Tab flattening device and battery cell winding equipment
By designing an extreme ear smoothing device including an arcuate smoothing member and a photoelectric sensor, the problem of poor extreme ear smoothing effect in the prior art is solved, and a more efficient and stable extreme ear smoothing effect is achieved, reducing the inflow of unqualified products.
Patent Information
- Application Number
- CN202420438298.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-06
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-03-06
AI Technical Summary
In the existing lithium battery production technology, the extreme ear smoothing device is difficult to effectively detect and feedback the folding and smoothing effect of the extreme ear, resulting in poor smoothing effect when the equipment is running at high speed, which can easily cause scratches or tear of the extreme ears, and the unqualified products cannot be found in time.
An extreme ear smoothing device is designed, including a first driving mechanism, a second driving mechanism, a smoothing assembly and a sensor assembly. The smoothing assembly adopts an arcuate smoothing member, and the adjustment and control of the smoothing member are realized through the cooperation of the first driving mechanism and the second driving mechanism. The sensor assembly is arranged under the smoothing member, and the photoelectric sensor is used to detect and feedback the folding smoothing effect of the pole ear.
By detecting and feedback the folding and smoothing effect of the pole ear, the effect and stability of the pole ear smoothing effect are improved, the risk of unqualified products flowing into the next process is reduced, and the cell diameter can be better adapted to the increase of the battery cell diameter during the battery cell winding process.
Smart Images
Figure CN222873042U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery production, and in particular to a tab smoothing device and a battery core winding device. Background Art
[0002] The existing lug smoothing at the winding needle is inconvenient to adjust, and the lug smoothing device is in point contact with the lug. As the winding diameter of the battery cell increases, the torsional force becomes larger and uncontrollable. When the equipment runs at high speed, the smoothing effect is not good, which can easily cause scratches or tears on the lugs, and cannot be discovered in time, so the lugs are easily folded and NG batteries flow into the next process. Utility Model Content
[0003] In order to overcome the shortcomings of the prior art, the utility model provides a tab smoothing device and a battery cell winding device, which can detect and feedback the folding and smoothing effect of the tab, thereby improving the tab smoothing effect and stability and reducing the risk of unqualified products flowing into the next process.
[0004] The technical solution adopted by the utility model to solve its technical problems is:
[0005] A tab smoothing device comprises a first driving mechanism, a second driving mechanism, a smoothing assembly and a sensor assembly, wherein the smoothing assembly comprises a smoothing piece, wherein the smoothing piece is a bow-shaped smoothing piece, and is used to elastically press the tab against the surface of a winding needle, wherein the first driving mechanism is fixedly connected to the second driving mechanism, wherein the first driving mechanism is used to drive the smoothing piece to move toward or away from the winding needle, wherein the second driving mechanism is connected to the smoothing piece, wherein the second driving mechanism is used to adjust the smoothing angle between the smoothing piece and the tab of a battery cell, and wherein the sensor assembly is arranged below the smoothing piece, and is used to detect and provide feedback on the folding and smoothing effect of the tab.
[0006] As a preferred technical solution, the smoothing piece includes a first part, a second part and a third part. The first part and the third part are opened inward in an arc shape, and are used to flexibly cut and fold the electrode sheet material line, and to achieve flexible separation of the smoothing piece and the electrode ear. The second part is opened outward in an arc shape, and the arc radius of the second part is ≥ the diameter of the battery cell when the battery cell is wound.
[0007] As a preferred technical solution, the sensor assembly includes a photoelectric sensor, a sensor mounting plate, a fixed block, a fixed rod and a clamp. The photoelectric sensor is installed on the clamp through the sensor mounting plate, the clamp is sleeved on the fixed rod, the fixed rod is connected to the fixed block, and the fixed block is fixedly mounted on the second driving mechanism.
[0008] As a preferred technical solution, the smoothing assembly further includes a smoothing connection block, the smoothing member is mounted on the smoothing connection block, and the smoothing connection block is connected to the second driving mechanism via a pivot.
[0009] As a preferred technical solution, the second driving mechanism includes a low-friction cylinder, a swing arm and a rotating support plate, the low-friction cylinder is arranged on the rotating support plate, the swing arm is clamped at the other end of the pivot, and the swing arm is connected to the low-friction cylinder through a fisheye joint.
[0010] As a preferred technical solution, a connecting assembly is arranged between the first driving mechanism and the second driving mechanism, and the connecting assembly includes a support plate, a guide bracket, a guide shaft and a connecting plate, one end of the support plate is connected to the first driving mechanism, the guide bracket is arranged at the other end of the support plate, the connecting plate is connected to the guide bracket through the guide shaft, and the connecting plate is connected to the second driving mechanism for driving the smoothing piece away from or close to the winding needle.
[0011] As a preferred technical solution, the first driving mechanism includes a screw assembly, a servo motor, a synchronous belt assembly and a fixed plate, the servo motor is connected to the screw assembly through a motor mounting plate, one end of the synchronous belt assembly is connected to the servo motor, and the other end is connected to the screw assembly, the screw assembly is arranged on the fixed plate, and a sliding plate is arranged on the screw assembly, and the smoothing piece is driven by the servo motor to rotate the synchronous belt assembly to drive the slider to slide on the screw assembly, thereby driving the smoothing piece to approach or move away from the winding needle.
[0012] As a preferred technical solution, a drag chain assembly is provided on the first driving mechanism, and the drag chain assembly includes a drag chain mounting plate and a drag chain, the drag chain is arranged on the drag chain mounting plate, one end of the drag chain is connected to the fixed plate via the drag chain mounting plate, and the other end is connected to the sliding plate via a mounting seat, a partition is provided in the drag chain, and wires and air pipes are built into the drag chain, and the wires and air pipes are separated by the partition, and protective sheet metal is provided on the screw rod assembly and the synchronous belt assembly for protecting the screw rod assembly and the synchronous belt assembly.
[0013] As a preferred technical solution, two through-beam sensors are further provided on the fixed plate, and the through-beam sensors are slidably provided on the fixed plate to detect the position of the sliding plate.
[0014] A battery cell winding device comprises a tab smoothing device as described in any one of the above items.
[0015] The beneficial effects of the utility model are as follows: the utility model provides a tab smoothing device and a battery cell winding device, which reduces the risk of unqualified products flowing into the next process by arranging a light sensor under the smoothing piece to detect and feedback the folding and smoothing effect of the tab, and increases the reliable length and smoothing time of the tab smoothing by arranging a bow-shaped smoothing piece, which can better adapt to the continuously increasing diameter during the battery cell winding process, and can improve the tab smoothing effect and stability. 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 structure of a tab smoothing device provided by an example of the utility model;
[0018] Figure 2 yes Figure 1 A schematic structural diagram of the first driving mechanism;
[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of the sensor assembly;
[0020] Figure 4 yes Figure 1 Schematic diagram of the structure of the smoothing component;
[0021] Figure 5 yes Figure 1 A schematic structural diagram of the second driving mechanism;
[0022] Figure 6 yes Figure 1 Schematic diagram of the structure of the connected components. DETAILED DESCRIPTION
[0023] 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.
[0024] Please refer to Figure 1-6An example of the utility model provides a tab smoothing device and a battery cell winding device, comprising a first driving mechanism 1, a second driving mechanism 2, a smoothing component 3, a sensor component 4 and a connecting component 5, wherein the first driving mechanism 1 and the second driving mechanism 2 are connected via the connecting component 5, the smoothing component 3 is connected to the second driving mechanism 2, the first driving mechanism 1 is used to drive a smoothing member 31 in the smoothing component 3 to move toward or away from a winding needle, the second driving mechanism 2 is used to adjust a smoothing angle between the smoothing member 31 and the battery cell tab, and the sensor component 4 is disposed below the smoothing component 3 to detect and provide feedback on the folding and smoothing effect of the tab.
[0025] The smoothing assembly 3 includes a smoothing piece 31 and a smoothing connection block 32. The smoothing piece 31 is installed on the smoothing connection block 32. The smoothing connection block 32 is connected to the second driving mechanism 2 via a pivot 33, so as to control the movement trajectory of the smoothing piece 31. When the diameter of the battery cell increases with the passage of time, the second driving mechanism 2 will provide power to move the smoothing connection block 32 backward a certain distance accordingly, thereby ensuring that the smoothing piece 31 always maintains good contact with the battery cell. The smoothing piece 31 is an arched smoothing piece 31, and the smoothing piece 31 includes a first part 311, a second part 312, and a third part 313. The first part 311 and the third part 313 are opened inward in an arc shape, and are used to flexibly cut and fold the pole piece material line, and are used to flexibly separate the smoothing piece 31 from the pole ear. The second part 312 is opened outward in an arc shape, and the arc radius of the second part 312 is ≥ the diameter of the battery cell when the battery cell is wound. Compared with the original plate-type smoothing piece, the linear length and smoothing time of the pole ear are increased, and the advantages are more obvious in the high-speed winding process. The smoothing surface of the smoothing piece 31 is sprayed with Teflon to prevent metal from contacting the pole ear. The smoothing surface is used to fold the pole piece pole ear during the winding process of the winding needle to contact the pole ear of the bare battery cell, and smooth the pole ear.
[0026] Furthermore, the second driving mechanism 2 includes a low-friction cylinder 22, a swing arm 24 and a rotating support plate 21, the low-friction cylinder 22 is arranged on the rotating support plate 21, the swing arm 24 is clamped at the other end of the pivot 33, and the swing arm 24 is connected to the low-friction cylinder 22 through a fisheye joint 23.
[0027] In this embodiment, the smoothing connection block 32 is connected to the rotating support plate 21 of the second driving mechanism 2 through the pivot 33 in the form of a clamp 44, which is convenient for adjusting the smoothing angle between the smoothing piece 31 and the battery cell pole ear. The other end of the pivot 33 is connected to the low-friction cylinder 22 through a fisheye joint 23. The low-friction cylinder 22 is equipped with an electric proportional valve to provide the smoothing piece 31 with a controllable elastic torque that enables the smoothing piece 31 to rotate the pivot 33 relative to the rotating support plate 21. The smoothing piece 31 elastically presses the pole ear against the surface of the winding needle.
[0028] Furthermore, the sensor assembly 4 includes a photoelectric sensor 41, a sensor mounting plate 42, a fixed block 43, a fixed rod 45 and a clamp 44. The photoelectric sensor 41 is installed on the clamp 44 through the sensor mounting plate 42. The clamp 44 is sleeved on the fixed rod 45. The fixed rod 45 is connected to the fixed block 43. The fixed block 43 is fixedly mounted on the rotating support plate 21.
[0029] In this embodiment, the photoelectric sensor 41 has two functions. One of them is to provide feedback on the folding and smoothing effect of the battery cell tab of the actuator during debugging. By detecting the folding and smoothing effect of the smoothing member 31 and the battery cell tab, the photoelectric sensor 41 can provide a feedback signal to help adjust the angle of the smoothing member 31 and the distance from the winding needle. In this way, the smoothing effect can be optimized to ensure that the folding quality of the battery cell tab meets the requirements. The other function is to detect NG products that still have poor results after folding and smoothing during normal operation of the battery cell winding equipment, and guide them to the battery cell NG area. During the normal operation of the battery cell winding equipment, if the effect after folding and smoothing is still poor, the photoelectric sensor 41 can detect these unqualified products and guide them to the battery cell NG area for further processing.
[0030] Furthermore, the first driving mechanism 1 includes a screw assembly 12, a servo motor 13, a synchronous belt assembly 14 and a fixed plate 11, the servo motor 13 is connected to the screw assembly 12 through a motor mounting plate, one end of the synchronous belt assembly 14 is connected to the servo motor 13, and the other end is connected to the screw assembly 12, the servo motor 13 provides rotational motion, and the synchronous belt assembly 14 can transmit the rotational power of the servo motor 13 to the screw assembly 12 to achieve synchronous motion between the two; the screw assembly 12 is arranged on the fixed plate 11, and a sliding plate 15 is arranged on the screw assembly 12, and the smoothing member 31 drives the synchronous belt assembly 14 to rotate through the servo motor 13 to drive the slider to slide on the screw assembly 12, thereby driving the smoothing member 31 to approach or move away from the winding needle to achieve the smoothing effect; two opposing sensors 8 are also arranged on the fixed plate 11, and the opposing sensors 8 can be slidably arranged on the fixed plate 11 to detect the position of the sliding plate 15. Wherein, protective sheet metal 6 is provided on the screw rod assembly 12 and the synchronous belt assembly 14 for protecting the screw rod assembly 12 and the synchronous belt assembly 14 .
[0031] In this embodiment, the first drive mechanism 1 drives the device to the winding needle winding position, and retracts the device after the battery cell winding is completed to leave space for the turret to flip. During the battery cell winding process, the sliding plate 15 is driven to slide on the screw assembly 12, so that the device can accurately move forward and backward to the correct position to smooth and improve the battery cell. In the battery cell winding process, the diameter of the battery cell will gradually increase with the passage of time. In order to maintain the smoothing effect on the battery cell, the first drive mechanism 1 is powered by the servo motor 13 and the screw assembly 12, and by adjusting the rotation of the synchronous belt assembly 14, the sliding plate 15 and the smoothing member 31 can move accordingly with the change of the battery cell diameter, so that the device can retreat as the battery cell diameter increases, and can continue to contact the battery cell and play a role in smoothing and improving.
[0032] A drag chain assembly 7 is provided on the first driving mechanism 1, and the drag chain assembly 7 includes a drag chain mounting plate 72 and a drag chain 71. The drag chain 71 is provided on the drag chain mounting plate 72, one end of the drag chain 71 is connected to the fixed plate 11 via the drag chain mounting plate 72, and the other end is connected to the sliding plate 15 via a mounting seat, and a partition is provided inside the drag chain 71. The drag chain 71 has built-in electric wires and air pipes, and the electric wires and air pipes are separated by the partition.
[0033] Furthermore, the connecting assembly 5 includes a support plate 51, a guide bracket 52, a guide shaft 53 and a connecting plate 54, one end of the support plate 51 is connected to the first driving mechanism 1, the guide bracket 52 is arranged at the other end of the support plate 51, the connecting plate 54 is connected to the guide bracket 52 through the guide shaft 53, and the connecting plate 54 is connected to the second driving mechanism 2, and is used to drive the smoothing member 31 away from or close to the winding needle. Other mechanisms can be added to the connecting assembly 5 according to actual needs, such as a diaphragm anti-static mechanism, a diaphragm cutting mechanism, etc.
[0034] 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 tab smoothing device, characterized in that: It includes a first driving mechanism, a second driving mechanism, a smoothing component and a sensor component, the smoothing component includes a smoothing piece, the smoothing piece is a bow-shaped smoothing piece, used to elastically press the pole ear against the surface of the winding needle, the first driving mechanism is fixedly connected to the second driving mechanism, the first driving mechanism is used to drive the smoothing piece to move closer to or away from the winding needle, the second driving mechanism is connected to the smoothing piece, the second driving mechanism is used to adjust the smoothing angle between the smoothing piece and the pole ear of the battery cell, the sensor component is arranged below the smoothing piece, and is used to detect and feedback the folding and smoothing effect of the pole ear.
2. The tab smoothing device according to claim 1, characterized in that: The smoothing piece includes a first part, a second part and a third part. The first part and the third part are opened inward in an arc shape, and are used to flexibly cut and fold the electrode sheet material line, and to achieve flexible separation of the smoothing piece and the electrode ear. The second part is opened outward in an arc shape, and the arc radius of the second part is ≥ the diameter of the battery cell when the battery cell is wound.
3. The tab smoothing device according to claim 1, characterized in that: The sensor assembly includes a photoelectric sensor, a sensor mounting plate, a fixed block, a fixed rod and a clamp, the photoelectric sensor is mounted on the clamp through the sensor mounting plate, the clamp is sleeved on the fixed rod, the fixed rod is connected to the fixed block, and the fixed block is fixedly mounted on the second driving mechanism.
4. The tab smoothing device according to claim 1, characterized in that: The smoothing assembly further comprises a smoothing connection block, the smoothing member is mounted on the smoothing connection block, and the smoothing connection block is connected to the second driving mechanism via a pivot.
5. The tab smoothing device according to claim 4, characterized in that: The second driving mechanism includes a low-friction cylinder, a swing arm and a rotating support plate, wherein the low-friction cylinder is arranged on the rotating support plate, the swing arm is clamped at the other end of the pivot, and the swing arm is connected to the low-friction cylinder through a fisheye joint.
6. The tab smoothing device according to claim 1, characterized in that: A connecting assembly is arranged between the first driving mechanism and the second driving mechanism, and the connecting assembly includes a support plate, a guide bracket, a guide shaft and a connecting plate. One end of the support plate is connected to the first driving mechanism, and the guide bracket is arranged at the other end of the support plate. The connecting plate is connected to the guide bracket through the guide shaft, and the connecting plate is connected to the second driving mechanism for driving the smoothing member away from or close to the winding needle.
7. The tab smoothing device according to claim 1, characterized in that: The first driving mechanism includes a screw assembly, a servo motor, a synchronous belt assembly and a fixed plate. The servo motor is connected to the screw assembly through a motor mounting plate. One end of the synchronous belt assembly is connected to the servo motor, and the other end is connected to the screw assembly. The screw assembly is arranged on the fixed plate. A sliding plate is arranged on the screw assembly. The smoothing piece drives the synchronous belt assembly to rotate through the servo motor to drive the slider to slide on the screw assembly, thereby driving the smoothing piece to approach or move away from the winding needle.
8. The tab smoothing device according to claim 7, characterized in that: A drag chain assembly is provided on the first driving mechanism, and the drag chain assembly includes a drag chain mounting plate and a drag chain, the drag chain is provided on the drag chain mounting plate, one end of the drag chain is connected to the fixed plate via the drag chain mounting plate, and the other end is connected to the sliding plate via a mounting seat, a partition is provided in the drag chain, and wires and air pipes are built into the drag chain, and the wires and air pipes are separated by the partition, and protective sheet metal is provided on the screw rod assembly and the synchronous belt assembly for protecting the screw rod assembly and the synchronous belt assembly.
9. The tab smoothing device according to claim 7, characterized in that: The fixed plate is also provided with two through-beam sensors, which are slidably provided on the fixed plate and are used to detect the position of the sliding plate.
10. A battery cell winding device, characterized in that: It comprises a tab smoothing device as claimed in any one of claims 1 to 9.