Automatic diaphragm unwinding and pressing device

Abstract

The utility model discloses an automatic diaphragm unwinding and pressing device which comprises a rack, an unwinding mechanism and a pressing mechanism, and a pressing station is arranged on the rack; the unwinding mechanism is rotatably connected to the rack, and the unwinding mechanism is used for outputting a diaphragm belt in the rotating process and guiding the diaphragm belt to a pressing station; the pressing mechanism is arranged at the pressing station; the pressing mechanism comprises a driving assembly, a first pressing piece and a second pressing piece, and the first pressing piece and the second pressing piece are oppositely arranged; and the driving assembly drives the first pressing piece and the second pressing piece to be close to each other, so that the first pressing piece and the second pressing piece press the diaphragm belt and the pole piece. The unwinding mechanism and the pressing mechanism are integrated into the same device, the unwinding mechanism can stably and continuously output a diaphragm belt and directly provide materials for the pressing mechanism, the pressing mechanism can automatically press a pole piece and a diaphragm, the production efficiency is effectively improved, and the requirement of large-scale production is met.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing, and in particular to an automatic unwinding and pressing device for a separator. Background Technology

[0002] In battery production, especially in the assembly process of separators and electrodes, manual or semi-automated equipment is often used for unwinding the separator and pressing the separator and electrode together. However, manual operation is inefficient and cannot meet the speed and output requirements of large-scale production. Moreover, manual operation has limitations in precision control. For example, during separator unwinding, it is difficult to accurately control the tension, trajectory, and stability of the unwinding speed of the separator tape, which can easily lead to wrinkles, misalignment, or uneven tension in the separator tape, thus affecting the pressing quality of the separator and electrode.

[0003] Furthermore, in the pressing process, manual operation makes it difficult to guarantee the uniformity of pressure, the consistency of temperature, and the precision of pressing time for each pressing. This may result in loose or incomplete bonding between the electrode and the separator, or damage to the separator or electrode, ultimately affecting the battery's performance, safety, and lifespan. Utility Model Content

[0004] In order to overcome at least one of the defects described in the prior art, this application provides an automatic unwinding and pressing device for diaphragms, which integrates the unwinding mechanism and the pressing mechanism into the same device to achieve automatic unwinding and automatic pressing, thereby avoiding the risk of misoperation that may occur when operators switch between different devices.

[0005] The technical solution adopted in this application to solve its problem is:

[0006] An automatic diaphragm unwinding and pressing device includes,

[0007] A frame, wherein a pressing station is provided on the frame;

[0008] An unwinding mechanism is rotatably connected to the frame and is used to output the diaphragm belt during rotation and guide the diaphragm belt to the pressing station;

[0009] A pressing mechanism is provided at the pressing station; the pressing mechanism includes a driving component, a first pressing component and a second pressing component, the first pressing component and the second pressing component being disposed opposite to each other; the driving component drives the first pressing component and the second pressing component to move closer to each other, so that the first pressing component and the second pressing component press the diaphragm strip and the electrode sheet together.

[0010] As a preferred technical solution of this application, the first pressing component includes a stacking table, the second pressing component includes a pressing table, and the stacking table is disposed below the pressing table; the driving assembly includes a first driving component and a second driving component, the power output end of the first driving component is connected to the stacking table, and the power output end of the second driving component is connected to the pressing table.

[0011] As a preferred technical solution of this application, the stacking stage is provided with a first mounting block, and the first mounting block is provided with a negative pressure generator. The negative pressure generator is used to form a negative pressure on the surface of the first mounting block to adsorb the electrode sheet; the pressing stage is provided with a second mounting block, and the surface of the second mounting block is used to adhere to the diaphragm tape.

[0012] As a preferred technical solution of this application, the upper surface of the first mounting block is formed as a first heating surface, and the lower surface of the second mounting block is formed as a second heating surface; the pressing mechanism includes a first heating element and a second heating element, the first heating element is used to heat the first heating surface, and the first heating surface is used to heat the electrode sheet; the second heating element is used to heat the second heating surface, and the second heating surface is used to heat the diaphragm strip; the first mounting block and the second mounting block are used to thermally press the electrode sheet and the diaphragm strip together after approaching the pressing station.

[0013] As a preferred technical solution of this application, a clamping assembly is provided on one side of the pressing station. The clamping assembly includes a third driving member and two clamping arms arranged opposite to each other. The third driving member is used to drive the two clamping arms to move closer to each other or further away from each other, so that the clamping arms clamp or release the diaphragm belt.

[0014] As a preferred technical solution of this application, the unwinding mechanism includes an unwinding component and a guiding component. The unwinding component is used to wind up the diaphragm tape; the guiding component is used to receive the diaphragm tape released by the unwinding component to guide the diaphragm tape into the pressing station in a taut state.

[0015] As a preferred technical solution of this application, the unwinding assembly includes a fourth driving member and a mounting shaft. The fourth driving member is used to drive the mounting shaft, and the mounting shaft is used to mount the diaphragm roll. The guiding assembly includes a swing shaft assembly, which includes a fifth driving member, a swing shaft, and a first sensor. The fifth driving member is used to drive the swing shaft to swing so that the swing shaft adjusts the tension of the diaphragm belt. The first sensor is used to detect the swing amplitude of the swing shaft.

[0016] As a preferred technical solution of this application, the guiding component includes a buffer component, the buffer component includes a buffer shaft, a sixth driving member and a second sensor, the sixth driving member is used to drive the buffer shaft to move laterally so that the buffer shaft buffers the diaphragm strip; the second sensor is used to detect the position of the buffer shaft and generate a first electrical signal, and the fourth driving member starts and stops according to the first electrical signal.

[0017] As a preferred technical solution of this application, the frame includes a mounting frame and a fixing frame, the unwinding mechanism is mounted on the mounting frame, and the mounting frame and the fixing frame are slidably engaged; the guiding assembly includes a correction assembly, the correction assembly includes a seventh drive member, a third sensor and a fourth sensor, the power output end of the seventh drive member is connected to the mounting frame, the third sensor is used to detect the deviation of the diaphragm belt and generate a second electrical signal when the sixth drive member drives the buffer shaft to move in the opposite direction, the seventh drive member starts and stops according to the second electrical signal to adjust the relative position of the mounting frame and the fixing frame, and the fourth sensor is used to detect the moving distance of the mounting frame.

[0018] As a preferred embodiment of this application, the unwinding mechanism includes a roll-changing assembly disposed between the unwinding assembly and the guiding assembly. The roll-changing assembly includes a pressure plate, an eighth driving member, a ninth driving member, a first pressure plate, and a second pressure plate. The first pressure plate is mounted on the pressure plate and forms a first holding interval with the pressure plate. The second pressure plate is mounted on the pressure plate and forms a second holding interval with the pressure plate. A connecting interval is formed between the first pressure plate and the second pressure plate. The eighth driving member drives the first pressure plate to move and hold a new diaphragm tape in the first holding interval. The ninth driving member drives the second pressure plate to move and hold an old diaphragm tape in the second holding interval, so that the new diaphragm tape and the old diaphragm tape are connected within the connecting interval.

[0019] In summary, the automatic unwinding and pressing device for diaphragms provided in this application has the following technical advantages:

[0020] 1) This application integrates the unwinding mechanism and the pressing mechanism into the same device, achieving automatic unwinding and automatic pressing, which greatly improves production speed and avoids the problem of inconsistent product quality caused by manual operation. The unwinding mechanism can stably and continuously output the separator tape, directly providing material to the pressing mechanism. The pressing mechanism can automatically press the electrode sheet and separator, so that each pressing operation can be completed quickly and accurately, shortening the cycle time of production of a single battery cell, thereby significantly improving the production efficiency of the entire battery production line and meeting the needs of large-scale production.

[0021] 2) The unwinding mechanism can precisely control the length of the diaphragm tape during the unwinding process, avoiding material waste caused by excessive unwinding length or inaccurate control. Because the unwinding mechanism is integrated with the pressing mechanism, the distance between them is shortened. By optimizing the connection between the unwinding and pressing processes, unnecessary diaphragm tape consumption is reduced, production costs are lowered, and material utilization is improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the automatic unwinding and pressing device for the diaphragm according to an embodiment of this application;

[0023] Figure 2 for Figure 1 Another structural diagram of the time period;

[0024] Figure 3 This is a schematic diagram of the pressing mechanism according to an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the unwinding mechanism according to an embodiment of this application.

[0026] The meanings of the reference numerals in the attached figures are as follows:

[0027] 10. Frame; 101. Mounting bracket; 102. Fixing bracket; 103. Slide rail; 11. Mounting shaft; 12. Fourth drive component; 13. Swing shaft assembly; 131. Fifth drive component; 132. Swing shaft; 133. First sensor; 134. Swing frame; 14. Buffer shaft; 141. Sixth drive component; 142. Second sensor; 143. Moving seat; 144. Guide rail; 15. Seventh drive component; 160. Eighth drive component; 161. Ninth drive component; 162. First pressure belt; 1621. First holding interval; 1 63. Second pressure belt; 1631. Second pressing interval; 17. Diaphragm belt schematic diagram; 18. Static eliminator; 19. Fifth sensor; 20. Pressing mechanism; 21. Stacking stage; 22. Pressing platform; 23. First driving component; 24. Second driving component; 25. First mounting block; 251. First heating surface; 26. Second mounting block; 27. First heating component; 28. Second heating component; 30. Clamping assembly; 31. Third driving component; 32. Clamping arm; 33. Third sensor; 34. Fourth sensor; 40. Diaphragm belt. Detailed Implementation

[0028] To better understand and implement this application, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings.

[0029] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0031] See Figure 1 and Figure 2 This application discloses an automatic unwinding and pressing device for diaphragms, comprising a frame 10, an unwinding mechanism, and a pressing mechanism 20. Specifically, the frame 10 is provided with a pressing station; the unwinding mechanism is rotatably connected to the frame 10, and is used to output the diaphragm belt 40 during rotation and guide the diaphragm belt 40 to the pressing station. The pressing mechanism 20 is disposed at the pressing station, see reference. Figure 3 The pressing mechanism 20 includes a driving assembly, a first pressing member, and a second pressing member, which are disposed opposite to each other. The driving assembly is used to drive the first pressing member and the second pressing member to move closer to each other, so that the first pressing member and the second pressing member press the diaphragm strip 40 and the electrode sheet together.

[0032] Based on this structure, when using the automatic unwinding and pressing device for diaphragms of this application, the diaphragm roll is first installed on the unwinding mechanism, which is rotatably connected to the frame 10 to ensure that the diaphragm roll can be smoothly unwound. At this time, the first pressing component and the second pressing component of the pressing mechanism 20 are in an initial state away from the pressing station under the action of the drive assembly, leaving space for the introduction of the diaphragm belt 40.

[0033] Then, the unwinding mechanism is started, and it begins to rotate and output the diaphragm belt 40. The diaphragm belt 40 is pulled to the pressing station on the frame 10 according to the diaphragm belt path diagram 17 on the frame 10, and the end of the diaphragm belt 40 is clamped and tightened by the mechanical claw, completing the diaphragm preparation action. In this process, the unwinding mechanism precisely controls the tension and unwinding speed of the diaphragm belt 40 to ensure that the diaphragm belt 40 is transmitted smoothly and to avoid problems such as slack, wrinkles or excessive stretching.

[0034] While the diaphragm belt 40 is being guided to the pressing station, the electrode is placed below the diaphragm belt 40. Specifically, the electrode can be loaded using an automated loading mechanism (such as a robotic arm, conveyor belt, etc.). The loading mechanism needs to ensure that the electrode is accurately positioned at a predetermined location on the diaphragm belt 40, aligned with the diaphragm belt 40, and that the electrode remains flat and positionally stable.

[0035] Once the diaphragm belt 40 and the electrode are ready, the drive assembly of the pressing mechanism 20 begins operation, driving the first and second pressing members to approach each other. During this approach, the first and second pressing members apply pressure to the diaphragm belt 40 and the electrode, pressing them tightly together.

[0036] After pressing is completed, the drive assembly drives the first and second pressing components away from each other, releasing the pressed diaphragm and electrode assembly. At this point, the pressed product can be transferred to the next process for further processing, such as battery cell encapsulation, via a subsequent conveying device (such as a conveyor belt or mechanical gripper). Simultaneously, the unwinding mechanism continues to unwind, providing new diaphragm strip 40 for the next electrode pressing. The entire process is cyclical, achieving continuous production.

[0037] Therefore, this application integrates the unwinding mechanism and the pressing mechanism 20 into the same device, achieving automatic unwinding and automatic pressing, which greatly improves production speed and avoids the problem of inconsistent product quality caused by manual operation. The unwinding mechanism can stably and continuously output the separator tape 40, directly providing material to the pressing mechanism 20. The pressing mechanism 20 can automatically press the electrode sheet and the separator, so that each pressing operation can be completed quickly and accurately, shortening the cycle time of production of a single battery cell, thereby significantly improving the production efficiency of the entire battery production line and meeting the needs of large-scale production.

[0038] Furthermore, the unwinding mechanism can precisely control the length of the diaphragm belt 40 during the unwinding process, avoiding material waste caused by excessive unwinding length or inaccurate control. Because the unwinding mechanism and the pressing mechanism 20 are integrated, the distance between them is shortened. By optimizing the connection between the unwinding and pressing processes, unnecessary consumption of the diaphragm belt 40 is reduced, production costs are lowered, and material utilization is improved.

[0039] As a preferred technical solution of this application, see [reference]. Figure 3 The first pressing component includes a stacking table 21, and the second pressing component includes a pressing table 22, with the stacking table 21 disposed below the pressing table 22. Furthermore, the driving assembly includes a first driving member 23 and a second driving member 24, wherein the power output end of the first driving member 23 is connected to the stacking table 21, and the power output end of the second driving member 24 is connected to the pressing table 22.

[0040] Based on this structure, after the diaphragm belt 40 arrives at the pressing station, the electrode is precisely placed on the stacking table 21 by an automated feeding device. The stacking table 21 provides a stable and horizontal support plane for the electrode placement. Once the electrode is placed, the first drive unit 23 and the second drive unit 24 begin to operate. The first drive unit 23 drives the stacking table 21 upwards, while the second drive unit 24 drives the pressing table 22 downwards. During their opposing movements, the diaphragm belt 40 is sandwiched between the electrode and the pressing table 22, while the electrode is subjected to pressure from the stacking table 21. By precisely controlling the movement speed and stroke of the first drive unit 23 and the second drive unit 24, it can be ensured that pressure is applied evenly to the diaphragm belt 40 and the electrode during the pressing process.

[0041] During electrode placement, the flatness and positional stability of the stacking platform 21 ensure that the electrode accurately contacts and aligns with the diaphragm belt 40, preventing the electrode from being placed crookedly or not tightly adhered to the diaphragm belt 40. Meanwhile, the pressure platform 22 applies pressure from above, cooperating with the stacking platform 21 to achieve bidirectional compression of the diaphragm belt 40 and the electrode, resulting in more uniform and tighter pressing.

[0042] Furthermore, both the first drive element 23 and the second drive element 24 can be driven by electric push rods, cylinders, servo motors, or combinations of ball screws. The first drive element 23 and the second drive element 24 control the movement of the stacking stage 21 and the pressing stage 22 respectively, providing greater operational flexibility through independent drive.

[0043] As a preferred embodiment of this application, the stacking stage 21 is provided with a first mounting block 25, and a negative pressure generator is provided inside the first mounting block 25. The negative pressure generator is used to create a negative pressure on the surface of the first mounting block 25 to adsorb the electrode sheets. In addition, the pressing stage 22 is provided with a second mounting block 26, and the surface of the second mounting block 26 is used to adhere to the diaphragm belt 40.

[0044] Based on this structure, after the diaphragm belt 40 is guided by the unwinding mechanism to the top of the stacking table 21, the negative pressure generator inside the first mounting block 25 of the stacking table 21 is activated; the negative pressure generator starts working, causing a negative pressure area to be quickly formed on the surface of the first mounting block 25. Then, the electrode is transferred to the top of the stacking table 21 by the automated feeding equipment. Due to the negative pressure on the surface of the first mounting block 25, the electrode will be firmly adsorbed on the surface of the first mounting block 25.

[0045] The first mounting block 25 is provided with an air intake hole. The negative pressure generator can be a vacuum pump, fan or other existing technology. It draws out or blows away the air near the surface of the first mounting block 25 through the air intake hole, so that the air pressure in the area is lower than the outside atmospheric pressure, thereby generating negative pressure on the adsorption electrode.

[0046] Therefore, by setting a negative pressure generator on the stacking stage 21, the adsorption force generated by the negative pressure generator can ensure that the electrode does not shift or shake during placement, and can quickly fix the electrode in the accurate position when it is placed, which greatly improves the alignment accuracy between the electrode and the diaphragm belt 40.

[0047] As a preferred embodiment of this application, the upper surface of the first mounting block 25 is formed as a first heating surface 251, and the lower surface of the second mounting block 26 is formed as a second heating surface. Furthermore, the pressing mechanism 20 includes a first heating element 27 and a second heating element 28, wherein the first heating element 27 is used to heat the first heating surface 251, and the first heating surface 251 is used to heat the electrode sheet. Similarly, the second heating element 28 is used to heat the second heating surface, and the second heating surface is used to heat the diaphragm strip 40. Thus, the first mounting block 25 and the second mounting block 26 are used to thermally press the electrode sheet and the diaphragm strip 40 together after they come close to each other.

[0048] Based on this structure, the first driving member 23 drives the stacking stage 21 to move upward, and the second driving member 24 drives the pressing stage 22 to move downward. During the opposing movement, as the stacking stage 21 and the pressing stage 22 gradually approach each other, the electrode and the diaphragm belt 40 gradually come into contact. At the same time, under the heating of the first heating surface 251 and the heating of the diaphragm belt 40 on the second heating surface, the two undergo thermal pressing under the combined action of pressure and heat.

[0049] The first heating element 27 and the second heating element 28 can both be heating tubes, and the first mounting block 25 and the second mounting block 26 can both conduct heat. Specifically, the mounting blocks can be made of metal materials with high thermal conductivity, such as copper blocks, and then the copper blocks are heated to about 85°C through the heating tubes.

[0050] Therefore, by pressing and heating the electrode and the separator tape 40, the contact between the electrode and the separator tape 40 becomes tighter. After heating, the separator tape 40 adheres more closely to the electrode surface, reducing interfacial gaps and thus improving the bonding quality between the electrode and the separator tape 40.

[0051] As a preferred technical solution of this application, see [reference]. Figure 3 A clamping assembly 30 is provided on one side of the pressing station. Specifically, the clamping assembly 30 includes a third driving member 31 and two clamping arms 32 arranged opposite to each other. The third driving member 31 is used to drive the two clamping arms 32 to move closer to each other or further away from each other, so that the clamping arms 32 clamp or release the diaphragm belt 40.

[0052] Based on this structure, during the rotation of the unwinding mechanism, the third drive component 31 of the clamping assembly 30 is in its initial state. At this time, the two opposing clamping arms 32 are far apart, leaving sufficient space for the introduction of the diaphragm belt 40. When the diaphragm belt 40 is output from the unwinding mechanism and guided along guide rollers and other guiding devices to the vicinity of the pressing station, the diaphragm belt 40 is in a freely movable state, ready to enter the subsequent operation stage.

[0053] When the diaphragm belt 40 needs to be thermally pressed with the electrode, the third drive unit 31 starts to work, driving the two clamping arms 32 to move closer to each other and clamp the diaphragm belt 40. During the clamping process, the third drive unit 31 ensures that the diaphragm belt 40 is firmly clamped and kept stable in the specified position by precisely controlling the magnitude of the driving force, without damaging the diaphragm material due to over-clamping.

[0054] During the placement of the electrode sheets on the stacking table 21 and the subsequent hot pressing process, the clamping arms 32 remain clamped. When the hot pressing operation is completed and the diaphragm belt 40 needs to move forward to the next process, the third drive unit 31 operates again, driving the two clamping arms 32 to move away from each other, releasing the clamp on the diaphragm belt 40. After being released, the clamping arms 32 return to their initial far-away position, ready for the next clamping operation.

[0055] The third driving component 31 can be a combination of an electric push rod, a cylinder, a servo motor, and a ball screw. The inner side of the clamping arm 32 can be provided with an arc-shaped or planar structure that matches the shape of the diaphragm belt 40, and the surface is wrapped with an elastic material (such as rubber or silicone) to avoid damage to the diaphragm belt 40 during clamping, thus ensuring the integrity and quality of the diaphragm belt 40, extending its service life, and reducing production costs.

[0056] Therefore, by clamping with the clamping arm 32, the diaphragm belt 40 can be fixed in a predetermined position, ensuring that the electrode and the diaphragm belt 40 are aligned with each other, thus improving product consistency and yield. In addition, the stable position of the diaphragm belt 40 also helps to ensure a uniform pressing effect, preventing uneven pressing or defects such as air bubbles and wrinkles between the electrode and the diaphragm belt 40 caused by movement or vertical shifting of the diaphragm belt 40.

[0057] Furthermore, before reaching the clamping assembly 30, the diaphragm belt 40 passes through an electrostatic eliminator 18 to eliminate static electricity. Specifically, the electrostatic eliminator 18 can be a conventional electrostatic eliminator bar or an inductive electrostatic eliminator 18. Since the static electricity has been eliminated, the diaphragm belt 40 will not experience phenomena detrimental to production, such as adsorption of dust and impurities, or electrostatic adsorption or repulsion with other components, when it is subsequently clamped by the clamping arm 32 and participates in subsequent electrode placement and pressing processes.

[0058] As a preferred technical solution of this application, see [reference]. Figure 4 The unwinding mechanism includes an unwinding assembly and a guiding assembly. Specifically, the unwinding assembly is used to wind up the diaphragm belt 40, while the guiding assembly is used to receive the diaphragm belt 40 released by the unwinding assembly, so as to guide the diaphragm belt 40 into the pressing station in a taut state.

[0059] Based on this structure, before production begins, the diaphragm roll is first mounted on the unwinding assembly. Specifically, the unwinding assembly typically includes a rotatable shaft, to which the diaphragm roll is fixed in a suitable manner (such as via an air shaft) to ensure stable rotation with the shaft. At this time, the guiding assembly is in its initial position, with its various guide rollers and other components adjusted in spacing and angle, ready to receive the diaphragm belt 40 released from the unwinding assembly.

[0060] When the unwinding assembly starts, its shaft rotates under the drive of a motor or other power source, gradually releasing the diaphragm belt 40 from the diaphragm roll. Specifically, the diaphragm belt 40 can be drawn to the bottom of the pressure table 22 according to the diaphragm belt path diagram 17 on the frame 10. More specifically, the released diaphragm belt 40 first contacts the starting guide roller of the guiding assembly. The function of this guide roller is to change the lead-out direction of the diaphragm belt 40, allowing it to smoothly enter the subsequent guide roller sequence of the guiding assembly. Subsequently, the diaphragm belt 40 is sequentially conveyed along a series of guide rollers of the guiding assembly. These guide rollers work together to form a specific conveying path for the diaphragm belt 40.

[0061] Thus, after being tensioned and precisely guided by the guiding component, the diaphragm belt 40 enters the pressing station in a stable state. At this point, the position, tension, and flatness of the diaphragm belt 40 meet the requirements for the pressing operation, enabling it to be bonded to the electrode sheet and undergo subsequent hot pressing processes. Throughout the production process, the unwinding component and the guiding component work continuously in tandem. The unwinding component continuously releases the diaphragm belt 40 according to the production schedule, while the guiding component consistently ensures the tension and correct transmission of the diaphragm belt 40 to meet the demands of continuous production.

[0062] As a preferred embodiment of this application, the unwinding assembly includes a fourth driving member 12 and a mounting shaft 11. Specifically, the fourth driving member 12 drives the mounting shaft 11, which is used to mount the diaphragm roll. Furthermore, the guiding assembly includes a swing shaft assembly 13. Specifically, the swing shaft assembly 13 includes a fifth driving member 131, a swing shaft 132, and a first sensor 133. The fifth driving member 131 drives the swing shaft 132 to swing, thereby adjusting the tension of the diaphragm belt 40. Additionally, the first sensor 133 detects the swing amplitude of the swing shaft 132.

[0063] Based on this structure, the mounting shaft 11 can be an air-expanding shaft. In use, the air-expanding shaft is first deflated, and the diaphragm roll is placed inside. The air-expanding shaft then inflates, causing its surface to expand and tightly grip the inner core of the diaphragm roll. The fourth drive shaft then drives the air-expanding shaft to rotate, causing the diaphragm roll fixed on it to rotate in a set direction, thereby gradually releasing the diaphragm belt 40 from the diaphragm roll. The diaphragm belt 40 is then guided to the pressing station via guide rollers, the swing shaft 132, etc.

[0064] The swing shaft assembly 13 further includes a swing frame 134, on which the swing shaft 132 and the first sensor 133 are both connected. The swing frame 134 is oscillatingly connected to the frame 10 via a rotating shaft. The power output shaft of the aforementioned fifth drive component 131 is connected to the rotating shaft to drive the rotating shaft to rotate, thereby causing the swing frame 134 to swing, which in turn causes the swing shaft 132 on the swing frame 134 to swing. The first sensor 133 can be an angle sensor, rotary encoder, or other similar devices as described in the prior art.

[0065] Thus, as production progresses, the tension of the diaphragm belt 40 will change due to various factors, such as fluctuations in the unwinding speed and changes in the diameter of the diaphragm roll. When the tension changes, it causes the swing shaft 132 to swing. For example, if the tension of the diaphragm belt 40 decreases, the swing shaft 132 will swing in a certain direction to a certain extent under the action of gravity or other external forces. At this time, the first sensor 133 will immediately detect the swing amplitude of the swing shaft 132 and feed back the signal. The manual or control system determines the current tension of the diaphragm belt 40 based on the swing amplitude signal, and then sends a command to the fifth drive unit 131. The fifth drive unit 131 drives the swing shaft 132 to swing in the opposite direction according to the command, thereby applying an additional tension or resistance to the diaphragm belt 40 by changing the angle of the swing shaft 132, thereby adjusting the tension of the diaphragm belt 40 and restoring it to the set appropriate range.

[0066] Therefore, the fourth drive component 12, in conjunction with the mounting shaft 11, provides a stable and controllable power source for the unwinding of the separator roll. This ensures that the separator tape 40 is unwound from the separator roll at a uniform speed, avoiding problems such as wrinkles, overstretching, or accumulation of the separator tape 40 caused by inconsistent unwinding speeds. Furthermore, the swing shaft assembly 13 allows for precise tension adjustment of the separator tape 40, ensuring that the tension remains within a suitable range. It avoids being too loose, which could lead to wrinkles or displacement during pressing, and also avoids being too tight, which could cause stretching, deformation, or even breakage. This effectively prevents a series of problems caused by inappropriate tension, such as poor adhesion between the separator tape 40 and the electrode, air bubbles, and impaired battery electrochemical performance, significantly improving product quality and consistency.

[0067] As a preferred technical solution of this application, the guiding component further includes a buffer component. Specifically, the buffer component includes a buffer shaft 14, a sixth driving member 141, and a second sensor 142. The sixth driving member 141 is used to drive the buffer shaft 14 to move laterally so that the buffer shaft 14 buffers the diaphragm belt 40. The second sensor 142 is used to detect the position of the buffer shaft 14 and generate a first electrical signal, and the fourth driving member 12 starts and stops according to the first electrical signal.

[0068] Based on this structure, the diaphragm belt 40 unwound from the mounting shaft 11 is guided to the pressing station after passing over guide rollers, swing shaft 132, and buffer shaft 14. In use, the sixth drive unit 141 drives the buffer shaft 14 to move laterally, for example, to the left, thereby buffering the diaphragm belt 40. Simultaneously, the sixth drive unit 141 drives the buffer shaft 14 to move to the right, thereby releasing the diaphragm belt 40. The second sensor 142 synchronously detects the movement distance of the buffer shaft 14. The second sensor 142 can be a photoelectric sensor or an ultrasonic sensor, etc.

[0069] It should be noted that during the automatic unwinding process, the unwinding speed of the unwinding component and the speed required by the diaphragm belt 40 in subsequent pressing and other processes are often difficult to synchronize precisely, and the buffer component plays a buffering role.

[0070] Specifically, when the unwinding speed is relatively fast, the sixth drive component 141 drives the buffer shaft 14 to move to the left, buffering excess diaphragm tape 40. This prevents the diaphragm tape 40 from accumulating at the unwinding end, thus preventing wrinkles, deformation, or entanglement of the diaphragm tape 40 into other components that could affect production. When subsequent processes require faster speeds and the unwinding speed cannot keep up, the buffer shaft 14 moves to the right to release the previously buffered diaphragm tape 40. This ensures a continuous and stable supply of diaphragm tape 40 to subsequent stages such as the pressing station, allowing the entire production process to operate smoothly without frequent interruptions or quality issues due to speed differences. This effectively improves production efficiency and product quality stability.

[0071] In addition, see Figure 2 and Figure 4 The buffer assembly also includes a movable base 143 and a guide rail 144. The movable base 143 is slidably connected to the guide rail 144, the buffer shaft 14 is connected to the movable base 143, and the power output end of the sixth drive component 141 is connected to the movable base 143. The sixth drive component 141 can be a combination of an electric actuator, a cylinder, a servo motor, and a ball screw. The sixth drive component 141 drives the movable base 143 to slide on the guide rail 144, thereby causing the buffer shaft 14 to buffer or release the diaphragm belt 40.

[0072] As a preferred technical solution of this application, see [reference]. Figure 1 and Figure 2The frame 10 includes a mounting frame 101 and a fixing frame 102. The unwinding mechanism is mounted on the mounting frame 101, and the mounting frame 101 and the fixing frame 102 are slidably engaged. Furthermore, the guiding assembly includes a correction assembly, specifically a seventh drive member 15, a third sensor 33, and a fourth sensor 34. The power output end of the seventh drive member 15 is connected to the mounting frame 101. The third sensor 33 detects the deviation of the diaphragm belt 40 and generates a second electrical signal when the sixth drive member 141 drives the buffer shaft 14 to move in the reverse direction. The seventh drive member 15 starts and stops according to the second electrical signal to adjust the relative position of the mounting frame 101 and the fixing frame 102. The fourth sensor 34 detects the moving distance of the mounting frame 101.

[0073] Based on this structure, before the device is used, the mounting frame 101 and the fixing frame 102 are in their initial relative positions, the unwinding mechanism is mounted on the mounting frame 101, and the seventh drive unit 15 is in standby mode. During use, when the sixth drive unit 141 drives the buffer shaft 14 to move in the reverse direction (e.g., to the right) to release the diaphragm belt 40, the diaphragm belt 40 may deviate from the predetermined path, causing the relative position of the diaphragm belt 40 and the electrode to be misaligned. At this time, the third sensor 33 begins to function, which detects the position of the diaphragm belt 40 in real time. Once the diaphragm belt 40 is detected to be deviated, a second electrical signal is generated. The generated second electrical signal is transmitted to the control system, which determines the direction and degree of deviation of the diaphragm belt 40 based on the signal. Then, the control system sends a command to the seventh drive unit 15, which starts and drives the mounting frame 101 to move back and forth relative to the fixing frame 102 according to the command, so that the diaphragm belt 40 is aligned with the electrode.

[0074] During the movement of the mounting bracket 101, the fourth sensor 34 detects the moving distance of the mounting bracket 101 in real time and feeds the data back to the control system. Based on the feedback from the fourth sensor 34, the control system precisely controls the movement of the mounting bracket 101 to ensure that it can accurately correct the diaphragm belt 40 to the appropriate position. At the same time, the third sensor 33 continuously monitors the position of the diaphragm belt 40. Once it detects that the diaphragm belt 40 has returned to the correct path, it stops generating the second electrical signal. At this time, the seventh drive unit 15 receives the stop signal and stops driving the mounting bracket 101, completing one correction operation.

[0075] The third sensor 33 and the fourth sensor 34 can both be photoelectric sensors or ultrasonic sensors, etc. The seventh driving component 15 can be a combination of an electric push rod, a cylinder, a servo motor and a ball screw, etc. The fixed frame 102 is provided with a slide rail 103, and the mounting frame 101 is provided with a corresponding slide groove. The slide groove is connected to the slide rail 103. When the seventh driving component 15 is activated, it can drive the mounting frame 101 to slide on the slide rail 103, thereby adjusting the relative position of the mounting frame 101 and the fixed frame 102, and thus adjusting the relative position of the diaphragm belt 40 and the electrode.

[0076] Therefore, by correcting the deviation of the separator strip 40 in a timely manner, the separator strip 40 can be accurately attached to the electrode, thereby improving the quality and consistency of the battery product.

[0077] As a preferred technical solution of this application, the unwinding mechanism further includes a roll changing assembly, which is disposed between the unwinding assembly and the guiding assembly. Specifically, the roll changing assembly includes a pressure table, an eighth drive member 160, a ninth drive member 161, a first pressure belt 162, and a second pressure belt 163. The first pressure belt 162 is mounted on the pressure table and forms a first holding interval 1621 with the pressure table. The second pressure belt 163 is mounted on the pressure table and forms a second holding interval 1631 with the pressure table. A connecting interval is formed between the first pressure belt 162 and the second pressure belt 163.

[0078] The eighth driving member 160 is used to drive the first pressing belt 162 to move to press the new diaphragm belt 40 in the first pressing interval 1621, and the ninth driving member 161 is used to drive the second pressing belt 163 to move to press the old diaphragm belt 40 in the second pressing interval 1631, so that the new diaphragm belt 40 and the old diaphragm belt 40 are connected within the connection interval.

[0079] Based on this structure, when the fifth sensor 19 on the frame 10 detects that the old diaphragm roll on the unwinding assembly is almost used up, the equipment prepares to perform a roll change operation. At this time, the new diaphragm roll has been installed on the corresponding mounting shaft 11, and the new diaphragm belt 40 has been drawn out and placed in the first holding interval 1621, while the old diaphragm belt 40 is introduced into the second holding interval 1631.

[0080] During roll changing, the ninth drive unit 161 starts working, driving the second pressure belt 163 to move towards the pressure table, gradually bringing it closer until it presses the old diaphragm belt 40 within the second pressing interval 1631. Simultaneously, the eighth drive unit 160 also starts, driving the first pressure belt 162 towards the pressure table, pressing the new diaphragm belt 40 within the first pressing interval 1621. After the first and second pressure belts 162 and 163 respectively press the new and old diaphragm belts 40, the new and old diaphragm belts 40 can be connected within the connecting interval using methods such as adhesive bonding or heat pressing.

[0081] After the new and old diaphragm belts 40 are successfully connected, the eighth drive component 160 and the ninth drive component 161 drive the first pressure belt 162 and the second pressure belt 163 in reverse, moving them away from the pressure table and releasing the pressure on the diaphragm belt 40. At this time, the connected diaphragm belt 40 continues to be conveyed to the pressing station along the predetermined path under the coordinated action of the unwinding assembly and the guiding assembly. The entire production process resumes normal operation, realizing roll changing without stopping the machine and ensuring the continuity of production.

[0082] The fifth sensor 19 can be a color mark sensor, which determines the usage status of the diaphragm roll by detecting a specific color mark. The eighth drive unit 160 and the ninth drive unit 161 can both be driven by a combination of electric push rod, cylinder, servo motor and ball screw, etc.

[0083] Therefore, this roll-changing assembly can quickly and effectively connect the new diaphragm belt 40 to the old diaphragm belt 40 when the old diaphragm roll is used up, so that production can continue uninterrupted, minimizing the production downtime caused by roll changing and improving overall production efficiency and capacity.

[0084] In addition, the fourth drive component 12, the fifth drive component 131 and the seventh drive component 15 can be electric motors, hydraulic motors or pneumatic motors, etc.

[0085] In summary, the automatic unwinding and pressing device for the diaphragm in this application achieves automatic unwinding of the diaphragm belt 40 through the unwinding mechanism. During the unwinding process, the swing shaft assembly 13 and the buffer assembly in the guiding component effectively cope with various production changes, ensuring a continuous and stable supply of the diaphragm belt 40 and further improving production efficiency. The alignment component ensures the relative alignment of the electrode sheet and the diaphragm belt 40, and the pressing mechanism 20 enables the electrode sheet and the diaphragm belt 40 to automatically complete the pressing operation, improving production speed and ensuring the quality stability of each pressing, reducing quality fluctuations caused by human factors.

[0086] The technical means disclosed in this application are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. An automatic unwinding and pressing device for diaphragms, characterized in that: include, A frame, wherein a pressing station is provided on the frame; An unwinding mechanism is rotatably connected to the frame and is used to output the diaphragm belt during rotation and guide the diaphragm belt to the pressing station; A pressing mechanism is provided at the pressing station; the pressing mechanism includes a driving component, a first pressing component and a second pressing component, the first pressing component and the second pressing component being disposed opposite to each other; the driving component drives the first pressing component and the second pressing component to move closer to each other, so that the first pressing component and the second pressing component press the diaphragm strip and the electrode sheet together.

2. The automatic unwinding and pressing device for diaphragms according to claim 1, characterized in that: The first pressing component includes a stacking platform, and the second pressing component includes a pressing platform, with the stacking platform disposed below the pressing platform; the driving assembly includes a first driving component and a second driving component, with the power output end of the first driving component connected to the stacking platform and the power output end of the second driving component connected to the pressing platform.

3. The automatic unwinding and pressing device for diaphragms according to claim 2, characterized in that: The stacking platform is provided with a first mounting block, and the first mounting block is provided with a negative pressure generator. The negative pressure generator is used to form a negative pressure on the surface of the first mounting block to adsorb the electrode sheet. The pressing platform is provided with a second mounting block, and the surface of the second mounting block is used to adhere to the diaphragm tape.

4. The automatic unwinding and pressing device for diaphragms according to claim 3, characterized in that: The upper surface of the first mounting block is formed as a first heating surface, and the lower surface of the second mounting block is formed as a second heating surface; the pressing mechanism includes a first heating element and a second heating element, the first heating element is used to heat the first heating surface, and the first heating surface is used to heat the electrode sheet; the second heating element is used to heat the second heating surface, and the second heating surface is used to heat the diaphragm tape; the first mounting block and the second mounting block are used to thermally press the electrode sheet and the diaphragm tape together after approaching the pressing station.

5. The automatic unwinding and pressing device for diaphragms according to any one of claims 1-4, characterized in that: A clamping assembly is provided on one side of the pressing station. The clamping assembly includes a third driving member and two clamping arms arranged opposite each other. The third driving member is used to drive the two clamping arms to move closer to each other or further away from each other, so that the clamping arms clamp or release the diaphragm belt.

6. The automatic unwinding and pressing device for diaphragms according to claim 1, characterized in that: The unwinding mechanism includes an unwinding assembly and a guiding assembly. The unwinding assembly is used to wind up the diaphragm tape. The guiding assembly is used to receive the diaphragm tape released by the unwinding assembly to guide the diaphragm tape into the pressing station in a taut state.

7. The automatic unwinding and pressing device for diaphragms according to claim 6, characterized in that: The unwinding assembly includes a fourth driving member and a mounting shaft. The fourth driving member is used to drive the mounting shaft, and the mounting shaft is used to mount the diaphragm roll. The guiding assembly includes a swing shaft assembly, which includes a fifth driving member, a swing shaft, and a first sensor. The fifth driving member is used to drive the swing shaft to swing so that the swing shaft adjusts the tension of the diaphragm belt. The first sensor is used to detect the swing amplitude of the swing shaft.

8. The automatic unwinding and pressing device for diaphragms according to claim 7, characterized in that: The guiding component includes a buffer component, which includes a buffer axis, a sixth driving element, and a second sensor. The sixth driving element is used to drive the buffer axis to move laterally so that the buffer axis buffers the diaphragm strip. The second sensor is used to detect the position of the buffer axis and generate a first electrical signal, and the fourth drive unit starts and stops according to the first electrical signal.

9. The automatic unwinding and pressing device for diaphragms according to claim 8, characterized in that: The frame includes a mounting frame and a fixed frame. The unwinding mechanism is mounted on the mounting frame, and the mounting frame and the fixed frame are slidably engaged. The guiding assembly includes a correction assembly, which includes a seventh drive member, a third sensor, and a fourth sensor. The power output end of the seventh drive member is connected to the mounting frame. The third sensor is used to detect the deviation of the diaphragm belt and generate a second electrical signal when the sixth drive member drives the buffer shaft to move in the opposite direction. The seventh drive member starts and stops according to the second electrical signal to adjust the relative position of the mounting frame and the fixed frame. The fourth sensor is used to detect the moving distance of the mounting frame.

10. The automatic unwinding and pressing device for diaphragms according to claim 6, characterized in that: The unwinding mechanism includes a roll-changing assembly disposed between the unwinding assembly and the guiding assembly. The roll-changing assembly includes a pressure table, an eighth drive member, a ninth drive member, a first pressure belt, and a second pressure belt. The first pressure belt is mounted on the pressure table and spaced apart from the pressure table to form a first holding interval. The second pressure belt is mounted on the pressure table and spaced apart from the pressure table to form a second holding interval. A connecting interval is formed between the first pressure belt and the second pressure belt. The eighth drive member is used to drive the first pressure belt to move to hold a new diaphragm belt in the first holding interval. The ninth drive member is used to drive the second pressure belt to move to hold an old diaphragm belt in the second holding interval, so that the new diaphragm belt and the old diaphragm belt are connected within the connecting interval.

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