Pole piece cutting assembly and pole piece cutting device
By using laser technology for interleaved cutting and edge cutting in pole cutting assembly, the problems of low efficiency and insufficient precision of pole cutting are solved, and efficient and accurate pole separation and material saving are achieved.
Patent Information
- Application Number
- CN202422338659.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-24
AI Technical Summary
In the existing pole sheet manufacturing process, the pole sheet needs to go through two cutting processes: die-cutting and stripping. The steps are complicated, the cutting efficiency is low, and mechanical cutting is prone to burrs and material dropping, which affects the cutting accuracy.
The pole-sheet cutting assembly including a first laser, a second laser and a third laser are adopted. The first laser and the second laser cut the pole ears in the coating area and the white space area of the pole, and the third laser cuts the edge area to simultaneously cut out the pole ears and separate the pole ears, thereby improving the cutting efficiency and accuracy.
It improves the efficiency and accuracy of the pole cutting, reduces material waste, reduces production costs, and avoids the occurrence of burrs and material dropouts.
Smart Images
Figure CN223129642U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the technical field of batteries, and in particular, to a pole piece cutting assembly and a pole piece cutting device. Background Art
[0002] The pole piece is a core component of the battery. The pole piece is usually formed by coating a mixture of active materials, conductive agents, and binders on a current collector such as copper foil or aluminum foil. The pole piece needs to be processed through multiple processes such as stirring, coating, rolling, die-cutting, and slitting to form the final shape.
[0003] In the specific manufacturing process of the pole piece, the slurry is first obtained through stirring, then the slurry is coated on the current collector through coating, and then the coated pole piece is rolled through rolling. Furthermore, the pole ears are cut out on the rolled pole piece through die-cutting, and finally the pole piece is cut into strips through slitting.
[0004] However, in the existing pole piece manufacturing process, the pole piece needs to go through two cutting processes of die-cutting and slitting successively, with cumbersome steps and low cutting efficiency. Moreover, during slitting, a slitting knife is usually used for mechanical cutting, which is prone to burrs and material loss, affecting the cutting accuracy of the pole piece. Therefore, how to improve the efficiency and accuracy of pole piece cutting has become a technical problem to be solved. Summary of the Utility Model
[0005] In view of the above problems, the embodiments of the present application provide a pole piece cutting assembly. The pole piece cutting assembly is provided with a first laser, a second laser, and a third laser at the same time. The first laser and the second laser can cut out the mutually staggered first pole ears and second pole ears in the blank area between the first coating area and the second coating area of the pole piece, and the third laser cuts out the edge area of the pole piece, so that the first pole ears and the second pole ears can be cut out at the same time and the pole piece can be divided into two pole piece strips, improving the efficiency and accuracy of pole piece cutting and reducing material waste. The embodiments of the present application also provide a pole piece cutting device including the pole piece cutting assembly at the same time.
[0006] In one aspect of the embodiments of the present application, a pole piece cutting assembly is provided. The pole piece cutting assembly includes a first laser, a second laser, and a third laser. The first laser, the second laser, and the third laser are used to face the coating surface of the pole piece to cut the conveyed pole piece through the emitted laser. The lasers emitted by the first laser and the second laser can move along a first direction, and the first direction is perpendicular to the conveying direction of the pole piece. When the pole piece is conveyed, the lasers emitted by the first laser and the second laser cut out the mutually staggered first pole ears and second pole ears in the blank area between the first coating area and the second coating area of the pole piece. The laser emitted by the third laser is in a fixed state in the first direction to linearly cut out the edge area of the pole piece when the pole piece is conveyed, and the edge area and the blank area are located on opposite sides of the second coating area.
[0007] This pole piece cutting assembly can cut out the first pole ear and the second pole ear simultaneously and divide the pole piece into two pole piece strips, improving the efficiency and precision of pole piece cutting and reducing material waste.
[0008] In an alternative embodiment, the edge region includes an edge coating region and an edge blank region, and the edge coating region is adjacent to the second coating region.
[0009] In this embodiment, the edge region cut by the third laser includes both the redundant blank region and the redundant coating region, i.e., the edge coating region, ensuring the dimensional accuracy of the remaining second coating region.
[0010] In an alternative embodiment, the first laser and the second laser can move along the first direction so that the laser beams emitted by the first laser and the second laser move along the first direction.
[0011] In this embodiment, the first laser and the second laser move the laser beam in the first direction by translation, which can more precisely control the movement range of the laser beam. The movement process is simple and reliable, the movement of the laser beam is smoother, and it is easier to control the movement speed of the laser beam, making the cutting profile of the laser beam more accurate.
[0012] In an alternative embodiment, the pole piece cutting assembly further includes a bracket. A sliding portion is provided on the first laser, and a sliding rail is provided on the bracket. The track direction of the sliding rail is the first direction. The sliding portion is slidably connected to the sliding rail so that the sliding portion can slide along the first direction.
[0013] In this embodiment, the first laser moves in the first direction through the cooperation of the sliding portion and the sliding rail, and the movement process is smooth without jamming, which is more convenient to control.
[0014] In an alternative embodiment, the sliding portion is a convex block, and the sliding rail is a chute. The convex block is embedded in the chute and can slide along the first direction in the chute.
[0015] In this embodiment, the sliding portion is a convex block, which is convenient to process. The convex block is embedded in the chute for sliding, and it is not easy to fall off during the sliding process, with high reliability.
[0016] In an alternative embodiment, the sliding portion is a through hole, and the sliding rail is a sliding shaft. The axial direction of the sliding shaft is the first direction. The aperture of the through hole is larger than the shaft diameter of the sliding shaft. The through hole is sleeved on the sliding shaft and can slide along the first direction.
[0017] In this embodiment, the sliding portion is a through hole, which is convenient to process and occupies little space. The sliding rail is a sliding shaft, with a simple structure and easy to process. The through hole is sleeved on the sliding shaft for sliding, and it is not easy to fall off during the sliding process, and the sliding is smoother.
[0018] In an alternative embodiment, the first laser includes a galvanometer mirror. The laser emitted by the first laser passes through the galvanometer mirror and is directed towards the pole piece. The galvanometer mirror rotates to move the laser emitted by the first laser in a first direction. And / or, the second laser includes a galvanometer mirror. The laser emitted by the second laser passes through the galvanometer mirror and is directed towards the pole piece. The galvanometer mirror rotates to move the laser emitted by the second laser in a first direction.
[0019] In this embodiment, the lasers emitted by the first laser and the second laser are moved by the rotation of the galvanometer mirror to achieve the purpose of scanning and cutting. Its structure is simple, easy to install, and has higher cutting efficiency and cutting accuracy.
[0020] In an alternative embodiment, the first laser, the second laser, and the third laser have a spacing in the first direction and also have a spacing in the conveying direction of the pole piece.
[0021] In this embodiment, the first laser, the second laser, and the third laser are spaced apart in the conveying direction of the pole piece, and can be installed staggeredly. The installation space is sufficient and mutual interference is not likely to occur.
[0022] Another aspect of the embodiments of the present application provides a pole piece cutting device, which includes a plurality of conveying rollers and the pole piece cutting assembly as described above. The plurality of conveying rollers form a conveying roller path to convey the pole piece. The first laser, the second laser, and the third laser of the pole piece cutting assembly face the coating surface of the pole piece, and when the pole piece is conveyed, the pole piece is cut into a first pole piece strip with a first pole tab and a second pole piece strip with a second pole tab.
[0023] This pole piece cutting device can directly cut out two pole piece strips with pole tabs. The steps are simple and the cutting efficiency is higher. Moreover, the laser cutting has higher stability, is convenient for precise control, and is also convenient for increasing the cutting speed. The cutting accuracy and cutting efficiency are higher. During the laser cutting process, no burrs or material dropping will occur, reducing material waste and lowering production costs.
[0024] In an alternative embodiment, in the conveying direction of the pole piece, a plurality of conveying rollers located behind the pole piece cutting assembly form a first roller path and a second roller path. The first roller path is used to convey the first pole piece strip, and the second roller path is used to convey the second pole piece strip.
[0025] In this embodiment, the cut first pole piece strip and second pole piece strip are separately conveyed by the first roller path and the second roller path, and the material receiving efficiency is higher.
[0026] In the pole piece cutting assembly and the pole piece cutting device provided by the embodiments of the present application, a first laser, a second laser, and a third laser are simultaneously arranged in the pole piece cutting assembly. The lasers emitted by the first laser and the second laser can move perpendicular to the conveying direction of the pole piece, so as to perform staggered cutting when the pole piece is conveyed, and staggered first pole ears and second pole ears are cut out in the blank area between the first coating area and the second coating area of the pole piece. The laser emitted by the third laser is set at a fixed point, so as to linearly cut out the edge area when the pole piece is conveyed. After the pole piece is cut by the three lasers, it is naturally divided into two pole piece strips with pole ears. The steps are simple and the cutting efficiency is high. Moreover, the setting of the edge area is equivalent to leaving a dimensional allowance for the pole piece, avoiding insufficient dimensions of the pole piece strip and making the dimensional accuracy of the cut pole piece strip higher. In addition, the laser cutting has higher stability, is convenient for precise control, and is also convenient for increasing the cutting speed, with higher cutting accuracy and cutting efficiency. During the laser cutting process, no burrs or material dropping will occur, reducing material waste and lowering production costs.
[0027] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to be able to understand the technical means of the embodiments of the present application more clearly, it can be implemented according to the content of the description. In order to make the above and other purposes, features, and advantages of the embodiments of the present application more obvious and understandable, the following specifically illustrates the embodiments of the present application. Description of the Drawings
[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0029] Figure 1 It is a schematic structural diagram of a pole piece cutting device including a pole piece cutting assembly provided by the embodiments of the present application.
[0030] Figure 2 It is a schematic diagram of the cutting positions of the lasers emitted by the first laser, the second laser, and the third laser involved in the embodiments of the present application on the pole piece.
[0031] Figure 3 It is a schematic structural diagram of a movable installation method of the first laser involved in the embodiments of the present application.
[0032] Figure 4 It is a schematic structural diagram of the pole piece before being cut involved in the embodiments of the present application.
[0033] Figure 5 It is a schematic structural diagram of the pole piece after being cut involved in the embodiments of the present application.
[0034] Reference numerals:
[0035] 10. First laser; 20. Second laser; 30. Third laser;
[0036] 40. Electrode tab; 41. First coating area; 42. Blank area; 421. First tab; 422. Second tab; 43. Second coating area; 44. Edge area; 441. Edge coating area; 442. Edge blank area; 45. First electrode tab strip; 46. Second electrode tab strip;
[0037] 50. Bracket; 60. Sliding part; 70. Slide rail;
[0038] 80. Conveyor roller;
[0039] 91. Unwinding mechanism; 92. Tape connecting platform; 93. Deviation rectifying mechanism; 94. CCD component; 95. Rewinding mechanism. Detailed implementation manners
[0040] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without making creative efforts belong to the scope of protection of this application.
[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0042] The terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other elements. The word "a" or "an" does not exclude the presence of a plurality.
[0043] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0044] As used herein, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.
[0045] The orientation terms used in the following descriptions are the directions shown in the figures, and do not limit the specific structures of the pole piece cutting assembly and the pole piece cutting device of the present application. For example, in the description of the present application, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.
[0046] In addition, expressions indicating directions such as the X direction, Y direction, and Z direction, which are used to explain the operations and structures of the components of the pole piece cutting assembly and the pole piece cutting device of this embodiment, are not absolute but relative. Although these indications are appropriate when the components of the pole piece cutting assembly and the pole piece cutting device are in the positions shown in the figures, when these positions change, these directions should have different interpretations to correspond to the change.
[0047] In addition, terms such as "first", "second", etc. in the description, claims, or the above-mentioned drawings of the present application are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.
[0048] In the description of the present application, unless otherwise specified, "a plurality of" means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups).
[0049] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a fixing member, such as a screw, bolt, or other fixing member; a physical connection can also be a detachable connection, such as a snap connection or a clamping connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. The "connection" or "coupling" of circuit structures can refer to not only a physical connection but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected, and it can also be the communication inside two components; a signal connection can refer to not only a signal connection through a circuit but also a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0050] The pole piece cutting assembly provided in this embodiment is as Figure 1 , Figure 2 and Figure 3 shown, Figure 1 is a schematic structural composition diagram of a pole piece cutting device including a pole piece cutting assembly provided by an embodiment of the present application, Figure 2 is a schematic diagram of the cutting positions of the lasers emitted by the first laser, the second laser, and the third laser involved in an embodiment of the present application on the pole piece, Figure 3 is a schematic structural diagram of a movable installation method of the first laser involved in an embodiment of the present application. The pole piece cutting assembly includes a first laser 10, a second laser 20, and a third laser 30.
[0051] The first laser 10, the second laser 20, and the third laser 30 are all laser elements for cutting the pole piece 40. The first laser 10, the second laser 20, and the third laser 30 can be installed on a support structure such as a bracket 50. After installation, the first laser 10, the second laser 20, and the third laser 30 face the coating surface of the pole piece 40 to cut the pole piece 40 in transit through the emitted laser.
[0052] In a specific implementation manner, the pole piece 40 can be conveyed in a flat manner, and the pole piece 40 passes through the space faced by the first laser 10, the second laser 20, and the third laser 30, so that the lasers emitted by the first laser 10, the second laser 20, and the third laser 30 can cut it during laser conveyance.
[0053] The coated surface of the electrode sheet 40 is the surface coated with the slurry. The coated surface of the electrode sheet 40 can face upward, and the first laser 10, the second laser 20, and the third laser 30 can be correspondingly arranged above the electrode sheet 40, and the first laser 10, the second laser 20, and the third laser 30 face the coated surface of the electrode sheet 40, so that the laser is emitted onto the coated surface and cuts the electrode sheet 40 during the conveyance of the electrode sheet 40.
[0054] The first laser 10 and the second laser 20 are movably mounted on the bracket 50, so that the laser emitted by the first laser 10 and the second laser 20 can move along a first direction, and the first direction is perpendicular to the conveyance direction of the electrode sheet 40. When the electrode sheet 40 is conveyed, the laser emitted by the first laser 10 and the second laser 20 cuts out the staggered first tabs 421 and second tabs 422 in the blank area 42 between the first coating area 41 and the second coating area 43 of the electrode sheet 40.
[0055] The laser emitted by the first laser 10 and the second laser 20 can move back and forth in the first direction, and the moving speed corresponds to the conveyance rate of the electrode sheet 40, and the moving amplitude corresponds to the size of the tabs, so that the first laser 10 cuts out a plurality of first tabs 421 along the first tab cutting trajectory, and the second laser 20 cuts out a plurality of second tabs 422 along the second tab cutting trajectory.
[0056] As Figure 2 、 Figure 4 and Figure 5 shown, Figure 4 FIG. is a schematic structural diagram of the electrode sheet involved in the embodiment of the present application before being cut. Figure 5 FIG. is a schematic structural diagram of the electrode sheet involved in the embodiment of the present application after being cut. Among them, the first tab 421 and the remaining first coating area 41 form the first electrode sheet strip 45, and the first tab cutting trajectory is equivalent to the side contour of the tab side of the first electrode sheet strip 45. The second tab 422 and the remaining second coating area 43 form the second electrode sheet strip 46, and the second tab cutting trajectory is the side contour of the tab side of the second electrode sheet strip 46.
[0057] In order to accurately control the cutting trajectories of the first laser 10 and the second laser 20, the activities of the first laser 10 and the second laser 20 can be controlled by a calculation unit such as an industrial control system, and a high-precision power component such as a servo motor can be used to provide power for their activities.
[0058] Since the first pole tab 421 and the second pole tab 422 are cut alternately in the blank area 42 between the first coating area 41 and the second coating area 43, the required width of the blank area 42 is small, that is, the distance between the first coating area 41 and the second coating area 43 is small, which can save the amount of foil used in the manufacture of the pole piece 40 and reduce the production cost. In addition, the small width of the blank area 42 can effectively extend the pole piece 40 in the previous rolling process, which can effectively prevent the occurrence of wrinkling and breaking of the pole tab.
[0059] There are many ways for the lasers emitted by the first laser 10 and the second laser 20 to move in the first direction. The laser movement can be either translation back and forth, or swing or rotate within a certain angle. Exemplarily, when the laser movement is translation, a feasible way is that the first laser 10 and the second laser 20 can move along the first direction, so that the lasers emitted by the first laser 10 and the second laser 20 move along the first direction.
[0060] In this method, the first laser 10 and the second laser 20 move the laser in the first direction by translation, which can more accurately control the activity range of the laser, and the activity process is simple and reliable. The movement process of the laser is smoother, and it is easier to control the movement speed of the laser, making the laser cutting contour more accurate.
[0061] When the laser moves in a manner of deflection or rotation within a certain angle, the first laser 10 and the second laser 20 can be deflected or rotated, or the laser heads emitting laser light in the first laser 10 and the second laser 20 can be deflected or rotated, without limitation.
[0062] The movement of the lasers emitted by the first laser 10 and the second laser 20 is specifically realized by the moving mechanism. Moreover, these moving mechanisms have high control accuracy and stability to ensure that the cutting paths of the first laser 10 and the second laser 20 are accurate.
[0063] There are many specific ways to set the movable mechanism. For example, when the movable mode is translation, the movable mechanism can be set as a linear guide structure, a ball screw structure, or a roller structure, etc. When the movable mode is deflection or rotation within a certain angle, the movable mechanism can be set as a hinge structure, a gear transmission structure, etc. In addition, the movable mechanisms of the first laser 10 and the second laser 20 can be completely the same or different.
[0064] The following is an illustrative description using an example in which the first laser 10 is moved by a linear guide rail structure. It should be understood that the second laser 20 may also be moved by a structure consistent with or similar to the following example.
[0065] One possible way is to Figure 3As shown, a sliding part 60 is provided on the first laser 10, and a slide rail 70 is provided on the bracket 50. The track direction of the slide rail 70 is the first direction. The sliding part 60 is slidably connected to the slide rail 70, so that the sliding part 60 can slide along the first direction.
[0066] In this way, the first laser 10 moves in the first direction through the cooperation of the sliding part 60 and the slide rail 70. The moving process is smooth without jamming, which is more convenient for control.
[0067] There are also many specific forms of the sliding part 60 and the slide rail 70. A feasible way is as Figure 3 shown. The sliding part 60 is a convex block, and the slide rail 70 is a chute. The convex block is embedded in the chute and can slide along the first direction in the chute.
[0068] In this way, the sliding part 60 is a convex block, which is convenient to process. The convex block is embedded in the chute and slides. It is not easy to fall off during the sliding process, and the reliability is high.
[0069] In another feasible way, the sliding part 60 can be a through hole, and the slide rail 70 can be a sliding shaft. The axial direction of the sliding shaft is the first direction. The aperture of the through hole is larger than the shaft diameter of the sliding shaft. The through hole is sleeved on the sliding shaft and can slide along the first direction.
[0070] In this way, the sliding part 60 is a through hole, which is convenient to process and occupies a small space. The slide rail 70 is a sliding shaft, with a simple structure and convenient for processing. The through hole is sleeved on the sliding shaft and slides. It is not easy to fall off during the sliding process, and the sliding is smoother.
[0071] Among them, the first laser 10 and the second laser 20 can be respectively connected to a power component, so that the emitted laser moves along the first direction under the drive of the power component. The power component can specifically be a motor or a hydraulic pump, etc. And the first laser 10 and the second laser 20 can be directly connected to the power component, or indirectly connected to the power component through transmission components such as connecting rods and gears.
[0072] In addition, the movement of the laser emitted by the first laser 10 and the second laser 20 in the first direction can be realized through a galvanometer. Specifically, the first laser 10 includes a galvanometer. The laser emitted by the first laser 10 is emitted to the pole piece 40 through the galvanometer. The galvanometer rotates to make the laser emitted by the first laser 10 move along the first direction. And / or the second laser 20 includes a galvanometer. The laser emitted by the second laser 20 is emitted to the pole piece 40 through the galvanometer. The galvanometer rotates to make the laser emitted by the second laser 20 move along the first direction.
[0073] The galvanometer is equivalent to a reflecting mirror, and the laser is reflected by the galvanometer onto the pole piece 40 for cutting. The galvanometer is connected to the driver and vibrates under the drive of the driver, causing the galvanometer to rotate within a certain angle range, thereby changing the incident angle and reflection angle of the laser on the galvanometer and enabling the laser to move in the first direction.
[0074] In this method, the lasers emitted by the first laser 10 and the second laser 20 move through the rotation of the galvanometer to achieve the purpose of scanning and cutting. Its structure is simple, easy to install, and has higher cutting efficiency and cutting accuracy.
[0075] The laser emitted by the third laser 30 is in a fixed state in the first direction. When the pole piece 40 is conveyed, the edge area 44 of the pole piece 40 is linearly cut. The edge area 44 and the blank area 42 are located on opposite sides of the second coating area 43.
[0076] In this embodiment, the edge area 44 is an area adjacent to the second coating area 43. The function of this edge area 44 is to leave a dimensional allowance for the pole piece 40 in the width direction of the pole piece 40, facilitating the guarantee of the dimensions of the first coating area 41 and the second coating area 43 when coating the slurry, and avoiding coating the slurry onto other parts during coating, and also ensuring the width of the remaining second coating area 43 when cutting the edge material.
[0077] Removing the edge area 44 is actually to remove the redundant area. In a specific implementation manner, the edge can include only the edge blank area 442, or can also include the redundant coating area connected to the second coating area 43, that is, as Figure 4 and Figure 5 shown, the edge area 44 includes the edge coating area 441 and the edge blank area 442, and the edge coating area 441 is adjacent to the second coating area 43.
[0078] In this method, the edge area 44 cut by the third laser 30 includes both the redundant blank area, that is, the edge blank area 442, and the redundant coating area, that is, the edge coating area 441, ensuring the dimensional accuracy of the remaining second coating area 43.
[0079] There are many installation methods for the third laser 30. For example, the third laser 30 can be detachably installed on the bracket 50 through connecting parts such as bolts and clamping structures and be in a fixed state after installation. The third laser 30 can also be movably installed on the bracket 50 and be fixed by structures such as limiters.
[0080] When the third laser 30 is in a fixed state, the laser emitted by the third laser 30 can be a fixed-point laser. When the pole piece 40 is conveyed, the laser emitted by the third laser 30 can cut off the edge area 44 of the pole piece 40 in a straight-line cutting manner. Among them, the cutting trajectory of the third laser 30 is also one side contour of the second pole piece strip 46, and this side contour is opposite to the contour of the second pole ear 422, that is, the second pole ear cutting trajectory of the second laser 20 and the cutting trajectory of the third laser 30 are the edge trajectories of the opposite two sides of the second pole piece strip 46.
[0081] In addition, when the first laser 10 and the second laser 20 can move along the first direction, the spacing between the first laser 10, the second laser 20 and the third laser 30 in the first direction can be adjusted by the movement of the first laser 10 and the second laser 20, so that pole piece strips of different specifications can be processed, improving the versatility. And, in some embodiments, the fixed state of the third laser 30 can also be released so that it can also move along the first direction, thereby adjusting the positions of the first laser 10, the second laser 20 and the third laser 30 and adjusting the spacing between the three in the first direction.
[0082] There are many arrangements of the first laser 10, the second laser 20 and the third laser 30. In an alternative way, the first laser 10, the second laser 20 and the third laser 30 are arranged side by side at intervals in the first direction, so that the laser cutting points of the first laser 10, the second laser 20 and the third laser 30 are arranged side by side in the first direction. Thus, when the pole piece 40 is conveyed along the conveying direction, the first pole piece strip 45 with the first pole ear 421 and the second pole piece strip 46 with the second pole ear 422 are cut out simultaneously.
[0083] In this way, the arrangement of the first laser 10, the second laser 20 and the third laser 30 is neat, which is convenient for positioning and installation among them.
[0084] In another alternative way, the first laser 10, the second laser 20 and the third laser 30 have a spacing in the first direction and also have a spacing in the conveying direction of the pole piece 40.
[0085] In this method, the first laser 10, the second laser 20, and the third laser 30 are spaced apart not only in the first direction but also in the conveying direction of the pole piece 40. Specifically, for example, in the conveying direction of the pole piece 40, the first laser 10, the second laser 20, and the third laser 30 are arranged in sequence from front to back, so that the first pole piece strip 45 with the first pole ear 421 is first cut out on the pole piece 40, and then the second pole piece strip 46 with the second pole ear 422 is cut out. Alternatively, in the conveying direction of the pole piece 40, the third laser 30, the second laser 20, and the first laser 10 are arranged in sequence from front to back, so that the edge area 44 is first cut off on the pole piece 40, and then the second pole piece strip 46 with the second pole ear 422 and the first pole piece strip 45 with the first pole ear 421 are successively cut out. Alternatively, other arrangement orders can also be adopted, depending on specific requirements.
[0086] In this method, the first laser 10, the second laser 20, and the third laser 30 are spaced apart in the conveying direction of the pole piece 40, and can be installed staggeredly. The installation space is sufficient and mutual interference is not likely to occur.
[0087] In this embodiment, after the pole piece 40 is cut by three lasers, it is naturally divided into two pole piece strips with pole ears. The steps are simple and the cutting efficiency is high. Moreover, the setting of the edge area 44 is equivalent to leaving a dimensional allowance for the pole piece 40, avoiding insufficient dimensions of the pole piece strip and making the dimensional accuracy of the cut pole piece strip higher. In addition, the laser cutting has higher stability, is convenient for precise control, is also convenient for increasing the cutting speed, and has higher cutting accuracy and cutting efficiency. Burrs and material dropping do not occur during the laser cutting process, reducing material waste and lowering production costs.
[0088] The above first embodiment details a pole piece cutting assembly. The following second embodiment introduces a pole piece cutting device including the pole piece cutting assembly of the above first embodiment, as follows.
[0089] As shown in Figure 1 , the pole piece cutting device includes a plurality of conveying rollers 80 and the pole piece cutting assembly of the above first embodiment. The plurality of conveying rollers 80 form a conveying roller path to convey the pole piece 40. The first laser 10, the second laser 20, and the third laser 30 of the pole piece cutting assembly face the coating surface of the pole piece 40, and when the pole piece 40 is conveyed, the pole piece 40 is cut out to form the first pole piece strip 45 with the first pole ear 421 and the second pole piece strip 46 with the second pole ear 422.
[0090] The conveying roller 80 is used to convey the electrode sheet 40. The shapes and sizes of the respective conveying rollers 80 can be either exactly the same or different. In a specific implementation manner, the conveying rollers 80 can be arranged adjacent to each other vertically in pairs to draw the electrode sheet 40 through the gap between a pair of conveying rollers 80 to achieve the conveying purpose. The conveying rollers can also be arranged vertically, and the electrode sheet 40 is conveyed through the roller surface of the conveying roller 80, so that the electrode sheet 40 is conveyed in an S shape.
[0091] In an alternative manner, in the conveying direction of the electrode sheet 40, a plurality of conveying rollers 80 located behind the electrode sheet cutting assembly form a first roller path and a second roller path. The first roller path is used to convey the first electrode sheet strip 45, and the second roller path is used to convey the second electrode sheet strip 46.
[0092] In this manner, the cut first electrode sheet strip 45 and second electrode sheet strip 46 are separately conveyed by the first roller path and the second roller path, and the material receiving efficiency is higher.
[0093] The specific structure of the electrode sheet cutting assembly corresponds to the electrode sheet cutting assembly in the foregoing embodiment. For the specific structural setting method, please refer to the relevant introduction of the electrode sheet cutting assembly in any of the embodiments related to the electrode sheet cutting assembly. Similarities will not be elaborated in this embodiment.
[0094] In addition, other mechanisms can be provided for the electrode sheet cutting device to enrich its functions. For example, a unwinding mechanism 91 can be provided to unwind the electrode sheet 40 to be cut, a tape receiving platform 92 can be provided to connect the electrode sheet 40 to the conveying roller path, a deviation correction mechanism 93 can be provided to correct the conveying direction of the electrode sheet 40, a CCD (Charge-Coupled Device) assembly 94 can be provided to position and detect the cutting of the electrode sheet 40, and a winding mechanism 95 can be provided to wind the cut first electrode sheet strip 45 and second electrode sheet strip 46.
[0095] This electrode sheet cutting device can directly cut out two electrode sheet strips with tabs. The steps are simple and the cutting efficiency is higher. Moreover, the laser cutting has higher stability, is convenient for precise control, is also convenient for increasing the cutting speed, and the cutting accuracy and cutting efficiency are higher. During the laser cutting process, there will be no burrs or material dropping, reducing material waste and lowering production costs.
[0096] In summary, in the above-described pole piece cutting assembly and pole piece cutting device, the pole piece cutting assembly is provided with a first laser, a second laser, and a third laser at the same time, and the lasers emitted by the first laser and the second laser can move perpendicular to the conveying direction of the pole piece, so as to perform staggered cutting during the conveying of the pole piece, and staggered first pole ears and second pole ears are cut out in the blank area between the first coating area and the second coating area of the pole piece. The laser emitted by the third laser is set at a fixed point, so as to linearly cut out the edge area during the conveying of the pole piece. After the pole piece is cut by the three lasers, it is naturally divided into two pole piece strips with pole ears, the steps are simple, and the cutting efficiency is high. Moreover, the setting of the edge area is equivalent to leaving a dimensional allowance for the pole piece, avoiding insufficient dimensions of the pole piece strip, and making the dimensional accuracy of the cut pole piece strip higher. In addition, the laser cutting has higher stability, is convenient for precise control, and is also convenient for increasing the cutting speed, and the cutting accuracy and cutting efficiency are higher. Burrs and material dropping will not be generated during the laser cutting process, reducing material waste and lowering production costs.
[0097] Those skilled in the art can understand that although some embodiments herein do not include certain features included in other embodiments, the combination of the features of different embodiments is still within the scope of the present application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.
[0098] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.
Claims
1. A pole piece cutting assembly, characterized in that, The pole piece cutting assembly includes: a first laser, a second laser, and a third laser; The first laser, the second laser, and the third laser are used to face the coated surface of the pole piece to cut the pole piece in transit through the emitted laser; The lasers emitted by the first laser and the second laser can move in a first direction perpendicular to the conveying direction of the pole piece; when the pole piece is conveyed, the lasers emitted by the first laser and the second laser cut out staggered first pole ears and second pole ears in the blank area between the first coating area and the second coating area of the pole piece; The laser emitted by the third laser is in a fixed state in the first direction to linearly cut out the edge area of the pole piece when the pole piece is conveyed, and the edge area and the blank area are located on opposite sides of the second coating area.
2. The pole piece cutting assembly according to claim 1, characterized in that, The edge area includes an edge coating area and an edge blank area, and the edge coating area is adjacent to the second coating area.
3. The pole piece cutting assembly according to claim 1, wherein The first laser and the second laser can move in the first direction so that the lasers emitted by the first laser and the second laser move in the first direction.
4. The pole piece cutting assembly according to claim 3, wherein, The pole piece cutting assembly further includes a bracket; A sliding part is provided on the first laser, and a slide rail is provided on the bracket, and the track direction of the slide rail is the first direction; the sliding part is slidably connected to the slide rail so that the sliding part can slide in the first direction.
5. The pole piece cutting assembly according to claim 4, characterized in that, The sliding part is a convex block, the slide rail is a chute, and the convex block is embedded in the chute and can slide in the chute in the first direction.
6. The pole piece cutting assembly according to claim 4, characterized in that, The sliding part is a through hole, the slide rail is a sliding shaft, and the axial direction of the sliding shaft is the first direction; the aperture of the through hole is larger than the shaft diameter of the sliding shaft, and the through hole is sleeved on the sliding shaft and can slide in the first direction.
7. The pole piece cutting assembly according to claim 1, characterized in that The first laser includes a galvanometer, and the laser emitted by the first laser is directed at the pole piece through the galvanometer; the galvanometer rotates to make the laser emitted by the first laser move in the first direction; And / or, the second laser includes a galvanometer, and the laser emitted by the second laser is directed at the pole piece through the galvanometer; the galvanometer rotates to make the laser emitted by the second laser move in the first direction.
8. The pole piece cutting assembly according to claim 1, characterized in that, The first laser, the second laser, and the third laser have a spacing in the first direction and also have a spacing in the conveying direction of the pole piece.
9. A pole piece cutting device, characterized in that, The pole piece cutting device includes: a plurality of conveying rollers and the pole piece cutting assembly according to any one of claims 1-8; The plurality of conveying rollers form a conveying roller path to convey the pole piece; the first laser, the second laser, and the third laser of the pole piece cutting assembly face the coated surface of the pole piece, and when the pole piece is conveyed, the pole piece is cut into a first pole piece strip with first pole ears and a second pole piece strip with second pole ears.
10. The pole piece cutting device according to claim 9, characterized in that, In the conveying direction of the pole piece, a plurality of the conveying rollers located behind the pole piece cutting assembly form a first roller path and a second roller path; the first roller path is used for conveying the first pole piece belt, and the second roller path is used for conveying the second pole piece belt.