Battery tab laser cutting equipment

Abstract

The utility model relates to the technical field of battery tab processing, and discloses a battery tab laser cutting device which is characterized in that a tension swing roller assembly is introduced in the tab cutting process, and when the tension swing roller assembly is located at a preset position, the tension swing roller assembly is used for providing a preset tension value for a system pole piece material belt; the position detection assembly is used for collecting angle information of the tension swing roller assembly in real time, when the tension swing roller assembly deviates from a preset position, it is indicated that tension in the system fluctuates, and the control system controls the winding assembly to adjust the winding speed of a pole piece material belt according to the angle information, collected by the position detection assembly, of the tension swing roller assembly. The winding speed and the unwinding speed of the pole piece material belt tend to be consistent, and the tension swing roller assembly tends to be close to the preset position as far as possible, so that the tension stability of the pole piece material belt in the system is ensured, the cutting precision of a pole lug is ensured, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery tab processing technology, and in particular to a battery tab laser cutting device. Background Technology

[0002] In the manufacturing process of lithium batteries, the tab cutting process is one of the key factors in ensuring product quality. Poor cutting techniques can lead to a series of problems, such as surface defects, dimensional errors, or coating peeling. If these problems are not detected and resolved in time, they will significantly reduce battery performance and may cause safety hazards. During the tab cutting process, it is difficult to keep the winding and unwinding speeds of the electrode strip consistent. When the deviation between the two is large, it will cause fluctuations in the tension of the electrode strip in the system, which can easily cause deformation of the electrode strip material. Tension fluctuations will cause the tab to be unstable in position during the cutting process, affecting cutting accuracy and producing quality defects (leading to material waste and increased production costs). Utility Model Content

[0003] The purpose of this invention is to provide a laser cutting device for battery tabs, which solves the problem that tension fluctuations during the cutting process affect the cutting accuracy of existing tabs.

[0004] To achieve the above objectives, this application provides a battery tab laser cutting device, including a frame, the frame having a first end and a second end disposed opposite to each other along the moving direction of the electrode strip, including:

[0005] An unwinding assembly is provided at the first end, and the unwinding assembly is used to release the electrode strip;

[0006] The tension swing roller assembly has a preset position, and when the tension swing roller assembly is in the preset position, it provides a preset tension to the electrode strip.

[0007] A position detection component is used to collect the angle information of the tension swing roller assembly;

[0008] A tab forming assembly is used to cut the tab area at the edge of the electrode strip to form a tab;

[0009] A winding assembly, located at the second end, is used to wind up the cut electrode strip; and

[0010] The control system includes a position detection component and a winding component that are electrically connected to the control system. The control system is used to receive the angle information and adjust the winding speed of the winding component.

[0011] In some embodiments of this application, the tension swing roller assembly includes a tension swing frame, one end of which is rotatably mounted on the frame, and the tension swing frame is provided with a guide roller group for the electrode strip to pass over, and the other end of the tension swing frame is connected to a tension mechanism, which positions the tension swing frame in the preset position.

[0012] The position detection component includes an angle sensor mounted on the tension swing frame, and the angle sensor is connected to the control system.

[0013] In some embodiments of this application, the guide roller group includes a first guide roller and a second guide roller arranged at an upper and lower interval, and both the first guide roller and the second guide roller are rotatably mounted on the tension swing frame;

[0014] The tension mechanism includes a tension cylinder, the cylinder body of which is rotatably mounted on the frame, and the telescopic end of which is rotatably mounted on the tension swing frame.

[0015] In some embodiments of this application, the battery tab laser cutting equipment further includes an auxiliary cutting component, which includes a feed roller and an output roller arranged at intervals, both of which are rotatably mounted on the frame; the feed roller has a first guide surface facing the first end, and the output roller has a second guide surface facing the first end, and the electrode strip passes around the first guide surface and the second guide surface from top to bottom in sequence;

[0016] The electrode strip located between the first guide surface and the second guide surface constitutes a strip cutting section. The strip cutting section has a cutting position corresponding to the tab forming assembly. The first guide surface and the second guide surface overlap in the vertical projection so that the strip cutting section is vertical.

[0017] In some embodiments of this application, the tab forming assembly is located on the side of the strip cutting section facing the first end, and two tab forming assemblies are provided, with the two tab forming assemblies spaced apart along the width direction of the electrode strip.

[0018] In some embodiments of this application, the battery tab laser cutting equipment further includes a first negative pressure chamber mounted on the frame. The first negative pressure chamber is located above the cutting position and is disposed on the side of the strip cutting section facing the tab forming assembly. The side of the first negative pressure chamber facing the strip cutting section is provided with a plurality of first adsorption holes to form an adsorption surface for adsorbing the strip cutting section. The adsorption surface is in contact with the strip cutting section.

[0019] In some embodiments of this application, the battery tab laser cutting equipment further includes a waste transfer assembly located below the cutting position. The waste transfer assembly has a second negative pressure chamber, and a movable belt is located inside the second negative pressure chamber. The width extension direction of the belt is consistent with the width extension direction of the electrode material strip. A plurality of second adsorption holes are penetrating along the thickness direction of the belt, and the plurality of second adsorption holes are connected to the second negative pressure chamber and the external environment.

[0020] The second negative pressure chamber has a head end near the cutting channel and a tail end away from the cutting channel. The head end has a vertical guide portion that cooperates with the belt on the side facing the material strip cutting section, so that the belt is vertical when it passes the vertical guide portion. The belt and the material strip cutting section corresponding to the vertical guide portion are in contact, and are used to adsorb the waste material generated by the tab forming assembly cutting the tab area.

[0021] The gap between the head end and the first negative pressure chamber forms a cutting channel for the tab forming assembly to cut the tab region, and the material strip cutting part and the position corresponding to the cutting channel form the cutting position.

[0022] In some embodiments of this application, the second negative pressure chamber includes a housing mounted on the frame, the housing being connected to a negative pressure pump, and the housing having an opening extending from the head end to the tail end on the side facing the material belt cutting section, so that a portion of the belt is exposed through the opening;

[0023] The head end is provided with a driven roller that cooperates with the belt, and the tail end is provided with a drive roller for driving the belt to move in a clockwise direction, so that the waste material moves with the belt to the drive roller and separates from the belt;

[0024] The box is inclined from top to bottom away from the material strip cutting section.

[0025] In some embodiments of this application, the winding assembly includes a winding roller, and a winding motor is provided on the frame to drive the winding roller to rotate, the winding motor being electrically connected to the control system.

[0026] In some embodiments of this application, the battery tab laser cutting equipment further includes a correction component disposed between the tension swing roller assembly and the tab forming assembly;

[0027] The correction assembly includes a correction frame, which has a first correction roller and a second correction roller spaced apart along the moving direction of the electrode strip. The electrode strip passes sequentially around the lower end of the first correction roller and the upper end of the second correction roller.

[0028] The frame is equipped with a correction motor for driving the correction frame to rotate along the horizontal plane, and a correction sensor for collecting the position information of the electrode strip. The correction sensor and the correction motor are both electrically connected to the control system. The control system receives the position information of the electrode strip and controls the correction motor to rotate.

[0029] Compared with the prior art, the beneficial effects of this embodiment of the battery tab laser cutting equipment are as follows: This solution introduces a tension swing roller assembly during the tab cutting process. When the tension swing roller assembly is in a preset position, it provides a preset tension value to the electrode strip. A position detection assembly collects the angle information of the tension swing roller assembly in real time. When the tension swing roller assembly deviates from the preset position, it indicates that the tension in the system is fluctuating. The control system, based on the angle information of the tension swing roller assembly collected by the position detection assembly, controls the winding assembly to adjust the winding speed of the electrode strip, making the winding speed and unwinding speed of the electrode strip tend to be consistent, and making the tension swing roller assembly as close as possible to the preset position, thereby ensuring the stability of the electrode strip tension in the system, ensuring the cutting accuracy of the tab, and improving product quality. Attached Figure Description

[0030] Figure 1 This is a schematic diagram showing the trend of the electrode material strip of this utility model;

[0031] Figure 2 This is a schematic diagram of the unwinding assembly structure of this utility model;

[0032] Figure 3 This is a schematic diagram of the tension swing roller assembly of this utility model;

[0033] Figure 4 This is a schematic diagram showing the connection relationship between the tension swing roller assembly and the correction assembly of this utility model;

[0034] Figure 5 This is a schematic diagram of the correction component structure of this utility model;

[0035] Figure 6 This is a schematic diagram showing the cooperation relationship between the auxiliary cutting component, the tab forming component, and the waste transfer component of this utility model;

[0036] Figure 7 This utility model Figure 6 Enlarged schematic diagram of the structure at point A in the middle;

[0037] Figure 8 This is another perspective schematic diagram showing the cooperative relationship between the auxiliary cutting component, the tab forming component, and the waste transfer component of this utility model;

[0038] Figure 9 This utility model Figure 8 Enlarged schematic diagram of the structure at point B;

[0039] Figure 10 A schematic diagram showing the location of the collection box in this utility model;

[0040] Figure 11 This is a schematic diagram of the winding assembly structure of this utility model.

[0041] In the diagram, 1 is the unwinding assembly; 11 is the unwinding roller.

[0042] 2. Tension swing roller assembly; 21. Tension swing frame; 22. First guide roller; 23. Second guide roller; 24. Tension cylinder; 25. Third guide roller; 26. Fourth guide roller; 27. Fifth guide roller; 28. Sixth guide roller;

[0043] 3. Rewinding assembly; 31. Rewinding roller;

[0044] 4. Auxiliary cutting assembly; 41. Feed roller; 411. First guide surface; 42. Discharge roller; 421. Second guide surface;

[0045] 5. Electrode forming assembly; 51. Laser-cut part; 52. Bracket;

[0046] 6. First negative pressure chamber; 61. First adsorption hole; 62. Adsorption surface;

[0047] 7. Waste transfer assembly; 71. Second negative pressure chamber; 711. Box body; 712. Opening; 72. Belt; 721. Second suction hole; 73. Guide frame; 74. Driven roller; 75. Drive roller;

[0048] 8. Correction assembly; 81. Correction frame; 82. First correction roller; 83. Second correction roller; 84. Correction sensor;

[0049] 9. Electrode sheet material belt; 10. Collection box. Detailed Implementation

[0050] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0051] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," and "bottom," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as an obstruction of this utility model. It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms; these terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0052] like Figures 1-11 As shown in the embodiment of this application, a battery tab laser cutting device is proposed, including a frame with a first end and a second end arranged opposite to each other along the moving direction of the electrode strip 9. The device includes an unwinding assembly 1 located at the first end, used to release the electrode strip 9; a tension oscillating roller assembly 2 with a preset position, which provides a preset tension to the electrode strip 9 when in the preset position; a position detection assembly for real-time acquisition of the angle information of the tension oscillating roller assembly 2; a tab forming assembly 2 for cutting the tab area at the edge of the electrode strip 9 to form a tab; a winding assembly 3 located at the second end, used to wind up the cut electrode strip 9; and a control system. The position detection assembly and the winding assembly 3 are both electrically connected to the control system, which receives the angle information and adjusts the winding speed of the winding assembly 3.

[0053] In this embodiment, during the cutting process of the electrode strip 9, if the winding speed and unwinding speed are consistent, the tension swing roller assembly 2 is in a preset position and the tension of the electrode strip 9 in the system is a preset value. When the winding speed in the system is less than the unwinding speed, the tension of the strip decreases, causing the tension of the electrode strip 9 to decrease. The tension swing roller assembly 2 deviates from the preset position and swings to one side. The control system receives the angle information of the tension swing roller assembly 2 collected by the position detection component, and then controls the winding assembly 3 to increase the winding speed of the electrode strip 9, so that the winding speed and unwinding speed of the electrode strip 9 are as consistent as possible. During this process, the position detection component collects the angle information of the tension swing roller assembly 2. When the tension swing roller assembly 2 returns to the preset position, the tension of the electrode strip 9 in the system synchronously returns to the preset value. When the winding speed in the system is greater than the unwinding speed... When the tension of the strip increases, the tension of the electrode strip 9 in the system increases, causing the tension roller assembly 2 to deviate from the preset position and swing to the other side. The control system receives the angle information of the tension roller assembly 2 collected by the position detection component, and then controls the winding assembly 3 to reduce the winding speed of the electrode strip 9, so that the winding speed and unwinding speed of the electrode strip 9 are as consistent as possible. During this process, the position detection component collects the angle information of the tension roller assembly 2. When the tension roller assembly 2 returns to the preset position, the tension of the electrode strip 9 in the system returns to the preset value synchronously. In this embodiment, the control system realizes real-time dynamic adjustment of the tension of the electrode strip 9 in the system, so as to ensure that the tension in the system is as close as possible to the preset value during the electrode tab cutting process, avoid tension fluctuations in the system, improve the cutting accuracy of the electrode tab, and ensure product quality.

[0054] In some embodiments of this application, such as Figure 3 , Figure 4 As shown, the tension swing roller assembly 2 includes a tension swing frame 21, the upper end of which is rotatably mounted on the frame. The tension swing frame 21 is provided with a guide roller group for the electrode strip 9 to pass around. The lower end of the tension swing frame is connected to a tension mechanism, which provides a preset tension value and keeps the tension swing frame 21 in a preset position. The position detection assembly includes an angle sensor provided on the tension swing frame 21. The angle sensor is used to collect the angle information of the tension swing frame 21 in real time and is connected to the control system.

[0055] In some embodiments of this application, the guide roller assembly includes a first guide roller 22 and a second guide roller 23 spaced apart vertically. Both the first guide roller 22 and the second guide roller 23 are rotatably mounted on the tension swing frame 21. Figure 4As shown, the tension roller assembly 2 also includes a third guide roller 25, a fourth guide roller 26, a fifth guide roller 27, and a sixth guide roller 28 rotatably mounted on the frame. After the electrode strip 9 is released by the unwinding assembly 1, it passes sequentially through the third guide roller 25, the fourth guide roller 26, the second guide roller 23, the fifth guide roller 27, the first guide roller 22, and the sixth guide roller 28; as shown... Figure 3 As shown, the tension mechanism includes a tension cylinder 24 (the tension cylinder 24 is connected to a pneumatic control system). The cylinder body of the tension cylinder 24 is rotatably mounted on the frame, and the telescopic end of the tension cylinder 24 is rotatably mounted on the tension swing frame 21. In this scheme, the pneumatic control system adjusts the air pressure inside the tension cylinder 24 to a preset value, so that the tension cylinder 24 applies a preset thrust to the tension swing frame 21 and puts the tension swing frame 21 in a preset position, so that the tension of the electrode strip 9 in the system is at the preset value.

[0056] When the winding speed of the electrode strip 9 is less than the unwinding speed, the tension on the electrode strip 9 in the system decreases, and the tension cylinder 24 pushes the tension swing frame 21 to swing to one side (at this time, the retractable end of the tension cylinder 24 extends slightly, the air pressure inside the tension cylinder 24 decreases, and the force between the tension cylinder 24 and the tension swing frame 21 decreases). At this time, the tension on the electrode strip 9 in the system is less than the preset value. When the winding speed of the electrode strip 9 is greater than the unwinding speed, the tension on the electrode strip 9 in the system increases, and the electrode strip 9 will force the tension swing frame 21 to swing to the other side and squeeze the tension cylinder 24, which increases the air pressure inside the tension cylinder 24 (the retractable end of the tension cylinder 24 contracts slightly, and the force between the tension cylinder 24 and the tension swing frame 21 increases). At this time, the tension on the electrode strip 9 in the system is greater than the preset value. An angle sensor installed on the tension swing frame 21 detects a change in the angle of the tension swing frame 21. The control system controls the winding speed of the winding assembly 3, reducing the deviation between the winding speed and the unwinding speed, so that the two tend to approach or remain consistent. This causes the tension swing frame 21 to return to the preset position, and the air pressure in the tension cylinder 24 also returns to the preset level. Ultimately, the tension on the electrode strip 9 approaches the preset value.

[0057] In some embodiments of this application, such as Figure 6 , Figure 8As shown, the battery tab laser cutting equipment also includes an auxiliary cutting component 4. The auxiliary cutting component 4 includes a feed roller 41 and a discharge roller 42 arranged at intervals. Both the feed roller 41 and the discharge roller 42 are rotatably mounted on the frame. The feed roller 41 has a first guide surface 411 facing the first end, and the discharge roller 42 has a second guide surface 421 facing the first end. The electrode strip 9 passes over the first guide surface 411 and the second guide surface 421 from top to bottom. The electrode strip 9 located between the first guide surface 411 and the second guide surface 421 constitutes the strip cutting section. The strip cutting section has a cutting position corresponding to the tab forming assembly 2. The first guide surface 411 and the second guide surface 421 overlap in the vertical projection so that the strip cutting section is vertical. That is, the tab forming assembly 2 cuts the strip cutting section in a vertical state. On the one hand, this helps to improve the cutting accuracy of the tab, and on the other hand, it can better separate the waste generated during the tab cutting process from the electrode strip 9 (since the electrode strip 9 is vertical, under the action of gravity, the waste generated during cutting can be easily separated from the electrode strip 9 body).

[0058] In some embodiments of this application, the tab forming assembly 2 is located on the side of the strip cutting section facing the first end. Two tab forming assemblies 2 are provided, and the two tab forming assemblies 2 are spaced apart along the width direction of the electrode strip 9. Figure 6 As shown, the tab forming assembly 2 includes a bracket 52 and laser cutting parts 51 mounted on the bracket 52. The two laser cutting parts 51 correspond to the two side edges of the electrode strip 9 along the width direction (that is, the tab area), and are used to cut the two sides of the electrode strip 9 to form tabs on the two sides of the electrode strip 9 along the width direction.

[0059] In some embodiments of this application, such as Figure 6 , Figure 7 , Figure 8 As shown, the battery tab laser cutting equipment also includes a first negative pressure chamber 6 (connected to a negative pressure pump) mounted on the frame. The first negative pressure chamber 6 is located on the side of the strip cutting section facing the tab forming assembly 2. The first negative pressure chamber 6 is located above the cutting position. The side of the first negative pressure chamber 6 facing the strip cutting section has multiple first adsorption holes 61, forming an adsorption surface 62 for adsorbing the strip cutting section. The adsorption surface 62 is in contact with the strip cutting section. In this embodiment, in order to further improve the cutting accuracy of the tab, the first negative pressure chamber 6 is set above the cutting position and the adsorption surface 62 of the first negative pressure chamber 6 facing the strip cutting section is in contact with the strip cutting section. When the strip cutting section is running, it is adsorbed onto the adsorption surface 62 (e.g., ...). Figure 8 As shown, the strip cutting section moves smoothly from top to bottom along the adsorption surface 62 during operation. Under the action of negative pressure in the first negative pressure chamber 6, the swaying of the strip cutting section during operation is effectively constrained and limited, thereby improving the cutting accuracy of the tab.

[0060] In some embodiments of this application, such as Figure 7 As shown, the battery tab laser cutting equipment also includes a waste transfer assembly 7 located below the cutting position. The waste transfer assembly 7 has a second negative pressure chamber 71, within which is a movable belt 72. The width extension direction of the belt 72 is consistent with the width extension direction of the electrode material strip 9. Multiple second adsorption holes 721 penetrate along the thickness direction of the belt 72, connecting the second negative pressure chamber 71 to the external environment. The second negative pressure chamber 71 has a head end near the cutting channel and a tail end away from the cutting channel. The head end, facing the material strip cutting section, has a vertical guide portion that cooperates with the belt 72, making the belt 72 vertical where it passes the vertical guide portion. The belt 72 and the material strip cutting section corresponding to the vertical guide portion are in contact, used to adsorb waste generated by the tab forming assembly 2 cutting the tab area. Figure 8 As shown, the gap between the head end and the first negative pressure chamber 6 forms a cutting channel for the tab forming assembly 2 to cut the tab area.

[0061] In this embodiment, the first negative pressure chamber 6 located above the cutting channel is used to adsorb and constrain the electrode strip 9 to be cut, thus limiting its shaking. After the electrode strip 9 is cut at the cutting position, the generated waste will fall downwards. Figure 8 As shown, since the belt 72 corresponding to the vertical guide is in a vertical state and is in contact with the electrode material belt 9, the belt 72 is provided with a second adsorption hole 721 that communicates with the second negative pressure chamber 71. Under the action of negative pressure, the waste generated during the electrode cutting is adsorbed on the surface of the belt 72, thereby separating the waste generated during cutting from the electrode material belt 9 body. The waste adsorbed on the surface of the belt 72 moves synchronously with the belt 72, thereby achieving effective and directional collection of the waste generated during the electrode cutting.

[0062] In some embodiments of this application, a specific structure of the second negative pressure chamber 71 is provided, such as... Figure 7 As shown, the device includes a housing 711 mounted on a frame, connected to a negative pressure pump (the negative pressure pump is used to maintain a certain level of negative pressure inside the housing 711). The housing 711 has an opening 712 extending from the head end to the tail end on the side facing the belt cutting section, allowing a portion of the belt 72 to be exposed through the opening 712. The head end is provided with two driven rollers 74 (the two driven rollers 74 are spaced apart) that cooperate with the belt 72, and the tail end is provided with a drive roller 75 (connected to a motor) for driving the belt 72 to move clockwise. Figure 9As shown, a guide frame 73 is provided on the side of the opening 712 of the housing 711 and below the driven roller 74. The driven roller 74 near the electrode strip 9 and the side edge of the guide frame 73 near the electrode strip 9 are vertically aligned (the guide frame 73 and the driven roller 74 near the electrode strip 9 constitute a vertical guide). This ensures that the belt 72 is vertical when passing through the driven roller 74 and the guide frame 73, resulting in a better fit between the belt 72 and the electrode strip 9, thus achieving better control of the output during cutting. The waste material is adsorbed and transferred to the surface of the belt 72 as much as possible. When the waste material adsorbed on the surface of the belt 72 moves to the drive roller 75, the second adsorption hole 721 on the belt 72 corresponding to the drive roller 75 is no longer connected to the second negative pressure chamber 71 (that is, the second adsorption hole 721 at this part is blocked by the roller body of the drive roller 75). Therefore, the waste material adsorbed on the surface of the belt 72 is no longer subject to negative pressure and falls off the surface of the belt 72 under the action of gravity, thus completing the separation from the belt 72. Ideally, such as... Figure 10 As shown, a collection box 10 for collecting waste is provided below the box body 711 (to facilitate the unified collection of waste). Figure 8 As shown, in order to further improve the cleaning effect of waste on the electrode strip 9, the box 711 in this solution is set to be inclined from top to bottom away from the strip cutting part, that is, only the belt 72 corresponding to the vertical guide part and the electrode strip 9 are in contact (to adsorb the waste on the electrode strip 9 and transfer it to the surface of the belt 72). Then, under the operation of the belt 72, the waste adsorbed on the surface of the belt 72 gradually moves away from the electrode strip 9, until it reaches the drive roller 75 and loses the negative pressure adsorption force, and separates from the belt 72 (falling into the collection box 10).

[0063] In some embodiments of this application, such as Figure 11 As shown, the winding assembly 3 includes a winding roller 31. A winding motor for driving the winding roller 31 to rotate is provided on the frame. The winding motor is electrically connected to the control system. The control system controls the speed of the winding motor according to the angle information parameters of the tension swing roller assembly 2 collected by the position detection assembly, so that the winding speed and unwinding speed of the electrode strip 9 are close to the same, thereby reducing the tension fluctuation of the electrode strip 9 in the system.

[0064] In some embodiments of this application, such as Figure 4 , Figure 5As shown, the battery tab laser cutting equipment also includes a correction component 8 located between the tension swing roller assembly 2 and the tab forming assembly 2; the correction component 8 includes a correction frame 81, the correction frame 81 having a first correction roller 82 and a second correction roller 83 spaced apart along the moving direction of the electrode strip 9, the electrode strip 9 sequentially passing over the lower end of the first correction roller 82 and the upper end of the second correction roller 83; the frame is equipped with a correction motor for driving the correction frame 81 to rotate along the horizontal plane, and the frame is equipped with a correction sensor 84 (a CCD camera, which detects the position of the edge of the electrode strip 9 in real time by imaging, two correction sensors 84 are provided, located at the two side edges of the electrode strip 9 respectively) for collecting the position information of the electrode strip 9, the correction sensor 84 and the correction motor are both electrically connected to the control system, the control system receives the position information of the electrode strip 9 and controls the correction motor to rotate. First, the position information of the correction sensor 84 and the electrode strip 9 is initially set. During operation, the correction sensor 84 collects the position information of the electrode strip 9 in real time and transmits the position information to the control system. When the correction sensor 84 detects that the edge of the electrode strip 9 deviates significantly from the preset position, the control system controls the correction motor to start and drives the correction frame 81 to rotate along the horizontal plane to correct the electrode strip 9, so as to ensure that the electrode strip 9 can be stably conveyed along the predetermined path, thereby effectively preventing the electrode strip 9 from deviating from the predetermined trajectory during the conveying process, and ensuring the cutting accuracy during subsequent electrode tab cutting.

[0065] The working process of this utility model is as follows: the electrode strip 9 is released from the unwinding assembly 1 and, after being guided by the tension swing roller assembly 2, moves to the auxiliary cutting assembly 4, where it is cut by the electrode tab forming assembly 2 to form electrode tabs in the electrode tab areas on both sides of the electrode strip 9; during the cutting process, the position detection assembly collects the angle information of the tension swing roller assembly 2 in real time, and the control system receives the angle information of the tension swing roller assembly 2 and controls the winding speed of the winding assembly 3 to make the winding speed and unwinding speed of the electrode strip 9 in the system as close as possible to the same, thereby reducing the fluctuation of the tension on the electrode strip 9 during the electrode tab cutting process; the cutting accuracy of the electrode tab is further improved by setting the first negative pressure chamber 6 and the correction assembly 8; the waste material generated during cutting is separated from the electrode strip 9 body by the waste material transfer assembly 7 to prevent it from being mixed in with the electrode strip 9 during subsequent winding and causing hidden dangers.

[0066] In summary, this utility model embodiment provides a battery tab laser cutting device. This solution introduces a tension roller assembly 2 during the tab cutting process. When the tension roller assembly 2 is in a preset position, it provides a preset tension value to the electrode strip 9. A position detection component collects the angle information of the tension roller assembly 2 in real time. When the tension roller assembly 2 deviates from the preset position, it indicates that the tension in the system is fluctuating. The control system, based on the angle information of the tension roller assembly 2 collected by the position detection component, controls the winding assembly 3 to adjust the winding speed of the electrode strip 9, thereby increasing the winding speed of the electrode strip 9. The tension and unwinding speeds are kept consistent, and the tension roller assembly 2 is brought as close as possible to the preset position to ensure the stability of the tension of the electrode strip 9 in the system, ensure the cutting accuracy of the electrode tabs, and improve product quality. At the same time, a waste material transfer assembly 7 is set to transfer the waste generated during cutting from the surface of the electrode strip 9 to ensure the cleanliness of the surface of the electrode strip 9 (so as to avoid the potential hazards caused by waste being mixed in the electrode strip 9 during subsequent winding). By setting a first negative pressure chamber 6, the electrode strip 9 is subjected to negative pressure adsorption to avoid the electrode strip 9 from shaking during the cutting process, and further improve the cutting accuracy of the electrode tabs.

[0067] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A laser cutting device for battery tabs, comprising a frame having a first end and a second end disposed opposite to each other along the moving direction of the electrode strip (9), characterized in that, include: An unwinding assembly (1) is provided at the first end, and the unwinding assembly (1) is used to release the electrode strip (9); The tension swing roller assembly (2) has a preset position. When the tension swing roller assembly (2) is in the preset position, it provides a preset tension to the electrode strip (9). A position detection component is used to collect the angle information of the tension swing roller assembly (2); The tab forming assembly (5) is used to cut the tab area at the edge of the electrode strip (9) to form a tab; A winding assembly (3) is provided at the second end, and the winding assembly (3) is used to wind up the cut electrode strip (9); as well as The control system is electrically connected to both the position detection component and the winding component (3). The control system is used to receive the angle information and adjust the winding speed of the winding component (3).

2. The battery tab laser cutting equipment according to claim 1, characterized in that, The tension swing roller assembly (2) includes a tension swing frame (21), one end of which is rotatably mounted on the frame. The tension swing frame (21) is provided with a guide roller group for the electrode strip (9) to pass around. The other end of the tension swing frame (21) is connected to a tension mechanism, which positions the tension swing frame (21) in the preset position. The position detection component includes an angle sensor mounted on the tension swing frame (21), and the angle sensor is connected to the control system.

3. The battery tab laser cutting equipment according to claim 2, characterized in that, The guide roller assembly includes a first guide roller (22) and a second guide roller (23) arranged at an upper and lower interval, and both the first guide roller (22) and the second guide roller (23) are rotatably mounted on the tension swing frame (21); The tension mechanism includes a tension cylinder (24), the cylinder body of which is rotatably mounted on the frame, and one retractable end of which is rotatably mounted on the tension swing frame (21).

4. The battery tab laser cutting equipment according to claim 1, characterized in that, The battery electrode laser cutting equipment also includes an auxiliary cutting component (4), which includes a feeding roller (41) and a discharging roller (42) arranged at intervals. The feeding roller (41) and the discharging roller (42) are rotatably mounted on the frame. The feeding roller (41) has a first guide surface (411) facing the first end, and the discharging roller (42) has a second guide surface (421) facing the first end. The electrode strip (9) passes around the first guide surface (411) and the second guide surface (421) from top to bottom. The electrode strip (9) located between the first guide surface (411) and the second guide surface (421) constitutes a strip cutting section. The strip cutting section has a cutting position corresponding to the tab forming assembly (5). The first guide surface (411) and the second guide surface (421) overlap in the vertical projection so that the strip cutting section is vertical.

5. The battery tab laser cutting equipment according to claim 4, characterized in that, The tab forming assembly (5) is located on the side of the strip cutting section facing the first end. There are two tab forming assemblies (5), and the two tab forming assemblies (5) are spaced apart along the width direction of the electrode strip (9).

6. The battery tab laser cutting equipment according to claim 4, characterized in that, The battery tab laser cutting equipment also includes a first negative pressure chamber (6) installed on the frame. The first negative pressure chamber (6) is located above the cutting position. The first negative pressure chamber (6) is located on the side of the material strip cutting part facing the tab forming assembly (5). The first negative pressure chamber (6) is provided with a plurality of first adsorption holes (61) on the side of the material strip cutting part to form an adsorption surface (62) for adsorbing the material strip cutting part. The adsorption surface (62) is in contact with the material strip cutting part.

7. The battery tab laser cutting equipment according to claim 6, characterized in that, The battery tab laser cutting equipment also includes a waste transfer assembly (7) located below the cutting position. The waste transfer assembly (7) has a second negative pressure chamber (71). The second negative pressure chamber (71) has a movable belt (72). The width extension direction of the belt (72) is consistent with the width extension direction of the electrode material belt (9). A plurality of second adsorption holes (721) are penetrating along the thickness direction of the belt (72). The plurality of second adsorption holes (721) are connected to the second negative pressure chamber (71) and the external environment. The second negative pressure chamber (71) has a head end close to the first negative pressure chamber (6) and a tail end away from the first negative pressure chamber (6). The head end has a vertical guide portion that cooperates with the belt (72) on the side facing the material strip cutting part, so that the belt (72) is vertical when it passes through the vertical guide portion. The belt (72) corresponding to the vertical guide portion and the material strip cutting part are in contact, and are used to adsorb the waste generated by the tab forming assembly (5) cutting the tab area; The gap between the head end and the first negative pressure chamber (6) forms a cutting channel for the tab forming assembly (5) to cut the tab region, and the material strip cutting part and the position corresponding to the cutting channel form the cutting position.

8. The battery tab laser cutting equipment according to claim 7, characterized in that, The second negative pressure chamber (71) includes a housing (711) mounted on the frame, the housing (711) being connected to a negative pressure pump, and the housing (711) having an opening (712) extending from the head end to the tail end on the side facing the material belt cutting section, so that a portion of the belt (72) is exposed through the opening (712). The head end is provided with a driven roller (74) that cooperates with the belt (72), and the tail end is provided with a drive roller (75) for driving the belt (72) to move in a clockwise direction, so that the waste material moves with the belt (72) to the drive roller (75) and separates from the belt (72). The box (711) is inclined from top to bottom toward the material strip cutting section.

9. The battery tab laser cutting equipment according to claim 1, characterized in that, The winding assembly (3) includes a winding roller (31), and the frame is provided with a winding motor for driving the winding roller (31) to rotate. The winding motor is electrically connected to the control system.

10. The battery tab laser cutting equipment according to claim 1, characterized in that, The battery tab laser cutting equipment also includes a correction component (8) disposed between the tension swing roller assembly (2) and the tab forming assembly (5); The correction assembly (8) includes a correction frame (81), which has a first correction roller (82) and a second correction roller (83) spaced apart along the moving direction of the electrode strip (9). The electrode strip (9) passes around the lower end of the first correction roller (82) and the upper end of the second correction roller (83) in sequence. The frame is equipped with a correction motor for driving the correction frame (81) to rotate along the horizontal plane. The frame is also equipped with a correction sensor (84) for collecting the position information of the electrode strip (9). The correction sensor (84) and the correction motor are electrically connected to the control system. The control system receives the position information of the electrode strip (9) and controls the correction motor to rotate.

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