Lithium battery isolating membrane processing equipment convenient to adjust and processing method

Abstract

The invention relates to the technical field of lithium battery isolating membranes, in particular to lithium battery isolating membrane processing equipment convenient to adjust and a processing method.The lithium battery isolating membrane processing equipment comprises a processing table, a shaping bin and a cooling bin, a plurality of clamping bases are symmetrically arranged in the shaping bin in the isolating membrane conveying direction, and the clamping bases are installed on the two side walls of the shaping bin correspondingly; two C-shaped pushing plates are arranged in the shaping bin, and the pushing plates are in sliding fit connection with the bottom surface of the shaping bin; according to the lithium battery isolating membrane processing equipment convenient to adjust and the processing method, when the lithium battery isolating membrane processing equipment convenient to adjust is used, by vertically adjusting the distance between the air injection bins and an isolating membrane, accurate control over the coverage area of a hot air flow field is achieved, and the heat energy input intensity of a unit area is improved under the constant heat source temperature; the synchronously implemented splayed deflection design of the adjacent air injection bins enables the axis of the nozzle and the membrane surface to form an adjustable inclination angle, and the heating strength of the isolating membrane is remarkably enhanced by prolonging the residence time of hot air on the membrane surface.

Description

Technical Field

[0001] This invention relates to the field of lithium battery separator technology, specifically to an easily adjustable lithium battery separator processing equipment and processing method. Background Technology

[0002] Lithium-ion battery separators are one of the core components of lithium-ion batteries. Their main functions are to physically isolate the positive and negative electrodes to prevent short circuits, and to achieve selective migration of lithium ions through a controllable pore structure, ensuring the efficient conduct of electrochemical reactions. During the processing of lithium-ion battery separators, in order to ensure the dimensional stability and pore structure integrity of the product, the stretched lithium-ion battery separator is preheated to eliminate local stress gradients. Its function is to eliminate the internal stress generated during the stretching process through a controlled temperature field, suppress the shrinkage or deformation of the film layer caused by temperature changes during subsequent use, and optimize the permeability and uniformity of the microporous structure to meet the long-term stability requirements of electrolyte wetting and ion migration efficiency.

[0003] In existing lithium battery separator production processes, semi-automatic lithium battery separator heat setting equipment has become the preferred choice for many small and medium-sized lithium battery separator manufacturers due to its excellent cost controllability, good production flexibility, and strong adaptability to technological transitions. In the critical process of lithium battery separator heat setting, maintaining thermal stability requires dynamic adjustment of the temperature field and tension parameters. While achieving thermal stability control, this also causes changes in the separator's shrinkage tension. These changes further necessitate real-time compensation of the positions of the transverse and longitudinal clamps to ensure the separator maintains a stable shape and performance during heat setting. However, existing semi-automatic separator heat setting equipment typically relies on manual operation. The manual operation of position compensation and thermal energy adjustment is cumbersome and requires repeated trial and error, resulting in significant adjustment lag. The dynamic adjustment of the temperature field will instantly change the relaxation behavior of the polymer chain segments of the separator, resulting in nonlinear fluctuations in shrinkage tension. Existing technologies require manual step-by-step response, first adjusting the heating parameters, and then manually correcting the compensation amount of the clamping plate based on experience or offline detection data. This time-separated operation process causes a delay in the physical process from temperature change to tension response. The lag in decision-making and execution by human intervention further amplifies the compensation deviation, causing the separator to be subjected to undesigned stress under transition conditions, inducing microporous structure collapse or local thickness deviation. To address this, we propose an easily adjustable lithium battery separator processing equipment and method. Summary of the Invention

[0004] One of the technical problems that this application aims to solve is that the existing technology requires manual step-by-step response. First, the heating parameters are adjusted, and then the compensation amount of the clamping plate is manually corrected based on experience or offline detection data. This time-separated operation process causes a delay in the physical process from temperature change to tension response. The lag in decision-making and execution by human intervention further amplifies the compensation deviation, causing the diaphragm to bear non-design stress under transitional conditions, inducing microporous structure collapse or local thickness deviation.

[0005] To address the aforementioned technical problems, this application provides an easily adjustable lithium battery separator processing equipment and method, including a processing table, a shaping chamber, and a cooling chamber. Multiple clamping seats are symmetrically arranged within the shaping chamber along the separator transport direction, each clamping seat being installed on one of the two side walls of the shaping chamber. Two C-shaped push plates are installed within the shaping chamber, forming a sliding fit connection with the bottom surface of the shaping chamber. Multiple air jet chambers are installed within the shaping chamber. A temperature control unit connected to the air jet chambers is installed within the shaping chamber to drive the air jet chambers to move along a direction perpendicular to the separator plane, thereby adjusting the distance between the air jet chambers and the separator, and simultaneously controlling the relative deflection of adjacent air jet chambers to form a figure-eight distribution of nozzle axes. A tension adjustment unit connected to the clamping seats and push plates is installed within the shaping chamber to drive the clamping seats on both sides of the shaping chamber to move synchronously towards each other while the air jet chambers rise, thereby compensating for the thermal expansion deformation of the separator caused by temperature rise.

[0006] In some embodiments, the temperature control unit includes a heating element disposed in a shaping chamber, which adjusts the heat intensity of the insulating film according to the heat-setting state of the insulating film. The heating element is provided with a guide element, which drives the jet chamber to deflect.

[0007] In some embodiments, the heating element includes visual sensors disposed at both ends of the shaping chamber, a plurality of telescopic rods are disposed inside the shaping chamber, a hot air chamber is disposed on the telescopic rod, the hot air chamber is connected to an external hot air pump through a hose, a lifting screw is disposed on the side of the hot air chamber opposite to the shaping chamber, a drive rod is rotatably disposed inside the shaping chamber, the drive rod is threadedly connected to the lifting screw, and one end of the drive rod is connected to a motor.

[0008] In some embodiments, the guide includes multiple fixed plates 1 disposed on the hot air chamber. Rotating shaft 1 and rotating shaft 2 are rotatably disposed on each of the multiple fixed plates 1. Both rotating shaft 1 and rotating shaft 2 are connected to the jet chamber, and the jet chamber communicates with the hot air chamber via a hose. Multiple fixed plates 2 are disposed on the hot air chamber. A drive shaft is rotatably disposed on each fixed plate 2. Both the drive shaft and rotating shaft 1 are provided with drive pulleys, and drive belts are disposed on the drive pulleys. Both the drive shaft and rotating shaft 2 are provided with connecting gears, and the two connecting gears mesh with each other. A spring box is disposed on each fixed plate 1. The rotating shaft 1 passes through the spring box and is rotatably connected to the spring box. A spring spring is disposed inside the spring box, and one end of the spring spring is connected to the rotating shaft 1. A winding reel is disposed on the rotating shaft 1, and a traction rope is disposed on the winding reel. One end of the traction rope is connected to the bottom surface of the shaping chamber.

[0009] In some embodiments, the tension adjustment unit includes an installation component disposed in a shaping chamber, which is used to install and fix the clamping seat. The shaping chamber is provided with a clamping component, which is used to clamp and fix both sides of the separator. The shaping chamber is provided with an adjustment component, which is used to drive the push plate to move, and further drive the clamping seat to move to compensate for the thermal expansion deformation of the separator caused by the temperature rise.

[0010] In some embodiments, the mounting component includes rotating chambers disposed on both sides of the shaping chamber, rotating grooves being provided on both sides of the shaping chamber and communicating with the rotating chambers, a chain conveyor belt being disposed inside the rotating chamber, one side of the chain conveyor belt extending into the shaping chamber, and a plurality of telescopic rods being disposed on the chain conveyor belt, the telescopic rods being connected to the clamping seat.

[0011] In some embodiments, the clamping member includes a pressing rod slidably disposed on a clamping seat, one end of the pressing rod passing through the clamping seat, a pressing block disposed at one end of the pressing rod, a sliding plate slidably disposed on the pressing rod, a limiting plate disposed at the end of the pressing rod away from the pressing block, a pressing spring sleeved between the limiting plate and the sliding plate, a magnet one disposed on the limiting plate, positioning plates disposed on both sides of the shaping chamber, the positioning plate being located directly above the limiting plate, and a magnet two repelling the magnet one disposed on the positioning plate.

[0012] In some embodiments, the adjusting member includes an extension rod disposed on the clamping seat, a plurality of adjusting blocks are disposed in the shaping chamber, an adjusting screw is rotatably disposed on the adjusting block, an adjusting rod is disposed on the push plate and threadedly connected to the adjusting screw, an adjusting gear one is disposed on the adjusting rod, an adjusting gear two is disposed on the drive rod and meshes with the adjusting gear one, and a return spring is sleeved on the telescopic rod two.

[0013] In some embodiments, the clamping seat is provided with a buffer groove, and a bearing block is provided in the buffer groove. The bearing block is located directly below the extrusion block. The clamping seat is provided with a moving groove, and the extrusion rod passes through the moving groove. Two sets of buffer springs are arranged in parallel in the buffer groove. One end of the first set of buffer springs is fixed to the bottom of the buffer groove, and the other end is connected to the bearing block. One end of the second set of buffer springs is fixed to the bottom of the buffer groove, and the other end is connected to the extrusion block.

[0014] In some embodiments, the processing method is as follows:

[0015] S1. Feeding and clamping: The release film is introduced into the shaping chamber. The extrusion rod is driven by the mutual repulsion force of magnet one and magnet two, so that the extrusion block and the bearing block work together to clamp the two sides of the film. At the same time, the chain conveyor belt drives the clamping seat to move synchronously with the release film to ensure that the initial tension is evenly distributed.

[0016] S2, Hot Air Shaping Stage: When the vision sensor detects that the heat intensity of the isolation membrane needs to be increased, the temperature control unit drives the jet chamber to move vertically upward and close to the membrane surface, and simultaneously controls the relative deflection of adjacent jet chambers to form a figure-eight distribution; by controlling the jet chambers to get closer to the isolation membrane, its heat intensity is increased;

[0017] S3, Dynamic Tension Compensation: During the ascent of the jet chamber, the tension adjustment unit is triggered synchronously: the drive rod drives the adjustment screw to rotate through the adjustment gear set; the push plate slides along the bottom surface of the shaping chamber, and drives the two clamping seats to move towards each other through the extension rod connected to the clamping seat; the displacement amount forms a linear correspondence with the thermal expansion deformation of the membrane material;

[0018] S4. Unloading and Resetting: After heat setting is completed, the magnetic repulsion is released, and the extrusion rod is reset under the action of the extrusion spring; the chain conveyor belt moves the clamping seat out of the working area, and the isolation film is transferred to the cooling chamber for subsequent processing.

[0019] The present invention has at least the following beneficial effects:

[0020] 1. By vertically adjusting the distance between the jet chamber and the isolation membrane, the coverage area of ​​the hot air flow field can be precisely controlled, thereby increasing the heat input intensity per unit area under a constant heat source temperature. The simultaneous implementation of the figure-eight deflection design of adjacent jet chambers allows the nozzle axis to form an adjustable tilt angle with the membrane surface. By extending the residence time of hot air on the membrane surface, the heat intensity of the isolation membrane is significantly enhanced. At the same time, the figure-eight airflow distribution pattern generates a directional turbulence effect, which destroys the static boundary layer of the membrane surface and enhances the ability of hot air to penetrate the microporous structure.

[0021] 2. At the moment when the jet chamber moves upward and triggers thermal expansion, the tension adjustment unit drives the two clamping seats on both sides to move in opposite directions through the gear-screw transmission system. The displacement is calculated by the thermal expansion coefficient model to realize real-time mechanical compensation of deformation, improve the macroscopic flatness of the membrane material, and eliminate the stress gradient caused by traditional unilateral traction by synchronous displacement design, reduce the peak value of local tensile stress, and avoid the generation of microcracks. Combined with the deformation absorption function of the buffer spring group, the uniformity of the equivalent force field of the membrane material is improved during the heat setting stage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the pre-formed compartment structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the shaping chamber of the present invention;

[0025] Figure 4 For the present invention Figure 2 Schematic diagram of the cutaway shaping chamber;

[0026] Figure 5 This is a schematic diagram of the heating element structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the adjusting component structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the guide component structure of the present invention;

[0029] Figure 8 For the present invention Figure 7 Enlarged structural diagram of area A in the middle;

[0030] Figure 9 This is a schematic diagram of the mounting component structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the clamping base structure of the present invention;

[0032] Figure 11 This is a schematic diagram of the cross-sectional structure of the clamping seat of the present invention;

[0033] Figure 12 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0034] In the diagram: 1. Processing table; 2. Shaping chamber; 3. Cooling chamber; 4. Air chamber; 5. Clamping seat; 6. Push plate; 7. Temperature control unit; 8. Heating component; 81. Vision sensor; 82. Telescopic rod one; 83. Hot air chamber; 84. Lifting screw; 85. Drive rod; 9. Guide component; 91. Fixed plate one; 92. Rotating shaft one; 93. Rotating shaft two; 94. Fixed plate two; 95. Transmission shaft; 96. Transmission pulley; 97. Transmission belt; 98. Linking gear; 99. Clockwork box; 910. Clockwork spring; 911. Winding reel; 912. Traction rope; 10. Tension adjustment unit; 11. Mounting component; 111. Rotating chamber; 112. Rotating groove; 113. Chain conveyor belt; 114. Telescopic rod II; 12. Clamping component; 121. Extrusion rod; 122. Extrusion block; 123. Sliding plate; 124. Limiting plate; 125. Extrusion spring; 126. Magnet I; 127. Positioning plate; 128. Magnet II; 13. Adjusting component; 131. Extension rod; 132. Adjusting block; 133. Adjusting screw; 134. Adjusting rod; 135. Adjusting gear I; 136. Adjusting gear II; 14. Buffer groove; 15. Moving groove; 16. Bearing block; 17. Buffer spring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1-11 This invention provides a technical solution: an easily adjustable lithium battery separator processing equipment and processing method, including a processing table 1, a shaping chamber 2, and a cooling chamber 3. Multiple clamping seats 5 are symmetrically arranged within the shaping chamber 2 along the separator transport direction, each clamping seat 5 being installed on one of the two side walls of the shaping chamber 2. Two C-shaped push plates 6 are provided within the shaping chamber 2, the push plates 6 forming a sliding fit connection with the bottom surface of the shaping chamber 2. Multiple air jet chambers 4 are installed within the shaping chamber 2. A temperature control unit 7 connected to the air jet chambers 4 is provided within the shaping chamber 2 to drive the air jet chambers 4 to move along a direction perpendicular to the separator plane, thereby adjusting the distance between the air jet chambers 4 and the separator, and simultaneously controlling the relative deflection of adjacent air jet chambers 4 to form a figure-eight distribution of the nozzle axes. A tension adjustment unit connected to the clamping seats 5 and the push plates 6 is provided within the shaping chamber 2 to drive the clamping seats 5 on both sides of the shaping chamber 2 to move synchronously towards each other while the air jet chambers 4 rise, thereby compensating for the thermal expansion deformation of the separator caused by heating.

[0037] The temperature control unit 7 includes a heating element 8 disposed in the shaping chamber 2. The heating element 8 is used to adjust the heat intensity of the isolation film according to the heat shaping state of the isolation film. The heating element 8 is provided with a guide 9, which is used to drive the jet chamber 4 to deflect.

[0038] The heating element 8 includes vision sensors 81 disposed at both ends of the shaping chamber 2. The shaping chamber 2 is provided with multiple telescopic rods 82. Each telescopic rod 82 is provided with a hot air chamber 83. The hot air chamber 83 is connected to an external hot air pump through a hose. A lifting screw 84 is disposed on the side of the hot air chamber 83 opposite to the shaping chamber 2. A drive rod 85 is rotatably disposed inside the shaping chamber 2. The drive rod 85 is threadedly connected to the lifting screw 84. One end of the drive rod 85 is connected to a motor.

[0039] During the heat setting process of the isolation membrane, when the vision sensor 81 detects that the heat intensity of the isolation membrane needs to be increased, the motor first drives the drive rod 85 to rotate. While the drive rod 85 rotates, it pushes the lifting screw 84 connected to it to drive the hot air chamber 83 to rise. When the hot air chamber 83 rises, it drives the jet chamber 4, which is set on it and connected to it, to come closer to the isolation membrane. This increases the heat intensity of the isolation membrane without increasing the temperature of the heat source. When the distance between the jet chamber 4 and the isolation membrane is shortened, the shortening of the hot air transfer path will reduce the heat exchange loss between the airflow and the environment, while enhancing the impact speed and turbulence effect of the airflow, so that the heat can be applied to the membrane surface more efficiently. The vertical displacement adjustment of the jet chamber 4 can achieve dynamic control of the heat intensity of the membrane surface without changing the initial temperature parameters by changing the hot air coverage density and flow velocity distribution.

[0040] The dynamic control of the heat transfer path is achieved through a mechanical linkage structure, which not only ensures process stability but also creates multiple optimization effects: the displacement adjustment of the jet chamber 4 not only directly shortens the hot air conduction distance to reduce heat loss, but also improves the uniformity of the thermal field by enhancing turbulence intensity, making the film surface more evenly heated; the precise control of the vertical distance can flexibly adapt to the heat intensity requirements of different process stages, improving energy utilization efficiency while avoiding overloading of the heat source; the coordinated adjustment mechanism of hot air coverage density and flow velocity distribution not only maintains the stability of basic temperature control parameters, but also improves thermodynamic efficiency through the displacement adjustment of the jet chamber 4.

[0041] The guide member 9 includes multiple fixed plates 91 disposed on the hot air chamber 83. A rotating shaft 92 and a rotating shaft 93 are rotatably mounted on each of the fixed plates 91. Both the rotating shaft 92 and the rotating shaft 93 are connected to the jet chamber 4, which is connected to the hot air chamber 83 via a flexible hose. Multiple fixed plates 94 are disposed on the hot air chamber 83. A drive shaft 95 is rotatably mounted on each of the fixed plates 94. Both the drive shaft 95 and the rotating shaft 92 are equipped with drive pulleys 96, and drive belts 96 are mounted on the drive pulleys 96. 7. Both the transmission shaft 95 and the second rotating shaft 93 are equipped with connecting gears 98, and the two connecting gears 98 mesh with each other. The first fixed plate 91 is equipped with a spring box 99. The first rotating shaft 92 passes through the spring box 99 and is rotatably connected to the spring box 99. The spring box 99 is equipped with a spring spring 910. One end of the spring spring 910 is connected to the first rotating shaft 92. The first rotating shaft 92 is equipped with a winding reel 911. The winding reel 911 is equipped with a traction rope 912. One end of the traction rope 912 is connected to the bottom surface of the shaping chamber 2.

[0042] As the hot air chamber 83 rises, the winding reel 911 rotates under the pull of the traction rope 912. The rotation of the winding reel 911 drives the first rotating shaft 92 to rotate. The rotation of the first rotating shaft 92 drives the transmission shaft 95 to rotate through the transmission belt 97 and transmission pulley 96 mounted on it. The rotation of the transmission shaft 95 drives the connecting gear 98 mounted on it to rotate. The rotation of the connecting gear 98 drives the gear meshing with it on the second rotating shaft 93. The connecting gear 98 rotates synchronously, thereby driving the rotating shaft to rotate in the opposite direction to the first rotating shaft 92. The first rotating shaft 92 and the second rotating shaft 93 rotate in opposite directions, synchronously driving the jet chamber 4 connected to them to deflect in the opposite direction, so that the two adjacent jet chambers 4 form a figure-eight shape, thereby causing the gas ejected from the jet chamber 4 to collide, thus improving the heating efficiency of the isolation membrane.

[0043] Through a reverse synchronous transmission mechanism, the dynamic deflection and thermal field distribution of the jet chamber 4 are optimized simultaneously: when the rotating shaft 1 92 and the rotating shaft 2 93 rotate in opposite directions, they drive the adjacent jet chamber 4 to form a symmetrical figure-eight deflection structure, causing the ejected hot airflow to form a counter-current effect on the surface of the isolation membrane. By enhancing the turbulence intensity and contact area generated by the airflow collision, the heat transfer efficiency is significantly improved. The linkage gear meshing and belt drive structure ensures that the dual-axis motion is strictly synchronized, so that the spatial distribution of the counter-current airflow remains uniform and stable, avoiding local overheating or thermal field distortion. Based on the heat flow control mode of the physical deflection angle, the thermal energy action path is directly optimized through mechanical structure reconstruction without changing the heat source temperature or wind pressure parameters. This maintains the stability of process parameters and achieves a refined improvement in heat intensity through the synergistic effect of thermodynamics and fluid mechanics.

[0044] The tension adjustment unit 10 includes an installation component 11 disposed in the shaping chamber 2, which is used to install and fix the clamping seat 5. The shaping chamber 2 is provided with a clamping component 12, which is used to clamp and fix both sides of the isolation membrane. The shaping chamber 2 is provided with an adjustment component 13, which is used to drive the push plate 6 to move, further driving the clamping seat 5 to move to compensate for the thermal expansion deformation of the isolation membrane caused by the temperature rise.

[0045] Mounting component 11 includes rotating chambers 111 disposed on both sides of the shaping chamber 2. Rotating grooves 112 are provided on both sides of the shaping chamber 2, and the rotating grooves 112 are connected to the rotating chambers 111. A chain conveyor belt 113 is disposed inside the rotating chamber 111. One side of the chain conveyor belt 113 extends into the shaping chamber 2. Multiple telescopic rods 114 are disposed on the chain conveyor belt 113, and the telescopic rods 114 are connected to the clamping seat 5.

[0046] Limiting devices are installed on both the upper and lower sides of the chain conveyor belt 113 to limit its movement and prevent deformation of the conveyor belt 113 caused by tension changes in the separator membrane, which would affect the heat setting effect of the separator membrane. The upper and lower double-sided limiting devices effectively suppress the lateral displacement or local deformation of the conveyor belt under dynamic tension through rigid constraints, ensuring that the contact trajectory between the clamping seat 5 and the separator membrane always matches the preset heat source distribution, avoiding uneven heating of the membrane surface caused by conveyor belt deviation. The metal chain conveyor belt 113, with its high strength and thermal stability, maintains structural rigidity in high-temperature environments. Combined with the synchronous drive device, it accurately transmits the traction force of the clamping seat 5, enabling the separator membrane and the clamping seat 5 to achieve synchronous movement without slippage, thereby eliminating internal stress distortion of the membrane material caused by traction lag. The cooperation of the two not only ensures the positioning accuracy of the membrane surface in the thermal field, but also reduces process fluctuations through the stability of mechanical transmission, ultimately forming a uniform and controllable thermodynamic environment, significantly improving the consistency of the heat setting quality.

[0047] The clamping member 12 includes a pressing rod 121 slidably disposed on the clamping seat 5. One end of the pressing rod 121 passes through the clamping seat 5, and a pressing block 122 is disposed at one end of the pressing rod 121. A sliding plate 123 is slidably disposed on the pressing rod 121. A limiting plate 124 is disposed at the end of the pressing rod 121 away from the pressing block 122. A pressing spring 125 is sleeved between the pressing rod 121 and the limiting plate 124 and the sliding plate 123. A magnet 126 is disposed on the limiting plate 124. Positioning plates 127 are disposed on both sides of the shaping chamber 2. The positioning plates 127 are located directly above the limiting plate 124. A magnet 128 that repels the magnet 126 is disposed on the positioning plate 127.

[0048] During the movement of the clamping seat 5, after the clamping seat 5 moves into the shaping chamber 2, the magnet 126 on the limiting plate 124 moves below the magnet 128 and, driven by the repulsive magnetic field, overcomes the resistance of the compression spring 125, causing the compression rod 121 and the compression block 122 to descend, thereby achieving the effect of clamping and fixing the edge of the isolation film. Then, the clamping seat 5 clamps and fixes both sides of the isolation film and moves synchronously with the isolation film in the shaping chamber 2. After the clamping seat 5 moves to the discharge port, the magnet 126 and the magnet 128 are displaced and separated. At this time, the magnet 126 is no longer under pressure and is reset under the push of the compression spring 125, releasing the fixation of the isolation film.

[0049] Through the synergistic effect of magnetically controlled mechanical structure and elastic reset, intelligent and high-precision dynamic control of the membrane clamping process is achieved: when the clamping seat 5 enters the shaping chamber 2, the magnet 126 on the limiting plate 124 and the preset magnet 128 form a repulsive magnetic field. This non-contact magnetic driving force overcomes the resistance of the compression spring 125 and pushes the compression rod 121 and the compression block 122 down to achieve non-destructive rigid fixation of the membrane edge with constant force; during synchronous movement, the stable clamping state maintained by the magnetic repulsion force ensures that the membrane and the clamping seat 5 are completely synchronized in displacement, eliminating membrane wrinkles or tension fluctuations caused by relative sliding; during the release stage, the magnetic field effect is automatically released through the displacement-triggered magnetic pole misalignment mechanism, and the elastic reset characteristic of the compression spring 125 drives the clamping component to release the membrane instantaneously. No external intervention is required throughout the process. This mechanism converts magnetic field energy into precise mechanical action, which avoids the energy consumption and hysteresis defects of traditional hydraulic and pneumatic systems, and achieves the adaptability of clamping force and release timing in a purely physical way, significantly improving the reliability of membrane positioning and process continuity during heat setting.

[0050] The adjusting component 13 includes an extension rod 131 mounted on the clamping seat 5. The shaping chamber 2 is provided with multiple adjusting blocks 132. An adjusting screw 133 is rotatably mounted on the adjusting block 132. An adjusting rod 134 is mounted on the push plate 6 and threadedly connected to the adjusting screw 133. An adjusting gear 135 is mounted on the adjusting rod 134. An adjusting gear 136 that meshes with the adjusting gear 135 is mounted on the drive rod 85. A return spring is sleeved on the telescopic rod 114.

[0051] While the drive rod 85 rotates to drive the hot air chamber 83 to rise, it drives the second adjustment gear 136 set on it to rotate. The rotation of the second adjustment gear 136 drives the first adjustment gear 135 meshing with it to rotate, thereby causing the adjustment screw 133 to rotate. The rotation of the adjustment screw 133 drives the adjustment rod 134 meshing with it and the push plate 6 connected to the adjustment rod 134 to move. The movement of the push plate 6 drives the clamping seats 5 on both sides of the shaping chamber 2 to move towards each other, thereby compensating for the thermal expansion deformation of the membrane material.

[0052] Through the mechanical linkage mechanism of the gear-screw composite transmission system, adaptive compensation for thermal expansion deformation and simultaneous improvement of process precision are achieved: during the rotation of the drive rod 85, the meshing transmission of the adjusting gear set precisely decomposes the power into two dimensions: the lifting of the hot air chamber 83 and the displacement of the clamping seat 5. This allows the clamping seat 5 to immediately generate opposite displacements when the membrane material expands due to heat, and the deformation is offset in real time by the linear motion of the rigid push plate 6. The high transmission precision of the gear meshing and screw ensures that the compensation displacement matches the thermal expansion rate, avoiding the lag or over-adjustment phenomenon in the traditional passive compensation mode. The closed-loop characteristic of the whole mechanical linkage maintains the dynamic balance of the clamping force and eliminates the coordination error between multiple execution units through the rigid constraint of the physical transmission chain, ensuring the high stability of the membrane material heat setting process.

[0053] The processing method is as follows:

[0054] S1. Feeding and clamping: The release film is introduced into the shaping chamber 2. The extrusion rod 121 is driven to move by the mutual repulsion force of magnet 126 and magnet 228, so that the extrusion block 122 and the bearing block 16 cooperate to clamp the two sides of the film material. At the same time, the chain conveyor belt 113 drives the clamping seat 5 to move synchronously with the release film to ensure that the initial tension is evenly distributed.

[0055] S2, Hot air setting stage: When the vision sensor 81 detects that the heat intensity of the isolation film needs to be increased, the temperature control unit 7 drives the jet chamber 4 to move vertically upward and close to the film surface, and simultaneously controls the relative deflection of the adjacent jet chambers 4 to form a figure-eight distribution; by controlling the jet chambers 4 to get closer to the isolation film, its heat intensity is increased;

[0056] S3, Dynamic tension compensation: During the ascent of the jet chamber 4, the tension adjustment unit is triggered synchronously: the drive rod 85 drives the adjustment screw 133 to rotate through the adjustment gear set; the push plate 6 slides along the bottom surface of the shaping chamber 2, and drives the two clamping seats 5 to move towards each other through the extension rod 131 connected to the clamping seat 5; the displacement amount forms a linear correspondence with the thermal expansion deformation of the membrane material.

[0057] S4. Unloading and Resetting: After heat setting is completed, the magnetic repulsion is released, and the extrusion rod 121 is reset under the action of the extrusion spring 125; the chain conveyor belt 113 moves the clamping seat 5 out of the working area, and the isolation film is transferred to the cooling chamber 3 for subsequent processing.

[0058] Example 2: Please refer to Figure 12The present invention provides a technical solution: a buffer groove 14 is provided on the clamping seat 5, and a bearing block 16 is provided in the buffer groove 14. The bearing block 16 is located directly below the extrusion block 122. A moving groove 15 is opened on the clamping seat 5, and the extrusion rod 121 passes through the moving groove 15. Two sets of buffer springs 17 are arranged in parallel in the buffer groove 14. One end of the first set of buffer springs 17 is fixed to the bottom of the buffer groove 14, and the other end is connected to the bearing block 16. One end of the second set of buffer springs 17 is fixed to the bottom of the buffer groove 14, and the other end is connected to the extrusion block 122. The clamping seat 5 is provided with... There is a movable support block 16, and two sets of independent buffer springs 17 are provided in the buffer groove 14, which are respectively connected to the support block 16 and the extrusion block 122. The isolation membrane is sandwiched between the support block 16 and the extrusion block 122 to avoid tension changes caused by sudden temperature fluctuations. This design realizes the adaptive control of the dynamic tension of the isolation membrane and thermal shock protection: when the isolation membrane deforms due to temperature fluctuations, the support block 16 forms a floating contact surface in the buffer groove 14 with the elastic support of the two sets of buffer springs 17. The instantaneous expansion and contraction of the membrane material is absorbed in real time through displacement compensation to avoid stress concentration caused by rigid clamping.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An easily adjustable lithium battery separator processing equipment, comprising a processing table (1), a shaping chamber (2), and a cooling chamber (3), characterized in that: Multiple clamping seats (5) are symmetrically arranged inside the shaping chamber (2) along the transmission direction of the isolation membrane, and each clamping seat (5) is installed on one of the two side walls of the shaping chamber (2); two C-shaped push plates (6) are provided inside the shaping chamber (2), and the push plates (6) are slidably connected to the bottom surface of the shaping chamber (2); multiple air jet chambers (4) are installed inside the shaping chamber (2); a temperature control unit (7) connected to the air jet chambers (4) is provided inside the shaping chamber (2) to drive the air jets. The chamber (4) moves along the direction perpendicular to the plane of the isolation membrane to adjust the distance between the jet chamber (4) and the isolation membrane, and simultaneously controls the relative deflection of the adjacent jet chambers (4) to form a figure-eight distribution of the nozzle axis. The shaping chamber (2) is provided with a tension adjustment unit connected to the clamping seat (5) and the push plate (6) to drive the clamping seats (5) on both sides of the shaping chamber (2) to move synchronously towards each other while the jet chamber (4) rises, so as to compensate for the thermal expansion deformation of the isolation membrane caused by the temperature rise.

2. The easily adjustable lithium battery separator processing equipment according to claim 1, characterized in that: The temperature control unit (7) includes a heating element (8) installed in the shaping chamber (2). The heating element (8) is used to adjust the heat intensity of the isolation film according to the heat shaping state of the isolation film. The heating element (8) is provided with a guide element (9), which is used to drive the jet chamber (4) to deflect.

3. The easily adjustable lithium battery separator processing equipment according to claim 2, characterized in that: The heating element (8) includes vision sensors (81) installed at both ends of the shaping chamber (2). The shaping chamber (2) is provided with multiple telescopic rods (82). Each telescopic rod (82) is provided with a hot air chamber (83). The hot air chamber (83) is connected to an external hot air pump through a hose. A lifting screw (84) is provided on the side of the hot air chamber (83) opposite to the shaping chamber (2). A drive rod (85) is rotatably installed inside the shaping chamber (2). The drive rod (85) is threadedly connected to the lifting screw (84). One end of the drive rod (85) is connected to a motor.

4. The easily adjustable lithium battery separator processing equipment according to claim 3, characterized in that: The guide member (9) includes multiple fixed plates (91) disposed on the hot air chamber (83). Rotating shafts (92 and 93) are rotatably disposed on the multiple fixed plates (91). Both rotating shafts (92 and 93) are connected to the jet chamber (4), which is connected to the hot air chamber (83) via a flexible hose. Multiple fixed plates (94) are disposed on the hot air chamber (83). A drive shaft (95) is rotatably disposed on each fixed plate (94). Both the drive shaft (95) and rotating shafts (92) are equipped with drive pulleys (96), and each drive pulley (96) is equipped with a drive belt. 97), both the transmission shaft (95) and the second rotating shaft (93) are equipped with connecting gears (98), and the two connecting gears (98) mesh with each other. The first fixed plate (91) is equipped with a spring box (99). The first rotating shaft (92) passes through the spring box (99) and is rotatably connected to the spring box (99). The spring box (99) is equipped with a spring spring (910). One end of the spring spring (910) is connected to the first rotating shaft (92). The first rotating shaft (92) is equipped with a winding wheel (911). The winding wheel (911) is equipped with a traction rope (912). One end of the traction rope (912) is connected to the bottom surface of the shaping chamber (2).

5. The easily adjustable lithium battery separator processing equipment according to claim 4, characterized in that: The tension adjustment unit (10) includes an installation component (11) installed in the shaping chamber (2) to install and fix the clamping seat (5). The shaping chamber (2) is provided with a clamping component (12) to clamp and fix both sides of the isolation membrane. The shaping chamber (2) is provided with an adjustment component (13) to drive the push plate (6) to move, which in turn drives the clamping seat (5) to move to compensate for the thermal expansion deformation of the isolation membrane caused by the temperature rise.

6. The easily adjustable lithium battery separator processing equipment according to claim 5, characterized in that: The mounting component (11) includes rotating chambers (111) arranged on both sides of the shaping chamber (2). Rotating grooves (112) are provided on both sides of the shaping chamber (2). The rotating grooves (112) are connected to the rotating chambers (111). A chain conveyor belt (113) is provided inside the rotating chamber (111). One side of the chain conveyor belt (113) extends into the shaping chamber (2). Multiple telescopic rods (114) are provided on the chain conveyor belt (113). The telescopic rods (114) are connected to the clamping seat (5).

7. The easily adjustable lithium battery separator processing equipment according to claim 6, characterized in that: The clamping member (12) includes a pressing rod (121) slidably disposed on the clamping seat (5). One end of the pressing rod (121) passes through the clamping seat (5). A pressing block (122) is provided at one end of the pressing rod (121). A sliding plate (123) is slidably disposed on the pressing rod (121). A limiting plate (124) is provided at the end of the pressing rod (121) away from the pressing block (122). A pressing spring (125) is sleeved between the limiting plate (124) and the sliding plate (123) of the pressing rod (121). A magnet (126) is provided on the limiting plate (124). A positioning plate (127) is provided on both sides of the shaping chamber (2). The positioning plate (127) is located directly above the limiting plate (124). A magnet (128) that repels the magnet (126) is provided on the positioning plate (127).

8. The easily adjustable lithium battery separator processing equipment according to claim 7, characterized in that: The adjusting component (13) includes an extension rod (131) disposed on the clamping seat (5), a plurality of adjusting blocks (132) are disposed in the shaping chamber (2), an adjusting screw (133) is rotatably disposed on the adjusting block (132), an adjusting rod (134) is disposed on the push plate (6) and threadedly connected to the adjusting screw (133), an adjusting gear one (135) is disposed on the adjusting rod (134), an adjusting gear two (136) is disposed on the drive rod (85) and meshes with the adjusting gear one (135), and a return spring is sleeved on the telescopic rod two (114).

9. The easily adjustable lithium battery separator processing equipment according to claim 8, characterized in that: The clamping seat (5) is provided with a buffer groove (14), and a bearing block (16) is provided in the buffer groove (14). The bearing block (16) is located directly below the extrusion block (122). The clamping seat (5) is provided with a moving groove (15), and the extrusion rod (121) passes through the moving groove (15). Two sets of buffer springs (17) are provided in the buffer groove (14). One end of the first set of buffer springs (17) is fixed to the bottom of the buffer groove (14), and the other end is connected to the bearing block (16). One end of the second set of buffer springs (17) is fixed to the bottom of the buffer groove (14), and the other end is connected to the extrusion block (122).

10. A processing method applicable to the easily adjustable lithium battery separator processing equipment described in any one of claims 1 to 9, characterized in that: The processing method is as follows: S1. Feeding and clamping: The release film is introduced into the shaping chamber (2). The extrusion rod (121) is driven to move by the mutual repulsion force of magnet one (126) and magnet two (128), so that the extrusion block (122) and the bearing block (16) work together to clamp the two sides of the film. At the same time, the chain conveyor belt (113) drives the clamping seat (5) to move synchronously with the release film to ensure that the initial tension is evenly distributed. S2, Hot air setting stage: When the vision sensor (81) detects that the heat intensity of the isolation film needs to be increased, the temperature control unit (7) drives the jet chamber (4) to move vertically upward and close to the film surface, and simultaneously controls the relative deflection of the adjacent jet chambers (4) to form a figure-eight distribution; by controlling the jet chambers (4) to get closer to the isolation film, its heat intensity is increased; S3, Dynamic tension compensation: During the upward movement of the jet chamber (4), the tension adjustment unit (10) is triggered synchronously: the drive rod (85) drives the adjustment screw (133) to rotate through the adjustment gear set; the push plate (6) slides along the bottom surface of the shaping chamber (2), and drives the two clamping seats (5) to move towards each other through the extension rod (131) connected to the clamping seat (5); the displacement amount forms a linear correspondence with the thermal expansion deformation of the membrane material; S4. Unloading and resetting: After heat setting is completed, the magnetic repulsion is released, and the extrusion rod (121) is reset under the action of the extrusion spring (125); the chain conveyor belt (113) moves the clamping seat (5) out of the working area, and the isolation film is transferred to the cooling chamber (3) for subsequent processing.

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