Lithium battery diaphragm cutting device

Abstract

The utility model discloses a lithium battery diaphragm cutting device which comprises a cutting platform, a pressing assembly and a cutting assembly, and a lithium battery diaphragm to be cut is flatly laid on the cutting platform; the pressing assembly comprises two transverse pressing pieces and two longitudinal pressing pieces, and the two transverse pressing pieces are horizontally and transversely placed on the cutting platform in parallel and used for transversely pressing the lithium battery diaphragm; the two longitudinal pressing pieces are perpendicular to the transverse pressing piece, and the longitudinal pressing pieces are horizontally and longitudinally placed on the cutting platform in parallel and used for longitudinally pressing the lithium battery diaphragm. The cutting assembly is used for being in sliding connection with the two transverse pressing pieces or the two longitudinal pressing pieces and cutting the lithium battery diaphragm, so that the cutting assembly can move in the horizontal transverse direction or the horizontal longitudinal direction, it is guaranteed that the diaphragm does not displace and the periphery of the diaphragm does not curl in the cutting process, and the surface of a cut diaphragm sample is smooth and free of wrinkles; and meanwhile, in the operation process, cutting personnel do not need to make direct contact with a blade of the cutting assembly, and the safety of operators is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery diaphragm cutting and sampling, in particular to a lithium battery diaphragm cutting device. Background Art

[0002] As one of the main materials of lithium-ion batteries, lithium battery separators are used to separate the positive and negative electrodes of the battery to prevent the positive and negative electrodes from directly contacting each other and causing a short circuit. At the same time, the microporous structure of lithium battery separators facilitates the passage of lithium ions in the electrolyte during the charging and discharging process. The thermal stability of lithium battery separators can also ensure the safety performance of the battery when it fails at high temperatures. In other words, the difference in the performance of lithium battery separators directly determines the performance of the battery. Therefore, it is particularly important to conduct corresponding physical and chemical performance tests on the separators. During the test, cutting and sampling of separator samples is a prerequisite for the accuracy of the test results.

[0003] At present, the traditional method of cutting and sampling lithium battery separators is that operators directly use steel rulers and knives as cutting and sampling tools, but there are the following defects when cutting and sampling:

[0004] First, the deflection of the steel ruler may cause the opposite cutting edges on the diaphragm sample to be non-parallel, or burrs may appear at the knife-cut places on the diaphragm sample, resulting in wire drawing, which leads to irregular sampling.

[0005] Second, it is easy for a safety accident to occur where the knife accidentally injures the hand, and the safety of the operator cannot be guaranteed.

[0006] Third, the position of the steel ruler needs to be constantly adjusted, causing wrinkles to appear on the surface of the diaphragm, resulting in wrinkles in the diaphragm sample. When the diaphragm sample is tested for some physical and chemical properties such as air permeability and thermal shrinkage, the wrinkles in the diaphragm sample will affect the accuracy of the test results and affect the subsequent experimental data analysis. Utility Model Content

[0007] One of the main purposes of the utility model is to provide a lithium battery diaphragm cutting device, which can effectively make the opposite cutting edges of the cut diaphragm samples parallel, and ensure that the diaphragm does not shift or curl around during the cutting process, so that the surface of the cut diaphragm sample is smooth and wrinkle-free, which is beneficial to the subsequent physical and chemical property testing of the diaphragm. At the same time, during the operation, the cutting personnel do not need to directly contact the blade, which is beneficial to ensure the safety of the operator and improve the safety of diaphragm cutting.

[0008] In order to achieve the above-mentioned utility model purpose, the utility model proposes a lithium battery diaphragm cutting device, comprising:

[0009] A cutting platform, used for laying out the lithium battery separator to be cut;

[0010] A pressing assembly, placed on the cutting platform, for pressing the four sides of the lithium battery separator;

[0011] The cutting assembly includes a slide bar and a cutting blade. The cutting blade can be slidably arranged on the slide bar along the length direction of the slide bar. The slide bar is used to be slidably connected with the clamping assembly so that the cutting blade can cut the lithium battery separator horizontally or vertically under the drive of the slide bar.

[0012] Furthermore, the clamping assembly includes at least two transverse clamping members and at least two longitudinal clamping members, and the at least two transverse clamping members are placed horizontally and parallelly on the cutting platform to compress the lithium battery separator laterally; the at least two longitudinal clamping members are perpendicular to the transverse clamping members, and the at least two longitudinal clamping members are placed horizontally and longitudinally in parallel on the cutting platform to compress the lithium battery separator longitudinally.

[0013] Furthermore, the slide bar is used to be slidably connected to the clamping assembly in the horizontal transverse direction or the horizontal longitudinal direction, so that the slide bar can move in the horizontal transverse direction or the horizontal longitudinal direction relative to the clamping assembly.

[0014] Furthermore, a roller is rotatably provided on the sliding rod, a first concave groove extending in a horizontal transverse direction is provided on the clamping assembly, and a second concave groove extending in a horizontal longitudinal direction is also provided on the clamping assembly, and the roller can roll in the first concave groove along the first concave groove or roll in the second concave groove along the second concave groove.

[0015] Furthermore, the upper surface of the cutting platform is provided with magnets, the bottom of the clamping assembly is provided with magnets, and the magnets on the clamping assembly are attracted to the magnets on the cutting platform.

[0016] Furthermore, the cutting assembly also includes a sliding sleeve, which is sleeved on the sliding rod and can be locked on the sliding rod through a self-locking structure, and the cutting blade is fixed on the sliding sleeve.

[0017] Furthermore, the self-locking structure includes a threaded hole and a locking piece formed on the sliding sleeve, the threaded hole is communicated with an inner cavity of the sliding sleeve, and the locking piece is threadedly connected to the threaded hole.

[0018] Furthermore, two cutting blades are provided, two sliding sleeves are provided, and the two cutting blades are respectively fixed on the two sliding sleeves.

[0019] Furthermore, a linear scale extending along the axial direction of the sliding rod is arranged on the outer peripheral surface of the sliding rod.

[0020] Furthermore, the upper surface of the cutting platform is provided with linear scales in both the horizontal and vertical directions.

[0021] Compared with the prior art, the lithium battery diaphragm cutting device of the utility model has the following beneficial effects:

[0022] 1. When the utility model is in use, the lithium battery diaphragm to be cut is first laid flat on the upper surface of the cutting platform; then, the lithium battery diaphragm laid on the cutting platform is tightened horizontally and longitudinally by two horizontal and parallel horizontal clamping members placed on the cutting platform and two horizontal and longitudinal clamping members placed on the cutting platform, and then the slide bar is slidably connected with the two horizontal clamping members so that the slide bar can move horizontally and transversely, so that the slide bar can be driven to move horizontally and transversely so that the two cutting blades can realize transverse cutting of the lithium battery diaphragm; finally, the slide bar is disengaged from the two horizontal clamping members, and then the slide bar is slidably connected with the two longitudinal clamping members so that the slide bar can move horizontally and longitudinally, so that the slide bar can be driven to move horizontally and longitudinally so that the two cutting blades can realize longitudinal cutting of the lithium battery diaphragm, thereby completing the cutting of the diaphragm sample. In the process of transverse cutting of the diaphragm, because the two cutting blades on the slide bar are parallel to the transverse clamping piece, and the sliding connection between the slide bar and the transverse clamping piece limits the slide bar to only horizontal transverse movement along the transverse clamping piece, the two horizontally relative cutting edges on the diaphragm sample are parallel to each other; in the process of longitudinal cutting of the diaphragm, because the two cutting blades on the slide bar are parallel to the longitudinal clamping piece, and the sliding connection between the slide bar and the longitudinal clamping piece limits the slide bar to only horizontal longitudinal movement along the longitudinal clamping piece, the two horizontally relative cutting edges on the diaphragm sample are parallel to each other, so that the opposite cutting edges on the diaphragm sample cut by the lithium battery diaphragm cutting device of the utility model can be effectively made parallel and the cuts can be smooth.

[0023] 2. In the process of cutting the diaphragm, the utility model uses two horizontal and parallel horizontal pressing members placed on the cutting platform and two horizontal and parallel longitudinal pressing members placed on the cutting platform to press the lithium battery diaphragm flat on the cutting platform horizontally and longitudinally, thereby ensuring that the diaphragm does not shift and does not curl around, so that the surface of the cut diaphragm sample is smooth and wrinkle-free, which is beneficial to the subsequent physical and chemical property testing of the diaphragm. At the same time, during the operation, the cutting personnel do not need to directly contact the blade, which is beneficial to ensuring the safety of the operator and improving the safety of diaphragm cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the lithium battery diaphragm cutting device of the utility model;

[0025] Figure 2 This is a front view of the lithium battery diaphragm cutting device of the utility model;

[0026] Figure 3It is a top view of the lithium battery diaphragm cutting device of the utility model.

[0027] Reference numerals in the accompanying drawings:

[0028] 10. Cutting platform; 20. Horizontal pressing member; 201. First concave slide groove; 21. Longitudinal pressing member; 210. Second concave slide groove; 30. Slide rod; 31. First cutting blade; 310. First sliding sleeve; 311. First fixing bolt; 32. Second cutting blade; 320. Second sliding sleeve; 321. Second fixing bolt; 33. Roller; 330. Roller sleeve; 331. Roller bearing. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] In the description of the present invention, it should be understood that the terms "width", "up", "down", "front", "back", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" 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, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, a horizontal feature "above" or "below" a second feature may include that the horizontal feature is in direct contact with the second feature, or may include that the horizontal feature is not in direct contact with the second feature but is in contact through another feature between them. Moreover, a horizontal feature "above", "above" and "above" the second feature includes that the horizontal feature is directly above and obliquely above the second feature, or simply indicates that the horizontal feature is higher in level than the second feature. A horizontal feature "below", "below" and "below" the second feature includes that the horizontal feature is directly below and obliquely below the second feature, or simply indicates that the horizontal feature is lower in level than the second feature.

[0033] Please refer to Figure 1-Figure 3The utility model proposes a lithium battery diaphragm cutting device in the horizontal aspect, including a cutting platform 10, a pressing assembly and a pressing assembly; wherein the cutting platform 10 is used to lay out the lithium battery diaphragm to be cut; the pressing assembly is placed on the cutting platform 10, and is used to press the four sides of the lithium battery diaphragm laid out on the cutting platform 10; the pressing assembly is placed on the cutting platform 10, and is used to press the four sides of the lithium battery diaphragm; the cutting assembly includes a slide bar 30 and a cutting blade, and the cutting blade can be slidably arranged on the slide bar 30 along the length direction of the slide bar 30, and the slide bar 30 is used to be slidably connected with the pressing assembly, so that the cutting blade can cut the lithium battery diaphragm in the horizontal horizontal direction or the horizontal vertical direction under the drive of the slide bar 30. Specifically, the slide bar 30 is used to be slidably connected with the pressing assembly in the horizontal horizontal direction or the horizontal vertical direction, so that the slide bar 30 can move in the horizontal horizontal direction or the horizontal vertical direction relative to the pressing assembly, so that the lithium battery diaphragm can be cut in the horizontal horizontal direction or the horizontal vertical direction under the drive of the slide bar 30. It can be seen from this that when it is necessary to cut the lithium battery diaphragm horizontally, the slide bar 30 can be slidably connected to the clamping assembly in the horizontal transverse direction. By driving the slide bar 30 to move in the horizontal transverse direction, the cutting blade can be driven to cut the lithium battery diaphragm horizontally, and by adjusting the position of the cutting blade on the slide bar 30, the cutting blade can continue to cut the lithium battery diaphragm horizontally; when it is necessary to cut the lithium battery diaphragm horizontally, the slide bar 30 can be slidably connected to the clamping assembly in the horizontal longitudinal direction. By driving the slide bar 30 to move in the horizontal longitudinal direction, the cutting blade can be driven to cut the lithium battery diaphragm horizontally, and by adjusting the position of the cutting blade on the slide bar 30, the cutting blade can continue to cut the lithium battery diaphragm horizontally, thereby effectively making the opposite cutting edges on the cut diaphragm sample parallel.

[0034] In one embodiment, two cutting blades are provided, namely, a first cutting blade 31 and a second cutting blade 32, the first cutting blade 31 and the second cutting blade 32 are parallel to each other and are both provided on a slide bar 30, the slide bar 30 is used for sliding connection with a clamping assembly, and the first cutting blade 31 and the second cutting blade 32 cut the lithium battery diaphragm compressed by the clamping assembly horizontally or vertically under the drive of the slide bar. It can be seen that the lithium battery diaphragm cutting device of the utility model compresses the four sides of the lithium battery diaphragm laid flat on the cutting platform 10 by the clamping assembly, so that the lithium battery diaphragm is ensured not to be displaced and not to be curled in the cutting process, so that the surface of the cut diaphragm sample is smooth and wrinkle-free, which is conducive to the subsequent physical and chemical performance testing of the diaphragm, and at the same time, the cutting personnel do not need to directly contact the blades during the operation, which is conducive to ensuring the safety of the operator and improving the safety of the diaphragm cutting. In addition, the slide bar 30 is slidably connected to the pressing assembly, so that the first cutting blade 31 and the second cutting blade 32 parallel to each other are driven by the slide bar 30 to horizontally cut the lithium battery diaphragm pressed by the pressing assembly or horizontally cut vertically.

[0035] In one embodiment, the clamping assembly includes two transverse clamping members 20 and two longitudinal clamping members 21. The number of the transverse clamping members 20 and the longitudinal clamping members 21 is not limited to two. The two transverse clamping members 20 are placed horizontally and parallelly on the cutting platform 10 for transversely clamping the lithium battery diaphragm. At least two longitudinal clamping members 21 are perpendicular to the transverse clamping members 20, and at least two longitudinal clamping members 21 are placed horizontally and longitudinally on the cutting platform 10 for longitudinally clamping the lithium battery diaphragm; the two cutting blades are respectively a first cutting blade 31 and a second cutting blade 32, and the first cutting blade 31 and the second cutting blade 32 are used to cut the lithium battery diaphragm; the sliding rod 30 is used to be slidably connected with at least two transverse clamping members 20 or with at least two longitudinal clamping members 21, so that the sliding rod 30 can move horizontally or horizontally. Of course, when the slide rod 30 is slidably connected to the transverse pressing member 20, the first cutting blade 31 or the second cutting blade 32 is parallel to the transverse pressing member 20; when the slide rod 30 is slidably connected to the longitudinal pressing member 21, the first cutting blade 31 or the second cutting blade 32 is parallel to the longitudinal pressing member 21.

[0036] As can be seen from the above, when the lithium battery diaphragm cutting device of the utility model is used, the lithium battery diaphragm to be cut is first laid flat on the upper surface of the cutting platform 10; then, the lithium battery diaphragm laid flat on the cutting platform 10 is tightened horizontally and longitudinally by two horizontal and parallel horizontal pressing members 20 placed on the cutting platform 10 and two horizontal and longitudinal pressing members 21 placed on the cutting platform 10 are placed horizontally and longitudinally, and then the slide bar 30 is slidably connected with the two horizontal pressing members 20 so that the slide bar 30 can move horizontally and transversely, so that the slide bar 30 can be driven to move horizontally and transversely. The first cutting blade 31 and the second cutting blade 32 realize transverse cutting of the lithium battery diaphragm; finally, the slide bar 30 is disengaged from the two transverse clamping members 20, and the slide bar 30 is slidably connected with the two longitudinal clamping members 21, so that the slide bar 30 can move horizontally and longitudinally. In this way, the slide bar 30 is driven to move horizontally and longitudinally, so that the first cutting blade 31 and the second cutting blade 32 can realize longitudinal cutting of the lithium battery diaphragm, thereby completing the cutting of the diaphragm sample without moving the diaphragm, thereby reducing errors during the operation and ensuring the surface flatness and smoothness of the cut diaphragm sample.

[0037] It should be noted that, in the process of transverse cutting of the diaphragm, because the first cutting blade 31 and the second cutting blade 32 on the slide bar 30 are parallel to the transverse clamping piece 20, and the sliding connection between the slide bar 30 and the transverse clamping piece 20 limits the slide bar 30 to only horizontal transverse movement along the transverse clamping piece 20, the two horizontally relative cutting edges on the diaphragm sample are parallel to each other; in the process of longitudinal cutting of the diaphragm, because the first cutting blade 31 and the second cutting blade 32 on the slide bar 30 are parallel to the longitudinal clamping piece 21, and the sliding connection between the slide bar 30 and the longitudinal clamping piece 21 limits the slide bar 30 to only horizontal longitudinal movement along the longitudinal clamping piece 21, the two horizontally relative cutting edges on the diaphragm sample are parallel to each other, so that the opposite cutting edges on the diaphragm sample cut by the lithium battery diaphragm cutting device of the present invention can be effectively made parallel and the cuts can be smooth.

[0038] In addition, in the process of cutting the diaphragm, the lithium battery diaphragm laid flat on the cutting platform 10 is compressed horizontally and longitudinally by two horizontal compression members 20 placed horizontally and parallelly on the cutting platform 10 and two horizontal longitudinal compression members 21 placed horizontally and parallelly on the cutting platform 10, thereby ensuring that the diaphragm does not shift and does not curl around, so that the surface of the cut diaphragm sample is smooth and wrinkle-free, which is beneficial to the subsequent physical and chemical property testing of the diaphragm. At the same time, during the operation, the cutting personnel do not need to directly contact the blade, which is beneficial to ensuring the safety of the operator and improving the safety of diaphragm cutting.

[0039] In summary, by using the lithium battery diaphragm cutting device of the present invention, the flatness of the battery diaphragm can be ensured while cutting and sampling the lithium battery diaphragm, the dimensional accuracy of the diaphragm sample can be ensured, the sampling efficiency is higher, and the safety of the diaphragm sampling process is improved.

[0040] In one embodiment, a roller 33 is rotatably provided on the slide bar 30, and a guide groove extending in the horizontal lateral direction or the horizontal longitudinal direction is provided on the clamping assembly, and the roller can roll along the guide groove, so that the slide bar 30 can move in the horizontal lateral direction or the horizontal longitudinal direction. Specifically, rollers 33 are rotatably provided at opposite ends of the slide bar 30, and the rotatable axis of the roller 33 is parallel to the slide bar 30. The upper surface of the transverse clamping member 20 of the clamping assembly is provided with a first concave chute 201 extending in the horizontal lateral direction. When the slide bar 30 and the transverse clamping member 20 need to be slidably connected, the rollers 33 at opposite ends of the slide bar 30 only need to be placed in the first concave chute 201 of the two transverse clamping members 20, so that the rollers 33 can freely roll in the horizontal lateral direction in the first concave chute 201. Of course, under the restriction of the first concave chute 201, the rollers 33 can only move in the horizontal lateral direction in the first concave chute 201. That is, it can be understood that when the roller 33 moves in the first concave chute 201, the roller 33 can only move in the horizontal lateral direction in the first concave chute 201 under the restriction of the first concave chute 201. Therefore, it can be known that when the first cutting blade 31 and the second cutting blade 32 perform transverse cutting on the diaphragm, the transverse double-sided guide rail is used to limit the movement of the slide bar 30, and the first cutting blade 31 and the second cutting blade 32 on the slide bar 30 are indirectly controlled to move horizontally and transversely to cut the diaphragm, so that the two opposite transverse cutting edges on the diaphragm sample are parallel and the cut is smooth.

[0041] Similarly, the upper surface of the longitudinal pressing member 21 of the pressing assembly is provided with a second concave chute 210 extending in the horizontal longitudinal direction. When the slide bar 30 needs to be slidably connected to the longitudinal pressing member 21, the rollers 33 at the opposite ends of the slide bar 30 only need to be placed in the second concave chute 210 of the two longitudinal pressing members 21, so that the rollers 33 can freely roll in the horizontal longitudinal direction in the second concave chute 210. Of course, the rollers 33 can only move in the horizontal longitudinal direction in the second concave chute 210 under the restriction of the second concave chute 210. That is to say, it can be understood that when the rollers 33 move in the second concave chute 210, the rollers 33 can only move in the horizontal longitudinal direction in the second concave chute 210 under the restriction of the second concave chute 210. It can be seen from this that when the first cutting blade 31 and the second cutting blade 32 perform longitudinal cutting on the diaphragm, the longitudinal double-sided guide rails are used to limit the movement of the slide bar 30, and the first cutting blade 31 and the second cutting blade 32 on the slide bar 30 are indirectly controlled to move horizontally longitudinally to cut the diaphragm, so that the two relative longitudinal cutting edges on the diaphragm sample are parallel and the incision is smooth.

[0042] Of course, in other embodiments, a slider is also provided on the slide rod, and a guide rail extending along the horizontal transverse direction or the horizontal longitudinal direction is provided on the clamping assembly. The slide rod is slidably connected to the guide rail through the slider, and the slide rod can also move along the horizontal transverse direction or the horizontal longitudinal direction, which is not limited here.

[0043] In one embodiment, roller sleeves 330 are sleeved and fixed at opposite ends of the roller 33 , and roller bearings 331 are disposed on the roller sleeves 330 . The roller 33 is rotatably mounted on the roller sleeves 330 through the roller bearings 331 .

[0044] In one embodiment, the upper surface of the cutting platform 10 is provided with magnets, and the cutting platform 10 can use a magnet block so that the upper surface of the cutting platform 10 has magnets; of course, the bottom of the clamping assembly is provided with magnets, and the magnets on the clamping assembly are attracted to the magnets on the cutting platform. Specifically, the bottom of the transverse clamping member 20 of the clamping assembly is provided with magnets, and the bottom magnets of the transverse clamping member 20 can come from the magnetic strip fixed on the bottom surface of the transverse clamping member 20, and the magnets on the transverse clamping member 20 are attracted to the magnets on the cutting platform 10, so that the bottom of the transverse clamping member 20 and the upper surface of the cutting platform 10 can be magnetically attracted to each other, thereby horizontally compressing the lithium battery diaphragm laid on the upper surface of the cutting platform 10. Similarly, the bottom of the longitudinal clamping piece 21 of the clamping assembly is provided with magnets. The magnetism at the bottom of the longitudinal clamping piece 21 can come from a magnet fixed on the bottom surface of the longitudinal clamping piece 21. The magnetism on the longitudinal clamping piece 21 is attracted to the magnetism on the cutting platform 10. In this way, the bottom of the longitudinal clamping piece 21 and the upper surface of the cutting platform 10 can be magnetically attracted to each other, thereby longitudinally compressing the lithium battery diaphragm laid flat on the upper surface of the cutting platform 10.

[0045] In one embodiment, the upper surface of the cutting platform 10 is provided with linear scales in both the horizontal and vertical directions, so that the cutting assembly can easily cut and sample the membrane, thereby achieving the purpose of accurately cutting the membrane.

[0046] In one embodiment, the cutting assembly further includes a sliding sleeve, which can be slidably mounted on the slide bar 30; wherein, there are two sliding sleeves, namely, a first sliding sleeve 310 and a second sliding sleeve 320, which are both provided with a self-locking structure, and the first sliding sleeve 310 and the second sliding sleeve 320 are both slidably mounted on the slide bar 30, and can be locked on the slide bar 30 through their respective self-locking structures; the first cutting blade 31 and the second cutting blade 32 are respectively fixed to the first sliding sleeve 310 and the second sliding sleeve 320 by fixing screws. That is, it can be understood that the cutting positions of the first cutting blade 31 and the second cutting blade 32 can be adjusted on the slide bar 30 to cut diaphragm samples of different sizes, thereby improving the diversity of diaphragm sample acquisition.

[0047] In one embodiment, a linear scale extending along the axial direction is provided on the outer peripheral surface of the slide rod 30, which can greatly facilitate the selection of the diaphragm sample size and improve the sampling efficiency of the diaphragm detection. Different detections have different size requirements, which greatly improves the functional scalability of the sampling device.

[0048] In one embodiment, the first sliding sleeve 310 can be adjusted according to the size of the desired cut diaphragm sample. After the position of the first sliding sleeve 310 is determined, the first sliding sleeve 310 is fixed using the first fixing bolt 311. Similarly, after the second sliding sleeve 320 is adjusted and the position of the second sliding sleeve 320 is determined, the second sliding sleeve 320 is fixed using the second fixing bolt 321.

[0049] In one embodiment, the self-locking structure includes a threaded hole and a locking member provided on the sliding sleeve, the threaded hole is connected to the inner cavity of the sliding sleeve, and the locking member is threadedly connected to the threaded hole. Specifically, in the self-locking structure of the first sliding sleeve 310, the threaded hole is a threaded hole provided on the first sliding sleeve 310, and the locking member is a first fixing bolt 311 threadedly connected to the threaded hole on the first sliding sleeve 310; in the self-locking structure of the second sliding sleeve 320, the threaded hole is a threaded hole provided on the second sliding sleeve 320, and the locking member is a second fixing bolt 321 threadedly connected to the threaded hole on the second sliding sleeve 320. Taking the self-locking of the self-locking structure of the first sliding sleeve 310 as an example to explain how to self-lock, when the first fixing bolt 311 abuts and presses against the surface of the sliding rod 30 and is threadedly locked with the threaded hole on the first sliding sleeve 310, the first sliding sleeve 310 can be locked on the sliding rod 30. Since the self-locking structure on the first sliding sleeve 310 is the same as the self-locking structure on the second sliding sleeve 320 , how the self-locking structure on the second sliding sleeve 320 is self-locked will not be described in detail here.

[0050] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lithium battery diaphragm cutting device, characterized in that: include: A cutting platform, used for laying out the lithium battery separator to be cut; A pressing assembly, placed on the cutting platform, for pressing the four sides of the lithium battery separator; The cutting assembly includes a slide bar and a cutting blade. The cutting blade can be slidably arranged on the slide bar along the length direction of the slide bar. The slide bar is used to be slidably connected with the clamping assembly so that the cutting blade can cut the lithium battery separator horizontally or vertically under the drive of the slide bar.

2. The lithium battery separator cutting device according to claim 1, characterized in that: The clamping assembly includes at least two transverse clamping members and at least two longitudinal clamping members. The at least two transverse clamping members are placed horizontally and parallelly on the cutting platform to compress the lithium battery separator horizontally. The at least two longitudinal clamping members are perpendicular to the transverse clamping members, and the at least two longitudinal clamping members are placed horizontally and parallelly on the cutting platform to compress the lithium battery separator longitudinally.

3. The lithium battery separator cutting device according to claim 1, characterized in that: The slide bar is used for being slidably connected with the clamping assembly in the horizontal transverse direction or the horizontal longitudinal direction, so that the slide bar can move in the horizontal transverse direction or the horizontal longitudinal direction relative to the clamping assembly.

4. The lithium battery separator cutting device according to claim 1, characterized in that: A roller is rotatably provided on the sliding rod, a first concave groove extending in a horizontal transverse direction is provided on the clamping assembly, and a second concave groove extending in a horizontal longitudinal direction is also provided on the clamping assembly. The roller can roll in the first concave groove along the first concave groove or roll in the second concave groove along the second concave groove.

5. The lithium battery separator cutting device according to claim 1, characterized in that: The upper surface of the cutting platform is provided with magnets, the bottom of the clamping assembly is provided with magnets, and the magnets on the clamping assembly are attracted to the magnets on the cutting platform.

6. The lithium battery separator cutting device according to claim 1, characterized in that: The cutting assembly further comprises a sliding sleeve, which is sleeved on the sliding rod and can be locked on the sliding rod through a self-locking structure, and the cutting blade is fixed on the sliding sleeve.

7. The lithium battery separator cutting device according to claim 6, characterized in that: The self-locking structure comprises a threaded hole and a locking piece which are formed on the sliding sleeve. The threaded hole is communicated with the inner cavity of the sliding sleeve, and the locking piece is threadedly connected with the threaded hole.

8. The lithium battery separator cutting device according to claim 6, characterized in that: The two cutting blades are provided with two, the two sliding sleeves are provided with two, and the two cutting blades are respectively fixed on the two sliding sleeves.

9. Two cutting blades The lithium battery diaphragm cutting device according to claim 1, characterized in that: The outer peripheral surface of the slide rod is provided with a linear scale extending along the axial direction thereof.

10. The lithium battery separator cutting device according to claim 1 or 9, characterized in that: The upper surface of the cutting platform is provided with linear scales in both the horizontal and vertical directions.

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