Laser scribing device and laser scribing equipment

Abstract

The invention provides a laser scribing device and laser scribing equipment, and relates to the technical field of laser equipment. The laser scribing device comprises a homogenizing part and a separating part, and the homogenizing part is used for receiving an initial light beam generated by a light emitting part and homogenizing the initial light beam to form a light beam with uniform energy; the separator is arranged on a transmission path of the light beam with uniform energy and is positioned on one side of the homogenizing part; the separator is used for separating the homogenized light beam into a plurality of sub light beams. According to the embodiment of the invention, a plurality of sub-beams with consistent energy can be formed, so that the depth consistency of a plurality of scribed lines is improved, and the performance of a product prepared by the laser scribing device is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of laser equipment technology, and in particular, to a laser scribing device and a laser scribing device. Background Art

[0002] With the continuous development of the electronics industry, portable consumer electronic products have become more and more functional and more and more complete and powerful, especially with the emergence of smart phones, tablet computers, and wearable devices. They are powerful and have many components, and have a large demand for power and frequent charging and discharging. Therefore, the requirements for the energy density, cycle life, and safety performance of randomly matched batteries are getting higher and higher.

[0003] In the related art, in high energy density batteries, the thickness of the electrode sheet is generally designed to be thicker, the compacted density of the material is large, and there is greater resistance to the infiltration of the electrolyte. It is usually necessary to use a laser to scribe the surface of the negative electrode sheet to form multiple scribe lines with equal spacing and a certain depth, so that the transmission efficiency of lithium ions can be improved and the battery capacity storage rate can be increased.

[0004] However, the depth consistency of the multiple scribe lines currently formed is poor, which reduces the performance of the product (eg, pole piece) produced by the laser scribe device. Summary of the invention

[0005] In view of the above problems, the embodiments of the present application provide a laser scribing device and a laser scribing equipment, which can improve the depth consistency of multiple scribing lines, thereby improving the performance of the product prepared by the laser scribing device.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] A first aspect of an embodiment of the present application provides a laser scribing device, comprising:

[0008] A homogenizing element, the homogenizing element is used to receive the initial light beam generated by the light emitting element and homogenize the initial light beam to form a light beam with uniform energy;

[0009] A separator is arranged on the transmission path of the light beam with uniform energy and located on one side of the homogenizer; the separator is used to separate the light beam with uniform energy into multiple sub-beams.

[0010] In a possible implementation, the laser scribing device further includes a light emitting element, and the light emitting element is used to generate an initial light beam;

[0011] The light emitting element is arranged on a side of the homogenizing element away from the partition element and is located on a transmission path of the initial light beam.

[0012] In a possible implementation manner, the light emitting component and the homogenizing component are an integrated component; or, the light emitting component and the homogenizing component are separate components.

[0013] In a possible implementation, the separator includes a plurality of separators, and the plurality of separators are used to separate the light beam with uniform energy into a plurality of sub-light beams.

[0014] In a possible implementation manner, the light beam with uniform energy interferes with each other when passing through the multiple partitions, and is divided into multiple sub-light beams by the multiple partitions.

[0015] In a possible implementation, the partition includes a protruding portion, and the protruding portion protrudes in a direction close to and / or away from the light-emitting element;

[0016] A plurality of the partitions are arranged on the protruding portion at intervals.

[0017] In a possible implementation, the partition also includes a base, which is connected to the protrusion; the base and the protrusion enclose a cavity, and the partition is located outside the cavity; wherein the cavity is used for transmission of an energy-uniform light beam formed by the homogenizer.

[0018] In a possible implementation, the plurality of partitions form a plurality of partition groups, and each of the partitions includes a plurality of partitions;

[0019] The plurality of partition groups are arranged at intervals in a direction approaching or away from a center of the protruding portion.

[0020] In a possible implementation manner, the number of the partitions in the plurality of partition groups gradually increases along a direction away from the center of the protruding portion.

[0021] In a possible implementation manner, at least part of the partitions include microlens units or slits.

[0022] In a possible implementation, it further includes a beam expansion collimator, wherein the beam expansion collimator is disposed between the light emitting element and the homogenizing element;

[0023] Among them, the beam expansion and collimation component includes a beam expansion part and a collimation part arranged in sequence, the beam expansion part is located between the light-emitting component and the collimation part, the beam expansion part is used to expand the initial light beam, and the collimation part is used to collimate the initial light beam after expansion.

[0024] In a possible implementation, the beam expander and collimator comprises a beam expander and a collimator connected to each other, and the beam expander is located between the collimator and the light emitting element;

[0025] The surface of the beam expander facing the light emitting member is recessed in a direction away from the light emitting member to form a beam expander; the surface of the collimator facing away from the beam expander is convex in a direction away from the beam expander to form the collimator.

[0026] In a possible implementation manner, a focusing element is further included, wherein the focusing element is disposed in a transmission path of the plurality of sub-beams and focuses the plurality of sub-beams;

[0027] The separator is located between the homogenizing element and the focusing element. A second aspect of the embodiment of the present application provides a laser scribing device, which includes an unwinding mechanism, a rewinding mechanism, and the laser scribing device described in the first aspect; the unwinding mechanism and the rewinding mechanism are arranged at intervals, and the unwinding mechanism is used to unwind the pole roll;

[0028] The laser scribing device is arranged on the conveying path of the pole coil and scribing the pole coil;

[0029] The winding mechanism is used for winding the pole coil.

[0030] In a possible implementation, the laser scribing device further includes: a conveying mechanism, which is disposed between the unwinding mechanism and the winding mechanism and is used to convey the pole roll.

[0031] In the laser scribing device and laser scribing equipment provided in the embodiments of the present application, the initial light beam generated by the light-emitting component is homogenized by a homogenizer to form a light beam with uniform energy, so that the energy of the light beam located in the middle and at the edge can be made more uniform; and then the light beam is separated into multiple sub-beams by a separator to form multiple sub-beams with balanced energy, thereby avoiding the energy of some sub-beams being too strong or too weak, thereby ensuring the depth consistency of multiple engraved lines, and thus improving the performance of the product prepared by the laser scribing device.

[0032] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the laser scribing device and laser scribing equipment provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 The structure of the laser scribing device provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0035] Figure 2 The structure of the laser scribing device provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0036] Figure 3 A three-dimensional diagram of a separator provided in an embodiment of the present application;

[0037] Figure 4 A top view of a separator provided in an embodiment of the present application;

[0038] Figure 5 A schematic diagram of the structure of a beam expansion collimator provided in an embodiment of the present application;

[0039] Figure 6 A diagram showing the use status of the laser scribing device provided in an embodiment of the present application;

[0040] Figure 7 A schematic diagram of a laser scribing device provided in an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 10: Laser scribing device;

[0043] 100: luminous parts;

[0044] 200: separator; 210: separator; 220: protrusion; 230: base;

[0045] 300: focusing piece;

[0046] 400: beam expansion collimator; 410: beam expansion unit; 420: collimator; 430: beam expansion unit; 440: collimator; 450: beam expansion convex lens;

[0047] 500: homogenizing parts;

[0048] 600: unwinding mechanism;

[0049] 700: conveying mechanism;

[0050] 800: rewinding mechanism;

[0051] 900: Extreme volume. DETAILED DESCRIPTION

[0052] As described in the background technology, the depth consistency of multiple lines formed by the laser scribing system is relatively poor. The inventors have found that the reason for this problem is that the laser scribing system of the related technology usually includes a laser emitter and a galvanometer system, and the laser emitter is used to emit laser. Among them, the galvanometer system usually includes multiple galvanometers and at least one drive motor; the galvanometer is driven to rotate by at least one drive motor, thereby changing the reflection direction of the light beam. However, within the width range of the galvanometer, the light spot received by the format far away from the center of the light beam is large, the energy is low, and the depth of the engraved line is shallow, which leads to poor consistency of the depth of the lines on the pole roll.

[0053] In response to the above technical problems, the embodiments of the present application provide a laser scribing device and a laser scribing equipment, which homogenizes the initial light beam generated by the light-emitting component through a homogenizer to form a light beam with uniform energy, so that the energy of the light beam in the middle and at the edge can be more uniform; and then use a separator to separate the light beam into multiple sub-beams to form multiple sub-beams with balanced energy, thereby avoiding the energy of some sub-beams being too strong or too weak, thereby ensuring the depth consistency of multiple engraved lines, and thereby improving the performance of the products prepared by the laser scribing device.

[0054] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0055] The embodiment of the present application provides a laser scribing device 10, which is used to form scribing lines on a component to be processed, wherein the component to be processed may be a battery electrode, a printed circuit board (PCB), or other flexible components.

[0056] Please refer to the attached Figure 1 and attached Figure 3 The laser scribing device 10 includes a homogenizer 500, and the homogenizer 500 is used to receive the initial light beam generated by the light-emitting element 100. It should be noted that the light-emitting element 100 is used to generate an initial light beam with high energy density through the excitation of the laser medium. Among them, the light-emitting element 100 can be various types of lasers. For example, the light-emitting element 100 can include a solid laser, a semiconductor laser or a fiber laser. The initial light beam formed by the light-emitting element 100 is usually diffused in an area similar to a triangle. The energy of the initial light beam located in the central area is usually greater than the energy of the initial light beam located in the edge area. Therefore, the initial light beam generated by the light-emitting element 100 is a beam with uneven energy.

[0057] The homogenizer 500 is also used to homogenize the initial light beam to form a light beam with uniform energy. That is, the homogenizer 500 can integrate and homogenize the initial light beam, homogenize the energy of the initial light beam in the central area and the energy of the initial light beam in the edge area, so that the light beam homogenized by the homogenizer 500 is a light beam with uniform energy.

[0058] The homogenizer 500 may include a confocal fly lens or a Fresnel refraction zone. For example, the homogenizer 500 is a confocal fly lens composed of a plurality of small lenses (micro lenses), which are usually arranged in a regular matrix form. By adjusting the arrangement and focal length of the micro lenses, the initial light beam can be homogenized.

[0059] In the embodiment of the present application, in order to specifically illustrate the uniformity of the light beam, it is assumed that the energy-uniform light beam formed by the homogenizer 500 encloses an approximately circular area in space. The radius of this circle is represented by the capital letter R, which represents the main range covered by the energy-uniform light beam. In the circular area enclosed by the radius R, any two points are selected. As long as the two points are located on the radius R, the difference between the energy of the light beams at their positions should be less than 5%, which proves that the energy distribution of the light beams formed after being homogenized by the homogenizer 500 is basically consistent.

[0060] The laser scribing device 10 also includes a separator 200, which is arranged on the transmission path of the energy-uniform light beam and is located on one side of the homogenizer 500. The separator 200 is used to separate the energy-uniform light beam into multiple sub-beams. In this embodiment, the homogenizer 500 and the separator 200 cooperate with each other. The homogenizer 500 is used to receive the initial light beam generated by the light-emitting element and homogenize the initial light beam to form an energy-uniform light beam, so that the energy of the central area and the edge area of ​​the light beam can be made more uniform; and then the separator 200 is used to separate the light beam into multiple sub-beams to form multiple sub-beams with balanced energy, so as to avoid the energy of some sub-beams being too strong or too weak, thereby ensuring the depth consistency of multiple engraved lines, thereby improving the performance of the product prepared by the laser scribing device.

[0061] It should be noted that the light emitting element 100 and the homogenizing element 500 can be relatively independent components or can be an integrated component. In one example, the light emitting element 100 and the homogenizing element 500 are separate components, so that the most suitable light emitting element 100 and the homogenizing element 500 can be selected according to different application scenarios to achieve the best homogenizing effect.

[0062] In another embodiment, the light emitting member 100 and the homogenizing member 500 are an integral part. For example, the laser scribing device 10 may further include a housing (not shown in the figure), wherein the housing includes an inner cavity and a light outlet interconnected with the inner cavity. The light emitting member 100 and the homogenizing member 500 are spaced apart in the inner cavity, and the homogenizing member 500 is located between the light outlet and the light emitting member 100. The initial light beam generated by the light emitting member 100 is homogenized by the homogenizing member 500 and transmitted to the outside of the housing through the light outlet. This embodiment reduces the assembly steps and required space between components by integrating the light emitting member 100 and the homogenizing member 500 into one, thereby making the structure of the entire laser scribing device more compact and more integrated. In addition, the homogenizer 500 is directly integrated after the light-emitting element 100, which ensures that the initial light beam is effectively homogenized immediately after it is generated. This instant homogenization reduces the adverse effects such as scattering and diffraction that may occur in the transmission process of the initial light beam, thereby improving the uniformity and consistency of the energy-uniform light beam formed after being homogenized by the homogenizer 500, and ensuring the stability and accuracy of the marking quality.

[0063] It should be understood that the separator 200 can be composed of multiple independent small parts or an integral structure. Exemplarily, the separator 200 includes multiple separators 210, and the multiple separators 210 are used to separate the energy-uniform light beam into multiple sub-beams. In this way, while ensuring that the separator 200 can separate the energy-uniform light beam into multiple sub-beams, its structure is more compact and stable, which helps to ensure that the energy distribution of each sub-beam is consistent.

[0064] The plurality of separators 210 may separate a light beam with uniform energy into a plurality of sub-beams through the principles of reflection and transmission, or may generate an optical effect through interference effect to separate a light beam with uniform energy into a plurality of sub-beams.

[0065] Exemplarily, the beams of uniform energy interfere with each other when passing through the plurality of partitions 210, and are separated into a plurality of sub-beams by the plurality of partitions 210. The interference effect causes the beams of uniform energy to form a complex interaction between the plurality of partitions 210, further improving the uniformity of the spatial distribution of each sub-beam, thereby ensuring that each sub-beam has a similar energy density and light intensity distribution.

[0066] At least part of the partitions 210 include microlens units or slits. It can be understood that: in one example, among all the partitions 210, part of the partitions 210 are microlens units, and the remaining partitions 210 are slits. In another example, all the partitions 210 are microlens units, and the plurality of partitions 210 constitute a microlens array. Alternatively, all the partitions 210 are slits, and the partition 200 constitutes a slit plate.

[0067] When the separator 210 is a microlens unit, each microlens unit can separate the uniform energy light beam into a sub-beam by using its refraction function. The design of the microlens unit can reduce the interference between different sub-beams and the scattering of the sub-beams during the separation and focusing process, thereby ensuring the independence and stability of each sub-beam; on the other hand, the design of the microlens unit can reduce the distortion of the uniform energy light beam during the separation and focusing process, thereby ensuring the quality of the uniform energy light beam.

[0068] In addition, the present embodiment can also reasonably set the material of the microlens unit. By selecting the material, the refractive index of the microlens can be reasonably set, so that the laser scribing device can meet different usage scenarios, thereby improving the practicality of the laser scribing device.

[0069] It should be understood that when the partition 210 is a microlens unit, the partition 210 may protrude in a direction close to and / or away from the light emitting element 100 , and may be freely arranged according to actual needs.

[0070] In one possible implementation, please refer to the attached Figure 3 The separator 200 includes a protruding portion 220, which protrudes in a direction close to and / or away from the light-emitting element 100; and a plurality of separators 210 are arranged at intervals on the protruding portion 220. In this embodiment, the protruding portion 220 protrudes in a direction away from the light-emitting element 100, so that the protruding portion 220 forms a structure similar to a convex lens, and thus the protruding portion 220 has a focusing function, which is conducive to the preliminary focusing of the light beam with uniform energy, ensuring that the sub-beams after passing through the plurality of separators have a better focusing effect, and improving the energy balance of the sub-beams.

[0071] In this embodiment, the protrusion 220 and the partition 210 can be an integral part or a separate part. When the protrusion 220 and the partition 210 are an integral part, they can be prepared by injection molding and stamping processes. On the one hand, the structural stability of the partition 200 can be enhanced, the vibration and displacement that may occur during the laser processing process can be reduced, and the stability and processing accuracy of the laser scribing device can be improved; on the other hand, the injection molding and stamping processes can achieve high-precision manufacturing, ensuring that the size and shape of the protrusion 220 and the partition 210 are precisely consistent, thereby improving the separation accuracy of the energy-uniform beam.

[0072] In a possible implementation, the partition 200 further includes a base 230, and the base 230 is connected to the protrusion 220. For example, the base 230 is fixedly connected to the surface of the protrusion 220 facing the light-emitting element 100.

[0073] The base 230 and the protrusion 220 enclose a cavity, and the partition 210 is located outside the cavity, ensuring that the energy-uniform light beam formed by the homogenizer 500 can be transmitted to the partition 210 through the cavity, thereby ensuring that the light beam can be divided into sub-beams by the partition 210. In this embodiment, the cavity enclosed by the base 230 and the protrusion 220 facilitates the transmission of the energy-uniform light beam formed by the homogenizer 500, ensuring that the energy-uniform light beam will not be subjected to unnecessary interference or loss during the transmission process.

[0074] This embodiment is also connected to the protrusion 220 via the base 230, and the base 230 can be used to provide mechanical support to the protrusion 220, thereby improving the structural stability of the separator 200 and making the separator 200 less likely to deform or move during installation and use, thereby ensuring the durability and reliability of the separation effect.

[0075] In addition, the base 230 can also be used as a connecting component, and the base 230 is fixedly connected to other components of the laser scribing device. On the one hand, it is easier to position and fix during the installation process, which simplifies the installation steps and improves the assembly efficiency. On the other hand, it can avoid the protrusion 220 from being directly connected to other components, which can reduce the damage to the partition 210, improve the separation accuracy of the partition 200, and extend the service life of the partition 200.

[0076] It should be noted that in this example, the base 230 and the protrusion 220 can be integrated and can be prepared by stamping or injection molding, which can enhance the structural stability of the partition 200, reduce the vibration and displacement that may occur during laser processing, and improve the stability and processing accuracy of the laser scribing device.

[0077] In other embodiments, the number of the protrusions 220 may also be two, wherein one protrusion 220 is disposed on a side of the base 230 close to the light-emitting element 100, and the other protrusion 220 is disposed on a side of the base 230 away from the light-emitting element 100. The protrusion directions of the two protrusions 220 may be the same or different. For example, the protrusion 220 close to the light-emitting element 100 may protrude in a direction close to the light-emitting element 100, and the protrusion 220 away from the light-emitting element 100 may protrude in a direction away from the light-emitting element 100.

[0078] In this embodiment, a plurality of partitions 210 may be arranged at intervals in the protrusion 220. In order to facilitate the detailed layout of the distribution of the plurality of partitions 210, the plurality of partitions 210 form a plurality of partition groups, each of which includes a plurality of partitions 210. That is, in this embodiment, the plurality of partitions 210 are divided into a plurality of partition groups. For example, the plurality of partitions 210 may be divided into three, four, five or even more partition groups. Figure 4Taking the orientation shown in the figure as an example, the area between the dotted boxes is a separation group. It should be understood that for the sake of clarity of the attached drawings, Figure 4 Only one partition group is shown.

[0079] The plurality of spacer groups are arranged at intervals in a direction close to or away from the center of the protrusion 220. The embodiment can achieve multi-point focusing through the design of the plurality of spacer groups, thereby improving the processing efficiency and the consistency of the scribing depth.

[0080] The multiple partitions 210 in each partition group can be arranged along a circular trajectory. For example, the multiple partitions 210 in each partition group are arranged along a circular trajectory, which can achieve uniform beam distribution, making the energy and direction of each sub-beam more consistent, thereby improving processing quality and consistency.

[0081] In a possible implementation, the number of partitions 210 in the plurality of partition groups gradually increases in a direction away from the center of the protruding portion 220. The number of partitions 210 in the plurality of partition groups may increase in equal proportion or in unequal proportion, which is not specifically limited in this embodiment.

[0082] In this embodiment, the number of separators 210 is gradually increased, so that the light beam with uniform energy can be more evenly distributed on each sub-beam, avoiding energy concentration in the central area and improving the uniformity of energy distribution; in addition, the design of gradually increasing separators 210 can reduce interference between different sub-beams and ensure the independence and stability of each sub-beam.

[0083] In one possible implementation, please refer to the attached Figure 2 and attached Figure 5 The laser scribing device further includes a beam expander and collimator 400 , which is disposed between the light emitting element 100 and the homogenizer 500 .

[0084] The beam expander and collimator 400 includes a beam expander 410 and a collimator 420 which are arranged in sequence. The beam expander 410 is located between the light emitting element 100 and the collimator 420. The beam expander 410 is used to expand the initial light beam, and the collimator 420 is used to collimate the expanded initial light beam.

[0085] In this embodiment, the initial light beam generated by the light-emitting element 100 is expanded by the expansion section 410, that is, the initial light beam can be transmitted at a larger refraction angle by changing the refractive index; and the expansion section 410 is matched with the collimating section 420, and the collimating section 420 can be used to collimate the expanded initial light beam to form an initial light beam with a large width; in this way, the initial light beam can be evenly distributed on the homogenizing element 500, thereby ensuring that the energy of each sub-beam formed is more balanced.

[0086] As a possible implementation of the beam expander and collimator, the beam expander and collimator 400 includes a beam expander 430 and a collimator 440 that are connected to each other. The beam expander 430 is located between the collimator 440 and the light emitting element 100 .

[0087] The surface of the beam expander 430 facing the light emitting element 100 is recessed along the direction of the light emitting element 100 to form a beam expander 410 ; the surface of the collimator 440 away from the beam expander 430 is convex along the direction of the beam expander 430 to form a collimator 420 .

[0088] In this embodiment, the opposing surfaces of the beam expander 430 and the collimator 440 are both planes, so that the two can fit together to facilitate the installation of the beam expander 430 and the collimator 440 .

[0089] The structure of the beam expander 410 is similar to a concave lens, which can change the emission angle of the initial light beam to achieve the beam expansion effect of the beam expander 410. The structure of the collimator 440 is similar to a convex lens, which can collimate the divergent initial light beam into a parallel initial light beam through the refraction of the convex lens, so that the initial light beam can be evenly distributed on the homogenizer 500, thereby ensuring that the energy of each sub-beam formed is more balanced.

[0090] It should be noted that the beam expander and collimator 400 in this embodiment is not limited to the above structure, and may have other structures. Figure 2 The beam expander and collimator 400 disclosed in this embodiment includes a beam expander 430 and a collimator 440, and further includes a beam expander convex lens 450. In this way, the initial light beam can be expanded twice, so that the initial light beam is transmitted at a larger refraction angle.

[0091] The laser scribing device provided in the embodiment of the present application also includes a focusing element 300, which is arranged in the transmission path of the multiple sub-beams and is located on the side of the partition 200 away from the homogenizing element 500; in other words, the partition 200 is located between the homogenizing element 500 and the focusing element 300.

[0092] The focusing member 300 is used to focus multiple sub-beams to reduce the spot size, so as to ensure that the formed scribe line has the characteristics of greater depth and smaller width. It should be noted that the distance between the partition 200 and the focusing member 300 can be designed according to actual needs.

[0093] Please refer to the attached Figure 7 The embodiment of the present application also provides a laser scribing device, which can scribing the battery pole roll 900. It should be noted that the pole roll in this example can be the raw material for forming the battery pole sheet, which is stored and transported in a winding manner, so it is called a pole roll.

[0094] The laser scribing device includes an unwinding mechanism 600, a conveying mechanism 700, a rewinding mechanism 800, and the laser scribing device 10 described in the above embodiment. The unwinding mechanism 600 and the rewinding mechanism 800 are arranged at intervals, and the unwinding mechanism 600 is used to unwind the electrode roll; for example, the unwinding mechanism 600 is used to unwind the electrode roll. The rewinding mechanism 800 is used to rewind the electrode roll.

[0095] The conveying mechanism 700 is arranged between the unwinding mechanism 600 and the rewinding mechanism 800, and is used for conveying the pole coil; the laser scribing device is arranged on the conveying path of the pole coil, and scribing the pole coil.

[0096] In this embodiment, the conveying mechanism 700 is located downstream of the unwinding mechanism 600, and is used to convey the pole roll to the laser scribing device for scribing. The reeling mechanism is used to reel in the pole roll that has been scribed. It should be noted that the unwinding mechanism 600, the conveying mechanism 700 and the reeling mechanism 800 involved in this example are all prior art, and the specific structure can be referred to the description in the prior art, and this embodiment will not be described in detail here.

[0097] It should be noted that the number of laser scribing devices in this embodiment can be one or two. For example, in this embodiment, the number of laser scribing devices is two, and the two laser scribing devices are arranged between the unwinding mechanism 600 and the rewinding mechanism 800 at intervals. The laser scribing device close to the unwinding mechanism 600 performs the first scribing operation on the pole roll, and the laser scribing device far from the unwinding mechanism 600 performs the second scribing operation on the pole roll. By forming a line on the pole roll through two scribing operations, the depth of the line and the spacing between adjacent lines can be reasonably set according to the actual needs of the product, thereby improving the performance of the formed product.

[0098] In order to facilitate the detailed description of the laser scribing system, the two laser scribing devices may be recorded as the first laser scribing device and the second laser scribing device, and the first laser scribing device is located between the unwinding mechanism 600 and the second laser scribing device. Accordingly, the conveying mechanism 700 can be divided into a first conveying section, a second conveying section and a third conveying section, wherein the first conveying section is used to convey the pole roll to the first laser scribing device, the second conveying section is used to convey the pole roll that has completed the first scribing to the second laser scribing device, and the third conveying section is used to convey the pole roll that has completed the first and second scribing to the rewinding mechanism 800.

[0099] The use of the laser scribing system includes the following steps:

[0100] Step S100: The unwinding mechanism unwinds the pole coil, and the first conveying section conveys the pole coil to below the first laser scribing device and ensures the flatness of the pole coil.

[0101] Step S200: The first laser scribing device stably outputs a plurality of sub-beams to the moving pole roll, thereby forming a plurality of scribing lines on the A surface of the pole roll.

[0102] In this step, the light-emitting element of the first laser scribing device may be started first, wherein the light-emitting element adopts a continuous laser with a power of 500-3000W and a core diameter of less than 20 μm.

[0103] The beam expander and collimator receives the initial light beam generated by the light emitting element and performs beam expansion and collimation on the initial light beam. The focal length of the beam expander and collimator is 30-100 mm, and the effective distance after collimation is greater than 500 mm.

[0104] The homogenizer receives the initial beam after beam expansion and collimation, integrates and homogenizes it, and outputs a beam with uniform energy. The energy non-uniformity of the homogenizer is less than 10%.

[0105] The partition receives the uniform energy beam formed by the homogenizer and divides the uniform energy beam into multiple sub-beams. The partition is divided into more than or equal to 100 small matrices, each small matrix has a center spacing of 0.5-3mm (i.e., the spacing between two adjacent scribed lines is 0.5mm-3mm), an energy loss of 1%-5%, and the energy loss of other units is less than or equal to 1%. The arrangement form of the microlens array is not limited, and can be rectangular or circular.

[0106] The focusing unit receives the split sub-beams and focuses them separately to reduce the spot diameter of each sub-beam. Each focused spot eventually carves a line on the pole roll. The focal length of the focusing unit is 30-200mm, the spot diameter after focusing is less than 60μm, and the heat affected area is less than 150μm.

[0107] In actual use, the marking operation can be performed on a pole coil with a length of 300 mm to 1000 mm. Specifically, the pole coil movement speed can be 100 mm / s to 1000 mm / s, and the speed of the pole coil movement depends on the energy of the light-emitting element.

[0108] Step S300: After the first scribing is completed, the second conveying section conveys the pole roll to the bottom of the second laser scribing device and ensures the flatness of the pole roll;

[0109] The second laser scribing device stably outputs multiple sub-beams to the moving pole roll, thereby forming multiple scribing lines on the B surface of the pole roll.

[0110] Step S400: The third conveying section conveys the pole coil that has completed the marking to the winding mechanism, and the winding mechanism performs a winding operation on the pole coil that has completed the marking.

[0111] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0112] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A laser scribing device, characterized in that: include: A homogenizing element (500), the homogenizing element (500) being used to receive an initial light beam generated by the light-emitting element and homogenize the initial light beam to form a light beam with uniform energy; A separator (200), the separator (200) is arranged on the transmission path of the light beam with uniform energy and is located on one side of the homogenizing element (500); the separator (200) is used to separate the light beam with uniform energy into a plurality of sub-beams.

2. The laser scribing device according to claim 1, characterized in that: The laser scribing device further comprises a light emitting element (100), wherein the light emitting element (100) is used to generate an initial light beam; The light-emitting element (100) is arranged on a side of the homogenizing element (500) that is away from the partition element (200).

3. The laser scribing device according to claim 2, characterized in that: The light-emitting component (100) and the homogenizing component (500) are an integral component; or, the light-emitting component (100) and the homogenizing component (500) are separate components.

4. The laser scribing device according to any one of claims 1 to 3, characterized in that: The separator (200) comprises a plurality of separators (210), and the plurality of separators (210) are used to separate the light beam with uniform energy into the plurality of sub-light beams.

5. The laser scribing device according to claim 4, characterized in that: The light beams with uniform energy interfere with each other when passing through the plurality of partitions (210), and are divided into the plurality of sub-light beams by the plurality of partitions (210).

6. The laser scribing device according to claim 5, characterized in that: The separator (200) comprises a protruding portion (220), and the protruding portion (220) protrudes in a direction approaching or away from the homogenizing member (500); A plurality of the partitions (210) are arranged at intervals on the protruding portion (220).

7. The laser scribing device according to claim 6, characterized in that: The separator (200) further comprises a base (230), wherein the base (230) is connected to the protruding portion (220); The base (230) and the protruding portion (220) enclose a cavity, and the partition (210) is located outside the cavity; wherein the cavity is used for transmitting a light beam with uniform energy formed by the homogenizing element (500).

8. The laser scribing device according to claim 6 or 7, characterized in that: The plurality of partitions (210) form a plurality of partition groups, each of the partition groups comprising a plurality of partitions (210); The plurality of partition groups are arranged at intervals in a direction approaching or moving away from the center of the protruding portion (220).

9. The laser scribing device according to claim 8, characterized in that: Along the direction away from the center of the protruding portion (220), the number of the partitions (210) in the plurality of partition groups gradually increases.

10. The laser scribing device according to any one of claims 5 to 7, characterized in that: At least part of the partition (210) includes microlens units or slits.

11. The laser scribing device according to claim 2 or 3, characterized in that: The laser scribing device further comprises a beam expansion and collimation component (400), wherein the beam expansion and collimation component (400) is arranged between the light emitting component (100) and the homogenizing component (500); The beam expanding and collimating component (400) comprises a beam expanding portion (410) and a collimating portion (420) arranged in sequence, the beam expanding portion (410) is located between the light emitting component (100) and the collimating portion (420), the beam expanding portion (410) is used to expand the initial light beam, and the collimating portion (420) is used to collimate the initial light beam after expansion.

12. The laser scribing device according to claim 11, characterized in that: The beam expanding and collimating member (400) comprises a beam expanding member (430) and a collimating member (440) connected to each other, and the beam expanding member (430) is located between the collimating member (440) and the light emitting member (100); The surface of the beam expander (430) facing the light-emitting element (100) is recessed in a direction away from the light-emitting element (100) to form a beam expander (410); and the surface of the collimator (440) away from the beam expander (430) is protruded in a direction away from the beam expander (430) to form the collimator (420).

13. The laser scribing device according to claim 12, characterized in that: The laser scribing device further comprises a focusing element (300), wherein the focusing element (300) is arranged on a transmission path of the plurality of sub-beams and focuses the plurality of sub-beams; The partition (200) is located between the homogenizing element (500) and the focusing element (300).

14. A laser scribing device, characterized in that: The invention comprises an unwinding mechanism (600), a rewinding mechanism (800) and the laser scribing device according to any one of claims 1 to 13; the unwinding mechanism (600) and the rewinding mechanism (800) are arranged at intervals, and the unwinding mechanism (600) is used to unwind the pole roll (900); The laser scribing device is arranged on a conveying path of the pole roll (900) and scribes the pole roll (900); The winding mechanism (800) is used to wind up the pole coil (900).

15. The laser scribing device according to claim 14, characterized in that: The laser scribing device further comprises: a conveying mechanism (700), wherein the conveying mechanism (700) is arranged between the unwinding mechanism (600) and the winding mechanism (800) and is used for conveying the pole roll (900).

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