Stretching forming device for lithium battery diaphragm production

Abstract

The invention discloses a stretch forming device for lithium battery diaphragm production, and relates to the technical field of diaphragm production, the stretch forming device comprises a diaphragm forming machine, the winding end of the diaphragm forming machine is provided with a winding module, and the winding module is used for winding a diaphragm body subjected to stretch forming onto a roller; the winding module comprises two groups of limiting separation blades which are symmetrically arranged at the winding end in parallel; clamping modules are arranged on the sides, close to each other, of the two limiting blocking pieces correspondingly and used for positioning and fixing the roller. The rotating module and the adjusting module are arranged at the winding end; the rotating module is used for driving the fixed roller to rotate; the adjusting module is used for driving the limiting blocking pieces on the two sides to be close to each other or away from each other. After winding is completed, the limiting separation blade does not need to be detached, the detaching efficiency is higher, in the rotating process, the clamping module and the roller are clamped and fixed, the phenomenon of relative sliding of the roller is avoided, and the rotating stability is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of diaphragm production, and in particular to a stretching and forming device for producing lithium battery diaphragms. Background Art

[0002] Lithium battery separator is one of the important components of lithium battery. The performance of separator determines the interface structure and internal resistance of battery, and directly affects the capacity, cycle and safety performance of battery. The separator with excellent performance plays an important role in improving the comprehensive performance of battery. The main function of separator is to separate the positive and negative electrodes of battery and prevent the two electrodes from contacting and short circuiting. In addition, it also has the function of allowing electrolyte ions to pass through. The separator material is non-conductive, and its physical and chemical properties have a great influence on the performance of battery.

[0003] Lithium battery diaphragms are generally divided into dry drawing and wet drawing during stretching and forming production. In actual production, a roller is installed at the end of the diaphragm forming machine to wind up the diaphragm after stretching and forming, which is convenient for subsequent transportation and sales. However, it is now basically rolled up by a fixed roller. The end of the diaphragm is cut off manually with a tool, and then the roller is removed for mold reversal. The rolled diaphragm is taken off onto a paper cylinder, and then the roller is installed on the diaphragm forming machine for the next winding. In this process, the diaphragm needs to be molded again after winding, which is more troublesome.

[0004] In the prior art, for example, the patent document with the publication number CN113968018B discloses a stretching and forming device for producing lithium battery separators, and also discloses a mounting sleeve for fixing a paper roll. After the winding is completed, the mounting sleeve is removed, and then the thread of the limit stopper on one side of the mounting sleeve is unscrewed, and then the paper roll is removed from the outer surface of the mounting sleeve; However, in actual application, after the paper roll is mounted on the mounting sleeve, as the motor drives the mounting sleeve to rotate, relative rotation will occur between the paper roll and the mounting sleeve, thereby affecting the winding of the diaphragm. The paper roll cannot maintain stable and synchronous rotation with the mounting sleeve. Secondly, during the installation or disassembly of the paper roll, the limit baffles at both ends of the mounting sleeve need to be removed. This process is relatively cumbersome and is not suitable for mass stretching production of diaphragms. Summary of the invention

[0005] The purpose of the present invention is to provide a stretching forming device for producing lithium battery separators to solve the following technical problems: 1) There will be relative rotation between the paper roll and the mounting sleeve; 2) The paper roll disassembly and assembly process is cumbersome.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A stretching and forming device for producing lithium battery diaphragms, comprising a diaphragm forming machine, wherein a winding module is provided at a winding end of the diaphragm forming machine, and the winding module is used to wind the stretched diaphragm body onto a roller; the winding module comprises two groups of limit baffles which are arranged in parallel and symmetrically at the winding end; a clamping module is provided on the side where the two groups of limit baffles are close to each other, and the clamping module is used to position and fix the roller; It also includes a rotating module and an adjusting module arranged at the winding end; the rotating module is used to drive the fixed roller to rotate; the adjusting module is used to drive the limit baffles on both sides to move closer to each other or away from each other.

[0007] Preferably, a circular groove is formed at the central end of the limit blocking pieces on both sides, and the clamping module includes a plurality of groups of clamping seats arranged in a circumferential array on one side of the circular groove; Among them, a driving cavity is opened in the described card seat, and each group of card seats is opened with a slide groove connected with the driving cavity in the direction away from the axial end of the limit baffle, a positioning seat is slidably arranged in the slide groove, a driving plate fixed with the positioning seat is slidably arranged in the driving cavity, and the driving cavity is connected with the gas transmission mechanism arranged on the other side of the limit baffle.

[0008] Preferably, the gas delivery mechanism comprises a gas delivery cylinder arranged on the other side of the limit baffle, the gas delivery cylinder is fixed to the limit baffle by an L-shaped bracket, a first piston is slidably arranged in the gas delivery cylinder, the first piston and the cylinder wall are enclosed to form a gas delivery cavity, the first piston is fixed to the driving cylinder, the driving cylinder is connected to a pushing part that drives it to slide along the axial end of the gas delivery cylinder, the axial end of the first piston is provided with an air groove connected to the driving cylinder, and the side wall of the gas delivery cylinder is provided with a guide groove for slidingly embedding the driving cylinder; Wherein, each of the driving chambers is connected to an end of the driving cylinder away from the first piston through an air pipe.

[0009] Preferably, the pushing portion comprises an annular groove formed on the limit stopper, the annular groove being formed on a side close to the card seat, a plurality of groups of driving rods being slidably arranged in a circumferential array on the groove wall of the annular groove, and one end of each driving rod close to the card seat is fixed to the driving ring; A driving disc is fixedly arranged on the driving cylinder, and a plurality of groups of limit plates fixed to the driving rod are fixedly arranged on the driving disc in a circumferential array, and a first spring is arranged on the driving rod.

[0010] Preferably, the adjustment module comprises a support plate arranged at the winding end, a screw is rotatably arranged at the bottom of the support plate, one end of the screw is fixed to the output end of the first motor, and nuts are spirally sleeved on both sides of the screw; Wherein, an adjustment plate is fixedly arranged at the bottom of the nut.

[0011] Preferably, the rotating module comprises a rotating shaft rotatably arranged on the support plate, the end of the rotating shaft is fixed to the output end of the second motor, baffles are arranged on both sides of the support plate, and both ends of the rotating shaft are rotatably connected to the baffles; Among them, the rotating module also includes a support shaft fixedly connected to the air cylinder, the support shaft is rotatably connected to the adjustment plate, the first rotating wheel is fixedly arranged on the side of the rotating shaft close to the baffle, and the second rotating wheel is correspondingly rotatably arranged on the bottom side of the baffle, belts are sleeved on the first rotating wheel and the second rotating wheel, a through groove is provided at the axial end of the second rotating wheel for embedding the support shaft, and a plurality of groups of first clamping grooves are provided on the groove wall of the through groove in a circumferential array, a plurality of groups of first clamping plates that slide and engage with the first clamping grooves one by one are correspondingly fixedly arranged on the support shaft, and a reserved groove for passing the support shaft is provided at the bottom of the baffle.

[0012] Preferably, a plurality of groups of second clamping plates are fixedly arranged in a circumferential array on the outer cylinder wall of the driving cylinder, and a plurality of groups of second clamping grooves correspondingly and slidably engaged with the second clamping plates are correspondingly provided on the groove wall of the guide groove.

[0013] Preferably, the diaphragm forming machine has a guide plate fixedly arranged at an angle on one side close to the winding end, and the diaphragm body is wound onto the roller along the guide plate; Wherein, a pressing plate is arranged correspondingly on the guide plate, and the pressing plate is connected to a lifting part that drives the pressing plate to rise and fall.

[0014] Preferably, the lifting part comprises a mounting frame fixedly arranged on the diaphragm forming machine, two groups of first cylinders are symmetrically fixedly arranged on the mounting frame, the second piston is slidably arranged in the first cylinder, a support rod is fixedly arranged on the pressure plate, and the second piston is fixed to the support rod through a lifting rod; Among them, two groups of second cylinders are fixedly arranged on one side of the support plate, the second cylinder is connected with the first cylinder through an exhaust pipe, a third piston is slidably arranged in the second cylinder, the bottom of the third piston is fixed to a push rod, the push rod slides through the second cylinder and is fixed to a limit frame, a limit roller is rotatably arranged at the bottom of the limit frame, and a second spring is provided on the push rod.

[0015] Beneficial effects of the present invention: (1) After the winding is completed, the present invention does not need to remove the limit baffle, which has higher disassembly efficiency. In addition, during the rotation process, the clamping module is clamped and fixed to the roller to avoid relative sliding of the roller, which has higher rotation stability and further improves the winding stability. (2) In the present invention, when the adjustment module drives the limit baffles on both sides to approach each other, the driving ring first contacts the end of the roller. As the limit baffles continue to move, the driving ring can be compressed into the annular groove. During the movement, the driving ring can drive the limit plate to move through the driving rod. The limit plate synchronously drives the driving cylinder to move through the driving disk, thereby achieving the effect of fixing the roller. The present invention does not require the use of other servo drive equipment to position the roller. The clamping module can be fixed while being embedded in the roller, and the stability is higher. When disassembling, it is only necessary to adjust the limit baffles on both sides to move away from each other. (3) During the normal winding process of the diaphragm body of the present invention, the pressure plate and the guide plate are in a separated state. When the winding is completed, the pressure plate is driven downward by the lifting part to press the diaphragm body against the guide plate, thereby preventing the end of the diaphragm from falling into the inside of the molding machine after cutting, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of a stretching and forming device for producing lithium battery separators according to the present invention; Figure 2 This is a schematic diagram of the structure of the roller installation in a stretching and forming device for producing a lithium battery separator according to the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the roller installation in a stretching and forming device for producing a lithium battery separator according to the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the structure of a clamping module in a stretching and forming device for producing a lithium battery diaphragm according to the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the structure of a clamping module in a stretching and forming device for producing a lithium battery diaphragm according to the present invention. Figure 2 ; Figure 6 It is a structural schematic diagram of a cylinder in a stretching and forming device for producing lithium battery diaphragms of the present invention; Figure 7 It is a structural schematic diagram of a card seat in a stretching and forming device for producing lithium battery diaphragms of the present invention; Figure 8 It is a structural schematic diagram of a support shaft in a stretching and forming device for producing lithium battery separators of the present invention; Fig. 9 It is a structural schematic diagram of a circular groove in a stretching and forming device for producing a lithium battery separator according to the present invention.

[0018] In the figure: 1, diaphragm forming machine; 2, winding module; 3, baffle; 4, limiting roller; 5, second cylinder; 6, air delivery cylinder; 7, support shaft; 8, first arc guide plate; 101, connecting rod; 102, diaphragm body; 103, traction roller; 104, mounting frame; 201, roller; 202, limiting baffle; 203, annular groove; 204, driving ring; 301, first motor; 302, rotating shaft; 3 03, support plate; 304, second motor; 305, belt; 306, screw; 307, nut; 308, adjustment plate; 401, limit frame; 402, first convex plate; 403, first electrode sheet; 404, magnetic sheet; 405, second convex plate; 406, electromagnet; 407, second electrode sheet; 501, push rod; 502, second spring; 503, exhaust pipe; 504, first cylinder; 5 05, lifting rod; 506, L-shaped bracket; 507, third piston; 508, second piston; 509, guide plate; 510, pressure plate; 511, support rod; 601, driving cylinder; 602, driving plate; 603, limit plate; 604, driving rod; 605, first spring; 606, air pipe; 607, card seat; 608, positioning seat; 609, driving chamber; 610, second card plate; 6 11. first piston; 612. air groove; 613. air delivery cavity; 614. guide groove; 615. second clamping groove; 616. circular groove; 617. slide groove; 618. drive plate; 701. first clamping plate; 702. second rotating wheel; 703. through groove; 704. first clamping groove; 705. reserved groove; 706. first rotating wheel; 801. second arc guide plate; 802. mounting rod; 803. base frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1 See also Figure 1 As shown, the present invention is a stretching and forming device for producing lithium battery diaphragms, including a diaphragm forming machine 1; specifically, the diaphragm forming machine 1 includes a plurality of groups of rotating traction rollers 103, two groups of adjacent traction rollers 103 are arranged in parallel and staggered, and the diaphragm body 102 is transmitted from the feed end through each traction roller 103 in sequence to the winding end.

[0021] See also Figure 2The winding end of the diaphragm forming machine 1 is provided with a winding module 2, and the winding module 2 is used to roll the stretched diaphragm body 102 onto the roller 201; specifically, the roller 201 of this embodiment can be made of paper material, rubber material or PC material, which is not limited.

[0022] See also Figure 2-Figure 3 The winding module 2 includes two sets of limit baffles 202 which are arranged in parallel and symmetrically at the winding end; specifically, the two sets of limit baffles 202 are arranged in a circular structure.

[0023] See also Figure 4-Figure 5 A clamping module is provided on the side where the two sets of limit baffles 202 are close to each other, and the clamping module is used to position and fix the roller 201.

[0024] It also includes a rotating module and an adjusting module arranged at the winding end; The rotating module is used to drive the fixed roller 201 to rotate; The adjusting module is used to drive the limiting baffles 202 on both sides to move toward or away from each other; it can be explained that, in this embodiment, the limiting baffles 202 on both sides are first driven to move away from each other for a certain distance by adjusting the module, so that the roller 201 can be moved between the two sets of clamping modules, and then the limiting baffles 202 on both sides are driven to move toward each other by adjusting the module, and the clamping modules on both sides are embedded in the roller 201, and the roller 201 is clamped and fixed by the clamping modules, and then the formed diaphragm body 102 is wound on the roller 201, and the roller 201 is driven by the rotating module. Rotate to realize the winding processing of the diaphragm body 102. After the winding is completed, the diaphragm body 102 is cut by the blade, and finally the limiting baffles 202 on both sides are driven away from each other by the adjustment module to separate the clamping module from the roller 201, and disassembly can be realized. In this embodiment, after the winding is completed, there is no need to remove the limiting baffle 202, and the disassembly efficiency is higher. In addition, during the rotation process, the clamping module and the roller 201 are clamped and fixed to avoid relative sliding of the roller 201, and the rotation stability is higher, which further improves the winding stability.

[0025] Example 2 Based on Example 1, please refer to Figure 4-Figure 5 as well as Fig. 9, a circular groove 616 is formed at the center end of the limit baffles 202 on both sides, and the clamping module includes a plurality of groups of clamping seats 607 arranged in a circumferential array on one side of the circular groove 616, wherein a driving cavity 609 is formed in the clamping seats 607, and a sliding groove 617 connected to the driving cavity 609 is formed in the direction away from the axial end of the limit baffle 202 in each group of clamping seats 607, and a positioning seat 608 is slidably arranged in the sliding groove 617, and a driving plate 618 fixed to the positioning seat 608 is slidably arranged in the driving cavity 609, and the driving cavity 609 is provided with a driving plate 618 fixed to the positioning seat 608. 9 is connected to the air delivery mechanism arranged on the other side of the limit baffle 202, and the air delivery mechanism is used to adjust the air pressure in the driving chamber 609; it can be explained that when the clamping module is embedded in the roller 201, air is delivered to the driving chamber 609 through the air delivery mechanism to increase the pressure in the driving chamber 609, and under the action of pressure, the positioning seat 608 is pushed by the driving plate 618 to move in the direction away from the axis until the positioning seat 608 abuts against the inner wall of the roller 201, thereby achieving the fixation of the roller 201.

[0026] It should be noted that, in this embodiment, four groups of the holders 607 are provided, and the specific number is not limited, as long as the fixing effect of the roller 201 is satisfied.

[0027] In this embodiment, please refer to Figure 3-Figure 5 as well as Figure 7 The gas delivery mechanism includes a gas delivery cylinder 6 arranged on the other side of the limit baffle 202, the gas delivery cylinder 6 is fixed to the limit baffle 202 through an L-shaped bracket 506, a first piston 611 is slidably arranged in the gas delivery cylinder 6, the first piston 611 and the cylinder wall are surrounded to form a gas delivery cavity 613, the first piston 611 is fixed to the driving cylinder 601, the driving cylinder 601 is connected to a pushing part that drives it to slide along the axial end of the gas delivery cylinder 6, the axial end of the first piston 611 is provided with an air groove 612 connected to the driving cylinder 601, and the side wall of the gas delivery cylinder 6 is provided with a guide groove 614 for slidingly embedding the driving cylinder 601, The driving cylinder 601 extends through the guide groove 614 to the outside of the gas cylinder 6, wherein each driving chamber 609 is connected to the end of the driving cylinder 601 away from the first piston 611 through the gas pipe 606; it can be explained that when driving each positioning seat 608 to move in a direction away from the axis, the pushing part squeezes the gas chamber 613 through the driving cylinder 601, so that the gas in the gas chamber 613 can enter the driving chamber 609 through the gas groove 612, the driving cylinder 601 and the gas pipe 606, and then pushes the positioning seat 608 to move in a direction away from the axis under the action of pressure.

[0028] For further information, see Figure 4-Figure 5 , Figure 7 as well as Fig. 9The pushing part includes an annular groove 203 formed on the limit stopper 202, the annular groove 203 is formed on the side close to the card seat 607, and a plurality of groups of driving rods 604 are arranged in a circumferential array for sliding on the groove wall of the annular groove 203, and one end of each driving rod 604 close to the card seat 607 is fixed to the driving ring 204, wherein a driving disk 602 is also fixedly arranged on the driving cylinder 601, and a plurality of groups of limit plates 603 fixed to the driving rod 604 are fixedly arranged in a circumferential array on the driving disk 602, and a first spring 605 is provided on the driving rod 604, one end of the first spring 605 is fixed to the limit plate 603, and the other end is fixed to the limit stopper 202; it can be explained that in the initial state, the driving ring 204 and the annular groove 203 are in a state of being separated from each other (see Fig. 9 ), when the adjustment module drives the limiting baffles 202 on both sides to approach each other, the driving ring 204 first abuts against the end of the roller 201, and as the limiting baffles 202 continue to move, the driving ring 204 can be compressed into the annular groove 203, and the driving ring 204 can drive the limiting plate 603 to move through the driving rod 604 during the movement, and the limiting plate 603 synchronously pushes the driving cylinder 601 to move through the driving disk 602, thereby achieving the effect of fixing the roller 201. In this embodiment, there is no need to use other servo drive equipment to position the roller 201. The clamping module can be fixed while being embedded in the roller 201, and the stability is higher. When disassembling, it is only necessary to adjust the limiting baffles 202 on both sides to move away from each other.

[0029] See also Figure 2-Figure 3 The adjustment module includes a support plate 303 arranged at the winding end, and a screw 306 is rotatably arranged at the bottom of the support plate 303. One end of the screw 306 is fixed to the output end of the first motor 301, and the threads on both sides of the screw 306 are rotated in opposite directions. Nuts 307 are spirally sleeved on both sides of the screw 306, wherein an adjustment plate 308 is fixedly arranged at the bottom of the nut 307, and the gas cylinder 6 is rotatably arranged at the bottom of the adjustment plate 308; it can be explained that when the limit baffle 202 is driven to move, the first motor 301 is started to drive the screw 306 to rotate, and the nut 307 can drive the gas cylinder 6 to move through the adjustment plate 308 during the movement of the screw 306, and the gas cylinder 6 drives the limit baffle 202 to move synchronously through the L-shaped bracket 506.

[0030] In this embodiment, the rotating module includes a rotating shaft 302 rotatably arranged on the support plate 303, the end of the rotating shaft 302 is fixed to the output end of the second motor 304, baffles 3 are arranged on both sides of the support plate 303, and the baffles 3 on both sides are arranged in parallel and symmetrically. The baffle 3 is fixed to the diaphragm forming machine 1 through a connecting rod 101, and the two ends of the rotating shaft 302 are rotatably connected to the baffle 3, wherein the rotating module also includes a support shaft 7 fixedly connected to the air delivery cylinder 6, and the support shaft 7 is rotatably connected to the adjustment plate 308. The first rotating wheel 706 is fixedly arranged on one side of the rotating shaft 302 close to the baffle 3, and the second rotating wheel 702 is correspondingly rotatably arranged on the bottom side of the baffle 3. Belts 305 are sleeved on the first rotating wheel 706 and the second rotating wheel 702, and the axial end of the second rotating wheel 702 is provided with a support for embedding The through groove 703 of the shaft 7 has a plurality of first slots 704 arranged in a circumferential array on the slot wall of the through groove 703. The support shaft 7 is correspondingly and fixedly provided with a plurality of first clamping plates 701 corresponding to and slidably engaging with the first slots 704. The bottom of the baffle 3 is provided with a reserved slot 705 for passing the support shaft 7. It can be explained that in this embodiment, when the driving roller 201 rotates, the second motor 304 is started to drive the rotating shaft 302 to rotate. The rotating shaft 302 drives the second rotating wheel 702 to rotate through the first rotating wheel 706 and the belt 305. The second rotating wheel 702 synchronously drives the support shaft 7 to rotate through the first slot 704 and the first clamping plate 701. The support shaft 7 can drive the limit baffle 202 to rotate through the air delivery cylinder 6. The limit baffle 202 synchronously drives the clamping module to rotate. In addition, this embodiment opens a reserved groove 705 coaxial with the support shaft 7 on the baffle 3, so that when the adjustment module drives the limit baffle 202 to move, the support shafts 7 on both sides can move along the through groove 703 and the reserved groove 705, and the first clamping plate 701 and the first clamping groove 704 always remain in a clamped state.

[0031] See also Figure 7 and Figure 8 A plurality of second clamping plates 610 are fixedly arranged in a circumferential array on the outer cylinder wall of the driving cylinder 601, and a plurality of second clamping grooves 615 correspondingly corresponding to and slidably engaging with the second clamping plates 610 are correspondingly provided on the groove wall of the guide groove 614; specifically, when the gas cylinder 6 is driven to rotate, the gas cylinder 6 drives the driving cylinder 601 to rotate through the cooperation between the second clamping grooves 615 and the second clamping plates 610, so as to improve its stability during rotation.

[0032] As a further solution of this embodiment, please refer to Figure 2-Figure 3 as well as Figure 6The guide plate 509 is fixedly arranged at an angle on one side of the diaphragm forming machine 1 close to the winding end, and the diaphragm body 102 is wound onto the roller 201 along the guide plate 509, wherein a pressure plate 510 is correspondingly arranged on the guide plate 509, and the pressure plate 510 is connected to a lifting part that drives it to rise and fall; it can be explained that during the normal winding process of the diaphragm body 102, the pressure plate 510 and the guide plate 509 are in a separated state. When the winding is completed, the pressure plate 510 is driven downward by the lifting part to press the diaphragm body 102 against the guide plate 509, thereby avoiding the phenomenon that the end of the diaphragm falls into the inside of the forming machine after cutting is completed, and the safety is higher.

[0033] In this embodiment, the lifting part includes a mounting frame 104 fixedly arranged on the diaphragm forming machine 1, and two groups of first cylinders 504 are symmetrically fixedly arranged on the mounting frame 104, and a second piston 508 is slidably arranged in the first cylinder 504. A support rod 511 is fixedly arranged on the pressure plate 510, and the second piston 508 is fixed to the support rod 511 through a lifting rod 505, wherein two groups of second cylinders 5 are correspondingly fixedly arranged on one side of the support plate 303, and the second cylinder 5 is connected with the first cylinder 504 through the exhaust pipe 503. A third piston 507 is slidably arranged in the second cylinder 5, and the bottom of the third piston 507 is fixed to the push rod 501, and the push rod 501 slides through the second cylinder 5 and is fixed to the limiting frame 401. A limiting roller 4 is rotatably arranged at the bottom of the limiting frame 401, and a second spring 502 is provided on the push rod 501; specifically, one end of the second spring 502 is fixed to the limiting frame 401, and the other end is fixed to the cylinder wall of the second cylinder 5; it can be explained that in the initial state In the state, the limiting roller 4 is pressed against the wall of the drum 201. As the diaphragm body 102 is wound on the drum 201, the diameter of the diaphragm body 102 wound on the drum 201 gradually increases, and then the limiting frame 401 can be pushed up by the limiting roller 4. The limiting frame 401 pushes the third piston 507 to rise in the second cylinder 5 through the push rod 501, and then the gas in the second cylinder 5 is discharged to the second cylinder 5 through the exhaust pipe 503. As the air pressure in the second cylinder 5 increases, the second piston 508 pushes the pressing plate 510 down through the lifting rod 505. When the thickness of the diaphragm body 102 wound on the drum 201 reaches a preset value, the pressing plate 510 just presses the diaphragm body 102 against the guide plate 509. On the one hand, it can prevent the diaphragm body 102 wound on the drum 201 from exceeding the preset value. On the other hand, it can press and fix the end of the diaphragm to prevent the end of the diaphragm from falling into the diaphragm forming machine 1 after the subsequent slitting is completed.

[0034] For further information, see Figure 2-Figure 3, two groups of first convex plates 402 are fixedly arranged on one side of the limit frame 401, and first electrode sheets 403 are fixedly arranged on the side of the first convex plates 402 on both sides away from the limit frame 401, and two groups of second convex plates 405 are correspondingly fixedly arranged on one side of the support plate 303, and second electrode sheets 407 corresponding to the first electrode sheets 403 are correspondingly fixedly arranged on the bottom of the second convex plates 405 on both sides. The first electrode sheets 403 and the second electrode sheets 407 are electrically connected to the controller, and the controller is electrically connected to the second motor 304, wherein a magnetic sheet 404 is fixedly arranged on the side of the first convex plate 402 close to the limit frame 401, and an electromagnet 406 is correspondingly fixedly arranged on the second convex plate 405; it can be explained that as the limit frame 401 rises to the limit position, the first electrode sheet 403 contacts the second electrode sheet 407 and generates an electrical signal, which is sent to the controller. The controller drives the second motor 304 to stop moving, thereby preventing the roller 201 from continuing to reel. At the same time, the controller sends a power-on signal to the electromagnet 406 so that the electromagnet 406 can be adsorbed and fixed to the magnetic sheet 404. When the group of rollers 201 is disassembled, based on the adsorption effect of the electromagnet 406, the limit frame 401 will not reset, thereby preventing the pressure plate 510 from separating from the guide plate 509. Accordingly, when the next group of rollers 201 is installed, a power-off signal is sent to the electromagnet 406 through the controller, and the limit frame 401 can be reset under the elastic force of the second spring 502 to reel again, thereby achieving the effect of batch reeling.

[0035] In addition, discharge mechanisms are arranged on both sides of the bottom of the winding end, and each set of discharge mechanisms includes a first arc guide plate 8 and a second arc guide plate 801. The first arc guide plate 8 and the second arc guide plate 801 are respectively fixed to the base frame 803 through the mounting rod 802; specifically, when a group of rollers 201 is wound, as the rollers 201 are separated from the clamping module, the rollers 201 can be discharged to the next processing step along the arc groove formed by the first arc guide plate 8 and the second arc guide plate 801, thereby realizing the effect of automatic unloading.

[0036] A forming method of a stretching forming device for producing a lithium battery separator, comprising the following steps: Step 1: Please refer to Figure 1-Figure 3 , the adjusting module drives the limit baffles 202 on both sides to move away from each other for a certain distance, and moves the roller 201 between the two sets of clamping modules; Step 2: The adjustment module drives the limit baffles 202 on both sides to move toward each other, and the clamping modules on both sides are embedded into the roller 201; Step 3, clamping the clamping module and the roller 201 to fix; Step 4: Winding the formed diaphragm body 102 on the roller 201; Step 5: The rotating module drives the roller 201 to rotate to achieve the winding process of the diaphragm body 102; Step 6: After the winding is completed, the diaphragm body 102 is cut by a blade; Step 7: The adjusting module drives the limiting baffles 202 on both sides to move away from each other, so that the clamping module is separated from the roller 201 to achieve disassembly.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A stretching and forming device for producing lithium battery diaphragms, comprising a diaphragm forming machine (1), characterized in that: The reeling end of the diaphragm forming machine (1) is provided with a reeling module (2), and the reeling module (2) is used to reel the stretched diaphragm body (102) onto the roller (201); the reeling module (2) comprises two groups of limit baffles (202) which are arranged in parallel and symmetrically at the reeling end; a clamping module is provided on the side where the two groups of limit baffles (202) are close to each other, and the clamping module is used to position and fix the roller (201); It also includes a rotating module and an adjusting module arranged at the winding end; The rotating module is used to drive the fixed roller (201) to rotate; The adjustment module is used to drive the limiting baffles (202) on both sides to move towards each other or away from each other.

2. A stretching and forming device for producing lithium battery separators according to claim 1, characterized in that: A circular groove (616) is formed at the central end of the limit blocking pieces (202) on both sides, and the clamping module comprises a plurality of clamping seats (607) arranged in a circumferential array on one side of the circular groove (616); A driving cavity (609) is provided in the card seat (607), and a slide groove (617) communicating with the driving cavity (609) is provided in a direction away from the axial end of the limit baffle (202) in each group of card seats (607), a positioning seat (608) is slidably arranged in the slide groove (617), a driving plate (618) fixed to the positioning seat (608) is slidably arranged in the driving cavity (609), and the driving cavity (609) is connected to a gas transmission mechanism arranged on the other side of the limit baffle (202).

3. A stretching and forming device for producing lithium battery separators according to claim 2, characterized in that: The gas delivery mechanism comprises a gas delivery cylinder (6) arranged on the other side of the limit baffle (202), the gas delivery cylinder (6) being fixed to the limit baffle (202) via an L-shaped bracket (506), a first piston (611) being slidably arranged in the gas delivery cylinder (6), the first piston (611) and the cylinder wall being enclosed to form a gas delivery cavity (613), the first piston (611) being fixed to a driving cylinder (601), the driving cylinder (601) being connected to a pushing portion driving it to slide along the axial end of the gas delivery cylinder (6), the axial end of the first piston (611) being provided with an air groove (612) communicating with the driving cylinder (601), and a guide groove (614) for slidably embedding the driving cylinder (601) being provided on the side wall of the gas delivery cylinder (6); Each of the driving chambers (609) is connected to an end of the driving cylinder (601) away from the first piston (611) via an air delivery pipe (606).

4. A stretching and forming device for producing lithium battery separators according to claim 3, characterized in that: The pushing portion comprises an annular groove (203) formed on the limit stopper (202), the annular groove (203) being formed on a side close to the clamping seat (607), a plurality of groups of driving rods (604) being slidably arranged in a circumferential array on the groove wall of the annular groove (203), and one end of each driving rod (604) close to the clamping seat (607) being fixed to the driving ring (204); A driving disk (602) is fixedly arranged on the driving cylinder (601), and a plurality of groups of limit plates (603) fixed to the driving rod (604) are fixedly arranged in a circumferential array on the driving disk (602), and a first spring (605) is provided on the driving rod (604).

5. A stretching and forming device for producing lithium battery separators according to claim 1, characterized in that: The adjustment module comprises a support plate (303) arranged at the winding end, a screw rod (306) is rotatably arranged at the bottom of the support plate (303), one end of the screw rod (306) is fixed to the output end of the first motor (301), and nuts (307) are spirally sleeved on both sides of the screw rod (306); Wherein, an adjustment plate (308) is fixedly arranged at the bottom of the nut (307).

6. A stretching and forming device for producing lithium battery separators according to claim 5, characterized in that: The rotating module comprises a rotating shaft (302) rotatably arranged on a support plate (303), an end of the rotating shaft (302) being fixed to an output end of a second motor (304), baffles (3) being arranged on both sides of the support plate (303), and both ends of the rotating shaft (302) being rotatably connected to the baffles (3); The rotating module further comprises a support shaft (7) fixedly connected to the gas delivery cylinder (6), the support shaft (7) being rotatably connected to the adjustment plate (308), a first rotating wheel (706) being fixedly arranged on the side of the rotating shaft (302) close to the baffle plate (3), a second rotating wheel (702) being rotatably arranged on the bottom side of the baffle plate (3), a belt (305) being sleeved on the first rotating wheel (706) and the second rotating wheel (702), a through groove (703) for embedding the support shaft (7) being provided at the axial end of the second rotating wheel (702), a plurality of groups of first clamping grooves (704) being provided in a circumferential array on the groove wall of the through groove (703), a plurality of groups of first clamping plates (701) being slidably engaged with the first clamping grooves (704) correspondingly and fixedly arranged on the support shaft (7), and a reserved groove (705) for passing the support shaft (7) being provided at the bottom of the baffle plate (3).

7. A stretching and forming device for producing lithium battery separators according to claim 3, characterized in that: A plurality of groups of second clamping plates (610) are fixedly arranged in a circumferential array on the outer cylinder wall of the driving cylinder (601), and a plurality of groups of second clamping grooves (615) correspondingly slidably engaged with the second clamping plates (610) are correspondingly provided on the groove wall of the guide groove (614).

8. A stretching and forming device for producing lithium battery separators according to claim 5, characterized in that: The diaphragm forming machine (1) has a guide plate (509) arranged in an inclined manner on one side close to the winding end, and the diaphragm body (102) is wound onto the roller (201) along the guide plate (509); Wherein, a pressing plate (510) is arranged correspondingly on the guide plate (509), and the pressing plate (510) is connected to a lifting part that drives the pressing plate (510) to rise and fall.

9. A stretching and forming device for producing lithium battery separators according to claim 8, characterized in that: The lifting part comprises a mounting frame (104) fixedly arranged on the diaphragm forming machine (1), two groups of first cylinders (504) are symmetrically fixedly arranged on the mounting frame (104), a second piston (508) is slidably arranged in the first cylinder (504), a support rod (511) is fixedly arranged on the pressure plate (510), and the second piston (508) is fixed to the support rod (511) via a lifting rod (505).

10. A stretching and forming device for producing lithium battery separators according to claim 9, characterized in that: Two groups of second cylinders (5) are fixedly arranged on one side of the support plate (303); the second cylinders (5) are connected to the first cylinder (504) through the exhaust pipe (503); a third piston (507) is slidably arranged in the second cylinder (5); the bottom of the third piston (507) is fixed to the push rod (501); the push rod (501) slides through the second cylinder (5) and is fixed to the limit frame (401); a limit roller (4) is rotatably arranged at the bottom of the limit frame (401); and a second spring (502) is provided on the push rod (501).

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