Heat setting post cutting equipment for lithium battery separator production

Abstract

The present application relates to cutting equipment technical field, more specifically, it relates to a kind of hot setting cutting equipment for lithium battery separator production, rack is installed in lithium battery separator production line, it includes: including the edge clamping wheel mechanism, cutter mechanism and single-arm press roller mechanism that are sequentially arranged along the direction of lithium battery separator travel;Edge clamping wheel mechanism is used to clamp and flatten the side edge of lithium battery separator to be cut before cutting lithium battery separator;Cutter mechanism includes: cutter assembly and the top flat component matched with cutter assembly;Top flat component is used to push away the corrugation of both sides of cutting edge to the outside after cutter assembly cuts into lithium battery separator, to flatten the lithium battery separator at incision;The present application is clamped and flattened to the side edge of lithium battery separator before cutting by edge clamping wheel mechanism, so that separator is in relatively flat state when entering cutting link, avoid the problem that wave pattern wrinkle is easily formed when cutting knife is pressed in traditional cutting mode because separator is in free state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting equipment, more particularly to a heat setting post-cutting equipment for lithium battery separator production. BACKGROUND

[0002] The lithium battery separator is one of the key inner components of the lithium ion battery, and its performance directly affects the capacity, cycle life and safety performance of the battery. In the production process of the separator, after stretching, heat setting and other processes, the left and right sides of the film material need to be slitting to remove the waste edges that do not meet the width standard, so as to obtain the finished product with consistent width.

[0003] At present, the cutting method commonly used in the industry is to set a disc cutter or a straight blade cutter on the production line to perform online slitting on the continuously advancing separator. However, due to the extremely thin and soft material of the lithium battery separator and its significant ductility, the traditional cutting equipment has the following problems during cutting: the cutter directly acts on the separator in a free state, and when the cutter is pressed to cut, the separator in front of the cutter will accumulate and wrinkle due to pressure, forming so-called wavy wrinkles near the cutter. The wrinkled waste edges are prone to drifting, breaking or winding around the roller during transmission, resulting in frequent shutdown of the production line and affecting the production efficiency; and the effective film surface after slitting may be pulled, causing deformation or wrinkles on the edge or even the inside of the product, affecting the yield of the product. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a heat setting post-cutting equipment for lithium battery separator production.

[0005] The technical solution adopted by the present application is:

[0006] The heat setting post-cutting equipment for lithium battery separator production is installed on the rack of the lithium battery separator production line, and comprises: a clamping edge wheel mechanism, a cutter mechanism and a single-arm pressure roller mechanism arranged in sequence along the direction of the lithium battery separator; the clamping edge wheel mechanism is used to clamp and flatten the side edges of the lithium battery separator to be cut before cutting the lithium battery separator; the cutter mechanism comprises: a cutter assembly and a top flattening assembly cooperating with the cutter assembly; the cutter assembly is used to cut the side edges of the lithium battery separator flattened by the clamping edge wheel mechanism; the top flattening assembly is used to push the wrinkles on both sides of the cutter away from the outside after the cutter assembly cuts into the lithium battery separator, so as to flatten the lithium battery separator at the cutting position; the single-arm pressure roller mechanism is used to isolate the film surface tension of the lithium battery separator and flatten the film surface and the waste edge of the lithium battery separator after the cutter assembly cuts the lithium battery separator.

[0007] Further, the combination of the clamping edge wheel mechanism, the cutter mechanism and the single-arm pressure roller mechanism is provided with two groups, and the two groups are symmetrically arranged on both sides of the lithium battery separator running path to perform synchronous cutting and edging processing on both sides of the lithium battery separator.

[0008] Further, the single-arm pressure roller mechanism comprises: a fixed roller frame mounted on the rack, one end of the fixed roller frame being rotationally connected with the movable roller frame, and the other end of the movable roller frame being rotationally connected with the rubber roller capable of elastically pressing the lower surface of the lithium battery separator; the fixed end of the pressure roller cylinder is rotationally connected with the fixed roller frame, and the movable end of the pressure roller cylinder is rotationally connected with the movable roller frame, so as to control the movable roller frame to flip relative to the fixed roller frame, and make the rubber roller press on or separate from the lower surface of the lithium battery separator.

[0009] Further, the roller surface of the rubber roller is wound with a low-hardness flexible material layer, so as to smooth the cut film surface and the scrap edge by pressing the lower surface of the lithium battery separator with the low-hardness flexible material layer.

[0010] Further, the low-hardness flexible material layer is EVA foam, and the EVA foam is arranged corresponding to the cutting position of the cutter mechanism; the width of the EVA foam covers 1 / 2 of the scrap edge area cut by the cutter mechanism, and the EVA foam is only in contact with the scrap edge area.

[0011] Further, the EVA foam is black EVA foam with uneven surface.

[0012] Further, the edge clamping wheel mechanism is driven by the air pressure driving mechanism connected therewith, and the air source passage of the air pressure driving mechanism is provided with a pressure regulating valve mechanism; the pressure regulating valve mechanism is configured to control the air pressure for driving the edge clamping wheel mechanism to be between 0.05 MPa and 0.15 MPa, so as to provide constant clamping force to the side edge of the lithium battery separator; and the clamping amount of the edge clamping wheel mechanism for clamping the side edge of the lithium battery separator is 1 / 2 of the required scrap edge cutting width.

[0013] Further, the cutter assembly comprises: a blade connected to an elongated cutter frame, the elongated cutter frame being connected to a sliding base, the sliding base being slidingly connected to a pneumatic sliding table, the pneumatic sliding table and the sliding base being respectively connected to the fixed end and the movable end of a cutter pushing cylinder; the pneumatic sliding table is fixedly connected to a sliding block connecting seat, the sliding block connecting seat being slidingly connected to a linear guide rail, the linear guide rail being perpendicularly and staggeredly arranged with the pneumatic sliding table; the linear guide rail is fixedly connected to a cutter base provided with a scale line; the cutter base is connected to the rack; a plurality of limiting locking holes are uniformly arranged on the linear guide rail, and a limiting locking piece is connected to the sliding block connecting seat, and the bottom of the limiting locking piece is inserted into one of the limiting locking holes.

[0014] Further, the top flattening assembly comprises: a top film ring; the top film ring comprises: a semicircular ring body at the front and a horizontal shaft body at the back, and the two ends of the semicircular ring body are connected with the two ends of the horizontal shaft body; the horizontal shaft body is connected to an assembly seat, and the assembly seat is connected to the sliding base; the top film ring is located below the blade, and the arc top of the semicircular ring body is located in front of the blade.

[0015] Further, an acute angle of 55° to 65° is formed between the blade and the film surface of the lithium battery separator.

[0016] Further, the included angle between the blade and the lithium battery separator membrane surface is preferably 60 degrees.

[0017] Further, the rear end of the horizontal shaft body is fixedly connected with an air inlet pipe, the air inlet pipe is communicated with a shunt chamber in the horizontal shaft body, and two ends of the shunt chamber are communicated with two ends of a dispersion chamber in the semicircular ring body; an annular slit air port concentric with the top membrane ring is arranged at the end of the outer ring surface of the semicircular ring body away from the horizontal shaft body, the air outlet direction of the annular slit air port is configured to make the blown gas flow to the outer edge direction of the two sides of the cutout, and the flow passage cross section of the annular slit air port is gradually reduced from the inside to the outside.

[0018] Further, the front end of the horizontal shaft body is fixedly connected with a shunt port communicated with the shunt chamber, a plurality of shunt pipes are fixedly connected with the front end of the shunt port, the semicircular ring body is fixedly connected with the front end of the plurality of shunt pipes, the end of the plurality of shunt pipes inserted into the dispersion chamber is arranged towards the plurality of vertical flow equalizing columns, the plurality of vertical flow equalizing columns are fixedly arranged in the dispersion chamber, and the plurality of shunt pipes are located between the two end portions of the annular slit air port.

[0019] The beneficial effects of the present application are:

[0020] In the heat setting and cutting equipment for lithium battery separator production, the edge clamping wheel mechanism clamps and flattens the side edge of the lithium battery separator before cutting, so that the separator is in a relatively flat state when entering the cutting link, avoiding the problem that in the traditional cutting mode, the separator is in a free state and is easily formed into a wavy wrinkle when the cutter is pressed down. The top flattening assembly in the cutter mechanism can push the corrugations on both sides of the cutter opening outward after the cutter assembly cuts into the lithium battery separator, further flattening the lithium battery separator at the cutting position, which is beneficial to improve the flatness of the cut lithium battery separator, reduce local wrinkles and uneven conditions caused by cutting, and improve the cutting quality. The present application reduces the generation of waste edge wrinkles through the synergistic effect of the edge clamping wheel mechanism and the top flattening assembly, reduces the possibility of waste edge wrinkles pulling the effective membrane surface, and in addition, the single-arm pressure roller mechanism is also provided in the present application, which can isolate the membrane surface tension of the lithium battery separator after the cutter assembly cuts the lithium battery separator, which is beneficial to stabilize the state of the separator, avoid further deformation or wrinkles of the cut separator caused by the membrane surface tension, and the single-arm pressure roller mechanism can also smooth the membrane surface and the waste edge of the lithium battery separator, so that the cut separator and the waste edge are more regular, facilitating subsequent processing and collection.

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are meant to explain the present application but are not intended to limit the application. In the drawings:

[0023] Figure 1 A schematic diagram of the installation of the heat setting and cutting device for lithium battery separator production in a lithium battery separator production line according to the present application Figure One ;

[0024] Figure 2 A schematic diagram of the installation of the heat setting and cutting device for lithium battery separator production in a lithium battery separator production line according to the present application Figure Two ;

[0025] Figure 3 A schematic diagram of the cutting knife mechanism according to the present application Figure One ;

[0026] Figure 4 A schematic diagram of the cutting knife mechanism according to the present application Figure Two ;

[0027] Figure 5 A schematic diagram of the cutting knife assembly according to the present application

[0028] Figure 6 A schematic diagram of the top flat assembly according to the present application Figure One ;

[0029] Figure 7 A schematic diagram of the single arm pressure roller mechanism according to the present application

[0030] Figure 8 A schematic diagram of the top flat assembly according to the present application Figure Two ;

[0031] Figure 9 A schematic diagram of the top flat assembly according to the present application Figure Three ;

[0032] Figure 10 A partial sectional view of the top flat assembly according to the present application Figure One ;

[0033] Figure 11 A partial sectional view of the top flat assembly according to the present application Figure Two .

[0034] Figure: edge clamping wheel mechanism 1; cutter mechanism 2; single-arm pressure roller mechanism 3; fixed roller frame 301; movable roller frame 302; rubber roller 303; pressure roller cylinder 304; low-hardness flexible material layer 305; cutter assembly 4; blade 401; extended blade holder 402; sliding base 403; pneumatic sliding table 404; cutter pushing cylinder 405; sliding block connecting seat 406; linear guide rail 407; cutter base 408; top flattening assembly 5; top film ring 501; assembly seat 502; air inlet pipe 503; flow dividing chamber 504; flow dispersing chamber 505; annular slit air port 506; flow dividing pipe 507; vertical flow equalizing column 508; assembly sliding block 509; angle adjusting screw rod 510; angle adjusting connecting rod 511; hinged cross shaft 512. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0037] Embodiment 1:

[0038] Please refer to Figures 1-7 The present application provides a heat setting and cutting equipment for lithium battery separator production, which is installed on the rack of a lithium battery separator production line and comprises: an edge clamping wheel mechanism 1, a cutter mechanism 2 and a single-arm pressure roller mechanism 3 arranged in sequence along the direction of lithium battery separator travel; the edge clamping wheel mechanism 1 is used to clamp and flatten the side edges of the lithium battery separator to be cut before cutting; the cutter mechanism 2 comprises: a cutter assembly 4 and a top flattening assembly 5 cooperating with the cutter assembly 4; the cutter assembly 4 is used to cut the side edges of the lithium battery separator flattened by the edge clamping wheel mechanism 1; the top flattening assembly 5 is used to push the corrugations on both sides of the cutting edge outward after the cutter assembly 4 cuts into the lithium battery separator, so as to flatten the lithium battery separator at the cutting position; the single-arm pressure roller mechanism 3 is used to isolate the surface tension of the lithium battery separator and flatten the surface of the lithium battery separator after the cutter assembly 4 cuts the lithium battery separator.

[0039] The working principle and technical effects of the above scheme are:

[0040] The edge clamping wheel mechanism 1, the cutter mechanism 2 and the single-arm pressure roller mechanism 3 are sequentially arranged along the advancing direction of the lithium battery separator, the edge clamping wheel mechanism 1 first acts before the cutting of the cutting assembly 4, the edge clamping wheel mechanism 1 clamps the side edges of the lithium battery separator from the side, and the clamping force overcomes the internal stress of the film material caused by heat setting to flatten the wave pattern in advance, so as to ensure that the film surface of the area to be cut is flat, the cutting assembly 4 is responsible for cutting, the cutting assembly 4 cuts the film edges that have been flattened by the edge clamping wheel mechanism 1, the flattening assembly 5 cooperates with the cutting assembly 4, after the cutting assembly 4 cuts into the film, the flattening assembly 5 precisely acts on the cutting area to push away and flatten the newly generated wave pattern on both sides of the cutting edge, so that the stress concentration is eliminated immediately, after cutting is completed, the main body of the lithium battery separator and the waste edge are separated, the single-arm pressure roller mechanism 3 acts in the last stage, the single-arm pressure roller mechanism 3 presses the film surface to isolate the direct influence of the tension behind the production line on the cutting edge area that has just been cut, prevents tearing of the edge due to tension fluctuation, and the single-arm pressure roller mechanism 3 uses flexible contact to flatten the area processed by the cutting mechanism 2 for the last time, so as to ensure that the film surface and the waste edge are completely separated and there is no any warping, and defects of uneven thickness are compensated.

[0041] In the present application, the pre-flattening of the edge clamping wheel mechanism 1 reduces the cutting resistance and unevenness from the source; the immediate pushing action of the flattening assembly 5 directly counteracts and eliminates the cutting stress, the double action ensures that the cutting edge is flat, smooth and free of visible wave pattern, and the tearing phenomenon caused by stress concentration in subsequent use is avoided as much as possible. The tension isolation effect of the single-arm pressure roller mechanism 3 stabilizes the process section after the cutting point, avoids film breakage and material jamming, so that the waste edge is smoothly pulled back for recycling and will not be wound around the equipment guide roller due to warping, thereby improving the continuous operation efficiency and reliability of the production line. The present application has good compensation effect on uneven thickness and uneven internal stress of the film material caused by heat shrinkage, whether it is pre-flattening, immediate shaping or final flattening, it constantly corrects defects, so that the width and quality of the cut product remain highly consistent, and the scrap rate is reduced. In addition, the edge clamping wheel mechanism 1 flattens the film surface, so that the cutting assembly 4 is more evenly stressed and vibrates less during cutting, reducing abnormal wear of the cutting tool and prolonging its service life to some extent.

[0042] The combination of the edge clamping wheel mechanism 1, the cutting mechanism 2 and the single-arm pressure roller mechanism 3 is provided with two groups, and the two groups are symmetrically arranged on both sides of the advancing path of the lithium battery separator to simultaneously cut and trim the two sides of the lithium battery separator. The design of the above structure facilitates simultaneous cutting and trimming of the two sides of the lithium battery separator, eliminates the need for two-time processing of the two sides, greatly improves the cutting and trimming efficiency, makes the entire production process more smooth, and reduces the production time.

[0043] Example 2:

[0044] Please refer to Figures 1-7 The single-arm pressure roller mechanism 3 comprises: a fixed roller frame 301 mounted on the rack, one end of an active roller frame 302 rotatably connected to the fixed roller frame 301, and the other end of the active roller frame 302 rotatably connected to a rubber roller 303 that can be elastically pressed on the lower surface of the lithium battery separator; the fixed end of a pressure roller air cylinder 304 is rotatably connected to the fixed roller frame 301, and the active end of the pressure roller air cylinder 304 is rotatably connected to the active roller frame 302, so as to control the active roller frame 302 to flip relative to the fixed roller frame 301, so that the rubber roller 303 is pressed on the lower surface of the lithium battery separator or separated from the lower surface of the lithium battery separator.

[0045] The working principle and technical effects of the above scheme are:

[0046] The single-arm pressure roller mechanism 3 is mounted on the rack of the lithium battery separator production line, and the fixed roller frame 301 is fixed to the rack to provide a support base. One end of the active roller frame 302 is rotatably connected to the fixed roller frame 301, and the other end is rotatably connected to the rubber roller 303. At this time, the rubber roller 303 is relatively separated from the lower surface of the lithium battery separator or is not under pressure. When the rubber roller 303 needs to be pressed on the lower surface of the lithium battery separator, the pressure roller air cylinder 304 starts to work. The fixed end of the pressure roller air cylinder 304 is rotatably connected to the fixed roller frame 301, and the active end is rotatably connected to the active roller frame 302. The active end of the pressure roller air cylinder 304 extends and pushes the active roller frame 302 to rotate relative to the fixed roller frame 301, so that the active roller frame 302 drives the rubber roller 303 to approach and press on the lower surface of the lithium battery separator. Since the rubber roller 303 is elastic, it can adapt to the surface morphology of the separator during the pressing process, achieving elastic pressing. When the rubber roller 303 does not need to be pressed on the lower surface of the lithium battery separator, the active end of the pressure roller air cylinder 304 is retracted, pulling the active roller frame 302 to rotate in the opposite direction, so that the rubber roller 303 is separated from the lower surface of the lithium battery separator. In the present application, the rotation of the active roller frame 302 is controlled by the extension and retraction of the pressure roller air cylinder 304, realizing the pressing and separation of the rubber roller 303 on the lower surface of the lithium battery separator. During production, the rubber roller 303 can be pressed in time according to actual needs, such as cutting process to isolate the membrane surface tension, smoothing the membrane surface and waste edge, and separated in time when not needed, avoiding unnecessary impact on the separator, improving the flexibility of production operation. The rubber roller 303 is elastically pressed on the lower surface of the lithium battery separator, which can effectively isolate the membrane surface tension of the lithium battery separator and prevent the membrane surface tension from causing deformation or wrinkles of the cut separator. At the same time, the rubber roller 303 can perform smoothing operation on the membrane surface and waste edge of the lithium battery separator during the pressing process, making the cut separator and waste edge more regular, improving the quality of the separator and the yield of production.

[0047] In addition, the pressure of the air cylinder 304 of the pressure roller can be adjusted to control the pressure of the rubber roller 303 on the film surface, so that the pressure is constant and flexible, rather than rigid collision. Even if the film surface has thickness fluctuations or the production line has slight shaking, it can always be in a state of being pressed gently. This fundamentally reduces the risk of pressing and wrinkling the film. In addition, the relative swing design of the fixed roller frame 301 and the movable roller frame 302 makes the rubber roller 303 roll in when pressed, rather than vertically drop down. The action is soft and the impact on the film surface is smaller.

[0048] Embodiment 3:

[0049] Please refer to Figures 1-7 The surface of the rubber roller 303 is wrapped with a low-hardness flexible material layer 305 to smooth the cut film surface and waste edge under the surface of the lithium battery separator by the low-hardness flexible material layer 305. The low-hardness flexible material layer 305 is EVA foam, which is arranged corresponding to the cutting part of the cutting mechanism 2. The width of the EVA foam covers half of the area where the waste edge is cut off by the cutting mechanism 2, and the EVA foam only contacts the waste edge area. The EVA foam is black EVA foam with uneven surface.

[0050] The working principle and technical effects of the above scheme are as follows:

[0051] When the lithium battery separator passes through the single-arm pressure roller mechanism 3 on the production line, the low-hardness flexible material layer 305, i.e. the EVA foam, wound on the rubber roller 303 will be pressed onto the lower surface of the lithium battery separator. Due to the low hardness and flexibility of the EVA foam, it can well adhere to the surface of the separator, and at the same time, the uneven structure of the EVA foam surface forms non-uniform contact with the film surface. During the pressing process, non-uniform contact causes the EVA foam to exert uneven pressure on the film surface and the scrap edge, thereby generating small forces in different directions, which helps to eliminate possible wrinkles and unevenness of the film surface and scrap edge after cutting, gradually unfolding and smoothing out the wrinkles. The uneven surface increases the friction between the EVA foam and the film surface. When the rubber roller 303 rotates with the movement of the separator, the increased friction enables the EVA foam to better drive the film surface and the scrap edge to move together, reducing the relative sliding between the film surface and the scrap edge and the rubber roller 303. During the rotation of the rubber roller 303, the film surface and the scrap edge can be more effectively pulled and smoothed, further improving the smoothing effect. In the present application, the non-uniform contact, increased friction and avoidance of adsorption are achieved through the uneven structure of the EVA foam surface, which can better smooth the film surface and scrap edge after cutting. Compared with ordinary smooth-surface foam, this design can more effectively eliminate wrinkles and unevenness, improve the flatness and quality of the lithium battery separator, and thus improve the yield of battery production; the EVA foam is arranged corresponding to the cutting position of the cutting knife mechanism 2, with a width covering half of the scrap edge area cut by the cutting knife mechanism 2 and only contacting the scrap edge area, avoiding contact between the EVA foam and the effective part of the film surface and the clamping position of the chain gripper, which will not affect the effective part of the separator and the key clamping position in the production process, ensuring the normal production process and product quality. In addition, the use of black EVA foam solves the problem of traditional light-colored foam interfering with optical detection sensors, and the sensor can more accurately identify and track the edge of the transparent separator, reducing frequent shutdowns or quality defects caused by sensor misjudgment, improving production stability and efficiency, and also improving the level of automatic control of the entire production process and the consistency of product quality.

[0052] The clamping wheel mechanism 1 is driven by the pneumatic driving mechanism connected therewith, and a pressure regulating valve mechanism is arranged on the air source passage of the pneumatic driving mechanism; the pressure regulating valve mechanism is configured to control the air pressure for driving the clamping wheel mechanism 1 to be between 0.05 MPa and 0.15 MPa, so as to provide a constant clamping force to the side edge of the lithium battery separator, and preferably the air pressure is 0.1 MPa; the clamping amount of the clamping wheel mechanism 1 clamping the side edge of the lithium battery separator is 1 / 2 of the required waste edge cutting width. In the present application, by arranging the pressure regulating valve mechanism on the air source passage of the pneumatic driving mechanism, the air pressure for driving the clamping wheel mechanism 1 is controlled to be between 0.05 MPa and 0.15 MPa, so as to provide a constant clamping force to the side edge of the lithium battery separator, and ensure that the side edge of the separator is in a stable and flat state before cutting, and avoid wrinkles caused by unstable clamping force. At the same time, the clamping amount of the clamping wheel mechanism 1 clamping the side edge of the lithium battery separator is 1 / 2 of the required waste edge cutting width, which not only ensures the effective clamping of the waste edge area, but also does not affect the effective part of the separator, provides good conditions for the high-quality cutting of the subsequent cutter mechanism, improves the precision and quality of the lithium battery separator cutting, and improves the battery production yield.

[0053] Example 4:

[0054] Please refer to Figures 1-7 The cutter assembly 4 comprises: a blade 401 connected to an elongated cutter holder 402, the elongated cutter holder 402 being connected to a sliding base 403, the sliding base 403 being slidingly connected to a pneumatic sliding table 404, the pneumatic sliding table 404 and the sliding base 403 being connected to the fixed end and the movable end of a cutter pushing cylinder 405 respectively; the pneumatic sliding table 404 is fixedly connected to a sliding block connecting seat 406, the sliding block connecting seat 406 being slidingly connected to a linear guide rail 407, the linear guide rail 407 being arranged perpendicularly and staggeredly with the pneumatic sliding table 404; the linear guide rail 407 is fixedly connected to a cutter base 408 with scale lines; the cutter base 408 is connected to a machine frame; a plurality of limiting locking holes are uniformly arranged on the linear guide rail 407, and a limiting locking piece is connected to the sliding block connecting seat 406, and the bottom of the limiting locking piece is inserted into one of the limiting locking holes.

[0055] The working principle and technical effects of the above scheme are:

[0056] In the application, the cutter base 408 is connected to the rack, the linear guide rail 407 is fixedly connected to the cutter base 408 with scale lines, the sliding block connecting seat 406 is slidingly connected to the linear guide rail 407, and the operator can slide the sliding block connecting seat 406 along the linear guide rail 407 to the appropriate position according to the cutting requirements of the lithium battery separator by observing the scale lines on the cutter base 408, then insert the bottom of the limiting locking piece connected to the sliding block connecting seat 406 into the corresponding limiting locking hole on the linear guide rail 407, realize the position locking of the sliding block connecting seat 406 on the linear guide rail 407, complete the coarse adjustment of the blade 401 in the vertical direction of the pneumatic sliding table 404. The pneumatic sliding table 404 is fixedly connected to the sliding block connecting seat 406, the sliding base 403 is slidingly connected to the pneumatic sliding table 404, the blade 401 is connected to the lengthened cutter holder 402, the lengthened cutter holder 402 is connected to the sliding base 403, the fixed end of the cutter pushing pneumatic cylinder 405 is connected with the pneumatic sliding table 404, and the movable end is connected with the sliding base 403. When cutting is needed, the movable end of the cutter pushing pneumatic cylinder 405 is extended or retracted to push the sliding base 403 to slide on the pneumatic sliding table 404, so as to drive the lengthened cutter holder 402 and the blade 401 to move linearly, and realize the cutting action of the lithium battery separator. At the same time, by controlling the stroke and speed of the cutter pushing pneumatic cylinder 405, the cutting position and cutting force of the blade 401 can be finely adjusted. In the application, by arranging the linear guide rail 407 and the cutter base 408 with scale lines, the coarse positioning of the blade 401 in one direction can be realized, the operator can accurately move the sliding block connecting seat 406 to the required position according to the scale lines, and the position is locked by the limiting locking piece, so that the preliminary accuracy of the cutting position is ensured. The cooperation of the pneumatic sliding table 404 and the cutter pushing pneumatic cylinder 405 can further finely adjust the position of the blade 401 in the other direction, further improve the accuracy of the cutting position, meet the cutting requirements of different lithium battery separators, ensure the accuracy of the cutting position, and improve the cutting quality. The pneumatic sliding table 404 provides a stable sliding track for the sliding base 403, and the cutter pushing pneumatic cylinder 405 can accurately control the movement of the sliding base 403. During the cutting process, the blade 401 can move linearly along the set path, ensuring the stability and consistency of the cutting action. At the same time, the arrangement of the lengthened cutter holder 402 increases the operation range and stability of the blade 401, making the cutting process more reliable and reducing the cutting error and the rate of defective products.

[0057] Compared with the original cutter position, the cutter assembly 4 is closer to the film surface and has a smaller included angle, which enables the cutter assembly 4 to cut into the lithium battery separator more accurately, reduces the shaking and deviation of the film surface during the cutting process, and makes the cutter and the film surface form an acute angle (about 60° for the best), so that the cutter can cut into the film surface in a more favorable way, reduces the cutting resistance, and improves the cutting efficiency.

[0058] The cutter pushing cylinder 405 can be controlled by the touch screen, and the cutter blade 401 can be controlled to move forward by the extension and retraction of the cylinder. When the operator issues an instruction on the touch screen, the active end of the cutter pushing cylinder 405 extends to push the sliding base 403 and the cutter blade 401 mounted thereon to move forward, thereby achieving the cutting of the lithium battery separator.

[0059] Embodiment 5

[0060] Please refer to Figures 1-11 The top film ring 501 includes a semicircular ring body at the front and a horizontal shaft body at the back, and the two ends of the semicircular ring body are connected to the two ends of the horizontal shaft body. The horizontal shaft body is connected to the assembly seat 502, and the assembly seat 502 is connected to the sliding base 403. The top film ring 501 is located below the cutter blade 401, and the arc top of the semicircular ring body is located in front of the cutter blade 401.

[0061] The working principle and technical effects of the above scheme are as follows:

[0062] The top film ring 501 is located below the cutter blade 401, and the arc top of the semicircular ring body is located in front of the cutter blade 401. When the cutter cuts into the film surface, the top film ring 501 will first contact the film surface. Due to the structure of the semicircular ring body and the horizontal shaft body of the top film ring 501, the top film ring 501 can push away the waves that may be generated on both sides of the cutting edge during the cutting process. The horizontal shaft body of the top film ring 501 is connected to the assembly seat 502, and the assembly seat 502 is connected to the sliding base 403, so that the top film ring 501 moves with the cutter and continuously smooths the film surface, ensuring that the contact position of the cutting edge and the film surface is smooth. The setting of the top film ring 501 effectively solves the problem of waves on both sides of the cutting edge during the cutting process. By pushing away the waves with the top film ring 501, the contact position of the cutting edge and the film surface is ensured to be smooth, reducing the occurrence of edge tearing. Not only does it improve the flatness of the cut film surface, but also reduces the rate of defective products, improves the overall quality of the lithium battery separator, enhances the market competitiveness of the product, and the linkage design of the top film ring 501 and the cutter blade 401 enables real-time smoothing of the film surface during the cutting process without the need for additional manual intervention, thereby improving production efficiency.

[0063] Embodiment 6

[0064] Please refer to Figures 1-11The rear end of the horizontal shaft body is fixedly connected with an air inlet pipe 503, the air inlet pipe 503 is communicated with a shunt chamber 504 in the horizontal shaft body, and the two ends of the shunt chamber 504 are communicated with the two ends of a diffusion chamber 505 in the semicircular ring body. An annular slit air port 506 concentric with the top membrane ring 501 is arranged at the end of the outer ring surface of the semicircular ring body away from the horizontal shaft body, the air outlet direction of the annular slit air port 506 is configured to make the blown gas flow to the outer edge direction on both sides of the cutout, and the flow cross section of the annular slit air port 506 is gradually reduced from the inside to the outside. The front end of the horizontal shaft body is fixedly connected with a shunt port communicated with the shunt chamber 504, a plurality of shunt pipes 507 are fixedly connected with the front end of the shunt port, the front end of the plurality of shunt pipes 507 is fixedly connected with the semicircular ring body, and the end of the plurality of shunt pipes 507 inserted into the diffusion chamber 505 is arranged towards a plurality of vertical flow uniformity columns 508, the plurality of vertical flow uniformity columns 508 are fixedly arranged in the diffusion chamber 505, and the plurality of shunt pipes 507 are located between the two ends of the annular slit air port 506.

[0065] The working principle and technical effects of the above scheme are as follows:

[0066] In the application, the gas enters from the air inlet pipe 503, the air inlet pipe 503 is communicated with the shunt chamber 504 in the horizontal shaft body, the gas is first dispersed in the shunt chamber 504, the shunt chamber 504 plays a role of initially homogenizing the entering gas, so that the gas can flow to the subsequent structure relatively balancedly, since the two ends of the shunt chamber 504 are communicated with the two ends of the diffusion chamber 505 in the semicircular ring body, then the gas can enter the diffusion chamber 505 through the two ends of the shunt chamber 504, and is shot out through the annular slit air port 506, the annular slit air port 506 can form a continuous, uniform and uninterrupted air curtain, the flatness of the whole cutout is consistent, the effect is most stable and reliable, the airflow reaches and starts to work before contacting the membrane surface of the top membrane ring, can blow away the debris in the area in advance, and initially blows open the wave pattern; and the flow cross section of the annular slit air port 506 is gradually reduced from the inside to the outside, the airflow energy is converted into higher speed, so as to form a thin, fast and powerful "air knife", the penetration is stronger, the flattening effect is better, the tapered wall surface can guide the airflow, so that the flow direction is more consistent, the turbulence and scattering are reduced, and the airflow can be accurately shot to the predetermined target area. The shunt port at the front end of the shunt chamber 504 guides the gas to the plurality of shunt pipes 507, the plurality of shunt pipes 507 are uniformly distributed, the gas is dispersed and delivered to the diffusion chamber 505 in the semicircular ring body again, when the gas is sprayed from the end of the shunt pipe 507 inserted into the diffusion chamber 505, the gas is sprayed towards the vertical flow uniformity columns 508 fixedly arranged in the diffusion chamber 505. The vertical flow uniformity columns 508 block and disperse the sprayed gas, so that the gas is more uniformly distributed in the diffusion chamber 505, the gas is prevented from being concentrated in some areas, and the secondary flow of the gas is realized.

[0067] In the present application, the plurality of shunt pipes 507 can more widely disperse the gas flowing out of the shunt chamber 504 into the dispersion chamber 505, making the initial distribution of the gas in the dispersion chamber 505 more uniform, providing a better basis for subsequent flow equalization processing; the plurality of shunt pipes 507 deliver gas in parallel, increasing the gas delivery channel, improving the flow and speed of the gas entering the dispersion chamber 505, ensuring that there is enough gas supply to the annular slit gas port 506 for blowing operation, ensuring the strength of the gas flow. The vertical flow equalization column 508 blocks and disperses the gas sprayed from the shunt pipe 507, making the gas form a more uniform distribution state in the dispersion chamber 505, breaking the concentrated flow trend of the gas, avoiding the situation that the gas is too strong or too weak in the dispersion chamber 505, making the gas flow blown out of the annular slit gas port 506 more uniform and stable; through the secondary flow equalization effect on the gas, the vertical flow equalization column 508 reduces the turbulence and vortex phenomenon in the gas flow process, making the gas flow more stable. This helps to improve the directionality and stability of the gas flow blown out of the annular slit gas port 506, ensuring that the gas flow can accurately blow to the outer edge direction of the two sides of the cut. The cooperation of the plurality of shunt pipes 507 and the vertical flow equalization column 508 makes the gas flow blown out of the annular slit gas port 506 more uniform, stable and high-speed, which can more effectively blow away the waste generated in the cutting process from the cutting area, reduce the waste adhesion and electrostatic adsorption phenomenon, at the same time, the film surface at the cutting position is better stabilized and smoothed, improving the cutting quality, making the edge after cutting more neat and smooth.

[0068] Example 7:

[0069] Please refer to Figures 1-11 , the horizontal shaft body is rotationally connected to the assembly seat 502, the assembly seat 502 is slidingly connected to the assembly slide block 509 in the longitudinal slide way, the assembly slide block 509 is threadedly connected with the angle adjusting screw 510 rotationally connected in the longitudinal slide way of the assembly seat 502, the locking screw is threadedly connected on the assembly slide block 509, the inner end of the locking screw abuts against the angle adjusting screw 510, the side of the assembly slide block 509 is rotationally connected to one end of the angle adjusting connecting rod 511, the other end of the angle adjusting connecting rod 511 is rotationally connected to the hinged horizontal shaft 512 on the side wall of the gas inlet pipe 503; the assembly seat 502 is connected to the strip-shaped assembly groove of the sliding base 403 through the cooperation of the bolts and nuts.

[0070] The working principle and technical effects of the above scheme are that: the design of the above structure can appropriately adjust the inclination angle of the semicircular ring body at the front of the top membrane ring 501, thereby realizing synchronous adjustment of the annular slit gas port 506, meeting the use requirements in different situations. When adjusting, first control the locking screw to release the clamping and fixing of the angle adjusting screw 510, then rotate the angle adjusting screw 510, the angle adjusting screw 510 changes the contact position with the assembly slide block 509 when rotating, thereby controlling the assembly slide block 509 to slide up and down in the longitudinal slide of the assembly seat 502, the assembly slide block 509 slides up and down to drive the one end of the angle adjusting connecting rod 511 to move up and down, the other end of the angle adjusting connecting rod 511 drives the air inlet pipe 503 to move through the hinged horizontal shaft 512, so that the horizontal shaft body rotates relative to the assembly seat 502, thereby completing the adjustment of the inclination angle of the semicircular ring body at the front of the top membrane ring 501.

[0071] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0072] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, or electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0073] Although the embodiments of the present application have been disclosed as above, they are not limited only to the applications listed in the specification and embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A heat setting post cutting device for lithium battery separator production, installed on the rack of a lithium battery separator production line, characterized in that, The utility model relates to a lithium battery separator cutting device, including: The utility model relates to a lithium battery separator cutting device, including: a clamping edge wheel mechanism (1), a cutter mechanism (2) and a single-arm pressure roller mechanism (3) arranged in sequence along the direction of travel of the lithium battery separator; the clamping edge wheel mechanism (1) is used for clamping and flattening the side edges of the lithium battery separator to be cut before cutting the lithium battery separator; The cutter mechanism (2) includes a cutter assembly (4) and a top flattening assembly (5) cooperating with the cutter assembly (4); the cutter assembly (4) is used for cutting the side edges of the lithium battery separator flattened by the clamping edge wheel mechanism (1); the top flattening assembly (5) is used for pushing the corrugations on both sides of the cutting edge outward after the cutter assembly (4) cuts into the lithium battery separator to flatten the lithium battery separator at the cutting position; the single-arm pressure roller mechanism (3) is used for isolating the surface tension of the lithium battery separator and smoothing the surface of the lithium battery separator and the waste edge after the cutter assembly (4) cuts the lithium battery separator; The cutter assembly (4) includes a blade (401) connected to an extended tool holder (402), and the extended tool holder (402) is connected to a sliding base (403); The top flattening assembly (5) includes a top membrane ring (501); the top membrane ring (501) includes a semicircular ring body at the front and a horizontal shaft body at the back, and the two ends of the semicircular ring body are connected to the two ends of the horizontal shaft body; the horizontal shaft body is connected to an assembly seat (502), and the assembly seat (502) is connected to the sliding base (403); the top membrane ring (501) is located below the blade (401), and the arc top of the semicircular ring body is located in front of the blade (401); The rear end of the horizontal shaft body is fixedly connected to an air inlet pipe (503), the air inlet pipe (503) communicates with a shunt chamber (504) in the horizontal shaft body, the two ends of the shunt chamber (504) communicate with the two ends of a dispersion chamber (505) in the semicircular ring body; one end of the outer ring surface of the semicircular ring body away from the horizontal shaft body is provided with an annular slit air port (506) concentric with the top membrane ring (501), the gas outlet direction of the annular slit air port (506) is configured to flow to the outer edge direction of the cutting edge, and the flow passage cross section of the annular slit air port (506) is gradually reduced from the inside to the outside; The front end of the horizontal shaft body is fixedly connected to a shunt port communicating with the shunt chamber (504) thereof, a plurality of shunt pipes (507) are uniformly fixedly connected to the front end of the shunt port, the front end of the plurality of shunt pipes (507) is fixedly connected to the semicircular ring body, one end of the plurality of shunt pipes (507) inserted into the dispersion chamber (505) is arranged towards a plurality of vertical flow equalization columns (508), the plurality of vertical flow equalization columns (508) are uniformly fixed in the dispersion chamber (505), and the plurality of shunt pipes (507) are located between the two ends of the annular slit air port (506).

2. The heat setting post cutting apparatus for lithium battery separator production according to claim 1, characterized in that, The combination of the clamping edge wheel mechanism (1), the cutter mechanism (2) and the single-arm pressure roller mechanism (3) is provided with two groups, and the two groups are symmetrically arranged on both sides of the travel path of the lithium battery separator to simultaneously cut and trim the edges of the lithium battery separator on both sides.

3. The heat setting post cutting apparatus for lithium battery separator production according to claim 1, characterized in that, The single-arm compression roller mechanism (3) comprises a fixed roller frame (301) mounted on a rack, one end of an active roller frame (302) being rotatably connected to the fixed roller frame (301), the other end of the active roller frame (302) being rotatably connected to a rubber roller (303) which can be elastically pressed on the lower surface of the lithium battery separator, a fixed end of a compression roller air cylinder (304) being rotatably connected to the fixed roller frame (301), and an active end of the compression roller air cylinder (304) being rotatably connected to the active roller frame (302) to control the active roller frame (302) to flip relative to the fixed roller frame (301), so that the rubber roller (303) is pressed on the lower surface of the lithium battery separator or separated from the lower surface of the lithium battery separator.

4. The heat setting post cutting apparatus for lithium battery separator production according to claim 3, characterized in that, The roller surface of the rubber roller (303) is wound with a low-hardness flexible material layer (305) to smooth the cut film surface and the scrap edge by pressing the low-hardness flexible material layer (305) on the lower surface of the lithium battery separator.

5. The heat setting post cutting apparatus for lithium battery separator production according to claim 4, characterized in that, The low-hardness flexible material layer (305) is EVA foam, which is arranged corresponding to the cutting position of the cutter mechanism (2); the width of the EVA foam covers 1 / 2 of the scrap edge area cut by the cutter mechanism (2), and the EVA foam only contacts the scrap edge area.

6. The heat setting post cutting apparatus for lithium battery separator production according to claim 1, characterized in that, The edge clamping wheel mechanism (1) is driven by a pneumatic driving mechanism connected thereto, and a pressure regulating valve mechanism is arranged on the gas source passage of the pneumatic driving mechanism; the pressure regulating valve mechanism is configured to control the gas pressure driving the edge clamping wheel mechanism (1) to be between 0.05 MPa and 0.15 MPa, so as to provide a constant clamping force to the side edge of the lithium battery separator; the clamping amount of the edge clamping wheel mechanism (1) clamping the side edge of the lithium battery separator is 1 / 2 of the required scrap edge width.

7. The heat setting post cutting apparatus for lithium battery separator production according to claim 1, characterized in that, The sliding base (403) is slidably connected to the pneumatic sliding table (404), and the pneumatic sliding table (404) and the sliding base (403) are respectively connected to the fixed end and the active end of the cutter advancing air cylinder (405); the pneumatic sliding table (404) is fixedly connected to the sliding block connecting seat (406), the sliding block connecting seat (406) is slidably connected to the linear guide rail (407), and the linear guide rail (407) is perpendicularly and staggeredly arranged with the pneumatic sliding table (404); the linear guide rail (407) is fixedly connected to the cutter base (408) with scale lines; the cutter base (408) is connected to the rack; a plurality of limiting locking holes are uniformly arranged on the linear guide rail (407), and a limiting locking piece is connected to the sliding block connecting seat (406), and the bottom of the limiting locking piece is inserted into one limiting locking hole.

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