Lithium battery diaphragm cutting device

Abstract

The utility model relates to the technical field of battery film production, and provides a lithium battery diaphragm cutting device which comprises a machine body, and a lithium battery diaphragm is arranged on the machine body in a circulating conveying mode. The cutter is rotationally arranged on the machine body and used for cutting out waste edges. The material collecting piece is rotationally arranged on the machine body and located on one side of the cutter, and the material collecting piece is used for winding and collecting waste edges after rotating; the machine body is provided with a guide sliding groove, an included angle is formed between the length direction of the guide sliding groove and the conveying direction of the lithium battery diaphragm in the horizontal direction, and the angle range of the included angle is 0-90 degrees; the twisting roller slides through the first sliding block and is arranged in the guiding sliding groove in a relative rotation mode, and the waste edge is used for being wound around the waste edge after being guided by the twisting roller. According to the technical scheme, the technical problem that in the prior art, due to the fact that the length of the slitter edge and the linear speed of the driving roller cannot be matched in real time, faults occur in the cutting or collecting process in the winding process of the slitter edge is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of battery film production technology, and more specifically, to a lithium battery separator cutting device. Background Technology

[0002] This utility model relates to the field of lithium battery production technology, specifically to a lithium battery separator cutting device. As a core component of lithium-ion batteries, the cutting quality of the lithium battery separator directly affects battery performance. During separator production, the cutting process requires removing excess burrs from the edges to meet dimensional accuracy requirements. Existing technologies typically use active collection rollers to wind and collect the cut waste edges. However, in practical applications, the following technical problems exist: lithium battery separator materials have a certain elastic modulus, and during continuous production, they are affected by factors such as raw material fluctuations and equipment precision, resulting in a tolerance range of ±0.5mm for the width of the cut waste edges. Traditional active collection rollers use a constant-speed winding method. When the waste edge width changes, the length of waste edge collected per unit time cannot match the linear speed of the active roller in real time, leading to tension fluctuations in the waste edge during winding. Specifically, when the width of the waste edge increases, the mass of waste edge collected per unit time increases. If the linear speed of the drive roller remains unchanged, the winding tension will be too tight, which may cause the diaphragm to tear. Conversely, when the width of the waste edge decreases, the winding tension will be relaxed, and the waste edge will easily fall off the collecting roller, resulting in a loose winding structure and affecting the stability of subsequent cutting processes. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a lithium battery separator cutting device, which solves the technical problem in the prior art that the waste edge length and the active roller speed cannot be matched in real time, causing the waste edge to cause failure in the cutting or collection process during the winding process.

[0004] According to one aspect, at least one embodiment of this disclosure provides a lithium battery separator cutting apparatus for cutting off waste edges of the lithium battery separator, comprising:

[0005] The body of the machine, wherein the lithium battery separator is disposed on the body for cyclic conveying;

[0006] A cutter, rotatably mounted on the machine body, is used to cut off the waste edge;

[0007] A material collecting component is rotatably mounted on the machine body and located on one side of the cutter. The material collecting component is used to collect the waste edge after rotation.

[0008] The machine body has a guide groove, the length direction of the guide groove is set at an angle to the horizontal direction of the lithium battery separator, and the angle range is 0~90°.

[0009] A torsion roller is disposed in the guide groove by sliding and rotating relative to a first slider, and the waste edge is wound around the waste edge after being guided by the torsion roller.

[0010] For example, at least one embodiment of this disclosure provides a lithium battery separator cutting device, wherein the rotation axis of the torsion roller is inclined relative to the vertical direction.

[0011] For example, at least one embodiment of this disclosure provides a lithium battery separator cutting device, which further includes:

[0012] A first elastic element, one end of which acts on the side wall of the guide groove and the other end of which acts on the first slider, is used to provide a force that drives the first slider to slide the torsion roller away from the cutter.

[0013] For example, at least one embodiment of this disclosure provides a lithium battery separator cutting device, wherein one side of the machine body has a collection hopper, and the collection hopper is located on one side of the lithium battery separator conveying direction, the collecting element is rotatably disposed inside the collection hopper, and the side wall of the collection hopper is provided with a vertical sliding groove, and further includes:

[0014] The second slider is slidably and vertically disposed within the vertical groove;

[0015] The first support roller is rotatably mounted on the second slider, and the rotation axis of the first support roller is in the horizontal direction. The first support roller is used to support the waste edge after passing through the torsion roller.

[0016] For example, at least one embodiment of this disclosure provides a lithium battery separator cutting device, which further includes:

[0017] The second support roller is rotatably mounted on the inner wall of the hopper, and the rotation axes of the first support roller and the second support roller are parallel. The first support roller, the second support roller and the material collection component are arranged sequentially along the length of the hopper. After being guided by the torsion roller, the waste edge is wound around the material collection component after passing sequentially through the bottom of the first support roller and the top of the second support roller.

[0018] For example, at least one embodiment of this disclosure provides a lithium battery separator cutting device, which further includes a second elastic member. One end of the second elastic member acts on the bottom wall of the vertical groove, and the other end acts on the second slider, providing a force for the second slider to slide down.

[0019] For example, a lithium battery separator cutting device provided in at least one embodiment of this disclosure further includes:

[0020] The third support roller is rotatably mounted on the machine body. The rotation axis of the third support roller is vertical, and the third support roller is located between the second support roller and the cutter. It is used to receive the waste edge between the torsion roller and the third support roller.

[0021] For example, at least one embodiment of this disclosure provides a lithium battery separator cutting device in which the middle sections of the torsion roller, the first support roller, the second support roller and the third support roller all have recesses.

[0022] For example, at least one embodiment of this disclosure provides a lithium battery separator cutting device, wherein a drive shaft on the machine body for driving the lithium battery separator to be conveyed is connected to the material collection component.

[0023] For example, at least one embodiment of this disclosure provides a lithium battery separator cutting device, wherein the bottom wall of the collecting hopper near one end of the cutter is provided with a chip outlet, and the device also includes a fan, which is disposed on the bottom wall outside the chip outlet and is used to suck out debris from inside the collecting hopper through the chip outlet.

[0024] The beneficial effects of the embodiments disclosed herein are as follows:

[0025] In this disclosure, due to the tolerance in the width of the waste edge after cutting the lithium battery separator, the traditional constant-speed winding method is prone to fluctuations in winding tension. However, in this device, when the waste edge width changes, the lateral force exerted by the waste edge on the torsion roller changes accordingly. The torsion roller slides within a guide groove via a first slider, automatically adjusting its position based on changes in lateral force. For example, when the waste edge width increases, the lateral force exerted by the waste edge on the torsion roller per unit time increases, causing the torsion roller to slide in the corresponding direction within the guide groove, changing the waste edge guiding angle. This adjusts the winding position and tension of the waste edge on the collecting element, ensuring that the winding tension remains within a suitable range, avoiding problems such as separator tearing due to excessive tension or waste edge detachment due to slack tension. Stable winding tension ensures the quality of waste edge winding, avoids damage to the lithium battery separator caused by tension issues, thereby improving the overall quality of the lithium battery separator product and providing reliable raw materials for subsequent battery assembly processes. The guide chute is set at an angle to the lithium battery separator conveying direction, and the torsion roller provides guidance, allowing the waste edges to be guided to the collection unit along a preset path after being cut. This guiding mechanism avoids disorderly entanglement of the waste edges during the winding process, ensuring the tightness and neatness of the winding structure, which helps improve the collection efficiency of the collection unit and reduce waste during the collection process. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a lithium battery separator cutting device in one embodiment of the present disclosure;

[0028] Figure 2 for Figure 1 A partially enlarged structural diagram of section A in the middle;

[0029] Figure 3 for Figure 1 A partially enlarged structural diagram of section B in the middle;

[0030] Figure 4 for Figure 1 A magnified schematic diagram of part C in the middle.

[0031] In the diagram: Machine body-1, guide chute-101, hopper-102, vertical chute-103, cutter-2, chip outlet-201, collecting component-3, torsion roller-4, recess-401, first slider-5, first elastic component-6, second slider-7, first support roller-8, second support roller-9, second elastic component-10, third support roller-11, fan-12. Detailed Implementation

[0032] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0033] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0034] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0035] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0037] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] For example, such as Figures 1-4The diagram illustrates a lithium battery separator cutting device according to one embodiment of this disclosure, used to cut off the waste edges of the lithium battery separator. The machine body 1 serves as the supporting structure for the entire cutting device, providing a foundation for the installation and operation of other components. It is typically constructed of a robust metal frame with sufficient strength and stability to ensure that the lithium battery separator does not wobble or deform during the cutting process, thus affecting the cutting accuracy. The machine body 1 is equipped with channels and related devices for the cyclical transport of the lithium battery separator, such as conveyor rollers and drive belts. These devices work together to ensure that the lithium battery separator is transported smoothly and continuously on the machine body 1. A guide chute 101 is provided on the machine body 1, its length direction forming a certain angle with the horizontal direction of the lithium battery separator transport, the angle ranging from 0 to 90°. The guide chute 101 provides a sliding track for the torsion roller 4 and, by setting its angle with the separator transport direction, changes the guide path of the waste edge, thereby affecting the waste edge winding process. The inner wall of the guide chute 101 is finely machined to have a smooth surface, reducing friction on the torsion roller 4 during sliding and ensuring smooth movement within the chute. The cutter 2, rotatably mounted on the machine body 1, is a key component for cutting waste edges of the lithium battery separator. The cutter 2 is driven by a motor or other power device (not shown in the diagram) to rotate at a certain speed. The cutter 2 has a sharp and wear-resistant blade, enabling it to quickly and accurately cut off excess material during the lithium battery separator conveying process, forming waste edges. The rotating shaft of the cutter 2 is mounted on the machine body 1 via bearings and other components, ensuring the stability and accuracy of its rotation, thereby guaranteeing the quality of the cut. The collecting component 3 is also rotatably mounted on the machine body 1, located to one side of the cutter 2. The collecting component 3 is typically cylindrical with a certain surface roughness to better wrap and collect the waste edges. The collecting component 3 is driven to rotate by a rotating drive device (not shown in the diagram). During rotation, it gradually wraps the guided waste edges around its surface, achieving waste edge collection. The torsion roller 4 is connected to the guide groove 101 via the first slider 5. The shape of the first slider 5 is adapted to the guide groove 101, allowing it to slide tightly within the guide groove 101. The first slider 5 is rotatably mounted on the torsion roller 4, so that the torsion roller 4 can also rotate freely while sliding along the guide groove 101 with the first slider 5. After being cut off by the cutter 2, the waste edge is guided by the torsion roller 4, changing its direction of movement, and then wound onto the collecting component 3. The surface of the torsion roller 4 is smooth, which reduces friction when in contact with the waste edge, avoiding damage to the waste edge, while ensuring that the waste edge can be smoothly guided along its surface to the collecting component 3.

[0039] The specific working process is as follows: the lithium battery separator is conveyed at a stable speed along a preset conveying path by the conveying device on the machine body 1. When the separator is conveyed to the position of the cutter 2, the cutter 2 rotates at high speed under the drive of the power device, cutting off the excess part of the separator edge to form a waste edge. At this time, the waste edge separates from the separator body and begins to enter the collection process. The cut waste edge first contacts the torsion roller 4. Since the torsion roller 4 is slidably set in the guide groove 101 at a certain angle with the separator conveying direction through the first slider 5, the waste edge will be guided by the torsion roller 4 when it contacts the torsion roller 4, and its movement direction will change. Combined with the angle setting of the guide groove 101, the waste edge will have a certain offset in the horizontal direction, preparing for the subsequent winding. After being guided by the torsion roller 4, the waste edge is guided to the collecting unit 3. The collecting unit 3 rotates continuously under the drive of the drive device, gradually winding the guided waste edge around its own surface. As the collecting unit 3 rotates, the waste edge is continuously collected, realizing the winding and collection process of the waste edge. During this process, the torsion roller 4 automatically adjusts its position within the guide groove 101 via the first slider 5 based on changes in the waste edge width and feedback from the winding tension. This ensures that the waste edge is always accurately guided to the collecting component 3 and maintains stable tension of the waste edge during winding. As the lithium battery separator is continuously conveyed, the cutter 2 continuously cuts out the waste edge, the torsion roller 4 continuously guides it, and the collecting component 3 continuously winds and collects the waste edge. The entire device works in a cyclical manner until the cutting task of the lithium battery separator is completed.

[0040] In summary, due to the tolerance in the width of the waste edge after cutting the lithium battery separator, traditional constant-speed winding methods are prone to fluctuations in winding tension. However, in this device, when the waste edge width changes, the lateral force exerted by the waste edge on the torsion roller 4 changes accordingly. The torsion roller 4 slides within the guide groove 101 via the first slider 5, automatically adjusting its position based on changes in lateral force. For example, when the waste edge width increases, the lateral force exerted by the waste edge on the torsion roller 4 per unit time increases, causing the torsion roller 4 to slide in the corresponding direction within the guide groove 101, changing the waste edge guiding angle. This adjusts the winding position and tension of the waste edge on the collecting element 3, ensuring that the winding tension remains within a suitable range, preventing separator tearing due to excessive tension or waste edge detachment due to slack tension. Stable winding tension ensures the quality of waste edge winding, avoids damage to the lithium battery separator caused by tension issues, thereby improving the overall quality of the lithium battery separator product and providing reliable raw materials for subsequent battery assembly processes. The guide chute 101 is set at an angle to the lithium battery separator conveying direction, and the torsion roller 4 provides guidance, allowing the waste edges to be guided to the collection unit 3 along a preset path after being cut. This guiding mechanism avoids disorderly entanglement of the waste edges during the winding process, ensuring the tightness and neatness of the winding structure, which is beneficial to improving the collection efficiency of the collection unit 3 for waste edges and reducing waste during the collection process.

[0041] In some examples, the rotation axis of the torsion roller 4 is tilted relative to the vertical direction, altering the movement path of the waste edge on its surface. Compared to a vertically positioned rotation axis, this tilted configuration allows the waste edge to better adapt to varying widths during the guiding process. Through a specific motion trajectory, the position of the waste edge on the torsion roller 4 can be more precisely adjusted, leading to more accurate guidance to the collection element 3 and further improving the accuracy of waste edge guidance. The tilted rotation axis makes the movement of the waste edge on the surface of the torsion roller 4 more complex, which helps to dynamically adjust the tension of the waste edge during winding. When the waste edge width increases or decreases, the change in waste edge movement caused by the tilted rotation axis can be promptly fed back to the winding tension. For example, when the waste edge width increases, under the special guiding action of the torsion roller 4, the winding speed and position of the waste edge on the collection element 3 will be adjusted accordingly, thus preventing excessive winding tension; conversely, when the waste edge width decreases, similar dynamic adjustments can prevent slack winding tension. This dynamic adjustment mechanism further enhances the stability of the winding tension, ensuring the cutting quality of the lithium battery separator.

[0042] In some examples, one end of the first elastic element 6 is connected to the side wall of the guide groove 101, and the other end is connected to the first slider 5. As the first slider 5 slides closer to the cutter 2, the first elastic element 6 is further compressed, and the elastic force it generates also increases. When the elastic force increases to balance the lateral force caused by the change in waste edge width, the first slider 5 stops sliding. At this time, the torsion roller 4 stabilizes in the new position and readjusts the guide path of the waste edge to ensure that the waste edge can still be accurately wound onto the collector 3. If the waste edge width returns to a smaller value, the lateral force of the waste edge on the torsion roller 4 decreases. At this time, the elastic force of the first elastic element 6 is greater than the lateral force, and the first elastic element 6 pushes the first slider 5 to drive the torsion roller 4 to slide away from the cutter 2, returning to or approaching the original position, and continuing to maintain normal waste edge guidance and winding operations. The setting of the first elastic element 6 enables the torsion roller 4 to automatically adjust its position within the guide groove 101 according to the change in waste edge width. This adaptive adjustment function is highly precise, responding in real time to minute changes in waste edge width. It ensures the waste edge is always guided to the collecting unit 3 along the optimal path, avoiding guidance deviations caused by fluctuations in waste edge width and improving the accuracy and stability of waste edge collection. By adjusting the position of the torsion roller 4 in a timely manner, the first elastic element 6 ensures the waste edge is wound more neatly and tightly on the collecting unit 3. Whether the waste edge width increases or decreases, the change in the position of the torsion roller 4 ensures the waste edge is evenly distributed on the collecting unit 3, thereby optimizing the winding effect and reducing subsequent problems caused by uneven winding, such as loose or detached waste edges.

[0043] In some examples, the collection hopper 102 is located on one side of the machine body 1, in the direction of lithium battery separator conveying. Its shape is typically designed as a trough to facilitate the collection and guidance of waste edges. The collection hopper 102 is made of a robust material capable of withstanding the weight of the waste edges and the impact forces that may occur during collection. A vertical groove 103 is formed on the side wall of the collection hopper 102. The inner wall of the vertical groove 103 is smooth, providing a smooth lifting and lowering track for the second slider 7. The shape of the second slider 7 is adapted to the vertical groove 103, allowing it to slide up and down tightly within the groove. A mounting structure is provided on the second slider 7 for mounting the first support roller 8, ensuring that the first support roller 8 moves stably with the second slider 7 during operation. The first support roller 8 is rotatably mounted on the second slider 7, with its rotation axis horizontal. The smooth surface of the first support roller 8 reduces friction with the waste edges, allowing the waste edges to move smoothly on its surface. The first support roller 8 is mounted on the second slider 7 via bearings and other components, ensuring its rotational flexibility and effectively supporting the waste edge after passing through the torsion roller 4. After being guided by the torsion roller 4, the waste edge enters the collection hopper 102. At this point, the first support roller 8, supported by the second slider 7, supports the waste edge. Because the first support roller 8's rotation axis is horizontal and its surface is smooth, the waste edge can slide smoothly on its surface and continue moving towards the collection component 3. During the process of the waste edge winding onto the collection component 3, as the amount of waste edge winding on the collection component 3 increases, the pressure of the waste edge on the first support roller 8 changes. This pressure change causes the second slider 7 to adaptively slide up and down within the vertical groove 103. For example, when the amount of waste edge winding on the collection component 3 gradually increases, the pressure of the waste edge on the first support roller 8 increases, and the second slider 7 slides downward within the vertical groove 103; conversely, when the amount of waste edge winding decreases, the pressure decreases, and the second slider 7 slides upward. The first support roller 8, as the second slider 7 rises and falls, maintains effective support for the waste edge, ensuring that the waste edge can be continuously and stably wound onto the collection unit 3. Throughout the process, the cutter 2 continuously cuts the waste edge, the torsion roller 4 continuously guides, and the collection unit 3 continuously rotates to collect the waste edge. All components work together to complete the task of collecting the waste edge of the lithium battery separator. The first support roller 8 is configured to provide stable support for the waste edge after passing through the torsion roller 4, ensuring that the waste edge will not shift or fall off due to gravity or other factors before entering the collection unit 3. This allows the waste edge to be wound onto the collection unit 3 along a predetermined path, improving the accuracy and stability of waste edge collection. The adaptive rising and falling sliding of the second slider 7 within the vertical chute 103 allows the first support roller 8 to automatically adjust its position according to changes in the amount of waste edge wound on the collection unit 3. This adaptive adjustment function can adapt to the collection needs of waste edges of different widths and weights, further optimizing the waste edge collection path and ensuring the smooth progress of the waste edge collection process.The supporting action of the first support roller 8 allows the waste edges to be distributed more evenly when wound onto the collecting element 3. This helps to avoid problems such as loose or uncoiled winding caused by uneven distribution of waste edges on the collecting element 3, improves the winding quality, and makes the collected waste edges more regular, facilitating subsequent processing.

[0044] In some examples, within the collecting hopper 102, the first support roller 8, the second support roller 9, and the collecting element 3 are arranged sequentially along their length. This layout provides a specific path for the waste edge, allowing it to pass orderly through the bottom of the first support roller 8 and the top of the second support roller 9 after being guided by the torsion roller 4, ultimately winding onto the collecting element 3. This orderly arrangement facilitates the gradual guidance and control of the waste edge, optimizing the winding process. The waste edge continues to move from the bottom of the first support roller 8, transitioning to the top of the second support roller 9. The second support roller 9 further guides the waste edge's path, adjusting its angle and tension through rotation and positioning, allowing it to approach the collecting element 3 in a more suitable state. During this process, the parallel rotation axes of the first and second support rollers 8 and 9 ensure the smoothness of the waste edge during the transition. The waste edge passing the top of the second support roller 9 is finally guided onto the collecting element 3 for winding. As the collecting element 3 continues to rotate, the waste edge continuously wraps around its surface. Throughout the process, the second slider 7 adaptively slides up and down within the vertical chute 103 according to the pressure changes of the waste edge on the first support roller 8, maintaining stable conveying and appropriate tension of the waste edge. The second support roller 9 provides a smooth transition for the waste edge from the first support roller 8 to the collection unit 3. The parallel rotating shafts of the two support rollers ensure that the waste edge will not jump or twist due to uneven force during the transition, ensuring that the waste edge can enter the collection unit 3 in a stable state for winding, thus improving the smoothness of waste edge conveying. The first support roller 8 and the second support roller 9 support and guide the waste edge at different stages, which helps to more precisely control the tension of the waste edge during the winding process. During the transition of the waste edge from the first support roller 8 to the second support roller 9 and then to the collection unit 3, the synergistic action of the two support rollers can adjust the tension of the waste edge in real time, keeping it uniform and avoiding problems such as loose or unwound waste edge due to uneven tension, thereby improving the winding quality.

[0045] In some examples, if the weight of the waste edge on the collecting element 3 increases, the pressure on the first support roller 8 increases, and the second slider 7 will slide downward within the vertical groove 103, overcoming part of the elastic force of the second elastic element 10. The second elastic element 10 is further compressed or stretched, and its elastic force increases accordingly. When the elastic force and the pressure of the waste edge on the first support roller 8 reach a new equilibrium, the second slider 7 stops sliding down, and the first support roller 8 stabilizes in the new position, continuing to support the waste edge. When the waste edge on the collecting element 3 decreases, and the pressure on the first support roller 8 decreases, the elastic force of the second elastic element 10 is greater than the waste edge pressure, pushing the second slider 7 to slide upward. The first support roller 8 then rises, maintaining a suitable support position and tension for the waste edge, ensuring the continuity and stability of the waste edge collection process. The second elastic element 10 allows the first support roller 8 to adjust its position in real time according to changes in the weight of the waste edge, thereby dynamically adjusting the tension of the waste edge. In the initial stage of waste edge collection, the waste edge is relatively light, and the downward force provided by the second elastic element 10 keeps the first support roller 8 in a suitable position, giving the waste edge appropriate initial tension. As the amount of waste edge collected increases, the first support roller 8 slides down to prevent the waste edge from breaking due to excessive tension. This dynamic adjustment mechanism effectively avoids the problem of waste edge tangling caused by uneven tension, ensuring winding quality.

[0046] In some examples, the third support roller 11 is located between the second support roller 9 and the cutter 2. This position is based on a comprehensive consideration of the waste edge movement path and tension control. It is positioned on the path where the torsion roller 4 guides the waste edge towards the collection hopper 102, enabling timely reception and tensioning of the waste edge output from the torsion roller 4. This provides stable starting conditions for the subsequent winding process of the waste edge through the second support roller 9 and the collection component 3. After being tensioned by the third support roller 11, the waste edge continues to move towards the second support roller 9. The second support roller 9 receives the tensioned waste edge and further guides it to the collection component 3 for winding and collection. Throughout the process, the first support roller 8, through the adaptive adjustment of the second slider 7 within the vertical groove 103, works in conjunction with the second support roller 9 and the collection component 3 to ensure that the waste edge can be wound smoothly and stably. The vertical orientation of the rotation axis of the third support roller 11 provides precise tension control for the waste edge. Compared to horizontally oriented support rollers, vertically rotating shafts can apply a more uniform tension to the waste edge in the vertical direction as it passes over the roller body, resulting in more consistent tension along the length of the waste edge. This precise tensioning helps solve winding problems caused by uneven local tension on the waste edge, such as wrinkles and twists, ensuring the flatness and stability of the waste edge during subsequent conveying and winding processes.

[0047] In some examples, the recess 401 of the torsion roller 4 provides a clear guide path for the waste edge, making it less likely to deviate from the predetermined trajectory during the guiding process. This is crucial for ensuring that the waste edge is accurately conveyed to the subsequent support rollers and collector 3, greatly improving the accuracy of waste edge guidance, reducing waste edge entanglement problems caused by guidance deviations, and ensuring the normal operation of the cutting device. The cooperation of the recesses 401 of the first support roller 8 and the second support roller 9 makes the transition of the waste edge between the support rollers smoother. The waste edge can move smoothly from one recess to another, avoiding problems such as jumping and offset during the transition, further optimizing the waste edge conveying path, and improving the stability and reliability of the entire waste edge collection system. The recess 401 of the third support roller 11 ensures that the waste edge fits tightly against the roller body during the tensioning process, concentrating and evenly distributing the tension force. This allows the waste edge to withstand more uniform tension during tensioning, avoiding waste edge breakage or deformation caused by excessive local stress, thereby enhancing the stability of waste edge tensioning and improving the winding quality.

[0048] In some examples, by connecting the drive shaft on the machine body 1 that drives the lithium battery separator to the collection unit 3, the rotation speed of the collection unit 3 is closely related to and precisely matched with the conveying speed of the lithium battery separator. Regardless of how the conveying speed of the lithium battery separator changes due to production needs, the collection unit 3 can synchronously adjust its rotation speed, ensuring that the waste edges cut out per unit time are collected in a timely manner. This avoids the problem of waste edge accumulation or untimely collection caused by speed mismatch, thus ensuring the continuity and stability of the cutting work.

[0049] In some examples, the bottom wall of the hopper 102 near the cutter 2 has a chip outlet 201. The shape of the chip outlet 201 is usually designed to be rectangular or circular, and its size is determined according to the size of the device and the amount of chips that may be generated, ensuring effective chip discharge without excessively affecting the structural strength of the hopper 102. The edges of the chip outlet 201 are smoothed to prevent damage to the chips or the hopper 102 during chip discharge. The blower 12 is mounted on the bottom wall outside the chip outlet 201 and is tightly connected to the bottom wall of the hopper 102 by bolts or other fastening methods. The outlet of the blower 12 faces away from the hopper 102 to ensure that the sucked-out chips can be effectively discharged to the designated location. The power of the blower 12 is selected according to the volume of the hopper 102, the size of the chip outlet 201, and the expected chip suction efficiency to ensure that sufficient suction is generated to suck out various types of chips from inside the hopper 102. The blower 12 continuously sucks out debris from the collection hopper 102 through the debris outlet 201, effectively preventing debris from accumulating at the bottom of the collection hopper 102. Excessive debris accumulation may affect the normal conveying and collection of waste edges within the collection hopper 102, and may even cause the waste edges to become entangled and difficult to move. Timely removal of debris can avoid these problems and ensure the stable operation of waste edge collection. Keeping the inside of the collection hopper 102 clean helps optimize its performance. A clean collection hopper 102 can better guide the direction of the waste edges, making their movement within the collection hopper 102 smoother, reducing waste edge deviation or jamming caused by debris interference, and improving the collection efficiency of the collection hopper 102 for waste edges. If the debris in the collection hopper 102 is not cleaned in time, it may rub against components such as the torsion roller 4, support roller, and collection component 3 during the movement of the waste edges, accelerating the wear of these components. By sucking out the debris by the fan 12, the contact between the debris and these components is reduced, thereby reducing the wear of the components, extending the service life of the components, and improving the stability of the entire cutting device.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A lithium battery separator slitting apparatus for slitting off the scrap of a lithium battery separator, characterized by, Include: Machine body (1), the lithium battery diaphragm is used for circulating delivery and is arranged on the machine body (1); The cutter (2) is rotatably arranged on the machine body (1) and is used for cutting the waste edge; The material collecting member (3) is rotatably arranged on the machine body (1) and is located on one side of the cutter (2), and the material collecting member (3) is used for winding and collecting the waste edge after rotation; The machine body (1) has a guide chute (101), and the length direction of the guide chute (101) is arranged at an angle with the horizontal direction of the conveying direction of the lithium battery diaphragm, and the angle range of the angle is 0~90°; The torsion roller (4) is slidably and relatively rotatably arranged in the guide chute (101) through the first sliding block (5), and the waste edge is used to wind on the waste edge after being guided by the torsion roller (4).

2. The lithium battery separator slitting device of claim 1, wherein, The rotation axis of the torsion roller (4) is arranged at an angle with respect to the vertical direction.

3. The lithium battery separator slitting device of claim 1, wherein, The lithium battery diaphragm cutting device further comprises: The first elastic member (6) acts on one side wall of the guide chute (101) at one end and acts on the first sliding block (5) at the other end, and is used to provide the force for the first sliding block (5) to drive the torsion roller (4) to slide away from the cutter (2).

4. The lithium battery separator slitting device of claim 1, wherein, One side of the machine body (1) has a material collecting hopper (102), and the material collecting hopper (102) is located on one side of the conveying direction of the lithium battery diaphragm, and the material collecting member (3) is rotatably arranged in the material collecting hopper (102), and a vertical sliding groove (103) is formed in the side wall of the material collecting hopper (102), and further comprising: The second sliding block (7) is slidably arranged in the vertical sliding groove (103); The first supporting roller (8) is rotatably arranged on the second sliding block (7), and the rotation axis of the first supporting roller (8) is along the horizontal direction, and the first supporting roller (8) is used to support the waste edge after passing through the torsion roller (4).

5. The lithium battery separator slitting device of claim 4, wherein, The lithium battery diaphragm cutting device further comprises: The second supporting roller (9) is rotatably arranged on the inner wall of the material collecting hopper (102), and the rotation axes of the first supporting roller (8) and the second supporting roller (9) are parallel, and the first supporting roller (8), the second supporting roller (9) and the material collecting member (3) are arranged in the length direction of the material collecting hopper (102) in sequence, and the waste edge is used to wind on the material collecting member (3) after passing through the bottom of the first supporting roller (8) and the top of the second supporting roller (9) in sequence after being guided by the torsion roller (4).

6. The lithium battery separator slitting device of claim 4, wherein, The lithium battery diaphragm cutting device further comprises a second elastic member (10), one end of the second elastic member (10) acts on the bottom wall of the vertical sliding groove (103), and the other end acts on the second sliding block (7), and provides the force for the second sliding block (7) to slide downward.

7. The lithium battery separator slitting device of claim 5, wherein, Further comprising: A third supporting roller (11) is rotatably arranged on the machine body (1), the rotation axis of the third supporting roller (11) is vertical, and the third supporting roller (11) is located between the second supporting roller (9) and the cutting knife (2) and used for supporting the scrap edge between the twisting roller (4) and the third supporting roller (11).

8. The lithium battery separator slitting device of claim 7, wherein, The middle sections of the twisting roller (4), the first supporting roller (8), the second supporting roller (9) and the third supporting roller (11) are all provided with recesses (401).

9. The lithium battery separator slitting device of claim 1, wherein, A transmission shaft for driving the lithium battery diaphragm conveying is in transmission connection with the material collecting member (3) on the machine body (1).

10. The lithium battery separator slitting device of claim 4, wherein, The bottom wall of the material collecting hopper (102) near one end of the cutting knife (2) is provided with a chip outlet (201), and a fan (12) is arranged on the bottom wall outside the chip outlet (201) and used for sucking out the chips from the inside of the material collecting hopper (102) through the chip outlet (201).

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