Lithium battery diaphragm production line

Abstract

The lithium battery diaphragm production line comprises an extruder, a casting machine, extraction equipment, a drying machine, a winding mechanism, a cutting mechanism and a traction mechanism, the extruder is used for extruding a molten polymer solution from a die head to form a strip-shaped lithium battery diaphragm, and the casting machine is used for stretching the extruded lithium battery diaphragm to form a microporous structure; the extraction equipment is used for extracting the stretched lithium battery diaphragm and removing residual solvents and additives, the drying machine is used for drying the extracted lithium battery diaphragm, the winding mechanism is used for winding the dried lithium battery diaphragm, the cutting mechanism is arranged between the drying machine and the winding mechanism, and the cutting mechanism is used for cutting the lithium battery diaphragm. The cutting mechanism is used for cutting the lithium battery diaphragm, the traction mechanism is used for pulling the lithium battery diaphragm to the winding mechanism, and the winding mechanism in the lithium battery diaphragm production line can realize quick replacement of the winding rollers under the condition of not interrupting the production process by adopting the design of double winding rollers.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery diaphragm production, and in particular to a lithium battery diaphragm production line. Background Art

[0002] In the structure of lithium batteries, the diaphragm is one of the key inner components. The diaphragm is responsible for isolating the positive and negative electrodes of the lithium battery, preventing the positive and negative electrodes from contacting and causing a short circuit in the lithium battery. The diaphragm is porous and can allow electrolyte ions to pass through. Since the electrolyte of lithium batteries is an organic solvent system, diaphragm materials that are resistant to organic solvents are required. Generally, high-strength thin-film polyolefin porous membranes are used. The production process of lithium battery diaphragms is mainly divided into two types: dry process and wet process. The wet process can better control the pore size, distribution and porosity, so it is generally used to manufacture high-end films.

[0003] In the wet process of making lithium battery separators, the steps generally include mixing and extrusion film forming, biaxial stretching, extraction and pore forming, drying, and winding.

[0004] In the prior art, winding equipment generally uses a single winding roller for operation. After winding is completed, the winding roller needs to be removed and then a new winding roller needs to be installed, which is inefficient.

[0005] For example, a Chinese patent with announcement number CN214542451U discloses a film collecting device for lithium battery diaphragm production, which includes a film collecting device body, the film collecting device body includes a film rolling shaft movably installed at the internal center, a clamping block slidably connected between the inner walls of the film collecting device body, and a cutting knife movably installed on the inner wall of one side of the film collecting device body; a transmission mechanism is arranged inside the shell of the film collecting device body, and a hand crank is movably arranged on the outer wall of one side of the film collecting device body, and the transmission mechanism is driven by applying force to the hand crank to make the clamping block move horizontally in the direction of the film rolling shaft; a second slide groove is provided at the bottom of the film collecting device body.

[0006] The above device sets the transmission mechanism so that when the pull rope pulls the cutting knife to cut the diaphragm, the pressing block presses the film rolling shaft in the horizontal direction, thereby preventing the diaphragm at the port from rolling up and wrinkling due to tension after cutting, thereby avoiding waste of resources.

[0007] However, a single reel is still used for rewinding, and during rewinding, the diaphragm needs to be manually wound around the reel for several turns to ensure that the reel can normally rewind the diaphragm. This process is not only dangerous, but also further reduces the operating efficiency.

[0008] Therefore, a lithium battery separator production line is proposed. Summary of the invention

[0009] The object of the present invention is to provide a lithium battery separator production line, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0010] To achieve the above object, the present invention provides the following technical solution: a lithium battery separator production line, comprising:

[0011] An extruder, the extruder is used to extrude the molten polymer solution from a die head to form a strip-shaped lithium battery separator;

[0012] A tape casting machine, which is used to stretch the extruded lithium battery separator to form a microporous structure;

[0013] An extraction device, which is used to extract the stretched lithium battery separator to remove residual solvents and additives;

[0014] A dryer, which is used to dry the extracted lithium battery separator;

[0015] A winding mechanism, wherein the winding mechanism is used to wind up the dried lithium battery separator;

[0016] A splitting mechanism, the splitting mechanism is arranged between the dryer and the winding mechanism, and the splitting mechanism is used to cut the lithium battery separator;

[0017] A traction mechanism is used to pull the lithium battery separator onto a winding mechanism.

[0018] In a lithium battery separator production line according to the present invention, optionally, the winding mechanism comprises:

[0019] Swinging rack;

[0020] A winding roller, both ends of which are open, a clamping member for fixing the lithium battery diaphragm on the winding roller is provided on the winding roller, and the inner walls at both ends of the winding roller are fixedly connected to the limit blocks, and two winding rollers are provided, and the two winding rollers are respectively arranged at the two ends of the swing frame;

[0021] A disassembly and assembly mechanism, the disassembly and assembly mechanism is used to install the winding roller on the swing frame, and the disassembly and assembly mechanism is provided in two groups, and the two groups of the disassembly and assembly mechanism are respectively arranged at two ends of the swing frame;

[0022] The extrusion mechanism is arranged on the swing frame, and the extrusion mechanism is used to extrude the lithium battery diaphragm wound on the winding roller so that the lithium battery diaphragm can be tightly wound on the winding roller.

[0023] In a lithium battery diaphragm production line according to the present invention, optionally, the swing frame includes a mounting frame, the inner upper end of the mounting frame is rotatably connected to a connecting shaft, both ends of the connecting shaft are fixedly connected to support beams, one side of the mounting frame is hinged with a hydraulic cylinder, and the end of the telescopic rod of the hydraulic cylinder is hinged to one side of the connecting shaft.

[0024] In a lithium battery diaphragm production line according to the present invention, optionally, the two groups of disassembly and assembly mechanisms each include two mounting plates, the two mounting plates are respectively fixed at one end of the two support beams, both ends of the support beams are rotatably mounted with a rotating sleeve through a seat bearing, a clamp is slidably arranged inside the rotating sleeve, a clamp is provided on the outer wall of the clamp, one end of the clamp can pass through the inside of the rotating sleeve and then extend into the inside of the winding roller, so that the limit block is clamped in the clamping groove, a limit sliding groove is provided on the inner wall of the rotating sleeve, a limit sliding groove is fixedly connected to the outer wall of the clamp, the limit sliding groove is slidably arranged inside the limit sliding groove, and a third electric The chuck is slidably mounted on the piston rod, and a first spring is mounted on the piston rod. One end of the first spring abuts against one end of the rotating sleeve, and the other end of the first spring abuts against one end of the chuck. A baffle is fixedly connected to one end of the piston rod close to the chuck. By controlling the piston rod of the third electric push rod to retract, the baffle squeezes the chuck and receives the chuck into the rotating sleeve. At this time, the first spring is in a compressed state. By controlling the piston rod of the third electric push rod to extend, one end of the chuck is squeezed out of the rotating sleeve under the elastic force of the first spring.

[0025] In a lithium battery diaphragm production line according to the present invention, optionally, the clamping member includes a pressure plate, which is arranged in an arc shape and can be fitted on the outer wall of the winding roller, the winding roller is provided with a strip hole connected to the interior of the winding roller, and the interior of the winding roller is provided with a swing plate, the upper end of the swing plate passes through the strip hole and is fixedly connected to one end of the pressure plate, the swing plate is rotatably connected in the strip hole, the end of the piston rod is arranged in a cone shape, and by controlling the extension of the piston rod of the third electric push rod, the piston rod can continuously squeeze the inner side surface of the swing plate, so that the lower end of the swing plate moves toward the inner wall direction of the winding roller, and then the pressure plate rotates toward the surface of the winding roller, thereby pressing the lithium battery diaphragm against the winding roller, and there is rolling contact between the swing plate and the piston rod.

[0026] In a lithium battery diaphragm production line according to the present invention, optionally, a driving motor is fixedly installed on the bottom of one of the mounting plates on the disassembly and assembly mechanism, a second gear is fixedly connected to the rotating shaft of the driving motor, a first gear is fixedly sleeved on the rotating sleeve close to the driving motor, and the first gear is meshed with the second gear.

[0027] In a lithium battery diaphragm production line according to the present invention, optionally, the dividing mechanism includes two vertical plates, a cross beam is fixedly connected between the two vertical plates, a first electric push rod is fixedly installed on the cross beam, a first movable seat is movably arranged below the cross beam, the bottom of the telescopic rod of the first electric push rod is fixedly connected to the top of the first movable seat, a first linear module is fixedly installed on one side of the first movable seat, a laser cutting machine is fixedly installed on the slide table of the first linear module, a cutting seat is fixedly installed between the two vertical plates, the cutting seat is located directly below the first movable seat, a first guide rod is fixedly connected to the top of the first movable seat, a first guide sleeve is fixedly connected to the top of the cross beam, the upper end of the first guide rod slides through the first guide sleeve, and the lithium battery diaphragm can be pressed onto the cutting seat by controlling the extension of the telescopic rod of the first electric push rod, and the laser cutting machine is driven to move by controlling the first linear module, so that the laser cutting machine can perform linear cutting on the lithium battery diaphragm, and notches are provided at both ends of the cutting seat.

[0028] In a lithium battery separator production line according to the present invention, optionally, a guide roller is rotatably connected between the two vertical plates.

[0029] In a lithium battery diaphragm production line according to the present invention, optionally, the traction mechanism includes two second linear modules and a support frame, the two second linear modules are respectively fixed on the corresponding side surfaces of the vertical plate, the lower ends of both sides of the support frame are respectively fixed on the slides of the corresponding second linear modules, a second electric push rod is fixedly installed on the top of the support frame, the bottom of the telescopic rod of the second electric push rod slides through the support frame and is fixedly connected to a second movable seat, pneumatic fingers are fixedly installed on both ends of the second movable seat, a second guide rod is fixedly connected to the top of the second movable seat, a second guide sleeve is fixedly connected to the top of the support frame, and the upper end of the second guide rod slides through the second guide sleeve.

[0030] In a lithium battery separator production line according to the present invention, optionally, the extrusion mechanism includes a horizontal plate and a U-shaped seat. The horizontal plate is fixed between the two support beams. An extrusion roller is rotatably installed inside the U-shaped seat. A third guide rod is fixedly connected to the outside of the U-shaped seat. One end of the third guide rod slidably penetrates the horizontal plate. A second spring is sleeved on the third guide rod. One end of the second spring abuts against one side of the horizontal plate, and the other end of the second spring abuts against one side of the U-shaped seat.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] By adopting the double take-up roll design, the take-up mechanism in the lithium battery separator production line can achieve the rapid replacement of the take-up roll without interrupting the production process, avoiding the low efficiency problem of frequent shutdown and replacement of the traditional single take-up roll, thus significantly improving the production efficiency of the lithium battery separator;

[0033] The disassembly and assembly mechanism provided can achieve the rapid disassembly and assembly of the take-up roll;

[0034] Through the traction mechanism provided, in cooperation with the pressing member and the third electric push rod in the disassembly and assembly mechanism, the automatic traction and pressing of the separator are realized, avoiding the safety risks brought by manual operation

[0035] The design of the extrusion mechanism enables the lithium battery separator to be tightly wound around the take-up roll during the winding process, avoiding problems such as wrinkles and looseness caused by uneven tension, thus ensuring the flatness and quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of a lithium battery separator production line of the present invention;

[0037] Figure 2 is one of the schematic structural diagrams of the slitting mechanism in a lithium battery separator production line of the present invention;

[0038] Figure 3 is another schematic structural diagram of the slitting mechanism in a lithium battery separator production line of the present invention;

[0039] Figure 4 is the third schematic structural diagram of the slitting mechanism in a lithium battery separator production line of the present invention;

[0040] Figure 5 is Figure 4 the enlarged structural schematic diagram of part A in;

[0041] Figure 6 is a schematic structural diagram of the take-up mechanism in a lithium battery separator production line of the present invention;

[0042] Figure 7This is one of the partial structural schematic diagrams of a winding mechanism in a lithium battery separator production line of the present invention;

[0043] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of part B in FIG.

[0044] Fig. 9 This is a second partial structural schematic diagram of a winding mechanism in a lithium battery separator production line of the present invention;

[0045] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure of part C;

[0046] Fig.11 It is a partial cross-sectional structural schematic diagram of a disassembly and assembly mechanism in a lithium battery separator production line of the present invention;

[0047] Fig.12 It is a schematic cross-sectional structure diagram of a winding roller in a lithium battery separator production line of the present invention;

[0048] Fig.13 The present invention is a schematic diagram of the cross-sectional structure of a lithium battery diaphragm production line when a pressing block presses the diaphragm onto a winding roller.

[0049] In the figure: 1. Extruder; 2. Casting machine; 3. Extraction equipment; 4. Dryer;

[0050] 5. Splitting mechanism; 501. Vertical plate; 502. Crossbeam; 5021. First guide sleeve; 503. First electric push rod; 504. First moving seat; 5041. First guide rod; 505. Cutting seat; 5051. Notch; 506. First linear module; 507. Laser cutting machine; 508. Guide roller;

[0051] 6. Traction mechanism; 601. Second linear module; 602. Slide rail; 603. Support frame; 604. Lifting mechanism; 6041. Second electric push rod; 6042. Second moving seat; 6043. Second guide rod; 6044. Second guide sleeve; 605. Pneumatic finger;

[0052] 7. Lithium battery separator;

[0053] 8. Winding mechanism; 801. Mounting frame; 802. Support beam; 803. Connecting shaft;

[0054] 804, winding roller; 8041, limiting block; 8042, strip hole; 8043, pressing plate; 8044, swing plate; 8045, limiting plate;

[0055] 805. Disassembly and assembly mechanism; 8051. Mounting plate; 8052. Third electric push rod; 80521. Piston rod; 80522. Baffle; 8053. Rotating sleeve; 80531. Limit chute; 8054. Chuck; 80541. Limit slider; 80542. Card slot; 8055. First spring; 8056. First gear; 8057. Driving motor; 8058. Second gear;

[0056] 806. Extrusion mechanism; 8061. Horizontal plate; 8062. Third guide rod; 8063. C-shaped seat; 8064. Extrusion roller; 8065. Second spring;

[0057] 807. Hydraulic cylinder. Specific implementation mode

[0058] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation modes.

[0059] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation of this patent; in order to better illustrate the embodiments of the present invention, some components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the dimensions of actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0060] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0061] In the description of the present invention, unless otherwise clearly specified and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] Embodiment 1

[0063] Please refer to Figures 1 to 13 The present embodiment provides a lithium battery separator production line, including an extruder 1, a casting machine 2, an extraction device 3, a dryer 4, a splitting mechanism 5, a traction mechanism 6 and a winding mechanism 8.

[0064] The extruder 1 is used to extrude the molten polymer solution from the die head to form a strip-shaped lithium battery separator 7;

[0065] The tape casting machine 2 is used to stretch the extruded lithium battery separator 7 to form a microporous structure;

[0066] Extraction equipment 3, the extraction equipment 3 is used to extract the stretched lithium battery separator 7 to remove residual solvents and additives;

[0067] The dryer 4 is used to dry the extracted lithium battery separator 7;

[0068] A winding mechanism 8, the winding mechanism 8 is used to wind up the dried lithium battery separator 7;

[0069] The splitting mechanism 5 is arranged between the dryer 4 and the winding mechanism 8, and the splitting mechanism 5 is used to split the lithium battery separator 7;

[0070] The traction mechanism 6 is used to pull the lithium battery separator 7 onto the winding mechanism 8 .

[0071] In this embodiment, the winding mechanism 8 includes a swing frame, a winding roller 804, a disassembly mechanism 805 and a squeezing mechanism 806;

[0072] Both ends of the winding roller 804 are open, and a clamping member for fixing the lithium battery separator 7 on the winding roller 804 is provided on the winding roller 804. The inner walls at both ends of the winding roller 804 are fixedly connected to the limit blocks 8041. There are two winding rollers 804, which are respectively arranged at the two ends of the swing frame;

[0073] The disassembly and assembly mechanism 805 is used to install the winding roller 804 on the swing frame. The disassembly and assembly mechanism 805 is provided with two groups, and the two groups of disassembly and assembly mechanism 805 are respectively provided at the two ends of the swing frame;

[0074] The squeezing mechanism 806 is disposed on the swing frame, and is used to squeeze the lithium battery separator 7 wound on the winding roller 804 , so that the lithium battery separator 7 can be tightly wound on the winding roller 804 .

[0075] Specifically, the swing frame includes a mounting frame 801, the inner upper end of the mounting frame 801 is rotatably connected to a connecting shaft 803, both ends of the connecting shaft 803 are fixedly connected to a support beam 802, one side of the mounting frame 801 is hinged with a hydraulic cylinder 807, and the end of the telescopic rod of the hydraulic cylinder 807 is hinged to one side of the connecting shaft 803.

[0076] When the winding roller 804 at one end of the swing frame finishes winding the lithium battery separator 7, at this time, the telescopic rod of the hydraulic cylinder 807 is controlled to retract, so that the wound winding roller 804 descends, and at the same time, the winding roller 804 at the other end of the swing frame rises for winding operation, realizing uninterrupted winding operation.

[0077] In this embodiment, the extrusion mechanism 806 includes a cross plate 8061 and a U-shaped seat 8063. The cross plate 8061 is fixed between two support beams 802. An extrusion roller 8064 is rotatably installed inside the U-shaped seat 8063. A third guide rod 8062 is fixedly connected to the outside of the U-shaped seat 8063. One end of the third guide rod 8062 slidably penetrates through the cross plate 8061. A second spring 8065 is sleeved on the third guide rod 8062. One end of the second spring 8065 abuts against one side of the cross plate 8061, and the other end of the second spring 8065 abuts against one side of the U-shaped seat 8063. The lithium battery separator 7 on the winding roller 804 can be extruded by the provided extrusion roller 8064. As the diameter of the lithium battery separator roll continuously increases, the second spring 8065 is continuously extruded. That is to say, this structure can change synchronously with the increase in the diameter of the lithium battery separator roll, so as to ensure that the lithium battery separator 7 is tightly wound on the winding roller 804.

[0078] Specifically, in the present embodiment, the two groups of disassembly and assembly mechanisms 805 each include two mounting plates 8051, and the two mounting plates 8051 are respectively fixed on one end of the two support beams 802, and both ends of the support beams 802 are rotatably mounted with a rotating sleeve 8053 through a seat bearing, and a clamping head 8054 is slidably arranged inside the rotating sleeve 8053, and a clamping groove 80542 is provided on the outer wall of the clamping head 8054, and one end of the clamping head 8054 can pass through the interior of the rotating sleeve 8053 and then extend into the interior of the winding roller 804, so that the limit block 8041 is clamped into the clamping groove 80542, and a limit sliding groove 80531 is provided on the inner wall of the rotating sleeve 8053, and the outer wall of the clamping head 8054 is fixedly connected to the limit sliding block 80541, and the limit sliding block 80541 is slidably arranged inside the limit sliding groove 80531, and the bottom of the mounting plate 8051 is fixedly connected to the third electric push rod 8052, and the third electric push rod One end of the piston rod 80521 of 8052 slides through the rotating sleeve 8053, and the clamping head 8054 is slidably sleeved on the piston rod 80521. A first spring 8055 is sleeved on the piston rod 80521, and one end of the first spring 8055 abuts against one end of the rotating sleeve 8053, and the other end of the first spring 8055 abuts against one end of the clamping head 8054. A baffle 80522 is fixedly connected to the end of the piston rod 80521 close to the clamping head 8054. By controlling the piston rod 80521 of the third electric push rod 8052 to retract, the baffle 80522 squeezes the clamping head 8054 and puts the clamping head 8054 into the rotating sleeve 8053. At this time, the first spring 8055 is in a compressed state. By controlling the piston rod 80521 of the third electric push rod 8052 to extend, one end of the clamping head 8054 is squeezed out of the rotating sleeve 8053 by the elastic force of the first spring 8055.

[0079] By adopting the above technical solution, when installing the winding roller 804, the winding roller 804 is placed between the two rotating sleeves 8053, and then the piston rod 80521 of the third electric push rod 8052 is controlled to extend. At this time, one end of the clamping head 8054 is squeezed out of the rotating sleeve 8053 by the elastic force of the first spring 8055, so that the clamping head 8054 extends into the winding roller 804, and at the same time, the limit block 8041 is clamped into the clamping groove 80542, thereby completing the installation of the winding roller 804; when disassembling the winding roller 804, the piston rod 80521 of the third electric push rod 8052 is controlled to retract, and the baffle 80522 squeezes the clamping head 8054, so that the clamping head 8054 is received into the rotating sleeve 8053.

[0080] In this embodiment, the pressing member includes a pressing plate 8043, which is arranged in an arc shape. The pressing plate 8043 can be attached to the outer wall of the winding roller 804. The winding roller 804 is provided with a strip hole 8042 connected to the inside of the winding roller 804. The winding roller 804 is provided with a swing plate 8044. The upper end of the swing plate 8044 passes through the strip hole 8042 and is fixedly connected to one end of the pressing plate 8043. The swing plate 8044 is rotatably connected in the strip hole 8042, and the piston rod The end of 80521 is set in a cone shape. By controlling the extension of the piston rod 80521 of the third electric push rod 8052, the piston rod 80521 can continuously squeeze the inner side of the swing plate 8044, so that the lower end of the swing plate 8044 moves toward the inner wall of the winding roller 804, and then the pressure plate 8043 rotates toward the surface of the winding roller 804, thereby pressing the lithium battery diaphragm 7 against the winding roller 804, and there is rolling contact between the swing plate 8044 and the piston rod 80521.

[0081] By adopting the above technical solution, when the lithium battery diaphragm 7 needs to be pressed against the winding roller 804, it is only necessary to control the piston rod 80521 of the third electric push rod 8052 to continue to extend. Since the end of the piston rod 80521 is set in a cone shape, the piston rod 80521 can continuously squeeze the inner side surface of the swing plate 8044, so that the lower end of the swing plate 8044 moves toward the inner wall of the winding roller 804, and then the pressure plate 8043 rotates toward the surface of the winding roller 804, thereby pressing the lithium battery diaphragm 7 against the winding roller 804, and no manual winding operation is required.

[0082] In this embodiment, a driving motor 8057 is fixedly installed at the bottom of one of the mounting plates 8051 on the disassembly and assembly mechanism 805, a second gear 8058 is fixedly connected to the rotating shaft of the driving motor 8057, a first gear 8056 is fixedly sleeved on the rotating sleeve 8053 close to the driving motor 8057, and the first gear 8056 is meshed with the second gear 8058. By controlling the driving motor 8057 to start, the rotating sleeve 8053 can be driven to rotate, and since the winding roller 804 is clamped between the two rotating sleeves 8053, the rotating rotating sleeve 8053 can drive the winding roller 804 to rotate.

[0083] The swing plate 8044 has a certain angle with the vertical direction in a natural state, so that the piston rod 80521 can extend into and squeeze it. In order to prevent the angle between the swing plate 8044 and the vertical direction from becoming smaller due to shaking, the upper end of the swing plate 8044 is fixedly connected to a limit plate 8045. The limit plate 8045 can be against the inner wall of the winding roller 804, so that the swing plate 8044 is guaranteed to have a certain angle with the vertical direction.

[0084] In this embodiment, the dividing mechanism 5 includes two vertical plates 501, a crossbeam 502 is fixedly connected between the two vertical plates 501, a first electric push rod 503 is fixedly installed on the crossbeam 502, a first movable seat 504 is movably arranged below the crossbeam 502, the bottom of the telescopic rod of the first electric push rod 503 is fixedly connected to the top of the first movable seat 504, a first linear module 506 is fixedly installed on one side of the first movable seat 504, a laser cutting machine 507 is fixedly installed on the slide of the first linear module 506, a cutting seat 505 is fixedly installed between the two vertical plates 501, the cutting seat 505 is located directly below the first movable seat 504, a first guide rod 5041 is fixedly connected to the top of the first movable seat 504, and the crossbeam 502 is fixedly connected to the bottom of the telescopic rod of the first electric push rod 503. A first guide sleeve 5021 is fixedly connected to the top, and the upper end of the first guide rod 5041 slides through the first guide sleeve 5021. A guide roller 508 is rotatably connected between the two vertical plates 501. Two guide rollers 508 are provided. The two guide rollers 508 are arranged on both sides of the cutting seat 505, so that the lithium battery diaphragm 7 can be in a parallel state with the cutting seat 505 to ensure the cutting quality. By controlling the extension of the telescopic rod of the first electric push rod 503, the lithium battery diaphragm 7 can be pressed onto the cutting seat 505. By controlling the first linear module 506 to drive the laser cutting machine 507 to move, the laser cutting machine 507 can perform linear cutting on the lithium battery diaphragm 7. Notches 5051 are provided at both ends of the cutting seat 505.

[0085] In this embodiment, the traction mechanism 6 includes two second linear modules 601 and a support frame 603. The two second linear modules 601 are respectively fixed on the sides of the corresponding vertical plates 501. The lower ends of the two sides of the support frame 603 are respectively fixed on the slides of the corresponding second linear modules 601. The sides of the vertical plates 501 are fixedly connected with slide rails 602. The lower ends of the support frames 603 are fixedly connected with slide seats. The slide seats are slidably arranged on the slide rails 602. A second electric push rod 6041 is fixedly installed on the top of the support frame 603. The bottom of the telescopic rod of the second electric push rod 6041 slides through the support frame 603 and is fixedly connected with a second movable seat 6042. Pneumatic fingers 605 are fixedly installed on both ends of the second movable seat 6042. A second guide rod 6043 is fixedly connected to the top of the second movable seat 6042. A second guide sleeve 6044 is fixedly connected to the top of the support frame 603. The upper end of the second guide rod 6043 slides through the second guide sleeve 6044.

[0086] By adopting the above technical solution, when the lithium battery diaphragm 7 needs to be pulled onto the winding roller 804, the telescopic rod of the second electric push rod 6041 is first controlled to extend, so that the pneumatic finger 605 and the notch 5051 are at the same height, and the second linear module 601 is controlled to drive the support frame 603 to move toward the direction of the cutting seat 505, so that the pneumatic finger 605 moves into the notch 5051. At this time, the lithium battery diaphragm 7 is located on the inner side of the pneumatic finger 605, and then the lithium battery diaphragm 7 is clamped by the pneumatic finger 605, and then the second linear module 601 is controlled to drive the lithium battery diaphragm 7 to move toward the winding roller 804, and the lithium battery diaphragm 7 is moved between the pressure plate 8043 and the outer wall of the winding roller 804. In this embodiment, the distance between the two pneumatic fingers 605 is greater than the length of the pressure plate 8043.

[0087] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below.

[0088] Working principle: When in use, the winding roller 804 is placed between the two rotating sleeves 8053, and then the piston rod 80521 of the rotating sleeve 8053 is controlled to extend, so that the baffle 80522 releases the squeeze on the clamping head 8054. At this time, one end of the clamping head 8054 is squeezed out of the rotating sleeve 8053 by the elastic force of the first spring 8055, so that the clamping head 8054 extends into the winding roller 804, and at the same time, the limit block 8041 is clamped into the clamping groove 80542, thereby completing the installation of the winding roller 804. When the other winding roller 804 is wound up, the telescopic rod of the first electric push rod 503 is controlled to extend, so that the lithium battery can be put in. The diaphragm 7 is pressed on the cutting seat 505, and the laser cutting machine 507 is driven to move by controlling the first linear module 506, so that the laser cutting machine 507 can perform linear cutting on the lithium battery diaphragm 7, and then the telescopic rod of the hydraulic cylinder 807 is controlled to retract, and the rolled lithium battery diaphragm 7 is put down, and the new winding roller 804 is raised at the same time. At this time, the rolled winding roller 804 is removed and the new winding roller 804 is installed. At the same time, the telescopic rod of the second electric push rod 6041 is controlled to extend, so that the pneumatic finger 605 is at the same height as the notch 5051, and the second linear module 601 is controlled to drive the support frame 603 toward the cutting seat 505. The pneumatic finger 605 moves to the notch 5051, and the lithium battery diaphragm 7 is located on the inner side of the pneumatic finger 605. The pneumatic finger 605 then clamps the lithium battery diaphragm 7. The second linear module 601 is then controlled to drive the lithium battery diaphragm 7 to move in the direction of the winding roller 804, and the lithium battery diaphragm 7 is moved between the pressure plate 8043 and the outer wall of the winding roller 804. The piston rod 80521 of the third electric push rod 8052 is then controlled to continue to extend. Since the end of the piston rod 80521 is tapered, the piston rod 80521 can continuously squeeze the inner side of the swing plate 8044, so that the swing plate 8044 is moved to the inner side of the swing plate 8044. The lower end of plate 8044 moves toward the inner wall of the winding roller 804, so that the pressure plate 8043 rotates toward the surface of the winding roller 804, thereby pressing the lithium battery diaphragm 7 against the winding roller 804, and then controlling the drive motor 8057 to start, thereby driving the winding roller 804 to rotate, so that the lithium battery diaphragm 7 can be quickly wound on the winding roller 804. After winding seven circles, the piston rod 80521 of the third electric push rod 8052 is controlled to retract a distance, so that the piston rod 80521 is no longer in contact with the swing plate 8044, thereby reducing the wear of the piston rod 80521, and at the same time, the clamping head 8054 is still stuck in the winding roller 804.

[0089] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery separator production line, characterized in that: include: An extruder (1), wherein the extruder (1) is used to extrude a molten polymer solution from a die head to form a strip-shaped lithium battery separator (7); A tape casting machine (2), wherein the tape casting machine (2) is used to perform a stretching treatment on an extruded lithium battery separator (7) to form a microporous structure; An extraction device (3), wherein the extraction device (3) is used to extract the stretched lithium battery separator (7) to remove residual solvents and additives; A dryer (4), wherein the dryer (4) is used to dry the extracted lithium battery separator (7); A winding mechanism (8), wherein the winding mechanism (8) is used to wind up the dried lithium battery separator (7); A splitting mechanism (5), the splitting mechanism (5) being arranged between the drying machine (4) and the winding mechanism (8), the splitting mechanism (5) being used for cutting the lithium battery separator (7); A traction mechanism (6), wherein the traction mechanism (6) is used to pull the lithium battery separator (7) onto a winding mechanism (8).

2. A lithium battery separator production line according to claim 1, characterized in that: The winding mechanism (8) comprises: Swinging rack; A winding roller (804), both ends of the winding roller (804) are opened, a clamping member for fixing the lithium battery separator (7) on the winding roller (804) is arranged on the winding roller (804), and the inner walls at both ends of the winding roller (804) are fixedly connected to the limiting blocks (8041), and two winding rollers (804) are arranged, and the two winding rollers (804) are respectively arranged at the two ends of the swing frame; A disassembly and assembly mechanism (805), the disassembly and assembly mechanism (805) is used to install the winding roller (804) on the swing frame, and the disassembly and assembly mechanism (805) is provided in two groups, and the two groups of disassembly and assembly mechanisms (805) are respectively provided at two ends of the swing frame; A squeezing mechanism (806), wherein the squeezing mechanism (806) is arranged on the swing frame, and the squeezing mechanism is used to squeeze the lithium battery diaphragm (7) wound on the winding roller (804), so that the lithium battery diaphragm (7) can be tightly wound on the winding roller (804).

3. A lithium battery separator production line according to claim 2, characterized in that: The swing frame comprises a mounting frame (801), the inner upper end of the mounting frame (801) is rotatably connected to a connecting shaft (803), both ends of the connecting shaft (803) are fixedly connected to a support beam (802), one side of the mounting frame (801) is hinged to a hydraulic cylinder (807), and the end of the telescopic rod of the hydraulic cylinder (807) is hinged to one side of the connecting shaft (803).

4. A lithium battery separator production line according to claim 3, characterized in that: The two groups of disassembly and assembly mechanisms (805) each include two mounting plates (8051), the two mounting plates (8051) are respectively fixed to one end of the two support beams (802), both ends of the support beams (802) are rotatably mounted with a rotating sleeve (8053) through a seat bearing, a clamping head (8054) is slidably arranged inside the rotating sleeve (8053), a clamping groove (80542) is provided on the outer wall of the clamping head (8054), and one end of the clamping head (8054) can be extended out from the inside of the rotating sleeve (8053) The rotating sleeve (8053) is provided with a limit slide groove (80531), and the outer wall of the clamping head (8054) is fixedly connected to the limit slide block (80541), and the limit slide block (80541) is slidably arranged in the limit slide groove (80531). The bottom of the mounting plate (8051) is fixedly connected to a third electric push rod (8052), and the piston rod (8052) of the third electric push rod (8052) is fixedly connected to the inner wall of the rotating sleeve (8053). One end of the piston rod (80521) slides through the rotating sleeve (8053), the clamp (8054) is slidably mounted on the piston rod (80521), a first spring (8055) is sleeved on the piston rod (80521), one end of the first spring (8055) abuts against one end of the rotating sleeve (8053), the other end of the first spring (8055) abuts against one end of the clamp (8054), and the end of the piston rod (80521) close to the clamp (8054) is fixedly connected with a baffle (80522) ), by controlling the piston rod (80521) of the third electric push rod (8052) to retract, the baffle (80522) squeezes the clamping head (8054) to receive the clamping head (8054) into the rotating sleeve (8053), at which time the first spring (8055) is in a compressed state, and by controlling the piston rod (80521) of the third electric push rod (8052) to extend, at which time one end of the clamping head (8054) is squeezed out of the rotating sleeve (8053) by the elastic force of the first spring (8055).

5. A lithium battery separator production line according to claim 4, characterized in that: The clamping member includes a pressing plate (8043), which is arranged in an arc shape. The pressing plate (8043) can be attached to the outer wall of the winding roller (804), and the winding roller (804) is provided with a strip hole (8042) connected to the inside of the winding roller (804). The winding roller (804) is provided with a swing plate (8044) inside, and the upper end of the swing plate (8044) passes through the strip hole (8042) and is fixedly connected to one end of the pressing plate (8043). The swing plate (8044) is rotatably connected in the strip hole (8042). The end of the plug rod (80521) is set in a conical shape. By controlling the extension of the piston rod (80521) of the third electric push rod (8052), the piston rod (80521) can continuously squeeze the inner side surface of the swing plate (8044), so that the lower end of the swing plate (8044) moves toward the inner wall of the winding roller (804), thereby causing the pressure plate (8043) to rotate toward the surface of the winding roller (804), thereby pressing the lithium battery diaphragm (7) against the winding roller (804), and there is rolling contact between the swing plate (8044) and the piston rod (80521).

6. A lithium battery separator production line according to claim 5, characterized in that: A driving motor (8057) is fixedly mounted on the bottom of one of the mounting plates (8051) on the disassembly and assembly mechanism (805), a second gear (8058) is fixedly connected to the rotating shaft of the driving motor (8057), a first gear (8056) is fixedly sleeved on the rotating sleeve (8053) close to the driving motor (8057), and the first gear (8056) is meshed with the second gear (8058).

7. A lithium battery separator production line according to claim 6, characterized in that: The dividing mechanism (5) comprises two vertical plates (501), a crossbeam (502) is fixedly connected between the two vertical plates (501), a first electric push rod (503) is fixedly installed on the crossbeam (502), a first movable seat (504) is movably arranged below the crossbeam (502), the bottom of the telescopic rod of the first electric push rod (503) is fixedly connected to the top of the first movable seat (504), a first linear module (506) is fixedly installed on one side of the first movable seat (504), a laser cutting machine (507) is fixedly installed on the slide table of the first linear module (506), a cutting seat (505) is fixedly installed between the two vertical plates (501), and the cutting seat (505) is located at the first Directly below a movable seat (504), the top of the first movable seat (504) is fixedly connected to a first guide rod (5041), the top of the crossbeam (502) is fixedly connected to a first guide sleeve (5021), the upper end of the first guide rod (5041) slides through the first guide sleeve (5021), and the lithium battery diaphragm (7) can be pressed onto the cutting seat (505) by controlling the extension of the telescopic rod of the first electric push rod (503), and the laser cutting machine (507) is driven to move by controlling the first linear module (506), so that the laser cutting machine (507) can perform linear cutting on the lithium battery diaphragm (7), and notches (5051) are provided at both ends of the cutting seat (505).

8. A lithium battery separator production line according to claim 7, characterized in that: A guide roller (508) is rotatably connected between the two vertical plates (501).

9. A lithium battery separator production line according to claim 7, characterized in that: The traction mechanism (6) comprises two second linear modules (601) and a support frame (603), the two second linear modules (601) are respectively fixed on the side surfaces of the corresponding vertical plates (501), the lower ends of both sides of the support frame (603) are respectively fixed on the slides of the corresponding second linear modules (601), a second electric push rod (6041) is fixedly installed on the top of the support frame (603), the bottom of the telescopic rod of the second electric push rod (6041) slides through the support frame (603) and is fixedly connected to a second movable seat (6042), both ends of the second movable seat (6042) are fixedly installed with pneumatic fingers (605), the top of the second movable seat (6042) is fixedly connected with a second guide rod (6043), the top of the support frame (603) is fixedly connected with a second guide sleeve (6044), and the upper end of the second guide rod (6043) slides through the second guide sleeve (6044) and is set.

10. A lithium battery separator production line according to claim 9, characterized in that: The extrusion mechanism (806) includes a horizontal plate (8061) and a U-shaped seat (8063). The horizontal plate (8061) is fixed between the two support beams (802). An extrusion roller (8064) is rotatably installed inside the U-shaped seat (8063). A third guide rod (8062) is fixedly connected to the outside of the U-shaped seat (8063). One end of the third guide rod (8062) slidably penetrates through the horizontal plate (8061). A second spring (8065) is sleeved on the third guide rod (8062). One end of the second spring (8065) abuts against one side of the horizontal plate (8061), and the other end of the second spring (8065) abuts against one side of the U-shaped seat (8063).

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