Device for preventing diaphragm from being separated from roller

Abstract

The utility model discloses a device for preventing a diaphragm from being separated from a roller, which comprises a diaphragm swing roller frame and a plurality of fixed passing rollers arranged on the diaphragm swing roller frame, the diaphragm sequentially passes through the plurality of fixed passing rollers to move, an eccentric roller mechanism is further arranged on the diaphragm swing roller frame, and the eccentric roller mechanism is arranged on the diaphragm swing roller frame. The eccentric roller mechanism comprises an eccentric roller and a driving unit used for driving the eccentric roller to rotate, the eccentric roller is located between one adjacent fixed passing roller, and the eccentric roller is used for adjusting the tension degree of the diaphragm when rotating. According to the utility model, the diaphragm buffer hysteresis deviation caused by large acceleration / deceleration is absorbed or released through the eccentric roller, so that the condition that the diaphragm is separated from the roller or the diaphragm is excessively tensioned and stretched is avoided, and the quality of a laminated battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm unwinding, in particular to a device for preventing diaphragm from falling off a roller. Background Art

[0002] The battery cell of a lithium-ion battery is generally formed by the staggered stacking of positive and negative electrode sheets. In the battery cell manufacturing process, it is necessary to first manufacture the single positive and negative electrode sheets, and then stagger the positive and negative electrode sheets on the stacking platform to form a battery cell. In the process of staggered stacking of the positive and negative electrode sheets, it is necessary to insert a diaphragm with an insulating isolation function between the positive and negative electrode sheets. In the actual electrode sheet stacking and coating process, generally after a layer of electrode sheets is stacked on the stacking platform, the diaphragm is covered on the electrode sheet, and the cycle is continuously alternating until the battery cell stacking is completed. The incoming diaphragm material is generally in a strip structure. After the strip-shaped diaphragm is pulled out from the material roll, it needs to be covered back and forth on the electrode sheet placed on the stacking platform to complete the coating.

[0003] In the prior art, the laminating device directly pulls the diaphragm from the material roll, and the material roll rotates to release the diaphragm. In the actual lamination process, the material roll unloading speed and the film pulling speed of the laminating device cannot be kept completely consistent in real time and continuously, and the acceleration / deceleration of the diaphragm belt will cause the diaphragm buffer hysteresis deviation; if the material roll unloading speed is too fast, the diaphragm belt between the material roll and the laminating device is in a relaxed state, and the diaphragm is separated from the roller, resulting in surface wrinkles or warping of the diaphragm; and the film pulling speed of the laminating device is greater than the material roll unloading speed, the diaphragm will be over-tensioned and stretched, resulting in uneven distribution of material inside the flexible diaphragm. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a device for preventing the diaphragm from falling off the roller, which absorbs or releases the diaphragm buffer hysteresis deviation caused by acceleration / deceleration through an eccentric roller, thereby preventing the diaphragm from falling off the roller or the diaphragm from being over-tensioned and stretched, thereby improving the quality of the laminated battery cell.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A device for preventing a diaphragm from falling off a roller comprises a diaphragm swing roller frame and a plurality of fixed rollers arranged on the diaphragm swing roller frame. The diaphragm passes through the plurality of fixed rollers in sequence for conveying. The diaphragm swing roller frame is also provided with an eccentric roller mechanism. The eccentric roller mechanism comprises an eccentric roller and a driving unit for driving the eccentric roller to rotate. The eccentric roller is located between one of the adjacent fixed rollers. The eccentric roller is used to adjust the tension of the diaphragm when it rotates.

[0007] As a further improvement of the above technical solution, the eccentric roller includes a carbon fiber roller and a first eccentric shaft and a second eccentric shaft respectively arranged at both ends of the carbon fiber roller, the first eccentric shaft and the second eccentric shaft are coaxially arranged, the carbon fiber roller is eccentrically arranged to the first eccentric shaft and the second eccentric shaft, and the first eccentric shaft and the second eccentric shaft are both rotatably connected to the diaphragm swing roller frame.

[0008] As a further improvement of the above technical solution, bearings are arranged between the first eccentric shaft, the second eccentric shaft and the diaphragm swing roller frame.

[0009] As a further improvement of the above technical solution, the driving unit includes a motor, the motor is fixedly connected to the diaphragm swing roller frame through a motor mounting seat, and the main shaft of the motor is coaxially connected to the first eccentric shaft.

[0010] As a further improvement of the above technical solution, the main shaft of the motor is connected to the first eccentric shaft via a first coupling, the main shaft of the motor is key-connected to the first coupling, and the eccentric shaft is connected to the first coupling via a locking nut.

[0011] As a further improvement of the above technical solution, the eccentric roller mechanism further includes a potentiometer, and a detection end of the potentiometer is connected to the second eccentric shaft.

[0012] As a further improvement of the above technical solution, a potentiometer mounting plate is provided on the diaphragm swing roller frame, the potentiometer is mounted on the potentiometer mounting plate, and the potentiometer is connected to the eccentric shaft via a second coupling.

[0013] As a further improvement of the above technical solution, the fixed roller includes a first fixed roller, a second fixed roller and a third fixed roller, the first fixed roller and the third fixed roller are respectively arranged at the top and the bottom of the diaphragm swing roller frame, and the number of the first fixed roller and the third fixed roller are two, the two first fixed rollers are arranged in parallel, and there is a gap between the two first fixed rollers for the diaphragm to pass through, and the two third fixed rollers are arranged in parallel, and there is a gap between the two third fixed rollers for the diaphragm to pass through.

[0014] As a further improvement of the above technical solution, the diaphragm swing roller frame includes a first frame mounting plate and a second frame mounting plate, the first frame mounting plate and the second frame mounting plate are respectively used to install the first fixed roller and the third fixed roller, the first frame mounting plate and the second frame mounting plate are both provided with through holes, the through holes of the first frame mounting plate are located directly below the gap between the two first fixed rollers, and the through holes of the second frame mounting plate are located directly above the gap between the two third fixed rollers.

[0015] The beneficial effects of the utility model are as follows: when the unwinding speed of the diaphragm material roll is too fast, that is, the tension of the diaphragm begins to decrease, the eccentric roller rotates to support the diaphragm to keep the tension of the diaphragm as it is, thereby preventing the diaphragm from loosening and escaping from the roller; when the film pulling speed is greater than the unwinding speed of the material roll, the diaphragm will be in a state of excessive tension and stretching, and the eccentric roller rotates back to release part of the buffered diaphragm to keep the tension of the diaphragm as it is, thereby preventing the diaphragm from being excessively tensioned and stretched. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the assembly of a device for preventing the diaphragm from falling off the roller in the utility model;

[0018] Figure 2 This is an exploded view of a device for preventing diaphragm from falling off the roller of the utility model;

[0019] Figure 3 It is an exploded view of the eccentric roller mechanism in the embodiment of the utility model;

[0020] Figure 4 This is a front view of the eccentric roller mechanism in the embodiment of the utility model;

[0021] Figure 5 It is a simplified view of the eccentric roller mechanism in the embodiment of the utility model;

[0022] Figure 6 It is a schematic diagram of the diaphragm tape transport in the embodiment of the utility model.

[0023] Figure numerals: 1. diaphragm swing roller frame; 11. first frame mounting plate; 12. first through hole; 13. second frame mounting plate; 14. second through hole; 2. first fixed roller; 3. second fixed roller; 4. third fixed roller; 5. eccentric roller mechanism; 51. eccentric roller; 511. carbon fiber roller; 512. first eccentric shaft; 513. second eccentric shaft; 52. drive unit; 521. motor; 522. motor mounting seat; 53. potentiometer; 54. bearing; 55. first coupling; 56. locking nut; 57. second coupling; 58. potentiometer mounting plate; 6. diaphragm; S. rotation center line. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that according to the specific implementation situation, a better connection structure can be formed by adding or reducing connection accessories. For example, fixed connection / fixed installation can be selected according to the needs of screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods. For example, detachable connection can be selected according to the needs of screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods. The various technical features in the creation of the utility model can be combined interactively without conflicting with each other.

[0025] Reference Figure 1 , Figure 2 The embodiment of the utility model provides a device for preventing the diaphragm from falling off the roller, comprising a diaphragm swing roller frame 1 and a plurality of fixed rollers arranged on the diaphragm swing roller frame 1, and the diaphragm 6 passes through the plurality of fixed rollers in sequence for belt conveying. Specifically, the diaphragm swing roller frame 1 comprises a first frame mounting plate 11 and a second frame mounting plate 13, and the fixed rollers comprise a first fixed roller 2, a second fixed roller 3 and a third fixed roller 4. The number of the first fixed roller 2 and the number of the third fixed roller 4 are both two, and the two first fixed rollers 2 are arranged in parallel on the first frame mounting plate 11 at the top of the diaphragm swing roller frame 1. The diaphragm swing roller frame 1 is mounted on a plate 11, and there is a gap between the two first fixed rollers 2 for the diaphragm 6 to pass through, and the first frame mounting plate 11 is provided with a first through hole 12, and the first through hole 12 is located directly below the gap between the two first fixed rollers 2; similarly, the two third fixed rollers 4 are arranged in parallel on a second frame mounting plate 13 at the bottom of the diaphragm swing roller frame 1, and there is a gap between the two third fixed rollers 4 for the diaphragm 6 to pass through, and the second frame mounting plate 13 is provided with a second through hole 14, and the second through hole 14 is located directly above the gap between the two second fixed rollers 3.

[0026] In this embodiment, refer to Figure 2 , Figure 3 and Figure 4The diaphragm swing roller frame 1 is also provided with an eccentric roller mechanism 5, which includes an eccentric roller 51 and a driving unit 52 for driving the eccentric roller 51 to rotate. The eccentric roller 51 is located between one of the adjacent fixed rollers, preferably, the eccentric roller 51 is located between the first fixed roller 2 and the second fixed roller 3. Further, the eccentric roller 51 includes a carbon fiber roller 511 and a first eccentric shaft 512 and a second eccentric shaft 513 respectively arranged at both ends of the carbon fiber roller 511, the first eccentric shaft 512 and the second eccentric shaft 513 are coaxially arranged, the carbon fiber roller 511 is eccentrically arranged with the first eccentric shaft 512 and the second eccentric shaft 513, the first eccentric shaft 512 and the second eccentric shaft 513 are both rotatably connected to the diaphragm swing roller frame 1, and a bearing 54 is arranged between the first eccentric shaft 512, the second eccentric shaft 513 and the diaphragm swing roller frame 1 to improve the stability of the rotation of the eccentric roller 51.

[0027] Reference Figure 5 , the axis of the first eccentric shaft 512 and the second eccentric shaft 513 is the rotation center line S of the eccentric roller 51, that is, the carbon fiber roller 511 rotates around the rotation center line S, and the diaphragm 6 passes through the first fixed roller 2, the carbon fiber roller 511, the second fixed roller 3 and the third fixed roller 4 in sequence when it is running (refer to Figure 6 ), when the unwinding speed of the diaphragm 6 material roll is too fast, that is, the tension of the diaphragm 6 begins to decrease, then the carbon fiber roller 511 rotates to support the diaphragm 6 (and at the same time achieves the function of caching the diaphragm 6) to keep the tension of the diaphragm 6 as it is, thereby preventing the diaphragm 6 from loosening and detaching from the roller; when the film pulling speed is greater than the unwinding speed of the material roll, the diaphragm 6 will be in a state of excessive tension and stretching. At this time, the carbon fiber roller 511 rotates back to release part of the cached diaphragm 6 to keep the tension of the diaphragm 6 as it is, thereby preventing the diaphragm 6 from being excessively tensioned and stretched.

[0028] In this embodiment, refer to Figure 3 The driving unit 52 includes a motor 521, which is fixedly connected to the diaphragm swing roller frame 1 through a motor mounting seat 522. The main shaft of the motor 521 is coaxially connected to the first eccentric shaft 512. Specifically, the main shaft of the motor 521 is connected to the first eccentric shaft 512 through a first coupling 55. The main shaft of the motor 521 is connected to the first coupling 55 by a key connection, and the eccentric shaft is connected to the first coupling 55 through a locking nut 56. When the main shaft of the motor 521 rotates, the first eccentric shaft 512 is driven to rotate, thereby driving the carbon fiber roller 511 to deflect, so as to adjust the tension of the diaphragm 6.

[0029] In some embodiments, reference Figure 3The eccentric roller mechanism 5 also includes a potentiometer 53. A potentiometer mounting plate 58 is provided on the diaphragm swing roller frame 1. The potentiometer 53 is mounted on the potentiometer mounting plate 58. The potentiometer 53 is connected to the eccentric shaft via a second coupling 57. The detection end of the potentiometer 53 is connected to the second eccentric shaft 513 to detect the rotation of the eccentric roller 51.

[0030] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A device for preventing a diaphragm from falling off a roller, characterized in that: It includes a diaphragm swing roller frame and a plurality of fixed rollers arranged on the diaphragm swing roller frame. The diaphragm passes through the plurality of fixed rollers in sequence for tape conveying. The diaphragm swing roller frame is also provided with an eccentric roller mechanism. The eccentric roller mechanism includes an eccentric roller and a driving unit for driving the eccentric roller to rotate. The eccentric roller is located between one of the adjacent fixed rollers. The eccentric roller is used to adjust the tension of the diaphragm when it rotates.

2. The device for preventing the diaphragm from falling off the roller according to claim 1, characterized in that: The eccentric roller includes a carbon fiber roller and a first eccentric shaft and a second eccentric shaft respectively arranged at both ends of the carbon fiber roller, the first eccentric shaft and the second eccentric shaft are coaxially arranged, the carbon fiber roller is eccentrically arranged to the first eccentric shaft and the second eccentric shaft, and the first eccentric shaft and the second eccentric shaft are both rotatably connected to the diaphragm swing roller frame.

3. The device for preventing the diaphragm from falling off the roller according to claim 2, characterized in that: Bearings are arranged between the first eccentric shaft, the second eccentric shaft and the diaphragm swing roller frame.

4. The device for preventing the diaphragm from falling off the roller according to claim 2, characterized in that: The driving unit comprises a motor, and the motor is fixedly connected to the diaphragm swing roller frame through a motor mounting seat, and the main shaft of the motor is coaxially connected to the first eccentric shaft.

5. The device for preventing the diaphragm from falling off the roller according to claim 4, characterized in that: The main shaft of the motor is connected to the first eccentric shaft via a first coupling, the main shaft of the motor is key-connected to the first coupling, and the eccentric shaft is connected to the first coupling via a locking nut.

6. The device for preventing the diaphragm from falling off the roller according to claim 4, characterized in that: The eccentric roller mechanism further comprises a potentiometer, and a detection end of the potentiometer is connected to the second eccentric shaft.

7. The device for preventing the diaphragm from falling off the roller according to claim 6, characterized in that: A potentiometer mounting plate is provided on the diaphragm swing roller frame, the potentiometer is mounted on the potentiometer mounting plate, and the potentiometer is connected to the eccentric shaft via a second coupling.

8. The device for preventing the diaphragm from falling off the roller according to claim 1, characterized in that: The fixed rollers include a first fixed roller, a second fixed roller and a third fixed roller, the first fixed roller and the third fixed roller are respectively arranged at the top and the bottom of the diaphragm swing roller frame, and the number of the first fixed roller and the third fixed roller are two, the two first fixed rollers are arranged in parallel, and there is a gap between the two first fixed rollers for the diaphragm to pass through, and the two third fixed rollers are arranged in parallel, and there is a gap between the two third fixed rollers for the diaphragm to pass through.

9. The device for preventing the diaphragm from falling off the roller according to claim 8, characterized in that: The diaphragm swing roller frame includes a first frame mounting plate and a second frame mounting plate, the first frame mounting plate and the second frame mounting plate are respectively used to mount the first fixed roller and the third fixed roller, the first frame mounting plate and the second frame mounting plate are both provided with through holes, the through holes of the first frame mounting plate are located directly below the gap between the two first fixed rollers, and the through holes of the second frame mounting plate are located directly above the gap between the two third fixed rollers.

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