Film tearing device, control method and composite pole piece preparation system
Through the adjustable misalignment amount and dynamic tension control of the film tearing device, the problems of low quality and efficiency of the composite electrode sheet tearing film are solved, and efficient and low damage are achieved.
Patent Information
- Application Number
- CN202510716720.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2025-08-19
AI Technical Summary
The prior art is difficult to meet the film tearing needs of composite electrode sheets of different materials, resulting in low quality and efficiency of tearing films. In particular, low-ductility materials break due to excessive angles, and high-ductility materials accumulate wrinkles due to excessive angles.
A film tearing device is provided, including a film tearing roller assembly, a guide roller assembly and a temperature control mechanism. The film tearing roller with adjustable misalignment amount is achieved in step or synchronously, combining dynamic tension control and negative pressure cleaning to adapt to different materials and process needs.
It improves the film tearing efficiency, reduces the time of changing and adjusting machines, ensures the flatness of the film peeling, reduces the risk of damage and residue, and ensures the quality and continuous production of composite electrode sheets.
Smart Images
Figure CN120511264A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of new energy technology, and in particular to a film tearing device, a control method and a composite electrode preparation system. Background Art
[0002] With the development of new energy technologies, solid-state batteries are becoming the focus of the industry with their higher energy density, better safety and longer cycle life, and are regarded as the core development direction of the next generation of battery technology.
[0003] In the related art, during the transfer process of the composite electrode, since the substrates and diaphragms of the composite electrode made of different materials have different ductility, some low-ductility materials may suffer brittle fracture due to excessively large tearing angles, and some high-ductility materials may accumulate wrinkles due to relaxation due to excessively small tearing angles. Therefore, the devices of the related art are difficult to meet the requirements of different materials and processes, resulting in low tearing quality and efficiency. Summary of the Invention
[0004] In order to solve or partially solve the problems existing in the related technology, the present application provides a film tearing device, a control method and a composite electrode preparation system, which can realize flexible switching between step-by-step film tearing or synchronous film tearing, adapt to different materials and process requirements, and improve the film tearing efficiency and tearing quality in the composite electrode preparation process.
[0005] A first aspect of the present application provides a film tearing device, which is used to tear off a film material on the surface of a composite electrode. The film tearing device at least includes a film tearing roller assembly, a first guide roller assembly, and a second guide roller assembly. Among them, the film tearing roller assembly is used to contact the predetermined positions on both sides of the composite electrode, so that the film materials on both sides of the composite electrode are torn off step by step or synchronously; the first guide roller assembly and the second guide roller assembly are arranged on the output side of the film tearing roller assembly, the first guide roller assembly is used to guide the composite electrode after film tearing to be transmitted along the first path, the second guide roller assembly is used to guide the torn film material to be transmitted along the second path, the second guide roller assembly is used to guide the torn film material to be transmitted along the second path, and the second guide roller assembly is used to adjust the displacement so that the film material enters the film material winding station at a set angle on the second path.
[0006] In one embodiment, it also includes a first temperature control mechanism and a first cooling roller; the first cooling roller is in surface contact with the composite electrode; the first temperature control mechanism is used to obtain the temperature information of the composite electrode before tearing the film, and control the cooling temperature of the first cooling roller based on the temperature information, so that the composite electrode has a predetermined temperature difference after cooling and before cooling.
[0007] In one embodiment, the film-tearing roller assembly includes a first film-tearing roller and a second film-tearing roller, wherein the first film-tearing roller and the second film-tearing roller are used to transmit the composite electrode piece to be peeled, and the first film-tearing roller and the second film-tearing roller are used to contact different or the same positions on both sides of the composite electrode piece; Among them, the first film-tearing roller is fixedly arranged, and the second film-tearing roller is movably arranged in the transmission direction of the composite electrode sheet. When the second film-tearing roller moves to be aligned with the first film-tearing roller, it is used to synchronously tear off the film materials on both sides of the composite electrode sheet; when the second film-tearing roller moves to be misaligned with the first film-tearing roller, it is used to tear off the film materials on both sides of the composite electrode sheet in steps.
[0008] In one embodiment, the second guide roller assembly includes a bracket and a guide roller installed on the bracket, and the bracket is provided with a position adjustment assembly for installing the guide roller. The position adjustment assembly is used to adjust the lateral and / or longitudinal displacement of the guide roller so that the film material forms a set film tearing angle.
[0009] In one embodiment, a film winding mechanism is provided downstream of the second guide roller assembly, and is used to wind the torn strip film into a roll; wherein, the film winding mechanism is equipped with a torque component, and the torque component is used to enable the film winding mechanism to wind the torn film within a preset torque range, and dynamically adjust the winding speed based on real-time tension detection.
[0010] In one embodiment, the torque component has a set torque parameter range of 100-150N; When the tension of the film material exceeds the torque parameter range, the winding speed decreases; when the tension of the film material is less than the torque parameter range, the winding speed increases.
[0011] In one embodiment, the invention further comprises: a tension control component, which is arranged downstream of the first guide roller component, and the tension control component is used to control the transmission tension of the composite electrode after the film is torn; and / or, A tape splicing platform is provided with a clamping device and a tape splicing operation unit, wherein the clamping device is used to fix the opposite ends of the film material to be connected, and the tape splicing operation unit is used to perform a connection operation on the two ends of the film material; and / or, A deviation correction mechanism, used to adjust the lateral displacement of the film material during transmission, so that the film material is transmitted to the film material winding mechanism along a predetermined trajectory; and / or, A first cleaning assembly includes a negative pressure generating mechanism and a dust collecting member connected to the negative pressure generating mechanism via a pipe, wherein the dust collecting member is placed at the film separation portion of the composite electrode to absorb impurities generated after the film is torn off; and / or The second cleaning component includes a brush component, which is used to contact the surface of the composite electrode after the film is torn off to remove impurities attached to the surface of the composite electrode.
[0012] A second aspect of the present application provides a composite electrode preparation system, comprising the film tearing device as described in the first aspect above.
[0013] A third aspect of the present application provides a film tearing control method of the film tearing device as described in the first aspect, comprising: Controlling the temperature control device to perform a first cooling process on the rolled composite electrode piece so that a predetermined temperature difference is generated between the composite electrode piece after cooling and before cooling; When the second tearing roller moves to the position aligned with the first tearing roller, the film materials on both sides of the composite electrode are torn off synchronously; when the second tearing roller is misaligned, the film materials on both sides are torn off step by step; The position adjustment component of the second guide roller assembly is used to adjust the lateral and / or longitudinal displacement of the guide roller so that the film material forms a set film tearing angle; The torn film material is reeled in within the preset torque range. When the tension exceeds the threshold, the reeling speed is reduced. When the tension is insufficient, the reeling speed is increased to form a closed-loop control.
[0014] In one embodiment, when the second tearing roller moves to align with the first tearing roller, the film materials on both sides of the composite electrode are torn off synchronously; when the second tearing roller is misaligned, the film materials on both sides are torn off step by step, including: Drive the second tearing roller to move to the offset position along the transmission direction of the composite electrode, so that the first tearing roller preferentially contacts the film material on one side to achieve step-by-step tearing; or drive the second tearing roller to move to the alignment position along the transmission direction of the composite electrode, so that the first tearing roller and the second tearing roller simultaneously contact the side film materials on both sides of the composite electrode to achieve synchronous tearing.
[0015] The technical solution provided by this application may include the following beneficial results: This application uses displacement adjustment to allow the film to enter the film winding station at a set angle along the second path, making it compatible with the tearing and recycling of different base film materials, reducing changeover time and improving film tearing efficiency. Furthermore, the adjustable offset of the tearing rollers allows for flexible switching between step-by-step and simultaneous tearing to accommodate different material and process requirements.
[0016] The technical solution of this application, with adjustable film tearing angle and real-time tension closed-loop control, ensures the smoothness of film peeling, effectively reduces the risk of breakage and residue, and combined with negative pressure cleaning, can further eliminate impurity contamination and ensure the surface quality of the composite electrode, thereby achieving high-precision, low-damage continuous production.
[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.
[0019] Figure 1 Schematic diagram of the structure of the film tearing device shown in the embodiment of the present application; Figure 2 1 is a structural schematic diagram of a film tearing device according to another embodiment of the present application; Figure 3 1 is a schematic diagram of the coordination of the film-tearing roller assembly, the first guide roller assembly, and the second guide roller assembly of the film-tearing device shown in an embodiment of the present application; Figure 4 It is a flow chart of the control method of the film tearing device shown in the embodiment of the present application.
[0020] Figure numerals: 100, film-tearing device; 101, composite electrode; 102, base film; 1021, passing roller; 110, first temperature control mechanism; 111, first cooling roller; 120, film-tearing mechanism; 121, film-tearing roller assembly; 121a, first film-tearing roller; 121b, second film-tearing roller; 1211, first driving mechanism; 124, first guide roller assembly; 1241, brush mechanism; 122, second guide roller assembly; 1221, second driving mechanism; 123, first cleaning assembly; 125, tape splicing platform; 126, deviation correction mechanism; 127, film winding mechanism; 128, tension control assembly; 129, second cooling roller; 1291, thickness gauge. DETAILED DESCRIPTION
[0021] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0022] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0023] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", 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 this application and simplifying the description, and do not indicate or imply 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 this application.
[0024] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0025] In the related art, during the transfer process of the composite electrode, since the substrates and diaphragms of the composite electrode of different materials have different ductility, some low-ductility materials may suffer brittle fracture due to excessively large tearing angles, and some high-ductility materials may cause accumulation of wrinkles due to relaxation due to excessively small tearing angles. Therefore, the devices of the related art are difficult to meet the requirements of different materials and processes, resulting in low tearing quality and efficiency. In response to the above problems, the embodiment of the present application provides a tearing device that is compatible with the tearing and recycling of base films of different materials, reduces the time for changing models and adjusting machines, and is conducive to improving the tearing efficiency. At the same time, the tearing rollers with adjustable offset can realize flexible switching between step-by-step tearing and synchronous tearing to adapt to the requirements of different materials and processes.
[0026] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0027] Figure 1 It is a structural schematic diagram of the film tearing device shown in an embodiment of the present application.
[0028] See also Figure 1 The present application provides a film-tearing device 100, which is used to tear off the film material on the surface of the composite electrode sheet 101. The film-tearing device 100 includes a film-tearing mechanism 120, which includes a film-tearing roller assembly 121, a first guide roller assembly 124, and a second guide roller assembly 122. The film-tearing roller assembly 121 is used to contact predetermined positions on both sides of the composite electrode sheet 101, so that the film material on both sides of the composite electrode sheet 101 is torn off step by step or synchronously; the first guide roller assembly 124 and the second guide roller assembly 122 are arranged on the output side of the film-tearing roller assembly 121, the first guide roller assembly 124 is used to guide the composite electrode sheet 101 after film-tearing to be transported along the first path, the second guide roller assembly 122 is used to guide the torn film material to be transported along the second path, and the second guide roller assembly 122 is used to guide the torn film material to be transported along the second path, and the second guide roller assembly 122 is used to adjust the displacement so that the film material enters the film winding station at a set angle on the second path.
[0029] In the related art, since the base materials and diaphragms of composite pole pieces made of different materials have different ductility, some low-ductility materials may suffer brittle fracture due to excessively large tearing angles, and some high-ductility materials may accumulate wrinkles due to relaxation due to excessively small tearing angles. This application uses displacement adjustment to allow the film material to enter the film material winding station at a set angle in the second path, which is compatible with the tearing and recycling of base films made of different materials, reduces the time for changing models and adjusting machines, and helps improve the tearing efficiency. At the same time, the tearing rollers with adjustable offset can achieve flexible switching between step-by-step tearing and synchronous tearing to adapt to different material and process requirements.
[0030] In some embodiments, the film tearing device 100 also includes a first temperature control mechanism 110 and a first cooling roller 111, and the first cooling roller 111 is in surface contact with the composite electrode 101; the first temperature control mechanism 110 is used to obtain the temperature information of the composite electrode 101 before tearing the film, and control the cooling temperature of the first cooling roller 111 based on the temperature information.
[0031] Specifically, the first temperature control mechanism 110 may include a temperature detector and an oil cooler, the oil cooler being fluidically connected to the first cooling roller 111. The temperature detector may be, for example, an infrared temperature sensor, for detecting the temperature of the cooled composite electrode piece 101. After the first temperature control mechanism 110 cools the rolled composite electrode piece 101, a predetermined temperature difference is generated between the composite electrode piece 101 before and after cooling. This allows for precise control of the cooling temperature difference of the composite electrode piece 101 before and after film tearing, thereby generating a thermal stress difference at the interface between the substrate of the composite electrode piece 101 and the film material, thereby reducing the tear strength of the film material and improving the tearing quality of the composite electrode piece 101.
[0032] Two first cooling rollers 111 can be provided, and the two first cooling rollers 111 are in contact with the two surfaces of the composite electrode 101 respectively. The surface temperature of the first cooling roller 111 is adjusted to a set range by the control module of the oil cooler. When the first cooling roller 111 rotates, it has a set contact time with the high-temperature composite electrode 101 in transmission. During the contact time, the surface temperature of the electrode is reduced to a set value through the heat transfer effect, so that a set temperature difference is formed between the set value and the temperature before cooling. The set value or temperature difference matches the material properties of the composite electrode 101 or the preparation process of the composite electrode, and can be freely set according to the material properties and preparation process of the composite electrode.
[0033] See also Figure 3 In some embodiments, the film-tearing roller assembly 121 includes a first film-tearing roller 121a and a second film-tearing roller 121b. The first film-tearing roller 121a and the second film-tearing roller 121b are used to transmit the composite electrode 101 to be torn off. The first film-tearing roller 121a and the second film-tearing roller 121b are used to contact different or the same positions on both sides of the composite electrode 101.
[0034] The first tearing roller 121a and the second tearing roller 121b are arranged at different heights in the longitudinal direction, and one or both of them are driven by the first driving mechanism 1211 to achieve front-to-back offset adjustment. In this embodiment, the first tearing roller 121a is fixed, and the second tearing roller 121b is movable in the transmission direction of the composite electrode sheet 101. When the second tearing roller 121b moves to align with the first tearing roller 121a, it is used to synchronously tear off the film materials on both sides of the composite electrode sheet 101; when the second tearing roller 121b moves to offset from the first tearing roller 121a, it is used to tear off the film materials on both sides of the composite electrode sheet 101 in steps.
[0035] In this embodiment, when the second tearing roller 121b is on the left and the first tearing roller is on the right, the base film on the lower side of the composite pole piece 101 is torn before the base film 102 on the upper side; when the second tearing roller 121b is on the right and the first tearing roller 121a above is on the left, the base film 102 on the upper side of the composite pole piece 101 is torn before the base film 102 on the lower side; when the second tearing roller below and the first tearing roller above are aligned in the thickness direction of the composite pole piece 101, the diaphragms on the upper and lower sides of the composite pole piece 101 are torn synchronously.
[0036] In the solution of the present application, in addition to realizing the synchronous tearing or step-by-step tearing of the diaphragm on both sides of the composite electrode 101, the tearing roller assembly 121 can also realize the adjustment of the tearing angle by adjusting the positioning relationship between the first tearing roller 121a and the second tearing roller 121b. For example, if the tearing angle needs to be increased, the displacement of the first tearing roller or the second tearing roller can be adjusted to the downstream side. If the tearing angle needs to be reduced, the displacement of the first tearing roller or the second tearing roller can be adjusted to the upstream side.
[0037] In some embodiments, the second guide roller assembly 122 includes a bracket and a guide roller installed on the bracket. The bracket is provided with a second driving mechanism 1221 for installing the guide roller. The second driving mechanism 1221 is used to adjust the lateral and / or longitudinal displacement of the guide roller so that the film material forms a set film tearing angle.
[0038] In this embodiment, the first guide roller assembly 124 and the second guide roller assembly 122 cooperate with each other to more flexibly adjust the film tearing angle of the composite electrode 101. In addition to adjusting the film tearing angle, the second guide roller assembly 122 also has the function of guiding the torn diaphragm into the winding station, thereby optimizing the winding path and equipment layout and improving space utilization.
[0039] Because the composite electrode 101 substrate and diaphragm have different ductility, some low-ductility materials may experience brittle fracture due to excessively large tearing angles, while some high-ductility materials may experience accumulation and wrinkling due to relaxation due to excessively small tearing angles. The solution of this application, by dynamically adjusting the tearing angle, is compatible with the tearing and recycling of diaphragms of different materials, reducing the time required for changeovers and machine adjustments, and improving tearing efficiency.
[0040] In some embodiments, a splicing platform 125, a deviation correction mechanism, and a film winding mechanism are further included between the second guide roller assembly 122 and the winding mechanism. The splicing platform 125 is equipped with a clamping device and a splicing operation unit. The clamping device is used to secure the opposing ends of the film to be connected, and the splicing operation unit is used to perform the splicing operation on the two ends of the film. For example, the operator can precisely align the fracture ends and complete the splicing operation in the splicing operation unit. If the diaphragm breaks during the winding process due to abnormal tension, material defects, or other reasons, the operator can quickly reconnect the broken diaphragm using the splicing platform 125, avoiding downtime or waste accumulation and ensuring the continuity and stability of the diaphragm recycling process.
[0041] In some embodiments, a correction mechanism 126 is further provided. The correction mechanism 126 is arranged downstream of the tape splicing platform 125 and is used to adjust the lateral displacement of the base film 102 during transmission, so that the base film 102 is transmitted along a predetermined trajectory to the film material winding mechanism 127. That is, the tape splicing platform 125 can adjust the tape running position of the diaphragm so that the diaphragm re-enters the normal winding path, thereby ensuring the continuity of the diaphragm recovery.
[0042] The film material winding mechanism 127 is arranged downstream of the second guide roller assembly 122, and is used to wind the torn strip film material into a roll; wherein, the film material winding mechanism is equipped with a torque component, and the torque component is used to enable the film material winding mechanism to wind the torn film material within a preset torque range, and dynamically adjust the winding speed based on real-time tension detection. Specifically, the film material winding mechanism may include a winding spindle, a torque motor and a tension sensing module. The winding spindle is used to wind the diaphragm. The torque motor can be a permanent magnet synchronous motor, and the rated torque parameter range is set to 100-150N according to the material properties of the diaphragm. A tension detector is installed at the entrance of the winding station. When the real-time tension exceeds 100-150N, the winding motor is controlled to slow down and the winding is slowed down; when the real-time tension is lower than 100-150N, the winding motor is controlled to slow down and speed up, and the winding is accelerated. With this setting, the tension fluctuation of the diaphragm can be reduced during the winding process, so that the winding spindle can be wound under a constant tension, reducing the phenomenon of piling or tape breakage caused by tension fluctuation during the winding process.
[0043] In some embodiments, the film tearing device 100 also includes a first cleaning component 123, which includes a negative pressure generating mechanism and a dust collecting component connected to the negative pressure generating mechanism through a pipe. The dust collecting component is placed at the film material separation point of the composite electrode 101 to absorb impurities generated after the film material is torn off.
[0044] The negative pressure generating mechanism may include a variable frequency centrifugal fan, and the dust collecting piece adopts an adjustable angle strip suction port. The width of the suction port is set to match the width of the composite pole piece 101. For example, it can be equal to the width of the composite pole piece 101. The suction port is toward the separation point between the diaphragm and the substrate. When the membrane material is torn off from the composite pole piece 101, the variable frequency centrifugal fan is started to form a high-speed negative pressure airflow at the dust collecting piece. The dust and debris generated by the tearing are sucked into the dust collecting piece and enter the cyclone separator through the pipeline to realize gas-solid separation, and finally the impurities enter the recovery device.
[0045] See also Figure 2 In some embodiments, a brush mechanism 1241 is further included downstream of the first guide roller assembly 124. The brush component of the brush mechanism 1241 is used to contact the surface of the composite electrode after the film is torn to remove dust, powder and other impurities attached to the surface of the composite electrode.
[0046] In some embodiments, it further includes a tension control component, a second temperature control mechanism and a second cooling roller 129 located downstream of the brush mechanism 1241. The second cooling roller 129 contacts the surface of the composite electrode after the film is torn off. The second temperature control mechanism is used to obtain the temperature information of the composite electrode after the film is torn off, and based on the temperature information, control the second cooling roller to reduce the temperature of the composite electrode to near normal temperature. When the second cooling roller 129 rotates, it has a set contact time with the composite electrode in transmission. During this contact time, the surface temperature of the electrode is reduced to normal temperature through the heat transfer effect, thereby meeting the subsequent detection temperature requirements. It is used to control the tension of the composite electrode before winding at a set value. The tension control component 128 can dynamically adjust the transmission tension of the composite electrode after the film is torn off, thereby improving the detection accuracy of the thickness gauge 129 of the thickness detection module.
[0047] In some embodiments, a detection component is further included, which is arranged downstream of the second cooling roller 129 and is used to detect at least one of the thickness, alignment and defects of the composite electrode after cooling. Specifically, the detection component includes a thickness detection unit, which includes two thickness gauges 1291, which are arranged at intervals and cross-arranged along the transmission direction of the electrode to eliminate vibration errors. The thickness detection information is fed back to the preceding roller press, and the rolling pressure of the electrode and the electrolyte membrane is adjusted by the roller press. The detection component also includes an alignment detection unit, which captures the edge position of the electrode in real time and compares it with the baseline. When the lateral offset is greater than the threshold, the upstream correction mechanism 126 is controlled to complete position compensation. The detection component also includes a defect detection unit, which includes a CCD camera that can identify defects such as uneven coating and pinholes. The defect detection unit is linked to the marking machine to print marking information at the defect position, thereby improving the accuracy of automatic sorting of defective products.
[0048] See also Figure 2 In some embodiments, the composite electrode of the present application has an output of a rolling unit 130, and the rolling unit 130 is arranged upstream of the first cooling component. The rolling unit 130 includes a roller assembly 131, and the roller assembly 131 is used to roll the electrode and the electrolyte membrane. After rolling, the solid electrolyte layer on the electrolyte membrane is transferred to the electrode. The film tearing device is arranged at the output end of the rolling assembly 131, and is used to tear off the base film on the surface of the composite electrode output by the rolling assembly 131. After the film material is torn off by the film tearing device, a composite electrode 101 is formed. The present application also provides a composite electrode preparation system, which includes a film-tearing device as described in the above embodiment. The preparation system also includes an unwinding device, a preheating device, and a rolling device. The film-tearing device of the present application is located downstream of the rolling device and is used to tear off the diaphragm on the surface of the composite electrode 101 after rolling by the rolling device.
[0049] The above describes the film tearing device and composite electrode preparation system of the present application. Accordingly, the present application also provides a film tearing control method of the film tearing device as in the above embodiment.
[0050] Figure 4 It is a flow chart of the control method of the film tearing device shown in the embodiment of the present application.
[0051] Please also see Figure 1 and Figure 4 , the method comprises the following steps: S110, controlling the temperature control device to perform a first cooling process on the rolled composite electrode, so that a predetermined temperature difference is generated between the composite electrode after cooling and before cooling.
[0052] In this step, the rolled composite electrode 101 is cooled for the first time by a temperature control device to ensure that the film material and the electrode substrate generate controllable peeling stress due to the difference in thermal shrinkage, thereby avoiding brittle cracking of the film material due to sudden cooling. At the same time, the temperature difference is used to induce separation between the interface of the film material and the substrate, thereby reducing the film tearing resistance and improving the film tearing efficiency and quality.
[0053] S120, when the second tearing roller moves to align with the first tearing roller, the film materials on both sides of the composite electrode are torn off synchronously; when the second tearing roller is misaligned, the film materials on both sides are torn off step by step.
[0054] In this step, the first film tearing roller and the second film tearing roller are arranged in the vertical direction, and a servo motor can be used to drive the horizontal distance between the first film tearing roller 1021 and the second film tearing roller 1021, so that the first film tearing roller and the second film tearing roller are aligned or misaligned, and synchronous or step-by-step adjustment is achieved through feedback from a displacement sensor.
[0055] S130, adjusting the lateral and / or longitudinal displacement of the guide roller through the position adjustment component of the second guide roller assembly so that the film material forms a set film tearing angle.
[0056] In this step, the guide roller assembly adjusts its height via a screw-slider mechanism, creating a tearing angle of 30°-60° between the film and the electrode. This angle can be optimized through finite element simulation to avoid film residue from being too small or scratches or breakage from being too large.
[0057] S140, rewinding the torn film within a preset torque range, reducing the rewinding speed when the tension exceeds a threshold, and increasing the rewinding speed when the tension is insufficient, thereby forming a closed-loop control.
[0058] In this step, the film tension is detected in real time by a tension sensor. If the detected value deviates from the set threshold, the winding speed is adjusted. Dynamically balancing the tension can prevent the film from being too tight (causing stretching deformation) or too loose (causing wrinkles), ensuring neat winding and stability in subsequent processing.
[0059] The solution provided in this application significantly improves process efficiency and quality through temperature-induced peeling, step-by-step / synchronous film tearing mode switching, and dynamic tension closed-loop control. The initial cooling process utilizes thermal shrinkage differences to reduce film tearing resistance, improving tearing speed and efficiency. The tearing angle is optimized by guide roller displacement, and the winding tension (100-150N·m) is dynamically adjusted by the torque component, reducing film breakage. Through functional modularization and an intelligent feedback mechanism, this application solves the efficiency bottlenecks and film damage issues of traditional processes, achieving high-precision, low-cost continuous film tearing production.
[0060] In some embodiments, when the second tearing roller 121b moves to align with the first tearing roller 121a, the film materials on both sides of the composite electrode 101 are torn off synchronously; when the second tearing roller 121b is misaligned, the film materials on both sides are torn off step by step, including: driving the second tearing roller 121b to move to the misaligned position along the transmission direction of the composite electrode 101, so that the first tearing roller 121a preferentially contacts the film material on one side to achieve step-by-step tearing; or, driving the second tearing roller 121b to move to the aligned position along the transmission direction of the composite electrode 101, so that the first tearing roller 121a and the second tearing roller 121b simultaneously contact the side film materials on both sides of the composite electrode 101 to achieve synchronous tearing.
[0061] In some embodiments, the method further includes: using a first cleaning assembly 123 to cause a vacuum cleaner to perform negative pressure cleaning on impurities generated at the film separation point of the composite electrode 101. The vacuum cleaner (e.g., a negative pressure chamber) of the first cleaning assembly 123 creates a negative pressure at the film separation point, absorbing dust and debris generated during the separation process. This application's solution enables flexible switching between step-by-step and simultaneous film tearing modes, adapting to the needs of different film materials with varying viscosity and reducing electrode deformation caused by stress concentration. Adjustable tearing angles and real-time tension closed-loop control ensure smooth film peeling, effectively reducing the risk of breakage and residue. Combined with negative pressure cleaning, this further eliminates impurity contamination, ensures electrode surface quality, and enables high-precision, low-damage continuous production.
[0062] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the description are not necessarily required for this application. In addition, it is understood that the steps in the method of the embodiment of the present application can be adjusted in sequence, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.
[0063] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.
Claims
1. A film tearing device, characterized in that: The film tearing device is used to tear off the film material on the surface of the composite electrode, and the film tearing device at least includes a film tearing roller assembly, a first guide roller assembly and a second guide roller assembly; Among them, the film tearing roller assembly is used to contact the predetermined positions on both sides of the composite electrode, so that the film materials on both sides of the composite electrode are torn off step by step or synchronously; the first guide roller assembly and the second guide roller assembly are arranged on the output side of the film tearing roller assembly, the first guide roller assembly is used to guide the composite electrode after film tearing to be transmitted along the first path, the second guide roller assembly is used to guide the torn film material to be transmitted along the second path, and the second guide roller assembly is used to adjust the displacement so that the film material enters the film material winding station at a set angle on the second path.
2. The film tearing device according to claim 1, characterized in that: Also includes: A first temperature control mechanism and a first cooling roller; the first cooling roller is in contact with the surface of the composite electrode; The first temperature control mechanism is used to obtain temperature information of the composite electrode before film tearing, and control the cooling temperature of the first cooling roller based on the temperature information, so that a predetermined temperature difference is generated between the composite electrode after cooling and before cooling.
3. The film tearing device according to claim 1, characterized in that: The film-tearing roller assembly includes a first film-tearing roller and a second film-tearing roller, wherein the first film-tearing roller and the second film-tearing roller are used to transmit the composite electrode piece to be torn, and the first film-tearing roller and the second film-tearing roller are used to contact different or the same positions on both sides of the composite electrode piece; Among them, the first film-tearing roller is fixedly arranged, and the second film-tearing roller is movably arranged in the transmission direction of the composite electrode sheet. When the second film-tearing roller moves to be aligned with the first film-tearing roller, it is used to synchronously tear off the film materials on both sides of the composite electrode sheet; when the second film-tearing roller moves to be misaligned with the first film-tearing roller, it is used to tear off the film materials on both sides of the composite electrode sheet in steps.
4. The film tearing device according to claim 1, characterized in that: The second guide roller assembly includes a bracket and a guide roller installed on the bracket. The bracket is provided with a position adjustment assembly for installing the guide roller. The position adjustment assembly is used to adjust the lateral and / or longitudinal displacement of the guide roller so that the film material forms a set film tearing angle.
5. The film tearing device according to claim 1, characterized in that: Also includes: The film material winding mechanism is arranged downstream of the second guide roller assembly, and is used to wind the torn strip film material into a roll; wherein, the film material winding mechanism is equipped with a torque component, and the torque component is used to enable the film material winding mechanism to wind the torn film material within a preset torque range, and dynamically adjust the winding speed based on real-time tension detection.
6. The film tearing device according to claim 5, characterized in that: Also includes: The torque component has a set torque parameter range of 100-150N; When the tension of the film material exceeds the torque parameter range, the winding speed is reduced; When the tension of the film material is less than the torque parameter range, the winding speed increases.
7. The film tearing device according to claim 5, characterized in that: include: a tension control assembly, disposed downstream of the first guide roller assembly, the tension control assembly being used to control the transmission tension of the composite electrode after film tearing; and / or, A tape splicing platform is provided with a clamping device and a tape splicing operation unit, wherein the clamping device is used to fix the opposite ends of the film material to be connected, and the tape splicing operation unit is used to perform a connection operation on the two ends of the film material; and / or, A deviation correction mechanism, used to adjust the lateral displacement of the film material during transmission, so that the film material is transmitted to the film material winding mechanism along a predetermined trajectory; and / or, The first cleaning component includes a negative pressure generating mechanism and a dust collecting member connected to the negative pressure generating mechanism through a pipeline. The dust collecting member is placed at the separation point of the film material of the composite electrode to absorb impurities generated after the film material is torn off. and / or, The second cleaning component includes a brush component, which is used to contact the surface of the composite electrode after the film is torn off to remove impurities attached to the surface of the composite electrode.
8. A composite electrode preparation system, characterized in that: It comprises the film tearing device as described in any one of claims 1-7.
9. A film tearing control method of a film tearing device according to any one of claims 1 to 7, characterized in that: include: Controlling the temperature control device to perform a first cooling process on the rolled composite electrode piece so that a predetermined temperature difference is generated between the composite electrode piece after cooling and before cooling; When the second tearing roller moves to the position aligned with the first tearing roller, the film materials on both sides of the composite electrode are torn off synchronously; when the second tearing roller is misaligned, the film materials on both sides are torn off step by step; The position adjustment component of the second guide roller assembly is used to adjust the lateral and / or longitudinal displacement of the guide roller so that the film material forms a set film tearing angle; The torn film material is reeled in within the preset torque range. When the tension exceeds the threshold, the reeling speed is reduced. When the tension is insufficient, the reeling speed is increased to form a closed-loop control.
10. The method according to claim 9, characterized in that When the second tearing roller moves to align with the first tearing roller, the film materials on both sides of the composite electrode are torn off synchronously; when the second tearing roller is misaligned, the film materials on both sides are torn off step by step, including: Drive the second tearing roller to move to the offset position along the transmission direction of the composite electrode, so that the first tearing roller preferentially contacts the film material on one side to achieve step-by-step tearing; or drive the second tearing roller to move to the alignment position along the transmission direction of the composite electrode, so that the first tearing roller and the second tearing roller simultaneously contact the side film materials on both sides of the composite electrode to achieve synchronous tearing.