CN219729965U - Lithium battery diaphragm winding equipment - Google Patents

Abstract

The utility model relates to the technical field of lithium battery diaphragm winding, in particular to lithium battery diaphragm winding equipment, which comprises a workbench, a guide assembly, a winding assembly and a side pressure assembly, wherein the guide assembly, the winding assembly and the side pressure assembly are all arranged on the workbench, the guide assembly comprises a supporting frame, a movable guide roller and a fixed guide roller, the fixed guide roller and the movable guide roller are respectively and rotatably connected to the supporting frame, and a distance for a lithium battery diaphragm to pass is arranged between the movable guide roller and the fixed guide roller; the winding assembly comprises a winding roller and a driving motor, the winding assembly is rotatably connected to the workbench, and the driving motor is in transmission connection with the winding roller; the side pressure subassembly includes supporting seat and side compression roller, and the side pressure roller rotates to be connected on the supporting seat, and the side pressure roller has towards winding roller motion trend. The utility model can reduce the possibility of wrinkling of the lithium battery diaphragm in the winding process, thereby improving the quality of the lithium battery diaphragm in the later use.

Description

Lithium battery diaphragm winding equipment

Technical Field

The utility model relates to the technical field of lithium battery diaphragm winding, in particular to lithium battery diaphragm winding equipment.

Background

In lithium batteries, the separator is a critical part that needs to ensure free passage of lithium ions to form a circuit while preventing the positive and negative electrodes from touching each other, i.e., functioning as an insulator to avoid shorting the battery.

After the lithium battery separator is manufactured, the lithium battery separator is generally required to be wound on a core barrel, so that the lithium battery separator is convenient to store or transport, and the core barrel is a hollow pipe barrel. When in winding, the core barrel is sleeved on a rotating roller, the roller drives the core barrel to rotate, and the core barrel realizes winding of the lithium battery diaphragm in the rotating process.

Although the process can realize the winding of the lithium battery diaphragm, the lithium battery diaphragm has the characteristics of light weight and low strength, and is easy to wrinkle in the winding process, and the wrinkles can greatly influence the lithium battery diaphragm and seriously influence the quality of the lithium battery diaphragm in the later use.

Disclosure of Invention

In order to reduce the possibility of wrinkling of the lithium battery diaphragm in the winding process and improve the quality of the lithium battery diaphragm in the later use, the utility model provides lithium battery diaphragm winding equipment.

The utility model provides lithium battery diaphragm winding equipment, which adopts the following technical scheme:

the utility model provides a lithium battery diaphragm winding equipment, includes workstation, guide subassembly, winding subassembly and side pressure subassembly all set up on the workstation, guide subassembly includes support frame, moves guide roller and fixed guide roller, fixed guide roller with move guide roller respectively rotate connect in the support frame, move guide roller has the trend of orientation to the fixed guide roller removes, move guide roller with have the interval that supplies the lithium battery diaphragm to pass between the fixed guide roller; the winding assembly comprises a winding roller and a driving motor, the winding assembly is rotatably connected to the workbench, and the driving motor is in transmission connection with the winding roller; the side pressure assembly comprises a supporting seat and a side pressure roller, and the side pressure roller is rotationally connected to the supporting seat.

Through adopting above-mentioned technical scheme, guide assembly is used for guiding lithium battery diaphragm, and in the guide process, moves the guide roller and extrudees and decides the guide roller, and lithium battery diaphragm receives the extrusion when moving between guide roller and the guide roller surely, realizes for the first time regular and smooths. The guided lithium battery diaphragm moves to the winding assembly, the winding assembly winds the lithium battery diaphragm, and in the process of winding the lithium battery diaphragm, the side pressure assembly presses the lithium battery diaphragm to regulate and smooth the lithium battery diaphragm again. The guiding component and the side pressure component are matched together to achieve twice regulation and smoothing of the lithium battery diaphragm, so that the possibility of wrinkling of the lithium battery diaphragm in the winding process is reduced, and the quality of the lithium battery diaphragm in later use is improved.

Preferably, the support frame comprises an upper mounting plate, a connecting plate and a lower mounting seat, the lower mounting seat is connected to the workbench, the upper mounting plate is parallel to the lower mounting seat, the connecting plate is connected between the upper mounting plate and the lower mounting seat, sliding grooves are respectively formed in the upper mounting plate and the lower mounting seat, movable sliding blocks and mounting blocks are arranged in the sliding grooves, the movable sliding blocks are connected in the sliding grooves in a sliding manner, the mounting blocks are fixedly connected in the sliding grooves, movable guide rollers are connected between the two movable sliding blocks in a rotating manner, fixed guide rollers are connected between the two mounting blocks in a rotating manner, and first elastic pieces for driving the movable sliding blocks to move towards the mounting blocks are arranged in the sliding grooves.

Through adopting above-mentioned technical scheme, when lithium battery diaphragm is through moving between guide roller and the fixed guide roller, move the slider and have the trend of orientation fixed installation piece removal under the elasticity of first elastic component, move the slider and drive and move the guide roller towards the fixed guide roller to this makes lithium battery diaphragm be pressed from both sides tightly between moving guide roller and the fixed guide roller, thereby realizes the regulation and smooth to lithium battery diaphragm.

Preferably, the inner side wall of the sliding groove is provided with a guide rail, and the side walls of the movable sliding block and the mounting block are respectively provided with a sliding groove which is in sliding fit with the guide rail.

Through adopting above-mentioned technical scheme, the cooperation in guided way and the groove of sliding has the guide effect, has improved the stability of moving the slider and fixing the installation piece in the in-process of sliding.

Preferably, the winding roller is provided with an installation inner hole along the axial direction, the side wall of the winding roller is provided with a guide-out opening communicated with the installation inner hole, a pressed sheet is arranged in the installation inner hole and connected with a propping sheet extending into the guide-out opening, an ejection air bag is arranged in the installation inner hole, and the outer side wall of the ejection air bag is attached to one side of the pressed sheet, which is away from the propping sheet.

By adopting the technical scheme, before the lithium battery diaphragm is wound, the air is not filled in the ejection air bag, and the ejection air bag is in a contracted state. At this time, the staff establishes the core barrel cover of coiling lithium cell diaphragm outside the winding roller, then fills gas in to ejecting gasbag through the air inlet, utilizes ejecting gasbag to push out the export of propping piece, and when propping piece supported the inside wall of tight core barrel, the staff utilized the ligature area to tie up the air inlet. The top support piece can tightly support the core barrel in the core barrel, so that the possibility of follow-up rotation of the core barrel due to slipping in the working process is reduced.

Preferably, the guiding-out opening is opened along the circumferential direction of the winding roller by at least three, and the pressed sheet and the top supporting sheet are correspondingly provided with three groups.

By adopting the technical scheme, the three groups of top supporting sheets are matched together, so that the stability of the supporting core barrel is improved.

Preferably, the top support sheet is provided with a yielding port, a tightening elastic ring is arranged in the installation inner hole, and the tightening elastic ring passes through each yielding port.

Through adopting above-mentioned technical scheme, when the coiling is accomplished, the staff stops driving motor, then opens the strapping on the air inlet, and the gaseous release in the ejecting gasbag, ejecting gasbag are in the shrink state. At this time, the elastic force of the tightening elastic ring drives each top supporting piece to enter the guide outlet, the top supporting pieces are separated from the inner side wall of the core barrel, and a worker takes out the core barrel wound with the lithium battery diaphragm from the winding roller.

Preferably, the supporting seat comprises a connecting base and an upper sliding seat, the connecting base is fixedly connected to the workbench, the upper sliding seat is connected to the connecting base in a sliding manner, the side pressure roller is rotationally connected to the upper sliding seat, the upper sliding seat faces one face of the connecting base and is connected with a sliding guide rail, the connecting base faces one face of the upper sliding seat and is provided with a sliding guide groove for sliding of the sliding guide rail, and a second elastic piece for driving the upper sliding seat to move towards the winding roller is arranged in the sliding guide groove.

Through adopting above-mentioned technical scheme, at the in-process that the winding roller was convoluteed, the elasticity of second elastic component drove to go up the seat of sliding and remove towards the winding roller, goes up the seat of sliding and drives the side pressure roller and remove towards the winding roller for the side pressure roller pastes the lithium cell diaphragm of tightly coiling outside the core section of thick bamboo, in order to realize smoothing to the lithium cell diaphragm.

In summary, the utility model has the following beneficial technical effects:

1. the guiding component and the side pressure component are matched together to achieve twice regulation and smoothing of the lithium battery diaphragm, so that the possibility of wrinkling of the lithium battery diaphragm in the winding process is reduced, and the quality of the lithium battery diaphragm in the later use process is improved.

2. When the lithium battery diaphragm passes through between the movable guide roller and the fixed guide roller, the movable sliding block has a trend of moving towards the fixed installation block under the elasticity of the first elastic piece, and the movable sliding block drives the movable guide roller to move towards the fixed guide roller, so that the lithium battery diaphragm is clamped between the movable guide roller and the fixed guide roller, and the lithium battery diaphragm is regulated and smoothed.

3. Before the lithium battery diaphragm is wound, the ejection air bag is not filled with air, and is in a contracted state. At this time, the staff establishes the core barrel cover of coiling lithium cell diaphragm outside the winding roller, then fills gas in to ejecting gasbag through the air inlet, utilizes ejecting gasbag to push out the export of propping piece, and when propping piece supported the inside wall of tight core barrel, the staff utilized the ligature area to tie up the air inlet. The top support piece can tightly support the core barrel in the core barrel, so that the possibility of follow-up rotation of the core barrel due to slipping in the working process is reduced.

4. In the process of winding by the winding roller, the elastic force of the second elastic piece drives the upper sliding seat to move towards the winding roller, and the upper sliding seat drives the side pressing roller to move towards the winding roller, so that the side pressing roller is tightly attached to the lithium battery diaphragm wound outside the core barrel, and the lithium battery diaphragm is smoothed.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic view of the structure of the guide assembly of the present utility model.

Fig. 3 is a schematic structural view of the upper mounting base in the present utility model.

Fig. 4 is a schematic view of the structure of the lower mounting plate in the present utility model.

Fig. 5 is a cross-sectional view of a winding roller in the present utility model.

Fig. 6 is a schematic view of the structure of the compressed sheet and the top support sheet in the present utility model.

Fig. 7 is a schematic structural view of a side pressure assembly according to the present utility model.

Fig. 8 is a top view of a side pressure assembly of the present utility model.

Reference numerals illustrate: 1. a work table; 11. a table top; 111. a matching groove; 12. support legs; 2. a guide assembly; 21. a support frame; 211. an upper mounting plate; 212. a connecting plate; 213. a lower mounting seat; 214. a mounting groove; 215. a guide rail; 216. a movable sliding block; 217. a fixed mounting block; 218. a first elastic member; 22. a moving guide roller; 23. a fixed guide roller; 3. a winding assembly; 31. a winding roller; 311. installing an inner hole; 312. an outlet port; 313. tabletting; 314. a top support sheet; 3141. a yielding port; 315. ejecting the air bag; 3151. an air inlet; 316. tightening the elastic ring; 32. a driving motor; 321. a driving pulley; 322. a driven pulley; 323. a drive belt; 33. a mounting frame; 4. a side pressure assembly; 41. a support base; 411. the base is connected; 412. an upper sliding seat; 413. dovetail guide rails; 414. dovetail guide slots; 415. a sliding guide rail; 416. a slip guide groove; 417. a second elastic member; 418. a baffle; 42. and a side press roller.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-8.

In order to reduce the possibility of wrinkling of a lithium battery diaphragm in a winding process and improve the quality of the lithium battery diaphragm in later use, the embodiment of the utility model discloses lithium battery diaphragm winding equipment.

Referring to fig. 1, a lithium battery separator winding apparatus includes a table 1, a guide assembly 2, a winding assembly 3, and a side pressure assembly 4. The guide assembly 2, the winding assembly 3 and the side pressure assembly 4 are all provided on the table 1. The guiding component 2 is used for guiding the lithium battery diaphragm, the guided lithium battery diaphragm moves to the winding component 3, the winding component 3 winds the lithium battery diaphragm, and the side pressure component 4 presses the lithium battery diaphragm in the process of winding the lithium battery diaphragm, so that the possibility of wrinkling of the lithium battery diaphragm in the winding process is reduced.

Referring to fig. 1, the table 1 includes a table top 11 and support legs 12, the upper surface of the table top 11 is rectangular, and the guide assembly 2, the winding assembly 3, and the side pressure assembly 4 are sequentially disposed along the length direction of the table top 11. The supporting legs 12 are fixedly connected to the lower surface of the table top 11, one supporting leg 12 is respectively arranged at the corner of the table top 11, and the table 1 is supported on the ground through the supporting legs 12.

Referring to fig. 2 to 4, the guide assembly 2 includes a support frame 21, a movable guide roller 22, and a fixed guide roller 23. The fixed guide roller 23 and the movable guide roller 22 are rotatably connected to the support frame 21, respectively, the movable guide roller 22 has a tendency to move toward the fixed guide roller 23, and a distance for passing the lithium battery separator is provided between the movable guide roller 22 and the fixed guide roller 23.

Referring to fig. 2 to 4, the support bracket 21 includes an upper mounting plate 211, a connection plate 212, and a lower mounting seat 213. The lower mounting seat 213 is fixedly connected to the table top 11, the upper mounting plate 211 is parallel to the lower mounting seat 213, the connecting plate 212 is connected between the upper mounting plate 211 and the lower mounting seat 213, the bottom end of the connecting plate 212 is fixedly connected to the lower mounting seat 213, and the top end of the connecting plate is connected to the upper mounting plate 211 through a bolt.

Referring to fig. 2 to 4, the upper mounting plate 211 and the lower mounting plate 213 are respectively provided with a mounting groove 214, and guide rails 215 are integrally formed on the inner side walls of the mounting grooves 214. A movable sliding block 216 and a mounting block 217 are arranged in the mounting groove 214, and sliding grooves (not shown in the figure) which are in sliding fit with the guide rail 215 are respectively formed in the side walls of the movable sliding block 216 and the mounting block 217.

During installation, a worker slides the movable sliding block 216 into the installation groove 214, and the movable sliding block 216 is connected in the sliding groove in a sliding manner through the matching of the guide rail 215 and the sliding groove; and then sliding the fixed mounting block 217 into the sliding groove, and fixing the fixed mounting block 217 in the sliding groove by a worker in a welding mode after the fixed mounting block 217 slides to a designated position.

Referring to fig. 2-4, the movable guiding roller 22 is rotatably connected between two movable sliding blocks 216, the fixed guiding roller 23 is rotatably connected between two mounting blocks 217, a first elastic member 218 is disposed in the sliding groove, the first elastic member 218 is located at a side of the movable sliding blocks 216 facing away from the movable sliding blocks, and the first elastic member 218 is a compression spring.

When the lithium battery diaphragm passes between the movable guide roller 22 and the fixed guide roller 23, the movable sliding block 216 has a tendency to move towards the fixed mounting block 217 under the elastic force of the first elastic piece 218, and the movable sliding block 216 drives the movable guide roller 22 to move towards the fixed guide roller 23, so that the lithium battery diaphragm is clamped between the movable guide roller 22 and the fixed guide roller 23, and the lithium battery diaphragm is regulated and smoothed.

Referring to fig. 1, the winding assembly 3 includes a winding roller 31 and a driving motor 32.

Referring to fig. 1, a winding roller 31 is rotatably coupled to the table surface 11 of the table 1, and the bottom end of the winding roller 31 passes through the table surface 11. The lower surface of the table top 11 is fixedly connected with a mounting frame 33, and the driving motor 32 is connected to the mounting frame 33 through bolts. The output shaft of the driving motor 32 is connected with a driving pulley 321, one end of the winding roller 31 penetrating through the table top 11 is connected with a driven pulley 322, a transmission belt 323 is connected between the driving pulley 321 and the driven pulley 322, and the driving motor 32 drives the winding roller 31 to transmit in a belt transmission mode.

Referring to fig. 5, the winding roller 31 has an installation hole 311 formed therein along the axial direction, and a lead-out port 312 communicating with the installation hole 311 is formed in the side wall of the winding roller 31. The tip of the outlet 312 penetrates the tip of the winding roller 31, a space is provided between the bottom of the outlet 312 and the bottom of the winding roller 31, and three outlets 312 are opened along the circumferential direction of the winding roller 31.

Referring to fig. 5, a pressure receiving piece 313 is provided in the mounting hole 311, and the pressure receiving piece 313 is provided in one-to-one correspondence with the outlet 312. A top support piece 314 extending into the outlet 312 is integrally formed on each of the pressed pieces 313. An ejection air bag 315 is arranged in the installation inner hole 311, the ejection air bag 315 is positioned among the three pressed sheets 313, the outer side wall of the ejection air bag 315 is attached to one side of the pressed sheets 313, which is away from the top support sheets 314, the top of the ejection air bag 315 is communicated with an air inlet 3151, the air inlet 3151 is made of flexible rubber, and the air inlet 3151 can be fastened through a binding belt.

Referring to fig. 5 and 6, each top support 314 is provided with a relief port 3141, and a tightening elastic ring 316 is provided in the mounting inner hole 311, the tightening elastic ring 316 is made of rubber, and the tightening elastic ring 316 passes through each relief port 3141.

Before winding the lithium battery separator, the ejector balloon 315 is not filled with gas, and the ejector balloon 315 is in a contracted state. At this time, the worker sets the core tube around which the lithium battery separator is wound outside the winding roller 31, then, fills air into the ejection air bag 315 through the air inlet 3151, ejects the ejector blade 314 out of the outlet 312 by the ejection air bag 315, and tightens the air inlet 3151 by the ligature band when the ejector blade 314 abuts against the inner side wall of the core tube.

Then, the driving motor 32 starts to work, and the driving motor 32 drives the winding roller 31 to rotate so as to wind the lithium battery diaphragm. When the winding is completed, the worker stops driving the motor 32, and then opens the ligature tape on the air inlet 3151, the gas in the ejector balloon 315 is released, and the ejector balloon 315 is in a contracted state. At this time, the elastic force of the tightening elastic ring 316 urges the respective jack-up pieces 314 into the outlet 312, the jack-up pieces 314 are separated from the inner side wall of the core barrel, and the worker takes out the core barrel wound with the lithium battery separator from the winding roller 31.

Referring to fig. 1, the side pressure assembly 4 includes a support base 41 and a side pressure roller 42.

Referring to fig. 1, a mating groove 111 is formed on the upper surface of the table top 11, and a support seat 41 is positioned in the mating groove 111, and the upper surface of the support seat 41 and the upper surface of the table top 11 are positioned on the same horizontal plane. The side pressure roller 42 is rotatably connected to the support base 41, and the side pressure roller 42 has a tendency to move toward the winding roller 31.

Referring to fig. 7 and 8, the support base 41 includes a connection base 411 and an upper slide base 412. The connecting base 411 is fixedly connected to the bottom of the matching groove 111, the upper surface of the connecting base 411 is fixedly connected with two dovetail guide rails 413, two dovetail guide grooves 414 which are matched with the guide rails in a sliding manner are formed in the upper sliding base 412, and the upper sliding base 412 is connected to the connecting base 411 in a sliding manner through the matching of the dovetail guide rails 413 and the dovetail guide grooves 414.

Referring to fig. 7 and 8, the side pressing roller 42 is rotatably connected to the upper sliding seat 412, a sliding guide rail 415 is connected to a surface of the upper sliding seat 412 facing the connection base 411, a sliding guide groove 416 for sliding the sliding guide rail 415 is opened on a surface of the connection base 411 facing the upper sliding seat 412, a baffle 418 is fixedly connected to one end of the sliding guide groove 416, a second elastic member 417 for driving the upper sliding seat 412 to move toward the winding roller 31 is provided between the baffle 418 and the sliding guide rail 415, and the second elastic member 417 is a compression spring.

In the process of winding the winding roller 31, the elastic force of the second elastic piece 417 drives the upper sliding seat 412 to move towards the winding roller 31, the upper sliding seat 412 drives the side pressing roller 42 to move towards the winding roller 31, and the side pressing roller 42 is tightly attached to the lithium battery diaphragm wound outside the core barrel, so that the lithium battery diaphragm is smoothed.

The working process of the embodiment of the utility model is as follows:

s1, before winding, the ejection air bag 315 is not filled with air, and the ejection air bag 315 is in a contracted state. At this time, the worker sets the core tube around which the lithium battery separator is wound outside the winding roller 31, then, fills air into the ejection air bag 315 through the air inlet 3151, ejects the ejector blade 314 out of the outlet 312 by the ejection air bag 315, and tightens the air inlet 3151 by the ligature band when the ejector blade 314 abuts against the inner side wall of the core tube.

S2, a worker passes the lithium battery diaphragm between the movable guide roller 22 and the fixed guide roller 23, at this time, the movable sliding block 216 has a trend of moving towards the fixed installation block 217 under the action of the elastic force of the first elastic piece 218, and the movable sliding block 216 drives the movable guide roller 22 to move towards the fixed guide roller 23, so that the lithium battery diaphragm is clamped between the movable guide roller 22 and the fixed guide roller 23, and the lithium battery diaphragm is regulated and smoothed. The lithium battery separator is pulled to the core barrel after passing between the movable guide roller 22 and the fixed guide roller 23.

S3, a worker starts a driving motor 32, and the driving motor 32 drives a winding roller 31 to rotate so as to wind the lithium battery diaphragm. In the winding process, the elastic force of the second elastic piece 417 drives the upper sliding seat 412 to move towards the winding roller 31, and the upper sliding seat 412 drives the side pressing roller 42 to move towards the winding roller 31, so that the side pressing roller 42 is tightly attached to the lithium battery diaphragm wound outside the core barrel, and the smoothing of the lithium battery diaphragm is realized again.

S4, when the winding is completed, a worker stops driving the motor 32, then opens the binding belt on the air inlet 3151, releases the air in the ejection air bag 315, and the ejection air bag 315 is in a contracted state. At this time, the elastic force of the tightening elastic ring 316 urges the respective jack-up pieces 314 into the outlet 312, the jack-up pieces 314 are separated from the inner side wall of the core barrel, and the worker takes out the core barrel wound with the lithium battery separator from the winding roller 31.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (7)

1. A lithium battery separator winding apparatus, characterized in that: the lithium battery separator comprises a workbench (1), a guide assembly (2), a winding assembly (3) and a side pressure assembly (4), wherein the guide assembly (2), the winding assembly (3) and the side pressure assembly (4) are arranged on the workbench (1), the guide assembly (2) comprises a support frame (21), a movable guide roller (22) and a fixed guide roller (23), the fixed guide roller (23) and the movable guide roller (22) are respectively and rotatably connected to the support frame (21), the movable guide roller (22) has a trend of moving towards the fixed guide roller (23), and a distance for a lithium battery separator to pass is reserved between the movable guide roller (22) and the fixed guide roller (23); the winding assembly (3) comprises a winding roller (31) and a driving motor (32), the winding assembly (3) is rotatably connected to the workbench (1), and the driving motor (32) is in transmission connection with the winding roller (31); the side pressure assembly (4) comprises a supporting seat (41) and a side pressure roller (42), and the side pressure roller (42) is rotationally connected to the supporting seat (41).

2. The lithium battery separator winding apparatus according to claim 1, wherein: the support frame (21) comprises an upper mounting plate (211), a connecting plate (212) and a lower mounting seat (213), wherein the lower mounting seat (213) is connected to the workbench (1), the upper mounting plate (211) is parallel to the lower mounting seat (213), the connecting plate (212) is connected between the upper mounting plate (211) and the lower mounting seat (213), sliding grooves are respectively formed in the upper mounting plate (211) and the lower mounting seat (213), movable sliding blocks (216) and mounting blocks (217) are arranged in the sliding grooves, the movable sliding blocks (216) are connected in the sliding grooves in a sliding mode, the mounting blocks (217) are fixedly connected in the sliding grooves, a movable guide roller (22) is connected between the two movable sliding blocks (216) in a rotating mode, and a first elastic piece (218) for driving the movable sliding blocks to move towards the mounting blocks (217) is arranged in the sliding grooves.

3. A lithium battery separator winding apparatus according to claim 2, wherein: the inner side wall of the sliding groove is provided with a guide rail (215), and the side walls of the movable sliding block (216) and the mounting block (217) are respectively provided with a sliding groove which is in sliding fit with the guide rail (215).

4. The lithium battery separator winding apparatus according to claim 1, wherein: the winding roller (31) is provided with an installation inner hole (311) along the axial direction, the side wall of the winding roller (31) is provided with a lead-out opening (312) communicated with the installation inner hole (311), a pressed sheet (313) is arranged in the installation inner hole (311), a propping sheet (314) extending into the lead-out opening (312) is connected to the pressed sheet (313), an ejection air bag (315) is arranged in the installation inner hole (311), and the outer side wall of the ejection air bag (315) is attached to one side, deviating from the propping sheet (314), of the pressed sheet (313).

5. The lithium battery separator winding apparatus according to claim 4, wherein: at least three export openings (312) are formed along the circumferential direction of the winding roller (31), and three groups of pressed sheets (313) and top support sheets (314) are correspondingly arranged.

6. The lithium battery separator winding apparatus according to claim 5, wherein: the top support piece (314) is provided with a yielding port (3141), a tightening elastic ring (316) is arranged in the installation inner hole (311), and the tightening elastic ring (316) passes through each yielding port (3141).

7. The lithium battery separator winding apparatus according to claim 1, wherein: the supporting seat (41) comprises a connecting base (411) and an upper sliding seat (412), the connecting base (411) is fixedly connected to the workbench (1), the upper sliding seat (412) is connected to the connecting base (411) in a sliding mode, the side pressure roller (42) is rotationally connected to the upper sliding seat (412), the upper sliding seat (412) faces one face of the connecting base (411) and is connected with a sliding guide rail (415), the connecting base (411) faces one face of the upper sliding seat (412) and is provided with a sliding guide groove (416) for sliding of the sliding guide rail (415), and a second elastic piece (417) for driving the upper sliding seat (412) to face the winding roller (31) is arranged in the sliding guide groove (416).