A lithium battery separator cutting and winding device

Abstract

The present invention discloses a lithium battery separator cutting and winding device, including a housing, and further including: a winding assembly, the winding assembly is disposed inside the housing, the winding assembly is mainly composed of a circular tube, an adjusting tube and two winding rollers, and the circular tube and the adjusting tube are relatively rotatably installed inside the housing, the two winding rollers are relatively disposed on the upper and lower sides of the adjusting tube, and the winding roller is mainly composed of a plurality of inner tubes, a plurality of outer sleeves and two outer tubes. When the improved lithium battery separator cutting and winding device is in use, after the lithium battery separator wound on the winding roller reaches the corresponding amount, the cutting operation of the lithium battery separator can be automatically completed, and the position of the end of the lithium battery separator can be adjusted so that the lithium battery separator is wound onto another winding roller, so that when the discharging operation of the lithium battery separator is carried out, the device does not need to be stopped, and the winding efficiency of the lithium battery separator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery separator winding equipment, and particularly relates to a lithium battery separator cutting and winding equipment. Background Art

[0002] The lithium battery separator is one of the key inner components of a lithium battery, serving as a separator for the positive and negative active materials. During the production of lithium battery separators, they are generally stored in a wound manner. Through a cutting and winding device, a lithium battery separator with a suitable length and width is wound into a lithium battery separator roll to facilitate the use of the lithium battery separator.

[0003] During the use of existing lithium battery separator cutting and winding equipment, the lithium battery separator is cut into the required width by a slitting device, and then the cut lithium battery separator is wound around a winding roller by a rotating winding roller. After the lithium battery separator on the winding roller reaches a predetermined amount, the operator often needs to stop the machine to complete the unloading operation of the lithium battery separator, reducing the winding efficiency of the lithium battery separator. Moreover, when unloading the lithium battery separator, the operator often needs to disassemble the winding roller, and there are often multiple lithium battery separator rolls wound around the winding roller. The operator needs to pull the lithium battery separator roll off a long winding roller, which is rather troublesome and increases the labor intensity of the operator. Summary of the Invention

[0004] The purpose of the present invention is to provide a lithium battery separator cutting and winding equipment to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A lithium battery separator cutting and winding equipment, including a housing, further including:

[0006] A winding assembly, the winding assembly is arranged inside the housing. The winding assembly is mainly composed of a circular tube, an adjusting tube, and two winding rollers. The circular tube and the adjusting tube are relatively rotatably arranged inside the housing. The two winding rollers are relatively arranged on the upper and lower sides of the adjusting tube. The winding roller is mainly composed of a plurality of inner tubes, a plurality of sleeves, and two outer tubes. The two outer tubes are oppositely arranged, and a plurality of inner tubes are arranged between the corresponding two outer tubes. The outer tube is fixedly connected to the corresponding inner tube, and adjacent two inner tubes are connected by a connecting mechanism. The sleeve is slidably sleeved on the outer peripheral side of the corresponding inner tube. A plurality of second adsorption holes are circumferentially and arrayedly formed on the tube wall of the sleeve and the tube wall of the inner tube. A plurality of first adsorption holes are circumferentially and arrayedly formed on the outer peripheral wall of the circular tube;

[0007] Two adjusting components, the two adjusting components are relatively arranged on the upper and lower sides of the two winding rollers. The adjusting component adjusts the vertical position of the inner tube;

[0008] Cutting assembly, the cutting assembly is arranged on the circular tube, and the cutting assembly cuts the lithium battery separator;

[0009] Two driving air extraction assemblies, the driving air extraction assemblies are arranged on the outer peripheral sides of the two winding rollers, and the driving air extraction assemblies drive the circular tube, the adjusting tube and the two winding rollers to rotate, and continuously extract the gas inside the circular tube, inside the adjusting tube and inside the two winding rollers.

[0010] Preferably, the outer peripheral wall of the circular tube is in clearance fit with the outer peripheral wall of the adjusting tube. A number of limiting strips are fixedly arranged on the outer peripheral wall of the inner tube in a circumferential array, and each limiting strip is slidably inserted into the tube wall of the corresponding sleeve.

[0011] Preferably, a guiding groove is formed in the outer wall of the housing at the position corresponding to the outer tube, and the outer tube penetrates through the corresponding guiding groove and is in contact with the inner wall of the corresponding guiding groove.

[0012] Preferably, the connecting mechanism includes a limiting tube. One end of the limiting tube is arranged in a square tube shape, and the outer ring edge of one end of the limiting tube is in an arc shape. The other end of the limiting tube is arranged in a circular tube shape. The limiting tube is slidably arranged in the opening at one end of the corresponding inner tube. A limiting groove is formed in the other side of the inner tube, and the arc-shaped end of the limiting tube is inserted into the corresponding limiting groove and is in contact with the inner wall of the corresponding limiting groove. A first spring is arranged between the limiting tube and the inner wall of the corresponding inner tube, and the two ends of the first spring are respectively connected to the inner wall of the corresponding inner tube and the corresponding limiting tube.

[0013] Preferably, the cutting assembly includes a cutter. A storage hole is formed in the outer peripheral wall of the circular tube, and the inside of the storage hole is communicated with the inside of the circular tube. The cutter is slidably arranged in the storage hole. A first piston plate is fixedly arranged at the back end of the cutter, and the outer peripheral wall of the first piston plate is in contact with the inner wall of the storage hole. An electric control valve is rotatably arranged at the opening end of the circular tube.

[0014] Preferably, the adjusting assembly includes a number of support plates. One end of each support plate is rotatably sleeved on the outer peripheral side of the corresponding inner tube through a bearing. Two fixing blocks are relatively fixedly arranged in the housing through bolts. A storage groove is formed in each fixing block, and the other end of the support plate is inserted into the corresponding storage groove. A second piston plate is fixedly arranged at the other end of the support plate, and the outer peripheral wall of the second piston plate is in contact with the inner wall of the corresponding storage groove. An air pump is fixedly arranged in the storage groove, and the exhaust end of the air pump extends outside the corresponding fixing block. Two second springs are oppositely arranged between the second piston plate and the inner wall of the corresponding storage groove, and the two ends of each second spring are respectively fixedly connected to the corresponding second piston plate and the inner wall of the corresponding storage groove.

[0015] Preferably, a pressure limiting valve is fixedly arranged on one side of the fixing block away from the air pump, and the air inlet end of the pressure limiting valve is inserted into the corresponding storage groove.

[0016] Preferably, a plurality of first limit blocks and a plurality of second limit blocks are respectively and fixedly installed at positions corresponding to the second piston plate in the storage tank, and both the first limit blocks and the second limit blocks are located between corresponding two second springs. The second limit blocks are located between corresponding two first limit blocks, and the length of the second limit blocks is greater than the length of the first limit blocks.

[0017] Preferably, the driving air extraction assembly includes a protective shell. Two protective shells are relatively and fixedly installed on the outer wall of the outer shell at positions corresponding to the circular tube and the adjusting tube, and the interiors of both protective shells are communicated with the interior of the adjusting tube. Two soft tubes are communicatively installed on the upper and lower sides of the protective shell, and the air inlet ends of each soft tube are inserted into the corresponding outer tube and rotatably connected to the corresponding outer tube. The two ends of the circular tube rotatably penetrate through the shell wall of the protective shell. Outer tooth rings are fixedly sleeved at both ends of the circular tube and both ends of the adjusting tube, and two adjacent outer tooth rings are meshed and connected. The outer tooth rings are located in the corresponding protective shells. A motor is fixedly installed on the inner side wall of the outer shell, and a driving gear is fixedly installed at the driving end of the motor. The driving gear is meshed with the corresponding outer tooth ring. Two drivers are oppositely arranged inside the outer shell, and the shell wall of the driver is fixedly connected to the corresponding support plate. The driving toothed ring of the driver is fixedly sleeved on the outer peripheral side of the corresponding outer tube.

[0018] Preferably, two exhaust pipes are relatively and fixedly penetrated through the side wall of the protective shell. A transmission gear is rotatably installed on the outer wall of the outer shell at a position corresponding to the exhaust pipe, and the transmission gear is meshed with the corresponding outer tooth ring. An impeller is arranged inside the exhaust pipe, and the impeller is fixedly connected to the corresponding transmission gear. The impeller is in clearance fit with the inner wall of the corresponding exhaust pipe.

[0019] The present invention has at least the following beneficial effects:

[0020] 1. When the improved lithium battery separator cutting and winding equipment is in use, after the lithium battery separator wound on the winding roller reaches the corresponding amount, the cutting operation of the lithium battery separator can be automatically completed, and the position of the end of the lithium battery separator can be adjusted, so that the lithium battery separator is wound onto another winding roller, so that when the unloading operation of the lithium battery separator is carried out, it is not necessary to stop the device, improving the winding efficiency of the lithium battery separator;

[0021] 2. After the cutting operation of the above lithium battery separator is completed, with the adjustment of the position of the winding roller by the adjustment mechanism, the lithium battery separator on the winding roller is separated from the lithium battery separator on the adjustment tube, avoiding the influence of the lithium battery separator on the winding roller on the winding operation of the lithium battery separator on the adjustment tube. Subsequently, the winding roller is automatically split into several parts, and several inner tubes are misaligned. At this time, the operator can directly complete the discharging operation of the lithium battery separator by pulling out the sleeve on the inner tube, which facilitates the discharging process of the device and reduces the labor intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Front view of the overall structure of the present invention;

[0024] Figure 2 Stereogram of the overall structure of the present invention;

[0025] Figure 3 Stereogram of the fixed block, circular tube, adjustment tube and winding roller of the present invention;

[0026] Figure 4 For the present invention Figure 3 Stereogram after rotating counterclockwise by 180 degrees;

[0027] Figure 5 For the present invention Figure 4 Stereogram of the circular tube, adjustment tube and winding roller in the present invention;

[0028] Figure 6 Stereogram of the internal structure of the circular tube, adjustment tube and winding roller of the present invention;

[0029] Figure 7 Stereogram of some support plates, inner tubes, outer tubes and sleeves of the present invention;

[0030] Figure 8 Front view of the internal structure of the circular tube of the present invention;

[0031] Figure 9 Stereogram of the internal structure of the fixed block of the present invention;

[0032] Figure 10 Stereogram of the external gear ring, driving gear and gear ring of the present invention.

[0033] In the figure: 1. Outer shell; 2. Winding assembly; 21. Circular tube; 22. Adjusting tube; 23. Winding roller; 231. Inner tube; 232. Sleeve tube; 233. Outer tube; 234. Limit strip; 24. Connecting mechanism; 241. Limit tube; 242. Limit groove; 243. First spring; 25. First adsorption hole; 26. Second adsorption hole; 27. Guide groove; 3. Cutting assembly; 31. Storage hole; 32. Cutter; 33. First piston plate; 34. Electric control valve; 4. Adjusting assembly; 41. Support plate; 42. Fixed block; 43. Storage tank; 44. Second piston plate; 45. Air pump; 46. Second spring; 47. Pressure limiting valve; 48. First limit block; 49. Second limit block; 5. Driving air extraction assembly; 51. Protective shell; 52. Soft tube; 53. External gear ring; 54. Motor; 55. Driving gear; 56. Driver; 57. Exhaust pipe; 58. Transmission gear; 59. Impeller. Detailed implementation mode

[0034] In order to make the technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The present invention provides a technical solution: Refer to Figure 1 - Figure 8 , a lithium battery separator cutting and winding device disclosed by the present invention includes an outer shell 1, and further includes:

[0036] A winding assembly 2, the winding assembly 2 is arranged inside the outer shell 1. The winding assembly 2 is mainly composed of a circular tube 21, an adjusting tube 22 and two winding rollers 23. The circular tube 21 and the adjusting tube 22 are relatively rotatably arranged inside the outer shell 1. The two winding rollers 23 are relatively arranged on the upper and lower sides of the adjusting tube 22. The winding roller 23 is mainly composed of a plurality of inner tubes 231, a plurality of sleeve tubes 232 and two outer tubes 233. The two outer tubes 233 are relatively arranged, and a plurality of inner tubes 231 are arranged between the corresponding two outer tubes 233. The outer tube 233 is fixedly connected to the corresponding inner tube 231, and adjacent two inner tubes 231 are connected by a connecting mechanism 24. The sleeve tube 232 is slidably sleeved on the outer peripheral side of the corresponding inner tube 231. A plurality of second adsorption holes 26 are jointly arranged in a circumferential array on the tube wall of the sleeve tube 232 and the tube wall of the inner tube 231. A plurality of first adsorption holes 25 are arranged in a circumferential array on the outer peripheral wall of the circular tube 21;

[0037] Two adjusting assemblies 4, the two adjusting assemblies 4 are relatively arranged on the upper and lower sides of the two winding rollers 23. The adjusting assembly 4 adjusts the vertical position of the inner tube 231;

[0038] A cutting assembly 3, the cutting assembly 3 is arranged on the circular tube 21, and the cutting assembly 3 cuts the lithium battery separator;

[0039] Two driving air extraction assemblies 5 are provided on the outer peripheral sides of the two winding rollers 23. The driving air extraction assemblies 5 drive the circular tube 21, the adjusting tube 22 and the two winding rollers 23 to rotate, and continuously extract the gas inside the circular tube 21, the adjusting tube 22 and the two winding rollers 23.

[0040] In this embodiment, it should be noted that a slitting device is installed in the feed inlet of the above-mentioned housing 1 to slit the lithium battery separator into several parts of equal width. According to Figure 5 As shown, the density of the second adsorption holes 26 on the above-mentioned winding roller 23 is higher than that of the first adsorption holes 25 on the circular tube 21.

[0041] When the improved lithium battery separator cutting and winding equipment is in use, according to Figure 2 As shown, the slitting device slits the lithium battery separator into several lithium battery separators of equal length, and pushes the slit lithium battery separator into the positioning mechanism of the slitting device. Thus, the end of the slit lithium battery separator moves from the corresponding position inside the housing 1 to the top side of the round rod. According to Figure 2-6 As shown, the driving mechanism drives the circular tube 21, the adjusting tube 22 and the winding roller 23 to rotate at a constant speed, and continuously extracts the gas inside the circular tube 21, the adjusting tube 22 and the winding roller 23, so that a negative pressure cavity is continuously formed inside the circular tube 21, the adjusting tube 22 and the winding roller 23. At the same time, the outside air continuously flows into the circular tube 21 and the winding roller 23 from the first adsorption holes 25 and the second adsorption holes 26 to supplement the lost gas inside the circular tube 21 and the winding roller 23.

[0042] During the process of the circular tube 21 and the adjusting tube 22 rotating towards each other, the friction between the rotating circular tube 21 and the end of the lithium battery separator, combined with the self-gravity of the end of the lithium battery separator, sends the end of the lithium battery separator into the gap between the end of the circular tube 21 and the adjusting tube 22. Furthermore, the end of the lithium battery separator is attached to the adjusting tube 22. At this time, due to the blockage of the first adsorption holes 25 by the lithium battery separator, an adsorption force can be applied between the lithium battery separator and the adjusting tube 22, so that the end of the lithium battery separator is attached to the adjusting tube 22. As the adjusting tube 22 rotates, the end of the lithium battery separator makes a circular motion around the adjusting tube 22. Furthermore, the end of the lithium battery separator can be directly sent into the gap between the adjusting tube 22 and the bottom winding roller 23. At this time, due to the blockage of the second adsorption holes 26 by the lithium battery separator, a stronger adsorption force can be formed between the end of the lithium battery separator and the winding roller 23, so that the end of the lithium battery separator is separated from the adjusting roller, and the lithium battery separator is attached to the winding roller 23 and rotates with the winding roller 23, winding the lithium battery separator around the sleeve 232.

[0043] According to Figure 3 and Figure 5As shown in the figure, when the winding roller 23 winds the lithium battery separator, the adjusting assembly 4 synchronously adjusts the position of the winding roller 23, so that the distance between the winding roller 23 and the adjusting tube 22 gradually increases, automatically leaving space for the lithium battery separator to wind around the sleeve 232. After the winding amount of the lithium battery separator on the bottom winding roller 23 reaches the threshold, the cutting assembly 3 is activated to cut off the lithium battery separator. Subsequently, according to the above-mentioned end of the lithium battery separator, it is sent into the space between the circular tube 21 and the adjusting tube 22 again. As the adjusting tube 22 rotates, the end of the lithium battery separator is sent between the adjusting tube 22 and the top winding roller 23, and the top rotating winding roller 23 continues to wind the lithium battery separator. The device does not need to stop, improving the winding efficiency of the lithium battery separator;

[0044] According to Figure 6 and Figure 7 As shown in the figure, while the above-mentioned lithium battery separator completes the cutting operation, as the bottom winding roller 23 continues to move down, the distance between the winding roller 23 and the adjusting tube 22 continues to increase, so that the lithium battery separator is separated from the lithium battery separator on the adjusting tube 22, which will not affect the subsequent winding operation of the lithium battery separator. And as the winding roller 23 continues to move down, the connecting mechanism 24 automatically releases the connection state of several inner tubes 231, so that the several inner tubes 231 automatically complete the misalignment and disassembly. At this time, the operator can directly pull out the sleeve 232 from the inner tube 231, so that the operator can complete the unloading operation of the wound lithium battery separator roll without performing other operations, facilitating the unloading process of the device and reducing the labor intensity of the operator.

[0045] In a further preferred embodiment of the present invention, as Figure 6 and Figure 7 shown, the outer peripheral wall of the circular tube 21 is in clearance fit with the outer peripheral wall of the adjusting tube 22. A plurality of limiting strips 234 are fixedly arranged on the outer peripheral wall of the inner tube 231 in a circumferential array, and each limiting strip 234 is slidably inserted into the tube wall of the corresponding sleeve 232;

[0046] In this embodiment, it should be noted that the above-mentioned limiting strips 234 are located between the corresponding several second adsorption holes 26;

[0047] According to Figure 6 and Figure 7As shown, during the unloading process of the lithium battery separator by the above operator, after the operator pulls out the sleeve 232 from the inner tube 231, the operator then sleeved a new sleeve 232 on the inner tube 231, and simultaneously inserted the limiting strip 234 into the tube wall of the sleeve 232. Due to the mutual contact between the limiting strip 234 and the tube wall of the sleeve 232, during the process of sleeving the sleeve 232 on the inner tube 231, the second adsorption holes 26 on the sleeve 232 coincide and communicate with the second adsorption holes 26 on the inner tube 231, without the need for the operator to adjust. And at the same time, during the rotation of the inner tube 231, the sleeve 232 will not rotate on the inner tube 231, and the sleeve 232 rotates together with the inner tube 231, facilitating the assembly between the sleeve 232 and the inner tube 231 and improving the unloading efficiency of the lithium battery separator.

[0048] In a further preferred embodiment of the present invention, as Figure 1 and Figure 2 shown, a guiding groove 27 is provided on the outer wall of the housing 1 corresponding to the position of the outer tube 233, and the outer tube 233 penetrates through the corresponding guiding groove 27 and contacts the inner wall of the corresponding guiding groove 27;

[0049] In this embodiment, according to Figure 1 and Figure 2 shown, during the process of the distance between the winding roller 23 and the adjusting tube 22 expanding, due to the mutual contact between the outer peripheral wall of the outer tube 233 and the inner wall of the guiding groove 27, the winding roller 23 moves in a linear trajectory during the movement.

[0050] In a further preferred embodiment of the present invention, as Figure 3 , Figure 6 and Figure 7 shown, the connecting mechanism 24 includes a limiting tube 241. One end of the limiting tube 241 is arranged in a square tube shape, and the outer ring edge of one end of the limiting tube 241 is arranged in an arc shape. The other end of the limiting tube 241 is arranged in a circular tube 21 shape. The limiting tube 241 is slidably installed in the opening at one end of the corresponding inner tube 231. A limiting groove 242 is provided on the other side of the inner tube 231, and the arc-shaped end of the limiting tube 241 is inserted into the corresponding limiting groove 242 and contacts the inner wall of the corresponding limiting groove 242. A first spring 243 is provided between the limiting tube 241 and the inner wall of the corresponding inner tube 231, and both ends of the first spring 243 are respectively connected to the inner wall of the corresponding inner tube 231 and the corresponding limiting tube 241;

[0051] In this embodiment, according to Figure 6 and Figure 7 shown, during the process of splitting several inner tubes 231, due to the mutual contact between the arc surface of the limiting tube 241 and the inner arc wall of the limiting groove 242, the arc-shaped end of the limiting tube 241 can be extruded from the limiting groove 242 along the arc surface of the limiting tube 241, automatically completing the splitting of several inner tubes 231;

[0052] During the process of moving several inner tubes 231 to the coaxial state, due to the mutual contact between the arc surface of the limit tube 241 and the outer ring edge of the sleeve 232, the limit tube 241 can be squeezed into the inner tube 231 along the arc surface of the limit tube 241. Thus, after several inner tubes 231 form the coaxial state, due to the pushing of the first spring 243 on the limit tube 241, the arc-shaped end of the limit tube 241 automatically inserts into the limit groove 242. And due to the mutual contact between the outer arc wall of the limit tube 241 and the inner wall of the limit groove 242, the connection between several inner tubes 231 is completed, without the need for other operations by the operator, reducing the labor intensity of the operator during the use of the device.

[0053] In a further preferred embodiment of the present invention, as Figure 5 , Figure 6 and Figure 8 shown, the cutting assembly 3 includes a cutting knife 32. A storage hole 31 is formed on the outer peripheral wall of the circular tube 21, and the inside of the storage hole 31 communicates with the inside of the circular tube 21. The cutting knife 32 is slidably installed in the storage hole 31. A first piston plate 33 is fixedly installed at the back end of the cutting knife 32, and the outer peripheral wall of the first piston plate 33 is in contact with the inner wall of the storage hole 31. An electric control valve 34 is rotatably installed at the open end of the circular tube 21;

[0054] In this embodiment, it should be noted that one end of the electric control valve 34 far from the circular tube 21 is connected and installed with the liquid discharge end of an external liquid supply device through a liquid delivery pipe. As Figure 6 shown, a sealing ring is installed in the tube wall of the circular tube 21, and the inner ring wall of the sealing ring is in contact with the outer wall of the electric control valve 34;

[0055] After the amount of the lithium battery separator wound on the sleeve 232 reaches the threshold, as Figure 3 and Figure 6 shown, the electric control valve 34 is opened, and the liquid supply device injects a corresponding amount of filling liquid into the circular tube 21 from the electric control valve 34. As Figure 8 shown, after the filling liquid fills the inside of the circular tube 21, a part of the filling liquid in the circular tube 21 flows into the storage hole 31 and applies a driving force to the first piston plate 33, pushing the cutting knife 32 out of the storage hole 31. Subsequently, as Figure 5 shown, after the cutting knife 32 extends out of the storage hole 31, as the circular tube 21 and the adjusting tube 22 rotate, the distance between the cutting knife 32 and the outer wall of the adjusting tube 22 gradually decreases until the cutting knife 32 is in contact with the outer wall of the adjusting tube 22. At this time, the cutting knife 32 cuts the lithium battery separator by means of rolling cutting, and the winding operation of the lithium battery separator within a certain length range can be carried out as required.

[0056] In a further preferred embodiment of the present invention, as Figure 2 , Figure 3 , Figure 4 andFigure 9 As shown in the figure, the adjusting assembly 4 includes a plurality of support plates 41. One end of the support plate 41 is rotatably sleeved on the outer peripheral side of the corresponding inner tube 231 through a bearing. Two fixing blocks 42 are fixedly installed in the housing 1 relatively by bolts. A storage groove 43 is formed in the fixing block 42, and the other end of the support plate 41 is inserted into the corresponding storage groove 43. A second piston plate 44 is fixedly installed at the other end of the support plate 41, and the outer peripheral wall of the second piston plate 44 is in contact with the inner wall of the corresponding storage groove 43. An air pump 45 is fixedly installed in the storage groove 43, and the exhaust end of the air pump 45 extends outside the corresponding fixing block 42. Two second springs 46 are oppositely arranged between the second piston plate 44 and the inner wall of the corresponding storage groove 43, and both ends of each second spring 46 are fixedly connected to the corresponding second piston plate 44 and the inner wall of the corresponding storage groove 43 respectively;

[0057] In this embodiment, it should be noted that the above-mentioned support plate 41 is in contact with the inner wall of the opening of the corresponding storage groove 43;

[0058] According to Figure 9 As shown in the figure, during the process of the winding roller 23 winding the lithium battery separator, the air pump 45 is started simultaneously, continuously extracting the gas in the storage groove 43. The negative pressure intensity in the storage groove 43 gradually increases, and then the adsorption force of the negative pressure cavity in the storage groove 43 on the second piston plate 44 offsets the thrust of the second spring 46 on the second piston plate 44. According to Figure 3 and Figure 9 As shown in the figure, the second piston plate 44 sliding in the storage groove 43 evenly pulls part of the support plate 41 into the storage groove 43, so as to synchronously adjust the distance between the winding roller 23 and the adjusting tube 22 as the winding amount of the lithium battery separator on the sleeve 232 increases, leaving space for the lithium battery separator to wind around the sleeve 232, and avoiding the lithium battery separator on the bottom winding roller 23 from affecting the winding operation of the lithium battery separator by the top winding roller 23.

[0059] In a further preferred embodiment of the present invention, as Figure 9 shown in the figure, a pressure limiting valve 47 is fixedly installed on the side of the fixing block 42 away from the air pump 45, and the intake end of the pressure limiting valve 47 is inserted into the corresponding storage groove 43;

[0060] In this embodiment, according to Figure 9 shown in the figure, during the process of the air pump 45 extracting the gas in the storage groove 43, a pressure difference appears at both ends of the pressure limiting valve 47 synchronously. At this time, the outside gas continuously flows into the storage groove 43 from the pressure limiting valve 47 to supplement a part of the gas lost in the storage groove 43. According to Figure 4 and Figure 9As shown, after the air pump 45 stops operating, due to the push of the second spring 46, the second piston plate 44 quickly moves backward to reset until the second piston plate 44 abuts against the inner wall of the storage tank 43, and a plurality of inner tubes 231 are restored to the coaxial state, without the need for other operations by the operator.

[0061] In a further preferred embodiment of the present invention, as Figure 9 shown, a plurality of first limit blocks 48 and a plurality of second limit blocks 49 are respectively fixedly installed at the positions corresponding to the second piston plate 44 in the storage tank 43, and both the first limit block 48 and the second limit block 49 are located between the corresponding two second springs 46. The second limit block 49 is located between the corresponding two first limit blocks 48, and the length of the second limit block 49 is greater than the length of the first limit block 48;

[0062] In this embodiment, it should be noted that, according to Figure 9 shown, the above-mentioned first limit block 48 and second limit block 49 are both located between the corresponding second piston plate 44 and the corresponding air pump 45 and the corresponding pressure limiting valve 47;

[0063] After the cutting operation of the lithium battery separator is completed, according to Figure 9 shown, during the process of the support plate 41 retracting into the storage tank 43, due to the mutual abutment of the first limit block 48 and the second limit block 49 with the second piston plate 44, the length of the support plate 41 retracting into the storage tank 43 changes accordingly, so that a plurality of inner tubes 231 are automatically displaced, without the need to set up an additional driving structure, reducing the production cost of the device.

[0064] In a further preferred embodiment of the present invention, as Figure 2 、 Figure 3 and Figure 10 shown, the driving air extraction assembly 5 includes a protective shell 51. Two protective shells 51 are relatively fixedly installed on the outer wall of the outer shell 1 at the positions corresponding to the circular tube 21 and the adjusting tube 22, and the interiors of both protective shells 51 are communicated with the interior of the adjusting tube 22. Two soft tubes 52 are communicated and installed on the upper and lower sides of the protective shell 51, and the air inlet end of each soft tube 52 is inserted into the corresponding outer tube 233 and rotatably connected to the corresponding outer tube 233. The two ends of the circular tube 21 rotatably penetrate through the shell wall of the protective shell 51. Outer tooth rings 53 are fixedly sleeved at both ends of the circular tube 21 and both ends of the adjusting tube 22, and two adjacent outer tooth rings 53 are meshed and connected. The outer tooth ring 53 is located in the corresponding protective shell 51. A motor 54 is fixedly installed on the inner side wall of the outer shell 1, and a driving gear 55 is fixedly installed at the driving end of the motor 54, and the driving gear 55 is meshed with the corresponding outer tooth ring 53. Two drivers 56 are relatively arranged in the outer shell 1, and the shell wall of the driver 56 is fixedly connected to the corresponding support plate 41. The driving tooth ring of the driver 56 is fixedly sleeved on the outer peripheral side of the corresponding outer tube 233;

[0065] In this embodiment, it should be noted that the above-mentioned driver 56 is mainly an electric control driving device composed of a housing, a driving motor, several gears and a driving gear ring. The middle position of the soft tube 52 is spirally arranged so that the length of the soft tube 52 can be adaptively adjusted according to needs;

[0066] When using the device, according to Figure 2 , Figure 3 and Figure 10 As shown, the motor 54 starts to drive the driving gear 55 to rotate at a constant speed, so as to drive the circular tube 21 and the adjusting tube 22 to rotate slowly and evenly towards each other through the external gear ring 53. Since the diameter circle of the external gear ring 53 is larger than the diameter of the driving gear 55, the driving force of the motor 54 on the circular tube 21 and the adjusting tube 22 can be enhanced;

[0067] According to Figure 4 and Figure 5 As shown, when the winding roller 23 winds the lithium battery separator, the driver 56 drives the winding roller 23 to rotate, and winds the lithium battery separator on the outer peripheral side of the sleeve. And due to the fixation between the driver 56 and the support plate 41, the movement of the winding roller 23 will not affect the driving operation of the driver 56 on the winding roller 23.

[0068] In a further preferred embodiment of the present invention, as Figure 2 and Figure 10 shown, two exhaust pipes 57 are fixedly penetrated and installed on the side wall of the protective shell 51. A transmission gear 58 is rotatably installed on the outer wall of the outer shell 1 at a position corresponding to the exhaust pipe 57, and the transmission gear 58 is meshed and connected with the corresponding external gear ring 53. An impeller 59 is arranged in the exhaust pipe 57, and the impeller 59 is fixedly connected with the corresponding transmission gear 58. The impeller 59 is in clearance fit with the inner wall of the corresponding exhaust pipe 57;

[0069] In this embodiment, according to Figure 3 , Figure 4 and Figure 10 shown, while the external gear ring 53 is slowly rotating, it will simultaneously drive the transmission gear 58 to rotate rapidly, and the rotating transmission gear 58 synchronously drives the impeller 59 to rotate rapidly in the exhaust pipe 57. According to Figure 2 and Figure 10As shown, the rotating impeller 59 pushes the gas in the exhaust pipe 57 out of the exhaust pipe 57, thereby continuously forming a negative pressure cavity in the exhaust pipe 57. Due to the pressure difference between the inside of the exhaust pipe 57 and the inside of the protective shell 51, the gas in the protective shell 51 continuously flows into the exhaust pipe 57 to supplement the gas lost in the exhaust pipe 57. At the same time, the gas inside the circular tube 21 and the adjustment tube 22 also synchronously flows into the protective shell 51 to supplement a part of the gas lost in the protective shell 51. Meanwhile, the gas in the winding roller 23 also continuously flows into the protective shell 51 through the flexible tube 52 to supplement another part of the gas lost in the protective shell 51, so that when the driving assembly drives the circular tube 21 to rotate, the gas in the circular tube 21 and the adjustment tube 22 is synchronously extracted. There is no need to set up an additional driving structure, reducing the production cost of the device.

[0070] Working principle: When the improved lithium battery separator cutting and winding equipment is in use, the slitting device cuts the lithium battery separator into several lithium battery separators of equal length and pushes the cut lithium battery separator into the positioning mechanism of the slitting device. Thus, the end of the cut lithium battery separator moves from the corresponding position inside the outer shell 1 to the top side of the round rod. At the same time, the motor 54 is started to drive the driving gear 55 to rotate uniformly, thereby driving the circular tube 21 and the adjustment tube 22 to rotate slowly and uniformly towards each other through the external tooth ring 53. Among them, while the external tooth ring 53 is slowly rotating, it will simultaneously drive the transmission gear 58 to rotate rapidly, and the rotating transmission gear 58 synchronously drives the impeller 59 to rotate rapidly inside the exhaust pipe 57. The rotating impeller 59 pushes the gas in the exhaust pipe 57 out of the exhaust pipe 57, thereby continuously forming a negative pressure cavity in the exhaust pipe 57. Due to the pressure difference between the inside of the exhaust pipe 57 and the inside of the protective shell 51, the gas in the protective shell 51 continuously flows into the exhaust pipe 57 to supplement the gas lost in the exhaust pipe 57. At the same time, the gas inside the circular tube 21 and the adjustment tube 22 also synchronously flows into the protective shell 51 to supplement a part of the gas lost in the protective shell 51. Meanwhile, the gas in the winding roller 23 also continuously flows into the protective shell 51 through the flexible tube 52 to supplement another part of the gas lost in the protective shell 51, so that a negative pressure cavity is continuously formed inside the circular tube 21, the adjustment tube 22 and the winding roller 23. At the same time, the outside gas flows into the circular tube 21 and the winding roller 23 through the first adsorption hole 25 and the second adsorption hole 26 to supplement the gas lost in the circular tube 21 and the winding roller 23;

[0071] During the opposite rotation of the circular tube 21 and the adjusting tube 22, the movement trajectory of the end of the lithium battery diaphragm can be constrained and guided by rotating the circular tube 21, so that the end of the lithium battery diaphragm directly inserts into the gap between the ends of the circular tube 21 and the adjusting tube 22. Furthermore, the end of the lithium battery diaphragm adheres to the adjusting tube 22. At this time, due to the blockage of the first adsorption hole 25 by the lithium battery diaphragm, an adsorption force can be applied between the lithium battery diaphragm and the adjusting tube 22, making the end of the lithium battery diaphragm adhere to the adjusting tube 22. As the adjusting tube 22 rotates, the end of the lithium battery diaphragm moves in a circular motion around the adjusting tube 22, and then the end of the lithium battery diaphragm is sent between the adjusting tube 22 and the bottom winding roller 23. At this time, due to the blockage of the second adsorption hole 26 by the lithium battery diaphragm, a stronger adsorption force can be formed between the end of the lithium battery diaphragm and the winding roller 23, so that the end of the lithium battery diaphragm separates from the adjusting roller. At the same time, the bottom driver 56 drives the winding roller 23 to rotate at a constant speed, and the lithium battery diaphragm adheres to the winding roller 23 and rotates together with the winding roller 23, winding the lithium battery diaphragm around the sleeve 232;

[0072] When the lithium battery diaphragm is wound around the sleeve 232 as described above, the air pump 45 is started simultaneously, continuously extracting the gas in the storage tank 43. As the gas in the storage tank 43 is lost, the negative pressure intensity in the storage tank 43 gradually increases. Then, the adsorption force of the negative pressure chamber in the storage tank 43 on the second piston plate 44 cancels the thrust of the second spring 46 on the second piston plate 44, so that the support plate 41 retracts into the storage tank 43 at a constant speed, thereby synchronously adjusting the distance between the winding roller 23 and the adjusting tube 22 as the winding amount of the lithium battery diaphragm on the sleeve 232 increases, leaving space for the lithium battery diaphragm to wind around the sleeve 232;

[0073] It should be noted that when the air pump 45 extracts the gas in the storage tank 43, a pressure difference appears at both ends of the pressure limiting valve 47 synchronously. At this time, the outside gas continuously flows into the storage tank 43 from the pressure limiting valve 47 to supplement a part of the gas lost in the storage tank 43;

[0074] As the lithium battery separator on the sleeve 232 is wound, after the winding amount of the lithium battery separator on the sleeve 232 reaches the threshold, the electric control valve 34 opens, and the liquid supply device injects a corresponding amount of filling liquid into the circular tube 21 from the electric control valve 34. After the filling liquid fills the inside of the circular tube 21, a part of the filling liquid in the circular tube 21 flows into the storage hole 31 and applies a driving force to the first piston plate 33, pushing the cutting knife 32 out of the storage hole 31 until the first piston plate 33 abuts against the inner wall of the storage hole 31. After the cutting knife 32 extends out of the storage hole 31, as the circular tube 21 and the adjusting tube 22 rotate, the distance between the cutting knife 32 and the outer wall of the adjusting tube 22 gradually decreases until the cutting knife 32 abuts against the outer wall of the adjusting tube 22. At this time, the cutting knife 32 cuts the lithium battery separator by means of rotary cutting. Subsequently, as the circular tube 21 rotates, the new end of the lithium battery separator is automatically fed into the gap between the circular tube 21 and the adjusting tube 22. Subsequently, as shown above, the end of the lithium battery separator rotates together with the rotating adjusting tube 22, and then the end of the lithium battery separator is fed into the space between the adjusting tube 22 and the top winding roller 23. At the same time, the top driver 56 drives the top winding roller 23 to rotate at a constant speed, and winds the subsequent lithium battery separator on the top sleeve;

[0075] After the cutting knife 32 cuts the lithium battery separator, the driver 56 continues to drive the winding roller 23 to rotate one week and then stops running. And as shown above, as the support plate 41 continues to retract into the storage groove 43, it can drive the wound lithium battery separator roll to continue to move, separating the automatic adjusting roller for the wound lithium battery separator roll, so as to prevent the wound lithium battery separator from affecting the subsequent winding operation of the lithium battery separator. And as the bottom winding roller 23 rotates, a binding force can be applied to the lithium battery separator roll by the gas on the outer peripheral side when the lithium battery separator roll rotates, preventing the lithium battery roll from coming apart. And after the second piston plate 44 abuts against the first limiting block 48 or the second limiting block 49, the support plate 41 no longer continues to retract into the storage groove 43. At this time, because the lengths of the first limiting block 48 and the second limiting block 49 are different, this causes the support plate 41 to drive a plurality of inner tubes 231 to be misaligned synchronously while retracting into the storage groove 43. During the misalignment process of the plurality of inner tubes 231, due to the mutual abutment of the arc surface of the limiting tube 241 and the inner wall of the limiting groove 242, the arc-shaped end of the limiting tube 241 can be directly extruded out of the limiting groove 242 along the arc surface of the limiting tube 241, automatically releasing the connection state between the plurality of inner tubes 231;

[0076] After several inner tubes 231 are misaligned, the operator directly pulls out the sleeve 232 from the inner tube 231, and the rolled lithium battery diaphragm roll can be directly removed from the device. The new sleeve 232 is then re-sleeved on the inner tube 231, and the limiting strip 234 is simultaneously inserted into the tube wall of the sleeve 232, thereby completing the second adsorption hole 26 on the inner tube 231 of the sleeve 232. At this time, due to the mutual interference between the limiting strip 234 and the tube wall of the sleeve 232, the sleeve 232 can rotate together with the inner tube 231, and the replacement of the sleeve 232 is completed.

[0077] After the unloading of the lithium battery diaphragm roll is completed, the air pump 45 stops running. At this time, as shown above, as the external gas continues to flow into the storage tank 43 from the pressure limiting valve 47, the negative pressure intensity in the storage tank 43 decreases rapidly. At this time, due to the push of the second spring 46, the second piston plate 44 quickly moves in the opposite direction and resets until the second piston plate 44 and the inner wall of the storage tank 43 conflict with each other. In the process of releasing the misalignment of the inner tube 231, due to the mutual conflict between the arc surface of the limiting tube 241 and the outer ring edge of the sleeve 232, the limiting tube 241 can be squeezed into the inner tube 231 along the arc surface of the limiting tube 241, so that the multiple inner tubes 231 form a coaxial state. At this time, due to the push of the limiting tube 241 by the first spring 243, if there is no misalignment between the limiting tube 241 and the limiting groove 242, The first spring 243 pushes the arcuate end of the limiting tube 241 to automatically insert into the limiting groove 242, and due to the mutual interference between the outer arc wall of the limiting tube 241 and the inner wall of the limiting groove 242, the connection between the two adjacent inner tubes 231 is completed. Then, the driver 56 drives the inner tube 231 to drive the outer tube 233 to rotate intermittently at a high speed. At this time, if the connection between the two inner tubes 231 is not completed, due to the action of inertia, the arcuate end of the limiting tube 241 slides against the side wall of the inner tube 231, and an angular offset occurs between the two inner tubes 231, thereby completing the alignment operation between the arcuate end of the limiting tube 241 and the limiting groove 242. Finally, through multiple reciprocating rotations of the outer tube 233, the alignment operation between the limiting tube 241 and the limiting groove 242 is completed in sequence, so that the multiple inner tubes 231 are dynamically connected.

[0078] After the amount of lithium battery diaphragm wound on the top sleeve 232 reaches a threshold value, the cutting operation of the lithium battery diaphragm is completed by the cutter 32 according to the above, and the end of the lithium battery diaphragm is sent to the gap between the adjusting tube 22 and the bottom winding roller 23 again by the rotation of the adjusting tube 22, and the above-mentioned lithium battery diaphragm winding operation is performed. At the same time, according to the above, as the top part support plate 41 is retracted into the storage tank 43, the top winding roller 23 can be disassembled, so that the operator can directly take off the lithium battery diaphragm roll, and then the top air pump 45 stops running, and the assembly of the top winding roller 23 is completed. The winding operation of the lithium battery diaphragm can be continuously performed in this reciprocating manner;

[0079] It should be noted that for the operation of the above device, a control host can be externally connected to the device, so as to control the operation state of the device through the control host.

[0080] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery separator cutting and winding device, including a housing (1), characterized in that, Further comprising: A winding assembly (2), the winding assembly (2) is arranged inside the housing (1), the winding assembly (2) is mainly composed of a circular tube (21), an adjusting tube (22) and two winding rollers (23), and the circular tube (21) and the adjusting tube (22) are relatively rotatably arranged inside the housing (1), the two winding rollers (23) are relatively arranged on the upper and lower sides of the adjusting tube (22), the winding roller (23) is mainly composed of a plurality of inner tubes (231), a plurality of sleeve tubes (232) and two outer tubes (233), the two outer tubes (233) are relatively arranged, and a plurality of inner tubes (231) are arranged between the corresponding two outer tubes (233), the outer tube (233) is fixedly connected to the corresponding inner tube (231), and adjacent two inner tubes (231) are connected by a connecting mechanism (24), the sleeve tube (232) is slidably sleeved on the outer peripheral side of the corresponding inner tube (231), a plurality of second adsorption holes (26) are commonly formed in a circumferential array on the tube wall of the sleeve tube (232) and the tube wall of the inner tube (231), and a plurality of first adsorption holes (25) are formed in a circumferential array on the outer peripheral wall of the circular tube (21); Two adjusting assemblies (4), the two adjusting assemblies (4) are relatively arranged on the upper and lower sides of the two winding rollers (23), and the adjusting assembly (4) adjusts the vertical position of the inner tube (231); A cutting assembly (3), the cutting assembly (3) is arranged on the circular tube (21), and the cutting assembly (3) cuts the lithium battery separator; Two driving air extraction assemblies (5), the driving air extraction assemblies (5) are arranged on the outer peripheral sides of the two winding rollers (23), and the driving air extraction assemblies (5) drive the circular tube (21), the adjusting tube (22) and the two winding rollers (23) to rotate, and continuously extract the gas inside the circular tube (21), the adjusting tube (22) and the two winding rollers (23); The adjusting assembly (4) includes a plurality of support plates (41), one end of the support plate (41) is rotatably sleeved on the outer peripheral side of the corresponding inner tube (231) through a bearing, two fixing blocks (42) are relatively fixedly arranged inside the housing (I) by bolts, a storage groove (43) is formed in the fixing block (42), and the other end of the support plate (41) is inserted into the corresponding storage groove (43); A plurality of first limiting blocks (48) and a plurality of second limiting blocks (49) are respectively fixedly arranged at positions corresponding to the second piston plate (4) in the storage groove (43), and both the first limiting block (48) and the second limiting block (49) are located between the corresponding two second springs (46), the second limiting block (49) is located between the corresponding two first limiting blocks (48), and the length of the second limiting block (49) is greater than the length of the first limiting block (48); The driving and air extraction assembly (5) includes a protective housing (51). Two of the protective housings (51) are relatively fixedly installed on the outer wall of the outer housing (1) at positions corresponding to the circular tube (21) and the adjusting tube (22), and the interiors of the two protective housings (51) are both communicated with the interior of the adjusting tube (22). Two flexible tubes (52) are communicatively installed on the upper and lower sides of the protective housing (51), and the air inlet end of each flexible tube (52) is inserted into the corresponding outer tube (233) and rotatably connected to the corresponding outer tube (233). The two ends of the circular tube (21) rotatably penetrate through the wall of the protective housing (51). Outer toothed rings (53) are fixedly sleeved on both ends of the circular tube (21) and both ends of the adjusting tube (22), and two adjacent outer toothed rings (53) are meshed and connected. The outer toothed ring (53) is located inside the corresponding protective housing (51). A motor (54) is fixedly installed on the inner side wall of the outer housing (1). A driving gear (55) is fixedly installed at the driving end of the motor (54), and the driving gear (55) is meshed and connected with the corresponding outer toothed ring (53). Two drivers (56) are oppositely arranged inside the outer housing (1), and the wall of the driver (56) is fixedly connected to the corresponding support plate (41). The driving toothed ring of the driver (56) is fixedly sleeved on the outer peripheral side of the corresponding outer tube (233); Two exhaust pipes (57) are relatively fixedly penetrated through the side wall of the protective housing (51). A transmission gear (58) is rotatably installed on the outer wall of the outer housing (1) at a position corresponding to the exhaust pipe (57), and the transmission gear (58) is meshed and connected with the corresponding outer toothed ring (53). An impeller (59) is arranged inside the exhaust pipe (57), and the impeller (59) is fixedly connected to the corresponding transmission gear (58). The impeller (59) is in clearance fit with the inner wall of the corresponding exhaust pipe (57).

2. The lithium battery separator cutting and winding device according to claim 1, characterized in that: The outer peripheral wall of the circular tube (21) is in clearance fit with the outer peripheral wall of the adjusting tube (22). A plurality of limiting strips (234) are fixedly arranged in a circumferential array on the outer peripheral wall of the inner tube (231), and each limiting strip (234) is slidably inserted into the wall of the corresponding sleeve (232).

3. The lithium battery separator cutting and winding equipment according to claim 2, characterized in that: A guiding groove (27) is formed on the outer wall of the outer housing (1) at a position corresponding to the outer tube (233), and the outer tube (233) penetrates through the corresponding guiding groove (27) and is in contact with the inner wall of the corresponding guiding groove (27).

4. The lithium battery separator cutting and winding equipment according to claim 3, characterized in that: The connecting mechanism (24) includes a limiting tube (241). One end of the limiting tube (241) is arranged in a square tube shape, and the outer ring edge of one end of the limiting tube (241) is arranged in an arc shape. The other end of the limiting tube (241) is arranged in a circular tube (21) shape. The limiting tube (241) is slidably installed in the opening at one end of the corresponding inner tube (231). A limiting groove (242) is formed on the other side of the inner tube (231). The arc end of the limiting tube (241) is inserted into the corresponding limiting groove (242) and contacts the inner wall of the corresponding limiting groove (242). A first spring (243) is arranged between the inner wall of the limiting tube (241) and the inner wall of the corresponding inner tube (231), and the two ends of the first spring (243) are respectively connected to the inner wall of the corresponding inner tube (231) and the corresponding limiting tube (241).

5. The lithium battery separator cutting and winding equipment according to claim 4, characterized in that: The cutting assembly (3) includes a cutting knife (32). A storage hole (31) is formed on the outer peripheral wall of the circular tube (21), and the inside of the storage hole (31) communicates with the inside of the circular tube (21). The cutting knife (32) is slidably installed in the storage hole (31). A first piston plate (33) is fixedly installed at the back end of the cutting knife (32), and the outer peripheral wall of the first piston plate (33) contacts the inner wall of the storage hole (31). An electric control valve (34) is rotatably installed at the opening end of the circular tube (21).

6. The lithium battery separator cutting and winding device according to claim 5, characterized in that: The other end of the support plate (41) is fixedly installed with a second piston plate (44), and the outer peripheral wall of the second piston plate (44) contacts the inner wall of the corresponding storage tank (43). An air pump (45) is fixedly installed in the storage tank (43), and the exhaust end of the air pump (45) extends outside the corresponding fixed block (42). Two second springs (46) are oppositely arranged between the second piston plate (44) and the inner wall of the corresponding storage tank (43), and the two ends of each second spring (46) are fixedly connected to the corresponding second piston plate (44) and the inner wall of the corresponding storage tank (43).

7. The lithium battery separator cutting and winding device according to claim 6, characterized in that: A pressure limiting valve (47) is fixedly installed on one side of the fixed block (42) away from the air pump (45), and the intake end of the pressure limiting valve (47) is inserted into the corresponding storage tank (43).

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