Separator tension control device and stacking machine

Abstract

A separator tension control device (100), comprising a buffering mechanism (110) and a tension holding mechanism (120), wherein the tension holding mechanism (120) comprises a first tension roller (121), a second tension roller (122) and a drive assembly (123), the first tension roller (121) and the second tension roller (122) are spaced apart in a first direction, and an uncoiled separator material belt (11) swings back and forth in the first direction after passing through the tension holding mechanism (120), such that Z-shaped laying is carried out on a stacking table (200); the separator material belt (11) alternately abuts against the first tension roller (121) and the second tension roller (122) in a reciprocating swing process so as to be tensioned, and the magnitude of a support force acting on the separator material belt (11) by the first tension roller (121) and the second tension roller (122) can be adjusted by the drive assembly (123), such that a tension degree of the separator material belt (11) is adjusted. By controlling the support force of the first tension roller (121) and the second tension roller (122) in real time, a tension degree of the separator material belt (11) can be controlled to maintain preset tension, such that the tension of the separator material belt (11) can be well maintained. Also provided is a stacking machine (10) having the separator tension control device (100).

Description

Diaphragm tension control device and lamination machine Technical Field

[0001] The present application relates to the technical field of lithium battery equipment, and in particular to a diaphragm tension control device and a laminating machine. Background Art

[0002] Z-shaped lamination is a common process for preparing lithium battery cells. By moving the separator strip back and forth to achieve Z-shaped folding, and alternating the positive and negative electrode sheets between the Z-shaped separator strips, the battery cell is formed. The separator strips must maintain tension after unwinding to ensure they remain taut. During the lamination process, the separator strips must be folded by moving back and forth. Changes in the position of the separator strips can lead to redundancy or shortages, resulting in constantly changing separator strip tension. Unstable separator strip tension can lead to wrinkles and inward shrinkage in the separator, affecting the quality of the battery cell.

[0003] Application Contents

[0004] Based on this, it is necessary to provide a diaphragm tension control device and a laminating machine that can maintain the stable tension of the diaphragm strip to address the above problems.

[0005] A diaphragm tension control device includes a tension maintaining mechanism, wherein the tension maintaining mechanism includes a first tension roller, a second tension roller, and a drive assembly, and a diaphragm material strip passing through the diaphragm tension control device can pass between the first tension roller and the second tension roller;

[0006] In which, the diaphragm material strip can be supported by the first tension roller and the second tension roller during the reciprocating swing along the first direction, the driving component can provide the first tension roller and the second tension roller with a supporting force acting on the diaphragm material strip, and the supporting force provided by the driving component is adjustable to tighten the diaphragm material strip and maintain a preset tension.

[0007] In one embodiment, the tension maintaining mechanism further includes a mounting bracket, a first swing arm and a second swing arm, one end of the first swing arm and the second swing arm are rotatably mounted on the mounting bracket, and the other end is respectively mounted with the first tension roller and the second tension roller, and the driving assembly transmits the supporting force to the first tension roller and the second tension roller respectively through the first swing arm and the second swing arm.

[0008] In one embodiment, the driving assembly includes a first driving member and a second driving member, wherein the first driving member and the second driving member are respectively connected to the first swing arm and the second swing arm, and provide supporting force for the first tension roller and the second tension roller respectively.

[0009] In one embodiment, a swing roller mechanism is further included, which is arranged downstream of the tension maintaining mechanism. The diaphragm material strip output by the tension maintaining mechanism can pass through the swing roller mechanism. The swing roller mechanism can move back and forth along the first direction and drive the diaphragm material strip to swing back and forth along the first direction.

[0010] In one embodiment, a tension sensor is further included, wherein the tension sensor is capable of detecting the tension of the diaphragm material strip passing through the tension maintaining mechanism.

[0011] In one embodiment, a buffer mechanism is further included on the upstream side of the tension maintaining mechanism, and the buffer mechanism is capable of buffering or releasing the diaphragm material strip.

[0012] In one embodiment, it also includes an unwinding mechanism and a tensioning mechanism, wherein the tensioning mechanism is located between the unwinding mechanism and the cache mechanism, the unwinding mechanism can unwind the diaphragm material strip, and the tensioning mechanism can tension the diaphragm material strip between the unwinding mechanism and the cache mechanism.

[0013] In one embodiment, the tensioning mechanism includes a base, a rocker arm and a tensioning roller, one end of the rocker arm is rotatably mounted on the base, the tensioning roller is mounted on the end of the rocker arm away from the base, and the diaphragm material strip can pass around the tensioning roller.

[0014] In one embodiment, a tension isolating mechanism is further included between the cache mechanism and the tensioning mechanism. The diaphragm material strip passes through the tension isolating mechanism, and the tension isolating mechanism is capable of isolating the tension of the diaphragm material strip between the cache mechanism and the tensioning mechanism.

[0015] In one embodiment, the tension-breaking mechanism includes a main drive roller and a pressure roller, and the diaphragm material strip can pass through and be clamped between the main drive roller and the pressure roller. The main drive roller can provide driving force to transport the diaphragm material strip to the cache mechanism.

[0016] A laminating machine, comprising:

[0017] A diaphragm tension control device as described in any one of the above preferred embodiments; and

[0018] Lamination table;

[0019] The diaphragm material strip output by the tension maintaining mechanism can swing back and forth along the first direction relative to the lamination table, so that the diaphragm material strip is laid in a Z shape on the lamination table.

[0020] In the above-mentioned diaphragm tension control device and stacking machine, the unwound diaphragm strip swings back and forth in the first direction after passing through the tension maintaining mechanism, thereby being laid in a Z-shape on the stacking table. Moreover, during the reciprocating swing, the diaphragm strip will alternately abut against the first tension roller and the second tension roller, thereby being tensioned. The magnitude of the supporting force exerted by the first tension roller and the second tension roller on the diaphragm strip can be adjusted by the drive component, thereby adjusting the tension of the diaphragm strip. It can be seen that by controlling the supporting force of the first tension roller and the second tension roller in real time, the preset tension can be maintained by controlling the tension of the diaphragm strip. Therefore, the above-mentioned diaphragm tension control device and stacking machine can better maintain the stability of the tension of the diaphragm strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] FIG1 is a partial structural diagram of a laminating machine in a preferred embodiment of the present application;

[0023] FIG2 is a schematic structural diagram of a diaphragm tension control device in the laminating machine shown in FIG1 ;

[0024] FIG3 is a schematic structural diagram of a tension maintaining mechanism in the diaphragm tension control device shown in FIG2 ;

[0025] FIG4 is a top view of the tension maintaining mechanism shown in FIG3 . DETAILED DESCRIPTION

[0026] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0029] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] 1 , the present application provides a laminating machine 10 and a diaphragm tension control device 100 . The laminating machine 10 includes the diaphragm tension control device 100 and a laminating table 200 .

[0033] The diaphragm tension control device 100 is used to deliver a diaphragm strip 11 to the lamination table 200. The diaphragm strip 11 delivered by the diaphragm tension control device 100 can swing back and forth in a first direction relative to the lamination table 200, so that the diaphragm strip 11 is laid out in a Z-shape on the lamination table 200. Simultaneously, a lamination robot (not shown) can also alternately place positive and negative electrode sheets on the diaphragm strip 11 of the lamination table 200, folding the diaphragm strip 11 each time a sheet is placed, so that adjacent sheets are separated by the diaphragm strip 11. This operation is repeated until the required number of stacked sheets is reached, completing the preparation of a battery cell. The diaphragm strip 11 laid out on the lamination table 200 is then folded into a "Z" shape.

[0034] During the lamination process, the lamination platform 200 can remain stationary while the membrane tension control device 100 drives the membrane strip 11 to reciprocate in the first direction. Obviously, in other embodiments, the membrane tension control device 100 can also remain stationary while the lamination platform 200 reciprocates in the first direction to drive the membrane strip 11 to complete the Z-shaped laying.

[0035] Please also refer to FIG. 2 . The diaphragm tension control device 100 in the preferred embodiment of the present application includes a buffer mechanism 110 and a tension maintaining mechanism 120 .

[0036] The membrane strip 11 used for lamination can sequentially pass through the buffer mechanism 110 and the tension maintaining mechanism 120. The buffer mechanism 110 can buffer or release the membrane strip 11. The buffer mechanism 110 generally includes multiple buffer rollers 111, and the relative positions of the multiple buffer rollers 111 can be adjusted. The membrane strip 11 passing through the buffer mechanism 110 can be sequentially wound around the multiple buffer rollers 111. The multiple buffer rollers 111 can buffer or release the membrane strip 11 by changing their relative positions.

[0037] If there is a redundancy in the membrane strip 11, the buffer mechanism 110 can buffer the excess membrane strip 11. If there is a shortage of membrane strip 11, the buffer mechanism 110 can release membrane strip 11 to compensate for the shortage. This prevents the membrane strip 11 from becoming loose or breaking. Obviously, in other embodiments, if the fluctuation of the membrane strip 11 during actual operation is minimal, the buffer mechanism 110 can be omitted.

[0038] 3 and 4 , the tension maintaining mechanism 120 includes a first tension roller 121 , a second tension roller, and a driving assembly 123 . The membrane strip 11 passing through the tension maintaining mechanism 120 can pass between the first tension roller 121 and the second tension roller 122 .

[0039] During the lamination process, the membrane strip 11 is delivered by the tension-maintaining mechanism 120 and laid in a Z-shape on the lamination table 200. During this process, the membrane strip 11 reciprocates in a first direction relative to the lamination table 200 and between the first tension roller 121 and the second tension roller 122. Furthermore, during this reciprocating swing, the membrane strip 11 is supported by the first tension roller 121 and the second tension roller 122, thereby keeping the membrane strip 11 taut.

[0040] In this embodiment, the diaphragm tension control device 100 also includes a swing roller mechanism 170, which is arranged downstream of the tension maintaining mechanism 120. The diaphragm material strip 11 output by the tension maintaining mechanism 120 can pass through the swing roller mechanism 170. The swing roller mechanism 170 can move back and forth along the first direction and drive the diaphragm material strip 11 to swing back and forth along the first direction.

[0041] Specifically, the swing roller mechanism 170 generally includes two opposing nip rollers. The membrane strip 11 delivered by the tension maintaining mechanism 120 passes between the two nip rollers. As the swing roller mechanism 170 reciprocates in a first direction, it drives the membrane strip 11 to swing back and forth in the first direction, achieving a Z-shaped fold. This allows the lamination table 200 to maintain its position during the lamination process.

[0042] Furthermore, the drive assembly 123 can provide support force for the first tension roller 121 and the second tension roller 122 to act on the diaphragm material strip 11. The support force provided by the drive assembly 123 is adjustable to tighten the diaphragm material strip 11 and maintain a preset tension. When the diaphragm material strip 11 swings toward the first tension roller 121, the first tension roller 121 can abut against the diaphragm material strip 11 and tighten it; when the diaphragm material strip 11 swings toward the second tension roller 122, the second tension roller 122 can abut against the diaphragm material strip 11 and tighten it.

[0043] Taking Figure 2 as an example, the first direction refers to the left and right direction. The first tension roller 121 is located on the left and the second tension roller 122 is located on the right, and the diaphragm strip 11 swings left and right during the lamination process. When the diaphragm strip 11 swings to the left, the first tension roller 121 can abut against the diaphragm strip 11 and tension it; when the diaphragm strip 11 swings to the right, the second tension roller 122 can abut against the diaphragm strip 11 and tension it. Moreover, the first tension roller 121 and the second tension roller 122 can move under the drive of the drive assembly 123, thereby adjusting the tensioning degree of the diaphragm strip 11. Therefore, by controlling the supporting force of the first tension roller 121 and the second tension roller 122 in real time, the preset tension can be maintained by controlling the tensioning degree of the diaphragm strip 11.

[0044] More specifically, when the diaphragm material strip 11 swings to the left and is tensioned by the first tension roller 121, if it is detected that the tension of the diaphragm material strip 11 is greater than the preset tension, the driving component 123 can reduce the supporting force of the first tension roller 121 on the diaphragm material strip 11, thereby reducing the tensioning degree of the diaphragm material strip 11, so that the tension of the diaphragm material strip 11 is reduced and approaches the preset tension; if it is detected that the tension of the diaphragm material strip 11 is less than the preset tension, the driving component 123 can increase the supporting force of the first tension roller 121 on the diaphragm material strip 11, thereby increasing the tensioning degree of the diaphragm material strip 11, so that the tension of the diaphragm material strip 11 is increased and approaches the preset tension.

[0045] Similarly, when the diaphragm material strip 11 swings to the right and is tensioned by the second tension roller 122, if it is detected that the tension of the diaphragm material strip 11 is greater than the preset tension, the driving component 123 can reduce the supporting force of the second tension roller 122 on the diaphragm material strip 11, thereby reducing the tension on the diaphragm material strip 11; and if it is detected that the tension of the diaphragm material strip 11 is less than the preset tension, the driving component 123 can increase the supporting force of the second tension roller 122 on the diaphragm material strip 11, thereby increasing the tension on the diaphragm material strip 11.

[0046] Specifically, in this embodiment, the diaphragm tension control device 100 further includes a tension sensor 130 capable of detecting the tension of the diaphragm web 11 passing through the tension maintaining mechanism 120. The tension sensor 130 can monitor the tension of the diaphragm web 11 in real time, thereby facilitating the drive assembly 123 to dynamically adjust the supporting force of the first tension roller 121 and the second tension roller 122 based on the real-time tension, thereby precisely controlling the tension of the diaphragm web 11.

[0047] Furthermore, if the diaphragm strip 11 becomes redundant or insufficient during its swinging process, the buffer mechanism 110 can buffer or release the diaphragm strip 11, thereby preventing the diaphragm strip 11 from becoming loose or breaking. Thus, with the cooperation of the buffer mechanism 110 and the tension-maintaining mechanism 120, the tension of the diaphragm strip 11 can be maintained stable during the lamination process, thereby preventing problems such as wrinkling or shrinkage of the diaphragm strip 11 and improving the quality of the battery cell.

[0048] In this embodiment, the tension maintaining mechanism 120 also includes a mounting bracket 124, a first swing arm 125 and a second swing arm 126. One end of the first swing arm 125 and the second swing arm 126 are rotatably mounted on the mounting bracket 124, and the other end is respectively mounted with a first tension roller 121 and a second tension roller 122. The driving component 123 transmits the supporting force to the first tension roller 121 and the second tension roller 122 through the first swing arm 125 and the second swing arm 126.

[0049] Specifically, the mounting bracket 124 is provided with a first rotating shaft 127 and a second rotating shaft 128 that are parallel to each other, and the first swing arm 125 and the second swing arm 126 are respectively mounted on the first rotating shaft 127 and the second rotating shaft 128. The first rotating shaft 127 and the second rotating shaft 128 can rotate around their own axes, thereby allowing the first swing arm 125 and the second swing arm 126 to swing.

[0050] In this way, the positions of the first tension roller 121 and the second tension roller 122 can also be changed under the influence of the separator strip 11. For example, when the tension of the separator strip 11 suddenly increases, the reaction force exerted by the separator strip 11 on the first tension roller 121 and the second tension roller 122 will be greater than the supporting force, forcing the first tension roller 121 and the second tension roller 122 to retreat, thereby acting as a buffer and preventing the separator strip 11 from breaking. Moreover, the retreat of the first tension roller 121 and the second tension roller 122 drives the first swing arm 125 and the second swing arm 126 to swing, and the movement trajectory of the first tension roller 121 and the second tension roller 122 is circular, thereby reducing the friction between the first tension roller 121 and the second tension roller 122 and the separator strip 11.

[0051] Specifically, in this embodiment, the first tension roller 121 and the second tension roller 122 are rotatably mounted on the first swing arm 125 and the second swing arm 126, respectively, and are capable of rotating about their respective axes. Thus, when the first tension roller 121 and the second tension roller 122 abut against the diaphragm strip 11, they can roll along the surface of the diaphragm strip 11, thereby preventing scratches on the diaphragm strip 11.

[0052] Furthermore, in this embodiment, the driving assembly 123 includes a first driving member 1231 and a second driving member 1232. The first driving member 1231 and the second driving member 1232 are respectively connected to the first swing arm 125 and the second swing arm 126, and provide support force for the first tension roller 121 and the second tension roller 122 respectively.

[0053] Since the first driving member 1231 and the second driving member 1232 can provide supporting force for the first tension roller 121 and the second tension roller 122 respectively, the supporting force of the first tension roller 121 and the second tension roller 122 acting on the diaphragm material strip 11 can be controlled and adjusted individually, thereby improving the accuracy of tension control for the diaphragm material strip 11.

[0054] Specifically, both the first and second drive members 1231, 1232 can be pneumatic cylinders and controlled in real time by an electrical proportional valve. A control electrical signal can be generated based on the real-time tension of the diaphragm strip 11. The electrical proportional valve can control the air intake and exhaust of the cylinders based on this control electrical signal, thereby adjusting the supporting force provided by the first and second drive members 1231, 1232 to the first and second tension rollers 121, 122 in real time to ensure that the diaphragm strip 11 maintains the preset tension. It should be noted that in other embodiments, the first and second drive members 1231, 1232 can also be springs, which generate the supporting force provided to the first and second tension rollers 121, 122 through pre-compression. Furthermore, by controlling the pre-compression of the springs in real time, the supporting force of the first and second tension rollers 121, 122 can be adjusted.

[0055] Referring again to FIG. 2 , in this embodiment, the diaphragm tension control device 100 further includes an unwinding mechanism 140 and a tensioning mechanism 150 . The tensioning mechanism 150 is located between the unwinding mechanism 140 and the buffer mechanism 110 . The unwinding mechanism 140 can unwind the diaphragm strip 11 , and the tensioning mechanism 150 can tighten the diaphragm strip 11 between the unwinding mechanism 140 and the buffer mechanism 110 .

[0056] The unwinding mechanism 140 may include an expansion shaft, on which the roll of the membrane material strip 11 may be pre-clamped. The tensioning mechanism 150 can maintain a certain tension on the membrane material strip 11 unwound by the unwinding mechanism 140 to ensure a smooth unwinding process.

[0057] Furthermore, in this embodiment, the tensioning mechanism 150 includes a base 151, a rocker arm 152 and a tensioning roller 153. One end of the rocker arm 152 is rotatably mounted on the base 151, and the tensioning roller 153 is mounted on the end of the rocker arm 152 away from the base 151. The diaphragm material strip 11 can pass around the tensioning roller 153.

[0058] The rocker arm 152 can be connected to components such as a cylinder and an elastic member, thereby applying a pre-tightening force to the tensioning roller 153 so that the tensioning roller 153 tensions the diaphragm material strip 11 .

[0059] In this embodiment, the diaphragm tension control device 100 also includes a tension isolation mechanism 160 located between the cache mechanism 110 and the tensioning mechanism 150. The diaphragm material strip 11 passes through the tension isolation mechanism 160, and the tension isolation mechanism 160 can isolate the tension of the diaphragm material strip 11 between the cache mechanism 110 and the tensioning mechanism 150.

[0060] In other words, the tension of the diaphragm strip 11 on either side of the tension isolation mechanism 160 can differ. The tension isolation mechanism 160 can isolate the unwinding tension, preventing tension fluctuations during the unwinding process from being transmitted to the isolation buffer mechanism 110 and the tension maintaining mechanism 120. This prevents tension fluctuations during the unwinding process from interfering with the diaphragm strip 11 during the lamination process, thereby further improving the stability of the tension of the diaphragm strip 11 during the lamination process.

[0061] Specifically, in this embodiment, the tension isolation mechanism 160 includes a main drive roller 161 and a pressure roller 162. The diaphragm material strip 11 can pass through and be clamped between the main drive roller 161 and the pressure roller 162. The main drive roller 161 can provide driving force to transport the diaphragm material strip 11 to the cache mechanism 110.

[0062] The clamping force between the main drive roller 161 and the pressure roller 162 effectively separates the two sides of the membrane strip 11, thereby isolating the unwinding tension. Furthermore, driven by the main drive roller 161, the membrane strip 11 is smoothly conveyed to the buffer mechanism 110, thereby continuously supplying the membrane strip 11 for the lamination process.

[0063] In addition, the diaphragm tension control device 100 generally further includes a large plate 180 . Components such as the buffer mechanism 110 , the tension maintaining mechanism 120 , the tension sensor 130 , the unwinding mechanism 140 , the tensioning mechanism 150 , and the tension interrupting mechanism 160 can all be mounted on the large plate 180 .

[0064] In the above-mentioned diaphragm tension control device 100 and stacking machine 10, the unwound diaphragm strip 11 swings back and forth in the first direction after passing through the tension maintaining mechanism 120, thereby being laid in a Z-shape on the stacking table. Moreover, during the reciprocating swing, the diaphragm strip 11 will alternately abut against the first tension roller 121 and the second tension roller 122, thereby being tensioned. The magnitude of the supporting force exerted by the first tension roller 121 and the second tension roller 122 on the diaphragm strip 11 can be adjusted by the drive component 123, thereby adjusting the tension of the diaphragm strip 11. Therefore, by controlling the supporting force of the first tension roller 121 and the second tension roller 122 in real time, the preset tension can be maintained by controlling the tension of the diaphragm strip 11, so that the tension of the diaphragm strip 11 can be better maintained stable.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A diaphragm tension control device, characterized in that: It includes a tension holding mechanism, the tension holding mechanism includes a first tension roller, a second tension roller and a driving assembly, and the diaphragm material strip passing through the diaphragm tension control device can pass between the first tension roller and the second tension roller; Wherein, the diaphragm material strip can be supported by the first tension roller and the second tension roller during the reciprocating swing along the first direction, the driving component can provide the first tension roller and the second tension roller with supporting force acting on the diaphragm material strip, and the supporting force provided by the driving component is adjustable to tighten the diaphragm material strip and maintain a preset tension.

2. The diaphragm tension control device according to claim 1, characterized in that: The tension maintaining mechanism also includes a mounting bracket, a first swing arm and a second swing arm, one end of the first swing arm and the second swing arm are rotatably mounted on the mounting bracket, and the other end is respectively mounted with the first tension roller and the second tension roller, and the driving component transmits the supporting force to the first tension roller and the second tension roller respectively through the first swing arm and the second swing arm.

3. The diaphragm tension control device according to claim 2, characterized in that: The driving assembly includes a first driving member and a second driving member, wherein the first driving member and the second driving member are respectively connected to the first swing arm and the second swing arm, and respectively provide supporting force for the first tension roller and the second tension roller.

4. The diaphragm tension control device according to claim 1, characterized in that: It also includes a swing roller mechanism, which is arranged downstream of the tension maintaining mechanism. The diaphragm material strip output by the tension maintaining mechanism can pass through the swing roller mechanism. The swing roller mechanism can move back and forth along the first direction and drive the diaphragm material strip to swing back and forth along the first direction.

5. The diaphragm tension control device according to claim 1, characterized in that: It also includes a tension sensor capable of detecting the tension of the diaphragm material strip passing through the tension maintaining mechanism.

6. The diaphragm tension control device according to any one of claims 1 to 5, characterized in that: It also includes a buffer mechanism located on the upstream side of the tension maintaining mechanism, and the buffer mechanism can buffer or release the diaphragm material strip.

7. The diaphragm tension control device according to claim 6, characterized in that: It also includes an unwinding mechanism and a tensioning mechanism, wherein the tensioning mechanism is located between the unwinding mechanism and the cache mechanism, the unwinding mechanism can unwind the diaphragm material strip, and the tensioning mechanism can tension the diaphragm material strip between the unwinding mechanism and the cache mechanism.

8. The diaphragm tension control device according to claim 7, characterized in that: The tensioning mechanism includes a base, a rocker arm and a tensioning roller. One end of the rocker arm is rotatably mounted on the base. The tensioning roller is mounted on one end of the rocker arm away from the base. The diaphragm material strip can pass around the tensioning roller.

9. The diaphragm tension control device according to claim 7, characterized in that: It also includes a tension isolating mechanism located between the cache mechanism and the tensioning mechanism, the diaphragm material strip passes through the tension isolating mechanism, and the tension isolating mechanism can isolate the tension of the diaphragm material strip between the cache mechanism and the tensioning mechanism.

10. The diaphragm tension control device according to claim 9, characterized in that: The tension isolation mechanism includes a main driving roller and a pressure roller, and the diaphragm material strip can pass through and be clamped between the main driving roller and the pressure roller. The main driving roller can provide a driving force to transport the diaphragm material strip to the buffer mechanism.

11. A laminating machine, characterized in that: include: A diaphragm tension control device as claimed in any one of claims 1 to 10; and Lamination table; The diaphragm material strip output by the tension maintaining mechanism can swing back and forth along the first direction relative to the lamination table, so that the diaphragm material strip can be laid in a Z shape on the lamination table.

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