Composite roller pressing mechanism and composite roller pressing system

Abstract

The application discloses a composite roller pressing mechanism and a composite roller pressing system, which comprise a roller pressing support, a driving roller rotatably supported on the roller pressing support, a driving roller driving device for driving the driving roller to rotate, a pressing assembly and a driven roller rotatably supported on an output end of the pressing assembly, the pressing assembly being used for driving the driven roller to move close to and away from the driving roller, and a parallelism adjusting device used for adjusting limit positions of two ends of the driven roller, which face one side of the driving roller. The parallelism adjusting device can adjust the limit positions of the two ends of the driven roller, so that when the driven roller cannot keep parallel with the driving roller, the parallelism adjusting device of one end of the driven roller is adjusted, the driven roller can keep parallel with the driving roller, different positions of the driving roller and the driven roller have the same composite pressure, and the composite degrees of different areas of an electrode sheet and a diaphragm are consistent.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a composite rolling mechanism and composite rolling system. Background Technology

[0002] A battery generally consists of a battery casing and a cell housed inside the casing. The cell is the core component of the battery and is composed of a positive electrode, a negative electrode, a separator, and an electrolyte. The bonding of the electrode plates (positive and negative electrodes) and the separator is a crucial step in battery manufacturing, playing a decisive role in the overall performance, safety, and lifespan of the battery.

[0003] As an insulating material, the separator separates the positive and negative electrodes, preventing direct contact between the two electrodes and thus avoiding short circuits, thereby ensuring the safety and stability of the battery. The separator has a microporous structure; when combined with the electrode plates, these micropores provide channels for the directional movement of ions during charging and discharging, allowing for smooth ion conduction within the battery and ensuring normal electrochemical energy conversion.

[0004] Currently, electrode sheets and diaphragms are bonded together using composite roller pressing technology. The side of the diaphragm facing the electrode sheet has an adhesive layer, which allows the electrode sheet and diaphragm to adhere together during the bonding process. Existing composite roller pressing mechanisms include a driving roller and a driven roller. After the electrode sheet and diaphragm pass between the driving roller and the driven roller, they are pressed together by both. However, when the driven roller is pressed against the driving roller, the driven roller is not parallel to the driving roller. This results in different composite pressures at different positions of the driving and driven rollers along the axial direction, leading to inconsistent bonding between the electrode sheet and the diaphragm, ultimately affecting the winding effect.

[0005] Therefore, how to ensure the parallelism of the active roller and the passive roller in order to form a relatively uniform composite pressure on the electrode sheet and the diaphragm is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this application is to provide a composite roller pressing mechanism to ensure the parallelism of the active roller and the passive roller, so as to form a more uniform composite pressure on the electrode sheet and the diaphragm.

[0007] Another objective of this application is to provide a composite rolling system having the above-described composite rolling mechanism.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] The first aspect of this application provides a composite rolling mechanism, comprising:

[0010] Roller support;

[0011] The active roller is rotatably supported on the roller support;

[0012] An active roller drive device is mounted on the roller support and is used to drive the active roller to rotate;

[0013] A pressure-applying component and a passive roller, wherein the passive roller is rotatably supported at the output end of the pressure-applying component, and the pressure-applying component is used to drive the passive roller to move closer to and away from the active roller;

[0014] A parallelism adjustment device is installed on the roller support and is used to adjust the extreme positions of both ends of the passive roller on the side facing the active roller.

[0015] The composite roller pressing mechanism provided in this application has a floating passive roller, which can be driven by the pressure applying component to move closer to and away from the active roller. Before the electrode sheet and diaphragm are laminated in this composite roller pressing mechanism, in order to facilitate the entry of the electrode sheet and diaphragm between the active roller and the passive roller, the pressure applying component drives the passive roller to move away from the active roller, thereby increasing the distance between the active roller and the passive roller. After the electrode sheet and diaphragm enter between the active roller and the passive roller, the pressure applying component drives the passive roller to move closer to the active roller, so that the electrode sheet and diaphragm are pressed together between the active roller and the passive roller. As the active roller driving device drives the active roller to rotate, the electrode sheet and diaphragm are pressed together.

[0016] The roller press support is equipped with a parallelism adjustment device, which can adjust the extreme positions of both ends of the passive roller. This allows the passive roller to move closer to the driving roller when the pressure application component moves it. If the passive roller cannot maintain parallelism with the driving roller, adjusting the parallelism adjustment device at one end of the passive roller—that is, adjusting the extreme position of one end—can ensure that the passive roller remains parallel to the driving roller. This ensures that different positions on both the driving and passive rollers have the same composite pressure, guaranteeing consistent bonding between the electrode sheet and different areas of the diaphragm.

[0017] A second aspect of this application provides a composite rolling system comprising two composite rolling mechanisms, wherein the composite rolling mechanism is as described in any of the preceding claims;

[0018] One of the composite rolling mechanisms is used for the composite of the positive electrode and the separator, and the other composite rolling mechanism is used for the composite of the negative electrode and the separator.

[0019] The composite roll forming system provided in this application has all the technical effects of the aforementioned composite roll forming mechanism, which will not be elaborated further here. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the working process of the composite roller pressing mechanism disclosed in the embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the composite roller pressing mechanism disclosed in an embodiment of this application at one angle;

[0023] Figure 3 This is a schematic diagram of the composite roller pressing mechanism disclosed in the embodiments of this application from another angle;

[0024] Figure 4 This is a schematic diagram of the composite roller pressing mechanism disclosed in the embodiments of this application after removing the motor mounting bracket;

[0025] Figure 5 This is a front view of the composite roller pressing mechanism disclosed in the embodiments of this application.

[0026] The meanings of the various reference numerals in the figure are as follows:

[0027] 100-Composite roller pressing mechanism; 101-Active roller; 102-Passive roller; 103-Roll pressing support; 1031-Support top frame; 1032-Support side frame; 10321-Allowing groove; 104-Active roller drive device; 105-Pressure application drive device; 106-Pressure application support; 1061-Pressure application main support; 1062-Pressure application side support; 107-Pressure regulating valve; 108-Parallelism adjusting seat; 109-Slide rail assembly; 1091-Slide rail body; 1092-Slide groove body;

[0028] 200-electrode sheet;

[0029] 300-diaphragm. Detailed Implementation

[0030] This application discloses a composite roller pressing mechanism to ensure the parallelism of the active roller and the passive roller, so as to form a relatively uniform composite pressure on the electrode sheet and the diaphragm.

[0031] This application also discloses a composite rolling system having the above-described composite rolling mechanism.

[0032] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the application as described in the claims. Additionally, the complete composition represented in the embodiments below is not limited to what is necessary as the solution to the application described in the claims. It should be noted that, for ease of description, only the parts relevant to the application are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0033] like Figures 1-3 As shown in the illustration, this application discloses a composite rolling mechanism 100, which is used to composite the electrode sheet 200 and the diaphragm 300, enabling the electrode sheet 200 and the diaphragm 300 to be bonded together. The diaphragm 300 can be a diaphragm 300 with adhesive backing, which bonds the diaphragm 300 to the electrode sheet 200. Alternatively, the diaphragm 300 can be without adhesive backing, and adhesive can be applied to the surface of the diaphragm 300 facing the electrode sheet 200 before composite bonding, thereby achieving bonding between the electrode sheet 200 and the diaphragm 300.

[0034] The composite roller pressing mechanism 100 disclosed in this application includes a roller pressing support 103, an active roller 101, a passive roller 102, an active roller driving device 104, a pressing component, and a parallelism adjustment device.

[0035] The roller pressing bracket 103 provides a mounting base for other devices of the composite roller pressing mechanism 100, allowing these devices to be directly or indirectly mounted on the roller pressing bracket 103. This embodiment does not limit the shape of the roller pressing bracket 103; its shape and structure should be designed based on the spatial relationships of the other devices of the composite roller pressing mechanism 100, so that these devices can be installed in their respective positions.

[0036] The drive roller 101 is rotatably supported on the roller pressing bracket 103. Specifically, both ends of the drive roller 101 are rotatably supported on the roller pressing bracket 103 via bearings. The roller pressing bracket 103 may include two support side frames 1032 to support both ends of the drive roller 101.

[0037] Two support side frames 1032 are arranged in parallel and spaced apart. One end of the drive roller 101 can be supported on one of the support side frames 1032 by a bearing, and the other end of the drive roller 101 can be supported on the other support side frame 1032 by a bearing. The drive roller 101 generally includes a drive roller body and a drive roller shaft. The drive roller body is mounted on the drive roller shaft, and both ends of the drive roller shaft can be supported on the support side frame 1032 by corresponding bearings.

[0038] The active roller drive device 104 is mounted on the roller support 103 and is used to drive the active roller 101 to rotate. The active roller drive device 104 can be a servo motor, and the output shaft of the active roller drive device 104 is connected to the active roller 101 to drive the active roller 101 to rotate around its own axis.

[0039] To facilitate the installation of the active roller drive device 104 on the roller pressing bracket 103, the active roller drive device 104 can be mounted on the roller pressing bracket 103 via a motor mounting bracket 110. The housing portion of the active roller drive device 104 can be fixed to the motor mounting bracket 110, which in turn is fixed to the roller pressing bracket 103, for example, to the support side frame 1032 of the roller pressing bracket 103. If the output shaft of the active roller drive device 104 is directly connected to the active roller 101, the fixed position of the motor mounting bracket 110 must be ensured so that the output shaft of the active roller drive device 104 is coaxial with the active roller 101. In this embodiment, the motor mounting bracket 110 provides space for the connection between the output shaft of the active roller drive device 104 and the active roller 101, allowing them to be directly connected via a coupling, or via other transmission components, such as a gear mechanism.

[0040] The passive roller 102 is rotatably supported at the output end of the pressure application component, which drives the passive roller 102 to move closer to and further away from the active roller 101. The pressure application component is a linear displacement drive device, which can drive the passive roller 102 to move linearly.

[0041] The composite roller pressing mechanism 100 disclosed in this application embodiment has a passive roller 102 that is a floating roller. Under the action of the pressure applying component, the passive roller 102 can move closer to and further away from the active roller 101. The pressure applying component can control the movement direction of the passive roller 102 according to needs. Before the composite roller pressing mechanism 100 combines the electrode sheet 200 and the diaphragm 300, in order to facilitate the electrode sheet 200 and the diaphragm 300 to enter between the active roller 101 and the passive roller 102, the pressure applying component drives the passive roller 102 to move away from the active roller 101, thereby increasing the distance between the active roller 101 and the passive roller 102, which facilitates the placement of the electrode sheet 200 and the diaphragm 300 between the active roller 101 and the passive roller 102.

[0042] After the electrode sheet 200 and the diaphragm 300 enter between the active roller 101 and the passive roller 102, the pressure application component drives the passive roller 102 to move closer to the active roller 101, so that the electrode sheet 200 and the diaphragm 300 are pressed together between the active roller 101 and the passive roller 102. As the active roller 101 is driven by the drive device to rotate, the electrode sheet 200 and the diaphragm 300 are pressed together.

[0043] A parallelism adjustment device is mounted on the roller support 103 and is used to adjust the extreme positions of both ends of the passive roller 102 facing the driving roller 101. That is, the parallelism adjustment device can adjust the extreme positions of both ends of the passive roller 102. This allows the parallelism adjustment device to adjust the extreme positions of both ends of the passive roller 102 when the pressure assembly moves the passive roller 102 closer to the driving roller 101. This ensures that if the passive roller 102 cannot maintain parallelism with the driving roller 101, the extreme position of one end of the passive roller 102 can be adjusted, thus allowing the passive roller 102 to remain parallel to the driving roller 101.

[0044] It should be noted that the limit position refers to the boundary position that a structural component can reach within its range of motion. In this embodiment, it refers to the boundary position that the end of the passive roller 102 can reach within its range of motion.

[0045] The passive roller 102 can move closer to and further away from the active roller 101 under the action of the pressure application component. When the passive roller 102 moves closer to the active roller 101, the parallelism adjustment device can limit the lower boundary position of the end of the passive roller 102 (taking the passive roller 102 on top and the active roller 101 on the bottom as an example). That is, the end of the passive roller 102 will be limited by the parallelism adjustment device, preventing the corresponding end of the passive roller 102 from continuing to move closer to the active roller 101.

[0046] For example, if the left end of the passive roller 102 is lower than the right end, making it impossible for the passive roller 102 to remain parallel to the active roller 101, the height of the parallelism adjustment device at the left end of the passive roller 102 can be increased so that the passive roller 102 can remain parallel to the active roller 101 when both ends of the passive roller 102 abut against the parallelism adjustment device. Alternatively, the height of the parallelism adjustment device at the right end of the passive roller 102 can be decreased so that the passive roller 102 can remain parallel to the active roller 101 when both ends of the passive roller 102 abut against the parallelism adjustment device. By adjusting the parallelism adjustment device, the extreme positions at both ends of the passive roller 102 can be adjusted, thereby adjusting the parallelism between the passive roller 102 and the active roller 101, so that different positions of the active roller 101 and the passive roller 102 have the same composite pressure, ensuring that the degree of composite between the electrode sheet 200 and different areas of the diaphragm 300 is consistent.

[0047] It should be noted that in actual use, the two ends of the passive roller 102 can be left unattached to the parallelism adjustment device. That is, when the active roller 101 and the passive roller 102 can remain parallel, the parallelism adjustment device can be discontinued. In other words, when the passive roller 102 is in the pressing position, the end of the passive roller 102 can still maintain a certain gap with the parallelism adjustment device, meaning the parallelism adjustment device is not activated.

[0048] Taking the passive roller 102 located above the active roller 101 as an example, when the passive roller 102 is tilted and cannot remain parallel to the active roller 101, it is only necessary to adjust the parallelism adjustment device corresponding to the lower end of the active roller 101. This will cause the lower end of the passive roller 102 to abut against the parallelism adjustment device when the passive roller 102 is pressed down, preventing the left end of the passive roller 102 from lowering further. Since the right end is not restricted by the parallelism adjustment device, it can continue to lower until the passive roller 102 is parallel to the active roller 101.

[0049] In one specific embodiment of this application, at least one parallelism adjustment device is provided at both ends of the passive roller 102. For ease of understanding, the plane containing the axis of the active roller 101 and the axis of the passive roller 102 is defined as the reference plane.

[0050] With a parallelism adjustment device installed at the end of the passive roller 102, the device is positioned on a reference plane between the driving roller 101 and the passive roller 102. This configuration limits the extreme position of the parallelism adjustment device to directly below the moving direction of the passive roller 102 (when the driving roller 101 is below the passive roller 102, the extreme position is directly below the moving direction of the passive roller 102; if the driving roller 101 is above the passive roller 102, the extreme position is directly above the moving direction of the passive roller 102). When the passive roller 102 moves towards the driving roller 101 under the drive of the pressure application component, its end presses against the parallelism adjustment device. Since the parallelism adjustment device is located on the reference plane, it remains supported on the axis of the passive roller 102, ensuring stability and preventing uneven force distribution and skewing of the passive roller 102 due to eccentric support.

[0051] When multiple parallelism adjustment devices are correspondingly provided at the end of the passive roller 102 ( Figure 3 The scheme shown is that there are two parallelism adjustment devices at each end of the passive roller 102, and each parallelism adjustment device is set on both sides of the reference plane and located between the active roller 101 and the passive roller 102.

[0052] With this configuration, the limit position limited by the parallelism adjustment device is located directly below the moving direction of the passive roller 102 (when the active roller 101 is below the passive roller 102, the limit position limited by the parallelism adjustment device is directly below the moving direction of the passive roller 102; if the active roller 101 is above the passive roller 102, the limit position limited by the parallelism adjustment device is directly above the moving direction of the passive roller 102). In this embodiment, multiple parallelism adjustment devices are correspondingly provided at the end of the passive roller 102. Each parallelism adjustment device jointly supports the end of the passive roller 102. Therefore, a corresponding plate needs to be provided at the end of the passive roller 102 to achieve the effect of jointly supporting the end of the passive roller 102 through the support plate.

[0053] Each parallelism adjustment device is set on both sides of the reference plane. When the passive roller 102 is driven by the pressure application component to move towards the active roller 101, the end of the passive roller 102 will press against each parallelism adjustment device. This can keep the parallelism adjustment device supported on both sides of the passive roller 102, ensure the stability of the support, and prevent the passive roller 102 from being tilted due to uneven force caused by eccentric support.

[0054] The number of parallelism adjustment devices corresponding to the first end of the passive roller 102 is n, and the number of parallelism adjustment devices corresponding to the second end of the passive roller 102 is m, where m and n are both positive integers, and m ≥ n. That is, in this embodiment, the number of parallelism adjustment devices at the first end of the passive roller 102 can be equal to the number of parallelism adjustment devices at the second end of the passive roller 102. For example, the number of parallelism adjustment devices at both ends of the passive roller 102 can be one, two, or other numbers. Of course, the number of parallelism adjustment devices at both ends of the passive roller 102 can also be unequal. For example, the number of parallelism adjustment devices at the first end of the passive roller 102 can be one, while the number of parallelism adjustment devices at the second end of the passive roller 102 can be two. Alternatively, multiple parallelism adjustment devices can be provided at both ends of the passive roller 102, but the number can be different.

[0055] In a specific embodiment of this application, the parallelism adjustment device includes a parallelism adjustment seat 108 and a lifting device (not shown in the figure). The parallelism adjustment seat 108 is disposed on the roller pressing bracket 103. Specifically, the parallelism adjustment seat 108 can be fixed to the roller pressing bracket 103 by fasteners, or it can be designed as an integral structure with the roller pressing bracket 103, or it can be fixed to the roller pressing bracket 103 by welding or other connection methods. This embodiment does not limit the fixing relationship between the parallelism adjustment seat 108 and the roller pressing bracket 103.

[0056] The lifting device is mounted on the parallelism adjusting seat 108, and the end of the lifting device facing the passive roller 102 is the limiting end that restricts the extreme position of the passive roller 102. The lifting device can adjust the height of the end facing the passive roller 102 by lifting, thereby adjusting the extreme position of the end of the passive roller 102.

[0057] The lifting device can be an adjusting screw, and an adjusting screw hole is provided on the parallelism adjusting seat 108. The adjusting screw is threadedly engaged with the adjusting screw hole. In this embodiment, the lifting device is designed as an adjusting screw. By rotating the adjusting screw, the height of the end of the adjusting screw facing the passive roller 102 can be changed, thereby adjusting the distance between the end of the adjusting screw and the end of the passive roller 102, and thus adjusting the limit position of the end of the passive roller 102.

[0058] If the passive roller 102 cannot remain parallel to the active roller 101 because its left end is lower and its right end is higher, the adjusting screw corresponding to the left end of the passive roller 102 can be rotated to raise the end face of the adjusting screw facing the passive roller 102, thereby raising the extreme position of the left end of the passive roller 102, so that the passive roller 102 can remain parallel to the active roller 101.

[0059] Alternatively, by rotating the adjusting screw corresponding to the right end of the passive roller 102, the end face of the adjusting screw facing the passive roller 102 can be lowered, thereby lowering the extreme position of the right end of the passive roller 102, so that the passive roller 102 can remain parallel to the active roller 101.

[0060] In this embodiment, the extreme position of the passive roller 102 end can be easily adjusted by adjusting the screw, thereby making it easier to adjust the parallelism between the passive roller 102 and the active roller 101, so that different positions of the active roller 101 and the passive roller 102 have the same composite pressure, ensuring that the degree of composite between the electrode sheet 200 and different areas of the diaphragm 300 is consistent.

[0061] It should be noted that the height of the ends of the adjusting screws at both ends of the passive roller 102 does not necessarily have to be on the same plane. When the wear of the roller surfaces of the active roller 101 and the passive roller 102 is different, the height of the corresponding ends of the passive roller 102 can also be adjusted by adjusting the adjusting screws to keep the pressing force of the active roller 101 and the passive roller 102 uniform.

[0062] like Figure 2 , Figure 4 and Figure 5As shown in a specific embodiment of this application, the pressure application assembly may include a pressure driving device 105 and a pressure support 106. The pressure driving device 105 is disposed on the roller pressing support 103, and the pressure support 106 is connected to the output end of the pressure driving device 105. The pressure driving device 105 drives the pressure support 106 to move closer to and further away from the active roller 101, and the passive roller 102 is rotatably supported on the pressure support 106. The roller pressing support 103 may include a support top frame 1031, which may be fixed to the top of two support side frames 1032. The pressure driving device 105 may be fixed to the support top frame 1031.

[0063] In this embodiment, the pressure driving device 105 can output linear displacement, and the pressure support 106 is connected to the output end of the pressure driving device 105, so that the pressure driving device 105 can drive the pressure support 106 to move linearly. The passive roller 102 is rotatably supported on the pressure support 106, so the pressure driving device 105 can drive the passive roller 102 to move linearly through the pressure support 106. With this configuration, only one pressure driving device 105 is needed to drive both ends of the passive roller 102 to move synchronously. Compared with the prior art, which requires two pressure driving devices 105 for both ends of the passive roller 102, one pressure driving device 105 is reduced, thus reducing equipment costs. At the same time, with only one pressure driving device 105, it is easier to maintain the synchronicity of both ends of the passive roller 102 compared to two pressure driving devices 105. It can also prevent the passive roller 102 from being non-parallel to the driving roller 101 due to asynchronous movement of the two ends of the passive roller 102.

[0064] When there is only one pressure driving device 105, the output end of the pressure driving device 105 can be connected to the middle of the pressure support 106 to keep the driving force on both ends of the passive roller 102 the same. This ensures that when the pressure driving device 105 drives the pressure support 106 to move, the force exerted by the pressure support 106 on both ends of the passive roller 102 is the same, thus ensuring the smooth movement of the passive roller 102 and preventing the passive roller 102 from deflecting due to uneven force on both ends.

[0065] In this embodiment, the pressure driving device 105 can be a pressure cylinder, and a pressure regulating valve 107 can be installed in the air circuit of the pressure cylinder. The pressure regulating valve 107 can adjust the output pressure of the pressure cylinder, so that when the two ends of the passive roller 102 move to abut against the parallelism adjusting device, as the pressure cylinder continues to drive the passive roller 102 to move in the direction of the active roller 101, the pressure in the air circuit of the pressure cylinder gradually increases until it reaches the pressure relief pressure of the pressure regulating valve 107. At this point, the pressure regulating valve 107 releases pressure, so that the pressure output by the pressure cylinder is maintained at the calibrated pressure of the pressure regulating valve 107. This embodiment is equipped with a pressure regulating valve 107, which makes the pressure in the air circuit of the pressure cylinder adjustable. Those skilled in the art can adjust the output pressure of the pressure cylinder as needed, so that the pressure of the active roller 101 and the passive roller 102 acting on the electrode sheet 200 and the diaphragm 300 can be satisfied to combine the electrode sheet 200 and the diaphragm 300 together, while avoiding damage to the electrode sheet 200 and the diaphragm 300 due to excessive pressure output by the pressure cylinder.

[0066] In one specific embodiment of this application, the pressure-applying support may include a main pressure-applying support 1061 and pressure-applying side supports 1062 disposed at both ends of the main pressure-applying support 1061. The two ends of the passive roller 102 are rotatably supported on the two pressure-applying side supports 1062 respectively. The passive roller 102 generally includes a passive roller body and a passive roller shaft. The passive roller body is disposed on the passive roller shaft, and the two ends of the passive roller shaft can be supported on the pressure-applying side supports 1062 respectively through corresponding bearings.

[0067] like Figure 3 As shown, the main support bracket 1061 is driven by the pressure driving device 105 to perform lifting and lowering actions. The support side frame 1032 should be provided with a clearance groove 10321 to avoid interference between the main support bracket 1061 and the support side frame 1032 during the lifting and lowering process.

[0068] The parallelism adjustment device is used to adjust the limit position of the pressure-side support 1062. That is, each pressure-side support 1062 is equipped with a parallelism adjustment device to limit the limit position of the pressure-side support 1062, thereby adjusting the limit position of the corresponding end of the passive roller 102. Thus, when the two ends of the passive roller 102 are at different heights, the limit position of the higher end of the passive roller 102 can be lowered, or the limit position of the lower end of the passive roller 102 can be raised, so that the passive roller 102 and the driving roller 101 remain parallel.

[0069] like Figure 3As shown in a specific embodiment of this application, the pressure-side support 1062 and the roller support 103 can be slidably engaged by the slide rail assembly 109 to limit the movement direction of the pressure-side support 1062, so that the pressure-side support 1062 can move back and forth in a predetermined direction, preventing the passive roller 102 from tilting during the movement, thus affecting the parallelism between the passive roller 102 and the active roller 101.

[0070] The slide rail assembly 109 may include a slide rail body 1091 and a slide groove body 1092 that are slidably engaged. One of the slide rail body 1091 and the slide groove body 1092 is disposed on the pressure-applying side bracket 1062, and the other is disposed on the roller pressing bracket 103. For example, the slide groove body 1092 is disposed on the pressure-applying side bracket 1062, and the slide rail body 1091 is disposed on the roller pressing bracket 103.

[0071] To maintain smoothness, the slide rail assembly 109 may include multiple cooperating slide rail bodies 1091 and slide groove bodies 1092, taking two slide rail bodies 1091 and two slide groove bodies 1092 as an example. The two slide groove bodies 1092 of the slide rail assembly 109 corresponding to any end of the passive roller 102 may be symmetrically arranged on both sides of the axis of the passive roller 102 to maintain smooth sliding.

[0072] In one specific embodiment of this application, the active roller 101 is a metal pressure roller, and the passive roller 102 is a rubber pressure roller. The active roller 101 can be made of metal materials such as steel to give it high strength and hardness. During the lamination process, the active roller 101 needs to provide power to drive the movement of the electrode sheet 200 and the diaphragm 300, and must withstand certain pressure and friction. The metal pressure roller can maintain its shape stability under high-speed operation and high pressure, and is not easily deformed, ensuring the smooth progress of the lamination process.

[0073] In this embodiment, the passive roller 102 is designed as a rubber roller. The rubber roller has excellent elasticity. When the active roller 101 and the passive roller 102 are in a lamination operation, the passive roller 102 can deform to better fit with the active roller 101, thereby providing uniform pressure across the entire contact surface. This ensures that the electrode sheet 200 and the diaphragm 300 can fully adhere, guaranteeing the lamination effect. Simultaneously, the elasticity of the passive roller 102 also acts as a buffer, reducing the impact force on the electrode sheet 200 and the diaphragm 300 during the lamination process, preventing damage due to excessive pressure. The high friction of the rubber material of the passive roller 102 helps it better follow the movement of the active roller 101, ensuring that the electrode sheet 200 and the diaphragm 300 move synchronously during the lamination process, avoiding slippage and ensuring the accuracy and stability of the lamination.

[0074] Before the diaphragm 300 is laminated with the electrode sheet 200, adhesive needs to be applied to one side of its surface. During the lamination process of the diaphragm 300 and the electrode sheet 200, the lamination pressure generated by the drive roller 101 and the driven roller 102 will squeeze the adhesive on the diaphragm 300 out from the edges of the electrode sheet 200 and the diaphragm 300. The squeezed-out residual adhesive will remain on the surface of the drive roller 101 and the driven roller 102, which will affect the flatness and uniformity of the electrode sheet 200 and the diaphragm 300 during the subsequent lamination process.

[0075] Based on this, in one specific embodiment of this application, the surface of the passive roller 102 is provided with a first anti-stick coating. This first anti-stick coating can be a Teflon coating, as Teflon has superior anti-stick properties. Spraying a Teflon coating onto the surface of the passive roller 102 enables the passive roller 102 to have an anti-stick effect. It should be noted that the passive roller 102 can also be a Teflon rubber roller. When the passive roller 102 has the first anti-stick coating sprayed onto its surface, the passive roller 102 can be a rubber pressure roller.

[0076] The surface of the drive roller 101 is provided with a second anti-stick coating. This second anti-stick coating can also be a Teflon coating, as Teflon has superior anti-stick properties. Spraying a Teflon coating onto the surface of the drive roller 101 enables the drive roller 101 to have an anti-stick effect. When the drive roller 101 has a second anti-stick coating sprayed onto its surface, the drive roller 101 can be an aluminum alloy pressure roller.

[0077] It should be noted that the first and second anti-stick coatings can also be made of other materials with anti-stick properties, and are not limited to Teflon.

[0078] In this embodiment, by spraying an anti-stick coating on the passive roller 102 and the active roller 101, the probability of residual adhesive adhering to the roller surface can be reduced, thereby avoiding affecting the flatness and uniformity of the electrode sheet 200 and the diaphragm 300 during the composite process.

[0079] This application also discloses a composite rolling system, which includes two composite rolling mechanisms 100, which are the composite rolling mechanisms 100 disclosed in the above embodiments. One composite rolling mechanism 100 is used for the composite of the positive electrode sheet and the separator, and the other composite rolling mechanism 100 is used for the composite of the negative electrode sheet and the separator. The composite rolling system disclosed in this application, having the aforementioned composite rolling mechanism 100, possesses all the technical effects of the aforementioned composite rolling mechanism 100, which will not be elaborated upon here.

[0080] It should be noted that, for the electrode sheet and the diaphragm to achieve perfect bonding, the composite rolling system may also include a web guiding mechanism and a tensioning mechanism. That is, a web guiding mechanism and a tensioning mechanism need to be installed upstream of both composite rolling mechanisms 100.

[0081] The correction mechanism can adjust the deviations generated during the operation of the electrode sheet and the diaphragm in real time, so that the positional deviation between the diaphragm and the electrode sheet before lamination is within ±0.5mm. The correction mechanism can be the same as a traditional correction mechanism, and this embodiment does not limit the specific structure of the correction mechanism.

[0082] The tension mechanism enables the electrode sheet and the diaphragm to achieve a better adhesion. If the diaphragm tension is too high, the electrode sheet is prone to detaching from the diaphragm after bonding, resulting in a weak bond. If the tension of the diaphragm or electrode sheet is too low, wrinkles are likely to form during bonding. Therefore, the tension mechanism is used to adjust the tension of the electrode sheet and the diaphragm to maintain a better adhesion.

[0083] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0084] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0085] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0086] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A compound roll press mechanism characterized by, include: Roller support (103); The active roller (101) is rotatably supported on the roller support (103); An active roller drive device (104) is mounted on the roller support (103) and is used to drive the active roller (101) to rotate. A pressure-applying assembly and a passive roller (102), wherein the passive roller (102) is rotatably supported on the output end of the pressure-applying assembly, and the pressure-applying assembly is used to drive the passive roller (102) to move closer to and away from the active roller (101); A parallelism adjustment device is provided on the roller support (103) for adjusting the extreme positions of both ends of the passive roller (102) facing the active roller (101).

2. The compound roll press mechanism of claim 1, wherein, At least one parallelism adjustment device is provided at both ends of the passive roller (102).

3. The compound roll press mechanism of claim 2, wherein, The plane containing the axis of the active roller (101) and the axis of the passive roller (102) is a reference plane; The passive roller (102) is provided with a parallelism adjustment device at its end. The parallelism adjustment device is located on the reference plane and between the active roller (101) and the passive roller (102).

4. The compound roll press mechanism of claim 2, wherein The plane containing the axis of the active roller (101) and the axis of the passive roller (102) is a reference plane; The passive roller (102) is provided with a plurality of parallelism adjustment devices at its end. Each of the parallelism adjustment devices is respectively located on both sides of the reference plane and between the active roller (101) and the passive roller (102).

5. The composite roller pressing mechanism as described in claim 2, characterized in that, The number of parallelism adjustment devices corresponding to the first end of the passive roller (102) is n, and the number of parallelism adjustment devices corresponding to the second end of the passive roller (102) is m, then m≥n.

6. The composite roller pressing mechanism according to any one of claims 1-5, characterized in that, The parallelism adjustment device includes: A parallelism adjustment seat (108) is disposed on the roller pressing support (103); A lifting device is provided on the parallelism adjustment seat (108), and the end of the lifting device facing the passive roller (102) is a limiting end that restricts the extreme position of the passive roller (102).

7. The composite roller pressing mechanism as described in claim 6, characterized in that, The lifting device includes an adjusting screw, and the parallelism adjusting seat (108) has an adjusting screw hole, and the adjusting screw is threadedly engaged with the adjusting screw hole.

8. The composite roller pressing mechanism according to any one of claims 1-5, characterized in that, The pressure application component includes: A pressure driving device (105) is mounted on the roller support (103); A pressure support (106) is connected to the output end of the pressure driving device (105). The pressure driving device (105) is used to drive the pressure support (106) to move closer to and away from the active roller (101). The passive roller (102) is rotatably supported on the pressure support (106).

9. The composite roller pressing mechanism as described in claim 8, characterized in that, The pressure support (106) includes a main pressure support (1061) and pressure side supports (1062) disposed at both ends of the main pressure support (1061). The two ends of the passive roller (102) are rotatably supported on the two pressure side supports (1062). The parallelism adjustment device is used to adjust the extreme position of the pressure-applying side support (1062).

10. The composite roller pressing mechanism as described in claim 9, characterized in that, The pressure-applying side support (1062) and the roller support (103) are slidably engaged by the slide rail assembly (109); The slide rail assembly (109) includes a slide rail body (1091) and a slide groove body (1092) that are in sliding fit. One of the slide rail body (1091) and the slide groove body (1092) is disposed on the pressure side bracket (1062), and the other is disposed on the roller pressing bracket (103).

11. The composite roller pressing mechanism as described in claim 8, characterized in that, The number of pressure driving devices (105) is one, and the output end of the pressure driving device (105) is connected to the middle of the pressure support.

12. The composite roller pressing mechanism as described in claim 8, characterized in that, The pressure driving device (105) is a pressure cylinder, and a pressure regulating valve (107) is provided in the air circuit of the pressure cylinder.

13. The composite rolling mechanism according to any one of claims 1-5, characterized in that, The active roller (101) is a metal pressure roller, and the passive roller (102) is a rubber roller.

14. The composite rolling mechanism as described in claim 13, characterized in that, The passive roller (102) has a first anti-stick coating on its surface or the passive roller (102) is a Teflon roller, and the active roller (101) has a second anti-stick coating on its surface.

15. The composite rolling mechanism according to any one of claims 1-5, characterized in that, The active roller (101) is located below the passive roller (102).

16. A composite roller pressing system, characterized in that, It includes two composite rolling mechanisms, wherein the composite rolling mechanism is the composite rolling mechanism as described in any one of claims 1-15; One of the composite rolling mechanisms is used for the composite of the positive electrode and the separator, and the other composite rolling mechanism is used for the composite of the negative electrode and the separator.

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