plate 232, and a second rotation driver 236 for driving the second driving wheel 231 is arranged at the end of one of the second driving wheels 231. The first rotation driver 242 and the second rotation driver 236 are preferably servo motors. The first belt-type synchronous assembly 243 and the second belt-type synchronous assembly 237 are both composed of a synchronous belt and a synchronous wheel. Since the first belt-type synchronous assembly 243 and the second belt-type synchronous assembly 237 are prior art, they are not described in detail here.

[0049] Reference Figure 7 and Figure 8 : Limiting units 25 are arranged on both sides of the jacking unit 21, and the limiting units 25 include a first limiting block 251 and a second limiting block 252. The first limiting block 251 and the second limiting block 252 are respectively arranged at the two ends of the jacking unit 21 facing the loading station and the unloading station. The first limiting block 251 is fixedly arranged at the connection between the jacking unit 21 and the unloading station, and the second limiting block 252 is arranged at the connection between the jacking unit 21 and the loading station for movement along the horizontal direction.

[0050] Reference Fig.11: There is an extrusion cavity in the lifting unit 21, and a guide shell 253 is arranged outside the second limit block 252 along the moving direction of the second limit block 252, and an extrusion plate 254 is arranged inside the guide shell 253 to move along the extension direction of the guide shell 253, and there is a first gap between the extrusion plate 254 and the second limit block 252, and a first spring 255 is arranged in the first gap along the extension direction of the guide shell 253, and both ends of the first spring 255 are fixedly connected to the extrusion plate 254 and the second limit block 252 respectively, and a corrugated sleeve 256 is arranged at the end of the extrusion plate 254 and the guide shell 253.

[0051] Reference Figure 8-Figure 10 The lifting unit 21 includes a third linear drive 218 arranged vertically, a lifting plate 214 is fixedly arranged on the output end of the third linear drive 218, an extension rod 213 is vertically penetrated on the lifting plate 214, the extension rod 213 is slidably matched with the lifting plate 214, a trigger plate 211 is horizontally fixedly arranged on the upper end of the extension rod 213, a protruding block 212 is fixedly arranged on the upper part of the trigger plate 211, an air filling chamber 215 is fixedly arranged on the lower part of the lifting plate 214, and the extension rod 213 is fixedly arranged on the upper end of the extension rod 213. The lower part of 13 extends into the air chamber 215 and slides with the air chamber 215, and an extrusion chamber is formed inside the air chamber 215 provided with an extension rod 213. A second gap exists between the trigger plate 211 and the lifting plate 214. A second spring 217 is provided in the second gap along the extension direction of the extension rod 213. The two ends of the second spring 217 are fixedly connected to the trigger plate 211 and the lifting plate 214 respectively. A connecting pipe 216 is provided between the air chamber 215 and the bellows sleeve 256 to connect the two.

[0052] The third linear drive 218 is preferably a linear cylinder. When the tape roller 11 to be loaded is pushed from the loading station to the upper end of the lifting unit 21, due to the limited space between the two glue feeding structures 1, it is necessary to limit the tape roller 11 to be loaded that is moved to the upper end of the lifting unit 21, and make the second limit block 252 move in the horizontal direction, which facilitates the smooth movement of the tape roller 11 to be loaded. That is, when the tape roller 11 to be loaded passes through the second limit block 252, the second limit block 252 is in a retracted state. After the tape roller 11 to be loaded passes through the second limit block 252, the second limit block 252 pops out and limits the end of the tape roller 11 to be loaded. At this time, the two ends of the tape roller 11 to be loaded are respectively limited by the first limit block 251 and the second limit block 252. The purpose of setting the second limit block 252 is because the end of the tape roller 11 wrapped with tape has a certain viscosity. If only the first limit block 251 is set to limit the tape roller 11 to be loaded, when the first linear drive 22 retracts, the tape roller 11 to be loaded will retreat. In this way, when the lifting unit 21 is lifted, the tape roller 11 to be loaded will be squeezed due to misalignment, resulting in the material changing unit 2 being unable to work normally.

[0053] The specific working principle of the second limit block 252 is as follows: when the tape roller 11 to be loaded is pushed from the loading station to the upper part of the lifting unit 21, the second limit block 252 is in a retracted state. When the tape roller 11 to be loaded enters the upper part of the lifting unit 21, it first enters the upper part of the trigger plate 211. As the tape roller 11 to be loaded continues to move, the end of the tape roller 11 to be loaded slides to the raised block 212 and presses the raised block 212 downward. At this time, the second spring 217 between the trigger plate 211 and the lifting plate 214 is squeezed, and the extension rod 213 slides into the air filling chamber 215. The air in the air filling chamber 215 flows into the corrugated sleeve 256 through the connecting pipe 216, so that the squeezing plate 25 The first spring 255 is squeezed. Since the tape roller 11 to be loaded is located at the front end of the second limit block 252 at this time, the second limit block 252 cannot be ejected normally. When the tape roller 11 to be loaded completely passes through the second limit block 252, the second limit block 252 is ejected under the elastic force of the first spring 255. The second limit block 252 limits the tape roller 11 to be loaded, thereby ensuring that the output end of the first linear drive 22 will not drive the tape roller 11 to be loaded to retreat when retracting.

[0054] Then, the third linear drive 218 lifts the lifting plate 214, so that the lifting plate 214 drives the trigger plate 211 to rise through the second spring 217. When the tape roller 11 to be loaded on the trigger plate 211 rises to the highest position, the third linear drive 218 stops running. After the first driving wheel 241 moves the tape roller 11 to be loaded out from the upper part of the trigger plate 211, the second spring 217 recovers and the second limit block 252 retracts. In this way, when the first linear drive 22 pushes the new tape roller 11 to be loaded to move again, the second limit block 252 will not hinder the new tape roller 11 to be loaded.

[0055] Reference Figure 5-Figure 7 A material storage bin 3 is horizontally arranged on the loading station, a material guide bin 31 is obliquely arranged on one side of the material storage bin 3, a plurality of tape rollers 11 to be loaded are arranged in the material guide bin 31 along the oblique direction of the material guide bin 31, a tape roller 11 to be loaded is stored in the material storage bin 3, a material discharge bin 4 is arranged on the unloading station, the bottom of the material discharge bin 4 is an inclined structure, and a first linear drive 22 is arranged at the end of the material storage bin 3.

[0056] When the first linear drive 22 is started, the first linear drive 22 drives the tape roller 11 to be loaded in the storage bin 3 to move toward the upper end of the lifting unit 21, and the tape roller 11 to be unloaded at the upper end of the lifting unit 21 is pushed toward the discharge bin 4 by the tape roller 11 to be loaded that slides in, thereby completing the discharge.

[0057] Reference Figure 1-Figure 11The present invention also relates to a self-shearing material replacement method for a lithium battery winding device, which uses a self-shearing material replacement mechanism for a lithium battery winding device, and the specific steps are as follows:

[0058] S1. Place multiple tape rolls 11 wrapped with tape at the loading station in advance. When the tape roll 11 in one of the adhesive feeding structures 1 is used, the upper end of the lifting unit 21 rises to the highest position. The material removal unit 23 corresponding to the adhesive feeding structure 1 is started and pushes out the tape roll 11 sleeved on the support roll 12. The tape roll 11 is the tape roll 11 to be unloaded.

[0059] S2, the pushed-out tape roller 11 falls on the upper end of the jacking unit 21, the tape roller 11 in the other adhesive feeding structure 1 performs normal feeding, the upper end of the jacking unit 21 drives the tape roller 11 to descend to the lowest position, the first linear drive 22 is started, and the first linear drive 22 pushes the tape roller 11 wound with tape at the loading station toward the jacking unit 21 in the horizontal direction. The tape roller 11 is the tape roller 11 to be loaded, and the tape roller 11 pushes out the tape roller 11 to be unloaded at the upper end of the jacking unit 21, and the pushed-out tape roller 11 to be unloaded enters the unloading station for discharge;

[0060] S3. The upper end of the lifting unit 21 drives the tape roller 11 to be loaded to rise to the highest position. At this time, the outer diameter of the tape roller 11 is the same as the inner wall diameter of the top shell 24, and the first driving wheel 241 arranged on the top shell 24 is started. The first driving wheel 241 pushes the tape roller 11 toward the supporting roller 12. When the tape roller 11 slides into the supporting roller 12, the material removal unit 23 synchronously drives the tape roller 11 to slide into the supporting roller 12. After the tape roller 11 completely slides into the supporting roller 12, the automatic material change is completed.

[0061] Working principle: When a tape roller 11 to be unloaded in one of the glue feeding structures 1 needs to be discharged, first the upper end of the lifting unit 21 rises to the highest position in the vertical direction, and then the removal unit 23 corresponding to the glue feeding structure 1 pushes the tape roller 11 to be unloaded which is set on the support roller 12 off the support roller 12, and the pushed-down tape roller 11 to be unloaded slides into the upper end of the lifting unit 21, and then the upper end of the lifting unit 21 descends in the vertical direction. When the upper end of the lifting unit 21 drops to the lowest position, the first linear drive 22 is started, and the first linear drive 22 pushes a tape roller 11 to be loaded at the loading station to the upper end of the lifting unit 21. When the tape roller 11 to be loaded slides into the upper end of the lifting unit 21, the tape roller 11 to be loaded will synchronously push the tape roller 11 to be unloaded at the upper end of the lifting unit 21. The tape roller 11 to be unloaded slides toward the unloading station side under the push of the tape roller 11 to be loaded. After the tape to be loaded completely slides into the upper end of the lifting unit 21, the tape roller 11 to be unloaded is also discharged from the unloading station. At this time, the lifting unit The upper end of 21 rises to the highest position again, and the outer diameter of the tape roller 11 to be loaded located at the upper end of the jacking unit 21 is the same as the inner wall diameter of the top shell 24, and the first driving wheel 241 arranged on the top shell 24 drives the tape roller 11 to be loaded to move toward the glue feeding structure 1. When the tape roller 11 to be loaded slides into the corresponding supporting roller 12 in the glue feeding structure 1, the material removal unit 23 corresponding to the glue feeding structure 1 also contacts with the tape to be loaded, so that the tape to be loaded completely slides into the supporting roller 12. In this way, automatic material replacement is completed, the safety of the staff is ensured, and the workload is also reduced.

[0062] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A pole piece self-shearing material changing mechanism for a lithium battery winding device, comprising two glue feeding structures (1), each glue feeding structure (1) comprising a horizontally arranged support roller (12), the support roller (12) supporting the tape roller (11); characterized in that: A material changing unit (2) is arranged between the two glue feeding structures (1), and the material changing unit (2) comprises a lifting unit (21) for receiving a tape roller (11) to be loaded or a tape roller (11) to be unloaded, and the upper end of the lifting unit (21) moves in a vertical direction, and a loading station and a unloading station are respectively arranged on both sides of the lifting unit (21), and the loading station and the unloading station are both located below the glue feeding structure (1), and a first linear drive (22) is horizontally arranged on the loading station, and when the first linear drive (22) is started, the tape roller (11) to be loaded at the loading station is pushed into the upper end of the lifting unit (21) in a horizontal direction, and at each glue feeding structure (1), A material removal unit (23) is provided on one side for driving the tape roller (11) to move on the support roller (12) along the extension direction of the support roller (12); a top shell (24) is provided directly above the lifting unit (21); the top shell (24) is an arc-shaped structure; the diameter of the inner wall of the top shell (24) is the same as the outer diameter of the tape roller (11) wound with the tape; the axis of the top shell (24) is colinear with the axis of the support roller (12); and a first driving wheel (241) is rotatably provided on the inner wall of the top shell (24); a ventilation groove (13) is provided along the axis of the support roller (12) at one end of the support roller (12) away from the material changing unit (2); and a ventilation groove (13) is provided near the material changing unit. An ejection block (14) is provided at one end of the lifting unit (2) so as to slide along the radial direction of the support roller (12), the ejection block (14) penetrates the side wall between the ventilation groove (13) and the support roller (12) and slides with the side wall, and an air pump (15) is connected to one end of the ventilation groove (13); a limiting unit (25) is provided on both sides of the lifting unit (21), the limiting unit (25) comprises a first limiting block (251) and a second limiting block (252), the first limiting block (251) is fixedly provided at the connection between the lifting unit (21) and the unloading station, and the second limiting block (252) is movably provided at the connection between the lifting unit (21) and the loading station in the horizontal direction; the lifting unit The element (21) contains an extrusion cavity, a guide shell (253) is arranged outside the second limit block (252) along the moving direction of the second limit block (252), an extrusion plate (254) is arranged inside the guide shell (253) along the extension direction of the guide shell (253), a first gap exists between the extrusion plate (254) and the second limit block (252), a first spring (255) whose two ends are respectively fixedly connected to the extrusion plate (254) and the second limit block (252) is arranged in the first gap along the extension direction of the guide shell (253), and a corrugated sleeve (256) connected to the extrusion cavity is arranged between the extrusion plate (254) and the end of the guide shell (253);The lifting unit (21) comprises a trigger plate (211) that moves in a vertical direction, a protrusion (212) is fixedly provided on the upper part of the trigger plate (211), a lifting plate (214) is provided below the trigger plate (211) and moves in a vertical direction, an extension rod (213) is provided on the lifting plate (214) to penetrate in a vertical direction, the extension rod (213) and the lifting plate (214) are slidably matched, the trigger plate (211) is fixedly provided horizontally on the upper end of the extension rod (213), an air filling chamber (215) is fixedly provided at the lower part of the lifting plate (214), the lower part of the extension rod (213) extends into the air filling chamber (215) and is slidably matched with the air filling chamber (215), and an extrusion chamber is formed inside the air filling chamber (215) provided with the extension rod (213). ; 2. The electrode self-shearing material changing mechanism for lithium battery winding equipment according to claim 1, characterized in that: The material removal unit (23) comprises a telescopic plate (232) that moves along the radial direction of the support roller (12); a plurality of rotating second drive wheels (231) are arranged on the telescopic plate (232); the second drive wheels (231) are capable of contacting the outer periphery of a tape roller (11) sleeved on the support roller (12) and driving the tape roller (11) to move along the axis of the support roller (12); and a pressure sensor is arranged on the outer periphery of the second drive wheel (231).

3. The electrode self-shearing material changing mechanism for lithium battery winding equipment according to claim 2, characterized in that: A second linear drive (233) for driving the telescopic plate (232) to move is provided on one side of the telescopic plate (232); when the pressure sensor detects pressure, the second linear drive (233) stops running.

4. The electrode self-shearing material changing mechanism for lithium battery winding equipment according to claim 1, characterized in that: A plurality of first drive wheels (241) are provided, and all the first drive wheels (241) can rotate bidirectionally and synchronously. A first belt-type synchronous assembly (243) connecting all the first drive wheels (241) is provided on one side of the top shell (24), and a first rotation driver (242) for driving the first drive wheel (241) is provided at the end of one of the first drive wheels (241).

5. The electrode self-shearing material changing mechanism for lithium battery winding equipment according to claim 1, characterized in that: A material storage bin (3) is horizontally arranged on the loading station, a material guide bin (31) is obliquely arranged on one side of the material storage bin (3), and a plurality of tape rollers (11) to be loaded are arranged in the material guide bin (31) along the oblique direction of the material guide bin (31).

6. A method for replacing a pole piece by self-shearing for a lithium battery winding device, using a pole piece self-shearing for a lithium battery winding device as claimed in any one of claims 1 to 5, characterized in that: The specific steps are as follows: S1. A plurality of tape rollers (11) wound with tape are pre-placed at a loading station. When the tape roller (11) in one of the adhesive feeding structures (1) is used, the upper end of the lifting unit (21) rises to the highest position. The material removal unit (23) corresponding to the adhesive feeding structure (1) is started and the tape roller (11) sleeved on the support roller (12) is pushed out. The tape roller (11) is the tape roller (11) to be unloaded. S2, the pushed-out tape roller (11) falls on the upper end of the lifting unit (21), the tape roller (11) in the other adhesive feeding structure (1) performs normal feeding, the upper end of the lifting unit (21) drives the tape roller (11) to descend to the lowest position, the first linear drive (22) is started, and the first linear drive (22) pushes the tape roller (11) wound with tape at the loading station toward the lifting unit (21) in the horizontal direction, the tape roller (11) being the tape roller (11) to be loaded, the tape roller (11) pushes out the tape roller (11) to be unloaded at the upper end of the lifting unit (21), and the pushed-out tape roller (11) to be unloaded enters the unloading station and is discharged; S3, the upper end of the lifting unit (21) drives the tape roller (11) to be loaded to rise to the highest position, at which time the outer diameter of the tape roller (11) is the same as the inner wall diameter of the top shell (24), and the first driving wheel (241) arranged on the top shell (24) is started, and the first driving wheel (241) pushes the tape roller (11) toward the support roller (12). When the tape roller (11) slides into the support roller (12), the material removal unit (23) synchronously drives the tape roller (11) to slide into the support roller (12), and the automatic material change is completed after the tape roller (11) completely slides into the support roller (12).

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