A lithium battery separator production line

Abstract

The present invention discloses a production line for lithium battery separators, which includes an extruder, a casting machine, an extraction device, a dryer, a winding mechanism, a cutting mechanism and a traction mechanism. The extruder is used to extrude the molten polymer solution from the die head to form a strip-shaped lithium battery separator. The casting machine is used to stretch the extruded lithium battery separator to form a microporous structure. The extraction device is used to extract the stretched lithium battery separator to remove residual solvents and additives. The dryer is used to dry the extracted lithium battery separator. The winding mechanism is used to wind the dried lithium battery separator. The cutting mechanism is arranged between the dryer and the winding mechanism and is used to cut the lithium battery separator. The traction mechanism is used to traction the lithium battery separator onto the winding mechanism. By adopting a double-winding roll design, the winding mechanism in the production line for lithium battery separators can realize the rapid replacement of the winding roll without interrupting the production process.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery separator production, and specifically to a lithium battery separator production line. Background Art

[0002] In the structure of a lithium battery, the separator is one of the key inner components. The separator isolates 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. Moreover, the separator has porosity and can enable electrolyte ions to pass through. Since the electrolyte of a lithium battery is an organic solvent system, a separator material resistant to organic solvents is required. Generally, a high-strength thin-film polyolefin porous membrane is used. The production process of lithium battery separators 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 production of lithium battery separators by the wet process, generally, steps such as mixing and extrusion into a film, biaxial stretching, extraction for pore formation, drying, and winding are involved.

[0004] In the prior art, the winding equipment generally uses a single winding roll for operation. After winding is completed, the winding roll needs to be removed, and then a new winding roll needs to be installed, resulting in low efficiency.

[0005] For example, a film winding device for lithium battery separator production disclosed in a Chinese patent with the publication number CN214542451U includes a film winding device main body. The film winding device main body includes a winding shaft movably installed at the center inside, a pressing block slidably connected between the inner walls of the film winding device main body, and a cutting knife movably installed on one inner wall of the film winding device main body; a transmission mechanism is provided inside the housing of the film winding device main body, and a hand crank is movably provided on the outer wall of one side of the film winding device main body. By applying a force to the hand crank, the transmission mechanism is driven to make the pressing block move in the horizontal direction towards the winding shaft; a second chute is opened at the bottom of the film winding device main body.

[0006] Through the setting of the transmission mechanism in the above device, when the pulling rope pulls the cutting knife to cut the separator, the pressing block presses towards the winding shaft in the horizontal direction, thereby avoiding the separator at the port from curling due to tension and forming wrinkles after cutting, thus avoiding waste of resources.

[0007] However, it still uses a single winding roll for winding, and during winding, it is necessary to manually wind the separator around the winding roll several times to ensure that the winding roll can normally carry out the separator winding work. This process not only has a certain degree of danger but also further reduces the operation 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 production line for lithium battery diaphragms, thereby solving or at least alleviating one or more of the above problems and other problems existing in the prior art.

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

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

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

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

[0014] A dryer, which is used to dry the lithium battery diaphragm after extraction;

[0015] A winding mechanism, which is used to wind the dried lithium battery diaphragm;

[0016] A cutting mechanism, which is arranged between the dryer and the winding mechanism, and is used to cut the lithium battery diaphragm;

[0017] A traction mechanism, which is used to traction the lithium battery diaphragm onto the winding mechanism.

[0018] In a production line for lithium battery diaphragms according to the present invention, optionally, the winding mechanism includes:

[0019] A swing frame;

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

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

[0022] An extrusion mechanism, which is arranged on the swing frame and 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 separator production line according to the present invention, optionally, the swing frame includes a mounting frame, the upper end inside the mounting frame is rotatably connected to a connecting shaft, both ends of the connecting shaft are fixedly connected with 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 with one side of the connecting shaft.

[0024] In a lithium battery separator production line according to the present invention, optionally, both of the disassembly and assembly mechanisms include two mounting plates, the two mounting plates are respectively fixed at one end of the two support beams, both ends of the support beam are rotatably installed with rotating sleeves through pedestal bearings, a chuck is slidably arranged inside the rotating sleeve, a clamping groove is formed on the outer wall of the chuck, one end of the chuck can extend out of the inside of the rotating sleeve and then extend into the inside of the winding roller, so that the limiting block is clamped into the clamping groove, a limiting sliding groove is formed on the inner wall of the rotating sleeve, a limiting sliding block is fixedly connected to the outer wall of the chuck, and the limiting sliding block is slidably arranged inside the limiting sliding groove. A third electric push rod is fixedly connected to the bottom of the mounting plate, one end of the piston rod of the third electric push rod slidably penetrates through the rotating sleeve, the chuck is slidably sleeved on the piston rod, a first spring is sleeved 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 the chuck is retracted 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 extruded out of the rotating sleeve by the elastic force of the first spring.

[0025] In a lithium battery separator production line according to the present invention, optionally, the pressing member includes a pressing plate, the pressing plate is arc-shaped, the pressing plate can be attached to the outer wall of the winding roller, a strip-shaped hole communicating with the inside of the winding roller is formed on the winding roller, a swing plate is arranged inside the winding roller, the upper end of the swing plate passes through the strip-shaped hole and is fixedly connected to one end of the pressing plate, the swing plate is rotatably connected in the strip-shaped hole, the end of the piston rod is conical. By controlling the piston rod of the third electric push rod to extend, the piston rod can continuously squeeze the inner side surface of the swing plate, so that the lower end of the swing plate moves towards the inner wall direction of the winding roller, and further the pressing plate rotates towards the surface of the winding roller, and further the lithium battery separator is pressed on the winding roller. The swing plate and the piston rod are in rolling contact.

[0026] In a lithium battery separator production line according to the present invention, optionally, a driving motor is fixedly installed at 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. The first gear meshes with the second gear.

[0027] In a lithium battery separator 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 moving 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 moving seat. A first linear module is fixedly installed on one side of the first moving 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 moving seat. The top of the first moving seat is fixedly connected to a first guiding rod. The top of the cross beam is fixedly connected to a first guiding sleeve. The upper end of the first guiding rod slidably penetrates through the first guiding sleeve. By controlling the telescopic rod of the first electric push rod to extend, the lithium battery separator can be pressed onto the cutting seat. By controlling the first linear module to drive the laser cutting machine to move, the laser cutting machine can linearly cut the lithium battery separator. Notches are formed at both ends of the cutting seat.

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

[0029] In a lithium battery separator 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 sides of the corresponding vertical plates. The lower ends of both sides of the support frame are respectively fixed on the slide tables 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 slidably penetrates through the support frame and is then fixedly connected to a second moving seat. Pneumatic fingers are fixedly installed at both ends of the second moving seat. The top of the second moving seat is fixedly connected to a second guiding rod. The top of the support frame is fixedly connected to a second guiding sleeve. The upper end of the second guiding rod slidably penetrates through the second guiding sleeve.

[0030] In a lithium battery separator production line according to the present invention, optionally, the extrusion mechanism includes a cross plate and a U-shaped seat. The cross 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 cross plate. A second spring is sleeved on the third guide rod. One end of the second spring abuts against one side of the cross 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 the traditional single take-up roll that needs to be frequently stopped for replacement, 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 take-up 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 7One of the partial structural schematic diagrams of the winding mechanism in a lithium battery separator production line of the present invention;

[0043] Figure 8 It is Figure 7 The enlarged structural schematic diagram of part B in

[0044] Figure 9 Two of the partial structural schematic diagrams of the winding mechanism in a lithium battery separator production line of the present invention;

[0045] Figure 10 It is Figure 9 The enlarged structural schematic diagram of part C in

[0046] Figure 11 The partial sectional structural schematic diagram of the disassembly and assembly mechanism in a lithium battery separator production line of the present invention;

[0047] Figure 12 The sectional structural schematic diagram of the winding roller in a lithium battery separator production line of the present invention;

[0048] Figure 13 The sectional structural schematic diagram when the diaphragm is pressed on the winding roller by the pressing block in a lithium battery separator production line of the present invention.

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

[0050] 5. Splitting mechanism; 501. Vertical plate; 502. Cross beam; 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. Limit block; 8042. Slot; 8043. Pressing plate; 8044. Swing plate; 8045. Limit plate;

[0055] 805. Disassembly and assembly mechanism; 8051. Installation 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. Detailed implementation mode

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

[0059] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present invention, some components in the 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 drawings may be omitted.

[0060] In the 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 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, so the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed 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 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 toFigures 1 to 13 , this 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 casting machine 2 is used to stretch the extruded lithium battery separator 7 to form a microporous structure;

[0066] The extraction device 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] The winding mechanism 8 is used to wind 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 slit the lithium battery separator 7;

[0070] The traction mechanism 6 is used to traction 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 and assembly mechanism 805, and a pressing mechanism 806;

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

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

[0074] The pressing mechanism 806 is arranged on the swing frame. The pressing mechanism is used to press 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 upper end inside the mounting frame 801 is rotatably connected to a connecting shaft 803. Support beams 802 are fixedly connected to both ends of the connecting shaft 803. 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.

[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 to perform the winding operation, realizing the uninterrupted winding operation.

[0077] In this embodiment, the pressing mechanism 806 includes a cross plate 8061 and a U-shaped seat 8063. The cross plate 8061 is fixed between two support beams 802. A pressing 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 pressed by the provided pressing roller 8064. As the diameter of the lithium battery separator roll continuously increases, the second spring 8065 is continuously pressed. 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 around the winding roller 804.

[0078] Specifically, in this embodiment, both sets of disassembly and assembly mechanisms 805 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 beam 802 are rotatably mounted with rotating sleeves 8053 through pedestal bearings. A chuck 8054 is slidably arranged inside the rotating sleeve 8053. A clamping groove 80542 is formed on the outer wall of the chuck 8054. One end of the chuck 8054 can extend out of the inside of the rotating sleeve 8053 and then extend into the inside of the winding roller 804, so that the limiting block 8041 is clamped into the clamping groove 80542. A limiting chute 80531 is formed on the inner wall of the rotating sleeve 8053. A limiting slider 80541 is fixedly connected to the outer wall of the chuck 8054. The limiting slider 80541 is slidably arranged inside the limiting chute 80531. A third electric push rod 8052 is fixedly connected to the bottom of the mounting plate 8051. One end of the piston rod 80521 of the third electric push rod 8052 slidably penetrates through the rotating sleeve 8053. The chuck 8054 is slidably sleeved 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, and the other end of the first spring 8055 abuts against one end of the chuck 8054. A baffle 80522 is fixedly connected to one end of the piston rod 80521 close to the chuck 8054. By controlling the piston rod 80521 of the third electric push rod 8052 to retract, the baffle 80522 squeezes the chuck 8054 to retract the chuck 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 chuck 8054 is extruded 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, place the winding roller 804 between the two rotating sleeves 8053, and then control the piston rod 80521 of the third electric push rod 8052 to extend. At this time, one end of the chuck 8054 is extruded out of the rotating sleeve 8053 by the elastic force of the first spring 8055, so that the chuck 8054 extends into the winding roller 804, and at the same time, the limiting block 8041 is clamped into the clamping groove 80542, thereby completing the installation of the winding roller 804; when disassembling the winding roller 804, control the piston rod 80521 of the third electric push rod 8052 to retract, and the baffle 80522 squeezes the chuck 8054 to retract the chuck 8054 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 splitting mechanism 5 includes two vertical plates 501. A cross beam 502 is fixedly connected between the two vertical plates 501. A first electric push rod 503 is fixedly installed on the cross beam 502. A first moving seat 504 is movably arranged below the cross beam 502. The bottom of the telescopic rod of the first electric push rod 503 is fixedly connected to the top of the first moving seat 504. A first linear module 506 is fixedly installed on one side of the first moving 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. The cutting seat 505 is located directly below the first moving seat 504. The top of the first moving seat 504 is fixedly connected to a first guide rod 5041. The top of the cross beam 502 is fixedly connected to a first guide sleeve 5021. The upper end of the first guide rod 5041 slidably penetrates through the first guide sleeve 5021. Two guide rollers 508 are rotatably connected between the two vertical plates 501. There are two guide rollers 508, and the two guide rollers 508 are arranged on both sides of the cutting seat 505, so that the lithium battery separator 7 can be in a parallel state with the cutting seat 505 to ensure the cutting quality. By controlling the telescopic rod of the first electric push rod 503 to extend, the lithium battery separator 7 can be pressed on 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 linearly cut the lithium battery separator 7. Notches 5051 are formed 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 side surfaces of the corresponding vertical plates 501. The lower ends of both sides of the support frame 603 are respectively fixed on the slide tables of the corresponding second linear modules 601. A slide rail 602 is fixedly connected to the side surface of the vertical plate 501. A slide seat is fixedly connected to the lower end of the support frame 603. The slide seat is slidably arranged on the slide rail 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 slidably penetrates through the support frame 603 and is then fixedly connected to a second moving seat 6042. Pneumatic fingers 605 are fixedly installed at both ends of the second moving seat 6042. The top of the second moving seat 6042 is fixedly connected to a second guide rod 6043. The top of the support frame 603 is fixedly connected to a second guide sleeve 6044. The upper end of the second guide rod 6043 slidably penetrates through the second guide sleeve 6044.

[0086] By adopting the above technical solution, when it is necessary to draw the lithium battery separator 7 onto the winding roller 804, first control the telescopic rod of the second electric push rod 6041 to extend, so that the pneumatic finger 605 and the notch 5051 are at the same height. Control the second linear module 601 to drive the support frame 603 to move towards the cutting seat 505, so that the pneumatic finger 605 moves into the notch 5051. At this time, the lithium battery separator 7 is located inside the fingers of the pneumatic finger 605. Then, clamp the lithium battery separator 7 with the pneumatic finger 605. Then control the second linear module 601 to drive the lithium battery separator 7 to move towards the winding roller 804, and move the lithium battery separator 7 between the pressing 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 pressing plate 8043.

[0087] To facilitate the understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0088] Working principle: When in use, place the winding roller 804 between two rotating sleeves 8053, and then control the piston rod 80521 of the rotating sleeve 8053 to extend, so that the baffle 80522 releases the extrusion on the chuck 8054. At this time, one end of the chuck 8054 is extruded out of the rotating sleeve 8053 by the elastic force of the first spring 8055, so that the chuck 8054 extends into the winding roller 804, and at the same time, the limit block 8041 is clamped into the card slot 80542, thus completing the installation of the winding roller 804. When another winding roller 804 finishes winding, control the telescopic rod of the first electric push rod 503 to extend, so as to press the lithium battery separator 7 on the cutting seat 505. Control the first linear module 506 to drive the laser cutting machine 507 to move, so that the laser cutting machine 507 can linearly cut the lithium battery separator 7. Then control the telescopic rod of the hydraulic cylinder 807 to retract, put down the wound lithium battery separator 7, and at the same time raise a new winding roller 804. At this time, remove the wound winding roller 804 and install a new winding roller 804. At the same time, control the telescopic rod of the second electric push rod 6041 to extend, so that the pneumatic finger 605 is at the same height as the notch 5051. Control the second linear module 601 to drive the support frame 603 to move towards the cutting seat 505, so that the pneumatic finger 605 moves into the notch 5051. At this time, the lithium battery separator 7 is located inside the fingers of the pneumatic finger 605. Then clamp the lithium battery separator 7 by the pneumatic finger 605. Then control the second linear module 601 to drive the lithium battery separator 7 to move towards the winding roller 804, and move the lithium battery separator 7 between the pressing plate 8043 and the outer wall of the winding roller 804. Then control the piston rod 80521 of the third electric push rod 8052 to continue to extend. Because the end of the piston rod 80521 is tapered, the piston rod 80521 can continuously extrude the inner side surface of the swing plate 8044, so that the lower end of the swing plate 8044 moves towards the inner wall of the winding roller 804, and then the pressing plate 8043 rotates towards the surface of the winding roller 804, thus pressing the lithium battery separator 7 tightly on the winding roller 804. Then control the driving motor 8057 to start, so as to drive the winding roller 804 to rotate, so that the lithium battery separator 7 can be quickly wound around the winding roller 804. When it is wound for seven to eight circles, control the piston rod 80521 of the third electric push rod 8052 to retract a certain distance, so that the piston rod 80521 no longer contacts the swing plate 8044, so as to reduce the wear of the piston rod 80521. At the same time, the chuck 8054 is still stuck in the winding roller 804.

[0089] Parts not involved in the present invention are the same as or can be implemented by using the prior art. Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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), the tape casting machine (2) being used to perform a stretching treatment on an extruded lithium battery separator (7) to form a microporous structure; An extraction device (3), the extraction device (3) being used to perform an extraction process on the stretched lithium battery separator (7) to remove residual solvents and additives; A dryer (4), the dryer (4) being 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 to split the lithium battery separator (7); A traction mechanism (6), the traction mechanism (6) being used to pull the lithium battery separator (7) onto the winding mechanism (8); The winding mechanism (8) comprises: Swinging rack; A winding roller (804), both ends of the winding roller (804) are open, a clamping member for fixing the lithium battery separator (7) on the winding roller (804) is provided on the winding roller (804), and the inner walls at both ends of the winding roller (804) are fixedly connected to limit blocks (8041), and two winding rollers (804) are provided, and the two winding rollers (804) are respectively arranged at both ends of the swing frame; a disassembly and assembly mechanism (805), the disassembly and assembly mechanism (805) being used to mount the winding roller (804) on the swing frame, the disassembly and assembly mechanism (805) being provided in two groups, and the two groups of the disassembly and assembly mechanism (805) being respectively provided at two ends of the swing frame; a squeezing mechanism (806), the squeezing mechanism (806) being arranged on the swing frame, the squeezing mechanism being 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); 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 hingedly connected to a hydraulic cylinder (807), and the end of the telescopic rod of the hydraulic cylinder (807) is hingedly connected to one side of the connecting shaft (803); 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) via 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) on the inner wall of the rotating sleeve (8053); the outer wall of the clamping head (8054) is fixedly connected to the limit slide block (80541); 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); the piston rod (8052) of the third electric push rod (8052) is 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 to 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).

2. A lithium battery separator production line according to claim 1, characterized in that: The clamping member comprises a pressing plate (8043), the pressing plate (8043) being arranged in an arc shape, the pressing plate (8043) being able to fit on the outer wall of the winding roller (804), the winding roller (804) being provided with a strip hole (8042) which is connected to the interior of the winding roller (804), the interior of the winding roller (804) being provided with a swinging plate (8044), the upper end of the swinging plate (8044) passing through the strip hole (8042) and being fixedly connected to one end of the pressing plate (8043), the swinging plate (8044) being rotatably connected in the strip hole (8042), the swinging plate (8044) being movable The end of the plug rod (80521) is arranged 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).

3. A lithium battery separator production line according to claim 2, characterized in that: A driving motor (8057) is fixedly mounted on the bottom of one of the mounting plates (8051) on the assembly and disassembly 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).

4. A lithium battery separator production line according to claim 3, 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 mounted 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 mounted on one side of the first movable seat (504), a laser cutting machine (507) is fixedly mounted on the slide table of the first linear module (506), a cutting seat (505) is fixedly mounted between the two vertical plates (501), and the cutting seat (505) is located on the first linear module (506). 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 telescopic rod of the first electric push rod (503) is controlled to extend, so that the lithium battery diaphragm (7) can be pressed onto 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 notches (5051) are provided at both ends of the cutting seat (505).

5. A lithium battery separator production line according to claim 4, characterized in that: A guide roller (508) is rotatably connected between the two vertical plates (501).

6. A lithium battery separator production line according to claim 5, 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 to a second guide rod (6043), the top of the support frame (603) is fixedly connected to a second guide sleeve (6044), and the upper end of the second guide rod (6043) slides through the second guide sleeve (6044) and is arranged.

7. A lithium battery separator production line according to claim 6, 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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