Pole piece unwinding and smoothing device

Abstract

The utility model discloses a pole piece unreeling and smoothing device which comprises a follow-up roller, a follow-up roller base, a distance measuring sensor, a smoothing plate and a smoothing plate driving module, the follow-up roller is rotationally connected to the follow-up roller base, the smoothing plate driving module comprises a rotating shaft and a driving unit, the rotating shaft is parallel to the follow-up roller, and the driving unit is arranged on the follow-up roller base. The smoothing plate and the distance measuring sensor are installed on the rotating shaft, the distance measuring sensor is used for detecting the position of a pole piece and transmitting detection information to the driving unit, and the driving unit is used for receiving the detection information and driving the rotating shaft to rotate. The flattening plate can rotate along with the change of the diameter of a pole piece material roll, and guiding and flattening work on a pole piece and a pole lug is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a pole piece unwinding and smoothing device. Background Art

[0002] There are two main methods for making lithium-ion battery cells: winding and stacking. Both methods require the positive and negative electrode sheets to be unwound and then transported on tape. Generally, during the tape transport of the electrode sheets, a tab smoothing mechanism is provided to smooth and guide the tabs to prevent the tabs from folding while following the electrode sheets and causing the rolled battery cells to be scrapped.

[0003] The unwinding process of the electrode sheet is the first step in the winding of the battery cell. During the unwinding process, whether the electrode ear is folded will directly affect the subsequent work of the battery cell winding machine. For example, if the electrode ear is folded during the unwinding process, no matter how high the yield rate of other devices of the subsequent battery cell winding machine is or how fast the processing speed is, it is impossible to avoid the scrapping of the battery cell containing the folded electrode ear, and it will also reduce the production efficiency of the battery cell winding machine.

[0004] Therefore, in order to avoid the problem of the pole ear folding when the pole piece is unwound, the existing processing method is to set a pole ear guiding and smoothing mechanism with a fixed angle at the first roller of the pole piece unwinding belt to guide and smooth the pole ear. However, the existing pole ear guiding and smoothing mechanism has the following disadvantages: the angle of the smoothing plate of the pole ear guiding and smoothing mechanism is fixed, so that when the diameter of the pole sheet roll changes (the diameter of the pole sheet roll will decrease with the increase of the unwinding amount), the angle of the smoothing plate is difficult to adapt to the diameter of the pole sheet roll, which causes the pole ear smoothing guide mechanism to fail in guiding and smoothing the pole ear. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a pole piece unwinding and smoothing device, wherein the smoothing plate can rotate as the diameter of the pole piece material roll changes, so as to maintain the guiding and smoothing work on the pole piece ears.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A pole piece unwinding and smoothing device comprises a follower roller, a follower roller base, a distance measuring sensor, a smoothing plate and a smoothing plate driving module, wherein the follower roller is rotatably connected to the follower roller base, the smoothing plate driving module comprises a rotating shaft and a driving unit, the rotating shaft is arranged parallel to the follower roller, the smoothing plate and the distance measuring sensor are mounted on the rotating shaft, the distance measuring sensor is used to detect the position of the pole piece and transmit the detection information to the driving unit, and the driving unit is used to drive the rotating shaft to rotate after receiving the detection information.

[0008] As a further improvement of the above technical solution, a roller shaft is rotatably connected to the follower roller base, the follower roller is sleeved on the roller shaft, and the follower roller is rotatably connected to the roller shaft.

[0009] As a further improvement of the above technical solution, the follower roller is connected to the roller shaft via a bearing.

[0010] As a further improvement of the above technical solution, the rotating shaft is fixedly connected to the roller shaft via a connecting frame, and the driving unit is used to drive the roller shaft to rotate.

[0011] As a further improvement of the above technical solution, the driving unit includes a motor, the motor is installed on the follower roller base, and the main shaft of the motor is coaxially connected to the roller shaft.

[0012] As a further improvement of the above technical solution, the main shaft of the motor is connected to the roller shaft through a coupling.

[0013] As a further improvement of the above technical solution, a mounting block is connected to the rotating shaft, and the smoothing plate is fixedly connected to the mounting block.

[0014] As a further improvement of the above technical solution, the mounting block includes a slot, the mounting block is connected to the rotating shaft through the slot, the slot is connected to a locking screw, and the locking screw is used to adjust the tightness of the slot.

[0015] As a further improvement of the above technical solution, the smoothing plate is in the shape of an arc-shaped sheet.

[0016] As a further improvement of the above technical solution, a photoelectric sensor is arranged on the follower roller base, and the photoelectric sensor is used to detect the rotation angle of the roller shaft.

[0017] The beneficial effect of the utility model is as follows: as the pole piece material strip is unwound, the winding diameter will gradually decrease, and when the caressing plate is located on the inner side of the pole piece, the distance between the pole piece and the caressing plate will gradually decrease, thereby causing damage to the pole piece; when the caressing plate is located on the outer side of the pole piece, the distance between the pole piece and the caressing plate will gradually increase, and the caressing plate will no longer guide the pole piece. Therefore, the utility model detects the position of the pole piece through a distance measuring sensor, that is, detects the distance between the pole piece and the distance measuring sensor. The distance measuring sensor and the caressing plate are located on the same rotating axis. According to the initial position setting, when the distance measuring sensor detects that the distance between the pole piece and the distance measuring sensor is reduced, a signal is transmitted to the motor, and the controller of the motor drives the main shaft to rotate a certain angle, thereby driving the rotating shaft to rotate a certain distance, so that the distance between the distance measuring sensor and the pole piece is quickly restored to the initial distance, so that the caressing plate can maintain contact with the pole piece, continuously guide the pole piece material strip, and smooth the pole ear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 This is a front view of a pole piece unwinding and smoothing device of the utility model;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of a pole piece unwinding and smoothing device of the utility model;

[0021] Figure 3 It is a schematic diagram of a pole piece unwinding and smoothing device used for a pole piece material strip when it is fully rolled when unwinding;

[0022] Figure 4 It is a schematic diagram of a pole piece unwinding and smoothing device of the utility model after the pole piece material strip is unwinded.

[0023] Figure numerals: 1. follower roller base; 2. follower roller; 3. roller shaft; 4. bearing; 5. motor; 6. coupling; 7. connecting frame; 8. rotating shaft; 9. distance measuring sensor; 10. caressing plate; 11. mounting block; 12. photoelectric sensor; 20. pole piece strip. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, 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 formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0025] Reference Figure 1 , Figure 2 A pole piece unwinding and smoothing device comprises a follower roller 2, a follower roller base 1, a distance measuring sensor 9, a smoothing plate 10 and a driving module of the smoothing plate 10, wherein the follower roller 2 is rotatably connected to the follower roller base 1. Specifically, a roller shaft 3 is rotatably connected to the follower roller base 1, and the follower roller 2 is sleeved on the roller shaft 3. The follower roller 2 and the roller shaft 3 are connected via a bearing 4, so that the follower roller 2 can rotate on the roller shaft 3, and is used for supporting and transmitting the pole piece tape.

[0026] Furthermore, the driving module of the smoothing plate 10 includes a rotating shaft 8, a connecting frame 7 and a driving unit. The rotating shaft 8 is fixedly connected to the roller shaft 3 through the connecting frame 7. The rotating shaft 8 is parallel to the follower roller 2, so that when the roller shaft 3 rotates, the rotating shaft 8 is driven to revolve around the follower roller 2. The driving unit includes a motor 5. The motor 5 is installed on the follower roller base 1. The main shaft of the motor 5 is coaxially connected to the roller shaft 3 through a coupling 6, so that when the motor 5 is running, the roller shaft 3 is driven to rotate, and then the rotating shaft 8 is driven to rotate.

[0027] In this embodiment, refer to Figure 1 and Figure 2 The stroking plate 10 and the distance sensor 9 are both mounted on the rotating shaft 8, so that the stroking plate 10 and the distance sensor 9 can rotate with the rotating shaft 8, that is, the spatial positions of the two change. In actual use, the distance sensor 9 and the motor 5 are controlled by the PLC controller for information transfer. Specifically, the signal output end of the distance sensor 9 is connected to the signal input end of the PLC controller, and the signal output end of the PLC controller is connected to the signal input end of the motor 5. The specific control process, signal transmission method, control circuit, PLC controller built-in program, etc. belong to the prior art, which are common knowledge or conventional technical means in the field, and will not be repeated here. In this embodiment, the distance sensor 9 detects the position of the pole piece and transmits the detection signal The information is transmitted to the PLC controller, and the PLC controller processes the detection information and transmits the control instruction to the motor 5. The motor 5 starts to run after receiving the signal, and the main shaft of the motor 5 rotates a certain angle according to the control instruction transmitted by the PLC controller, thereby driving the rotating shaft 8 to rotate a certain angle, driving the roller shaft 3, the connecting frame 7 and the rotating shaft 8 to rotate synchronously, and also driving the caressing plate 10 and the distance measuring sensor 9 on the rotating shaft 8 to move a certain distance, so that the distance between the distance measuring sensor 9 and the pole piece material strip 20 reaches the initial standard distance in time, so that the caressing plate 10 keeps in contact with the pole piece, and the pressure of the caressing plate 10 on the pole piece is maintained at the initial pressure, thereby realizing that the caressing plate 10 always plays a guiding and smoothing role on the pole piece during the change of the winding diameter when the pole piece is unwound. Figure 3 and Figure 4 The rotation of the smoothing plate 10 changes when the pole piece is unwound in the full-wound state and the unwinding end state, and the smoothing plate 10 always contacts the pole piece to play a guiding and smoothing role.

[0028] In a specific embodiment, a mounting block 11 is fixedly connected to the rotating shaft 8, and the smoothing plate 10 is fixedly connected to the mounting block 11. More specifically, the mounting block 11 includes a slot, and the mounting block 11 is connected to the rotating shaft 8 through the slot. The slot is connected to a locking screw, and the locking screw is used to adjust the tightness of the slot. When the locking screw adjusts the slot to loosen, the mounting block 11 can move on the rotating shaft 8, thereby adjusting the position of the mounting block 11, and also adjusting the position of the smoothing plate 10, so that the smoothing plate 10 can be aligned with the position of the pole ear on the pole sheet strip 20, thereby improving the effect of smoothing the pole ear.

[0029] Furthermore, the smoothing plate 10 is an arc-shaped plate, and the convex surface of the smoothing plate 10 is in contact with the pole piece, so that when the pole piece unwinding diameter becomes smaller and the pole piece strip position changes, the smoothing plate 10 moves therewith, and the convex surface of the smoothing plate 10 can always be in contact with the pole piece to maintain the guidance and smoothing of the pole piece ear.

[0030] In some embodiments, a photoelectric sensor 12 is disposed on the follower roller base 1 , and the photoelectric sensor 12 is used to detect the rotation angle of the roller shaft 3 , so that the staff can understand the rotation status of the smoothing roller in real time.

[0031] 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 pole piece unwinding and smoothing device, characterized in that: It includes a follower roller, a follower roller base, a distance measuring sensor, a caressing plate and a caressing plate driving module. The follower roller is rotatably connected to the follower roller base. The caressing plate driving module includes a rotating shaft and a driving unit. The rotating shaft is arranged parallel to the follower roller. The caressing plate and the distance measuring sensor are installed on the rotating shaft. The distance measuring sensor is used to detect the position of the pole piece and transmit the detection information to the driving unit. The driving unit is used to drive the rotating shaft to rotate after receiving the detection information.

2. The pole piece unwinding and smoothing device according to claim 1, characterized in that: The follower roller base is rotatably connected with a roller shaft, the follower roller is sleeved on the roller shaft, and the follower roller is rotatably connected with the roller shaft.

3. The pole piece unwinding and smoothing device according to claim 2, characterized in that: The follower roller is connected to the roller shaft via a bearing.

4. The pole piece unwinding and smoothing device according to claim 2, characterized in that: The rotating shaft is fixedly connected to the roller shaft via a connecting frame, and the driving unit is used to drive the roller shaft to rotate.

5. The pole piece unwinding and smoothing device according to claim 4, characterized in that: The driving unit comprises a motor, which is mounted on the follower roller base, and a main shaft of the motor is coaxially connected with the roller shaft.

6. The pole piece unwinding and smoothing device according to claim 5, characterized in that: The main shaft of the motor is connected to the roller shaft through a coupling.

7. The pole piece unwinding and smoothing device according to claim 6, characterized in that: A mounting block is fixedly connected to the rotating shaft, and the smoothing plate is fixedly connected to the mounting block.

8. The pole piece unwinding and smoothing device according to claim 7, characterized in that: The mounting block comprises a slot, the mounting block is connected to the rotating shaft via the slot, the slot is connected to a locking screw, and the locking screw is used to adjust the tightness of the slot.

9. The pole piece unwinding and smoothing device according to claim 8, characterized in that: The smoothing plate is in the shape of an arc sheet.

10. A pole piece unwinding and smoothing device according to any one of claims 2 to 9, characterized in that: The follower roller base is provided with a photoelectric sensor, and the photoelectric sensor is used to detect the rotation angle of the roller shaft.

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