Laser scribing assembly, laser scribing device, laser scribing equipment and scribing method

Abstract

The invention provides a laser scribing assembly, a laser scribing device, laser scribing equipment and a scribing method, and relates to the technical field of laser equipment. The laser scribing assembly comprises a shell, a plurality of light-emitting pieces and a plurality of light path assemblies. The plurality of light-emitting parts are arranged in the shell at intervals and are used for generating laser beams; the light path assemblies are arranged on the shell and correspond to the light emitting pieces one to one. Each light path assembly is located on a transmission path of a laser beam generated by the corresponding light-emitting part. Each light path assembly comprises a collimation piece and a focusing piece; and each laser beam emitted by the light emitting part passes through the corresponding collimating part and is transmitted out of the shell through the corresponding focusing part. According to the laser scribing device, the depth consistency of the multiple scribed lines can be improved, and then the performance of a product prepared by the laser scribing device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of laser equipment, and in particular to a laser scribing assembly, a laser scribing device, a laser scribing equipment and a scribing method. 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. Usually, a laser scribing assembly is required to scribing the surface of the negative electrode sheet to form multiple scribed 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 energy of the multiple laser beams formed by the laser scribing assembly is not uniform, which results in poor depth consistency of the multiple scribing lines formed. Summary of the invention

[0005] In view of the above problems, the embodiments of the present application provide a laser scribing assembly, a laser scribing device, a laser scribing equipment and a scribing method, which can ensure consistent energy distribution of multiple laser beams, thereby ensuring the depth consistency of multiple engraved lines.

[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 assembly comprising:

[0008] case;

[0009] A plurality of light-emitting elements, which are arranged in the housing at intervals and are used to generate laser beams;

[0010] A plurality of optical path components, wherein the plurality of optical path components are arranged in the housing and correspond to the plurality of light emitting elements one by one; each of the optical path components is located on the transmission path of the laser beam generated by the corresponding light emitting element; wherein each of the optical path components includes a collimating element and a focusing element;

[0011] Each of the laser beams emitted by the light-emitting element passes through the corresponding collimating element and is transmitted to the outside of the housing via the corresponding focusing element.

[0012] In a possible implementation manner, at least one of the plurality of light-emitting elements and the plurality of collimating elements is arranged in the housing in a stepped manner, and the corresponding light-emitting elements and collimating elements are located on the same plane.

[0013] In a possible implementation, the plurality of light-emitting elements and the plurality of collimating elements are arranged in the housing in a stepped manner;

[0014] The corresponding light emitting components and the collimating components form an optical component group, and the distances between the light emitting components and the collimating components in all the optical component groups are equal.

[0015] In a possible implementation, the plurality of collimating components are separate components, and / or the plurality of focusing components are separate components independent of each other.

[0016] In a possible implementation, the laser scribing assembly further includes a first support member and a second support member, the first support member and the second support member are spaced apart from each other in the housing, and the first support member is located on a side of the second support member facing the light emitting member; the light transmittance of the second support member is greater than its refractive index;

[0017] The plurality of light emitting members are arranged on the first supporting member in a stepped manner, and the plurality of collimating members are arranged on the second supporting member in a stepped manner.

[0018] In a possible implementation, the first support member is provided with a plurality of first step surfaces, and each of the first step surfaces is provided with a light-emitting member;

[0019] The second support member is provided with a plurality of second step surfaces, and each of the second step surfaces is provided with a collimating member;

[0020] The plurality of first step surfaces and the plurality of second step surfaces are correspondingly flush.

[0021] In a possible implementation manner, an arrangement direction of the plurality of first step surfaces and an arrangement direction of the plurality of second step surfaces are parallel to or intersect with each other.

[0022] In a possible implementation, a plurality of the light-emitting elements and a plurality of the collimating elements are arranged in the housing at intervals;

[0023] The plurality of focusing elements are arranged on the housing and are located on a side of the collimating element away from the light emitting element.

[0024] In a possible implementation, the housing includes a bottom plate, a side plate and a cover member, wherein the side plate is disposed on one side of the bottom plate and encloses a receiving cavity with an opening together with the bottom plate; the cover member covers the opening;

[0025] A plurality of the light-emitting components and a plurality of the collimating components are arranged in the accommodating cavity; and a plurality of the focusing components are arranged on the covering component at intervals.

[0026] In a possible implementation, the plurality of focusing members and the covering member are integrated into one piece.

[0027] In a possible implementation, the laser scribing device further includes a cooling element, and the cooling element is disposed on the housing.

[0028] A second aspect of an embodiment of the present application provides a laser scribing device, comprising at least one laser scribing component as described in the first aspect.

[0029] In a possible implementation, the laser scribing device further includes a dust removal member, which is disposed on one side of the housing and is located on a transmission path of the laser beam transmitted to the outside of the housing via the focusing member;

[0030] The dust removal component is used to clean the impurities generated by the laser scribing assembly during the scribing process.

[0031] In a possible implementation, the laser scribing device further includes a filter, which is disposed on one side of the housing and located on a transmission path of the laser beam transmitted to the outside of the housing via the focusing element;

[0032] The filter element is used to filter impurities carried in the laser beam.

[0033] In a possible implementation, the laser scribing device further includes at least one power supply, and at least one of the power supplies is electrically connected to at least one of the laser scribing components.

[0034] In a possible implementation, there are multiple power supply components and multiple laser scribing components;

[0035] The number of the power supply components is less than the number of the laser scribing components; each of the power supply components is electrically connected to a portion of the laser scribing components;

[0036] Alternatively, the number of the power supply components is equal to the number of the laser scribing components, and each of the power supply components is electrically connected to the corresponding laser scribing component.

[0037] A third aspect of the embodiments of the present application provides a laser scribing device, comprising: an unwinding mechanism, a conveying mechanism, a rewinding mechanism, and the laser scribing device according to the second aspect; the laser scribing device comprises a plurality of laser scribing components;

[0038] The unwinding mechanism and the rewinding mechanism are arranged at intervals, and the unwinding mechanism is used to unwind the pole coil;

[0039] The conveying mechanism is arranged between the unwinding mechanism and the rewinding mechanism, and is used for conveying the pole coil;

[0040] The laser scribing device is arranged on one side of the conveying path of the pole roll; wherein a plurality of the laser scribing assemblies are arranged at intervals along the conveying path perpendicular to the pole roll to scribing the pole roll;

[0041] The winding mechanism is used to wind up the pole roll that has completed the marking.

[0042] In a possible implementation, the number of the laser scribing devices is two; the two laser scribing devices are arranged at intervals on the conveying path of the pole roll;

[0043] A plurality of laser scribing assemblies of one of the laser scribing devices form a plurality of first scribing lines on the pole roll, and a plurality of laser scribing assemblies of another laser scribing device form a second scribing line on the pole roll;

[0044] Any one of the first scribe lines is located between two adjacent second scribe lines.

[0045] In a possible implementation, the two laser scribing devices are respectively located on both sides of the pole roll in the thickness direction.

[0046] A fourth aspect of the embodiment of the present application further provides a marking method of a laser marking device, wherein the laser marking device comprises an unwinding mechanism, a conveying mechanism, a rewinding mechanism, and two laser marking devices; the two laser marking devices are arranged at intervals on the conveying path of the pole roll, and each of the laser marking devices comprises a plurality of laser marking components, and the plurality of laser marking components are arranged at intervals perpendicular to the conveying path of the pole roll;

[0047] The marking method comprises:

[0048] Installing the pole coil to the unwinding mechanism, the unwinding mechanism is used to unwind the pole coil;

[0049] The pole roll unwound by the unwinding mechanism is transferred to one of the laser scribing devices by the conveying mechanism; the laser scribing device forms a plurality of first scribing lines on the pole roll;

[0050] The pole roll formed with a plurality of the first scribe lines is continuously transferred to another laser scribing device through the conveying mechanism; the laser scribing device forms a plurality of second scribe lines on the pole roll; any one of the second scribe lines is located between two adjacent first scribe lines;

[0051] The pole roll having a plurality of the first marking lines and a plurality of the second marking lines is continuously formed through the conveying mechanism and is transmitted to the winding mechanism; the winding mechanism is used to wind up the pole roll having completed the marking lines.

[0052] In the laser scribing assembly, laser scribing device, laser scribing equipment and scribing method provided in the embodiments of the present application, the laser scribing assembly includes a housing, a plurality of light-emitting components and a plurality of optical path components, and the laser beam emitted by each light-emitting component is collimated and focused in turn through the corresponding optical path component to form a laser beam. With such an arrangement, each light-emitting component and optical path component can be individually controlled, which helps to ensure that the energy distribution of multiple laser beams is consistent, avoids the energy of some laser beams being too strong or too weak, and forms a stable laser beam output.

[0053] 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 assembly, laser scribing device, laser scribing equipment and scribing method 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

[0054] 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.

[0055] Figure 1 A schematic diagram of the structure of a laser scribing assembly provided in an embodiment of the present application;

[0056] Figure 2 An internal schematic diagram of a laser scribing assembly provided in an embodiment of the present application;

[0057] Figure 3 A partial schematic diagram of a laser scribing assembly provided in an embodiment of the present application;

[0058] Figure 4 A schematic diagram of a laser scribing assembly and a pole roll provided in an embodiment of the present application;

[0059] Figure 5 A schematic diagram of the structure of a laser scribing device provided in an embodiment of the present application;

[0060] Figure 6A schematic diagram of a laser scribing device provided in an embodiment of the present application;

[0061] Figure 7 Schematic diagram of the laser scribing device and pole roll provided in an embodiment of the present application.

[0062] Description of reference numerals:

[0063] 10: housing; 11: bottom plate; 12: side plate; 13: accommodating cavity; 14: second power supply terminal; 15: cover member;

[0064] 20: luminous parts;

[0065] 30: optical path component; 31: collimating component; 32: focusing component; 40: first supporting component; 41: first step surface;

[0066] 50: second support member; 51: second step surface;

[0067] 61: dust removal element; 62: filter element;

[0068] 70: cooling element; 80: electric control box;

[0069] 90: Extreme volume;

[0070] 100: unwinding mechanism;

[0071] 110: conveying mechanism;

[0072] 120: winding mechanism;

[0073] 130: Laser scribing assembly;

[0074] 140: Laser scribing device;

[0075] 150: Laser scribing equipment. DETAILED DESCRIPTION

[0076] As described in the background technology, there is a technical problem in the related art that the depth consistency of multiple lines formed by the laser scribing device is relatively poor. The inventors have found that the reason for this problem is that the laser scribing device of the related art usually includes a light-emitting component and a galvanometer system, the light-emitting component is used to emit a laser beam; the galvanometer system usually includes multiple galvanometers and at least one drive motor. During use, at least one drive motor is used to drive the galvanometer to rotate, thereby changing the reflection direction of the laser beam. However, within the width range of the galvanometer, the light spot received by the format far away from the center of the laser beam is large and low in energy, while the light spot received by the format close to the center of the laser beam is small and high in energy, which leads to uneven energy of the laser beam.

[0077] In view of the above technical problems, the embodiments of the present application provide a laser scribing assembly, a laser scribing device, a laser scribing equipment and a scribing method, wherein the laser scribing assembly includes a housing, a plurality of light-emitting components and a plurality of optical path components, and the laser beam emitted by each light-emitting component is collimated and focused in turn through the corresponding optical path component to form a laser beam. With such an arrangement, each light-emitting component and optical path component can be individually controlled, which helps to ensure consistent energy distribution of multiple laser beams, avoid excessive or weak energy of some laser beams, and form a stable laser beam output.

[0078] 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.

[0079] The embodiment of the present application provides a laser scribing assembly 130, which is used to generate a laser beam to form a scribing line 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.

[0080] Please refer to the attached Figure 1 , Attachment Figure 2 and attached Figure 3 The laser scribing assembly 130 includes a housing 10. The housing 10 is used as the main bearing component of the laser scribing assembly 130 to provide bearing for other components of the laser scribing assembly 130; or, the housing 10 can also be used as a connecting component of the laser scribing assembly 130 to facilitate the installation of the laser scribing assembly 130 into the laser scribing device 150, for example, the housing 10 is fixedly connected to other components of the laser scribing device 150.

[0081] It should be noted that, in order to facilitate installation of at least some of the components of the laser scribing assembly 130 except the housing 10 into the housing 10, the housing 10 at least includes a receiving cavity 13 with an opening, so that at least some of the components except the housing 10 can be installed into the receiving cavity 13 through the opening. The housing 10 can be an integral part or a split part. For example, please continue to refer to the attached Figure 1 and attached Figure 2The housing 10 includes a bottom plate 11 and a side plate 12, and the side plate 12 is arranged on one side of the bottom plate 11. The bottom plate 11 and the side plate 12 enclose a receiving cavity 13 with an opening. In this way, other components of the laser scribing assembly can be installed in the receiving cavity 13 through the opening, which improves the installation convenience of other components of the laser scribing assembly, such as the light emitting element 20 and the optical path assembly 30.

[0082] It should be noted that the shape of the shell 10 can be selected in many ways. For example, the shape of the shell 10 can be cylindrical or square; for another example, the shape of the shell 10 can be irregular, and this embodiment does not make any specific limitation here.

[0083] The shell 10 may be made of metal. For example, the shell 10 is made of copper, which has good heat dissipation performance and can quickly and effectively conduct the heat generated by the light-emitting element 20 and other heat sources to the external environment, which helps to maintain the temperature inside the shell 10 stable and prevent overheating, thereby extending the service life of the laser scribing assembly and improving its reliability.

[0084] Please continue to refer to the attached Figure 2 and attached Figure 3 , the laser scribing assembly 130 also includes a plurality of light-emitting components 20, and the plurality of light-emitting components 20 are arranged at intervals in the housing 10. Each light-emitting component 20 generates a high-energy-density laser beam by exciting a laser medium. Among them, the laser medium is the core material for generating lasers. The laser medium may include gas, liquid, solid or semiconductor. Exemplarily, the light-emitting component 20 is a semiconductor laser, that is, the material capable of generating lasers is a semiconductor material. When the laser scribing device is applied to the battery field, for example, when the laser scribing device can be used to scribing the pole piece, the light-emitting component 20 with low power and semiconductor material as the laser medium can be used to etch the pole roll, so that the adhesive between the dressings on the surface of the pole roll is carbonized and loses its viscosity, and at the same time, the spot energy threshold of the laser beam is not enough to vaporize the components of the dressing, so that no smoke-like dust, plasma or sputtering dressing is produced, so there is no risk of light blocking and dust accumulation, and the consistency of the scribing depth is ensured. In addition, the dressing that has lost its viscosity can be easily removed by brushing and ultrasonic dust removal to ensure the quality of the pole roll.

[0085] It should be noted that the number of the light emitting elements 20 can be freely set according to actual needs. For example, the number of the light emitting elements 20 is seven.

[0086] The laser scribing assembly 130 further includes a plurality of optical path assemblies 30, which are disposed in the housing 10 and correspond to the plurality of light emitting elements 20 one by one, that is, one optical path assembly 30 corresponds to one light emitting element 20. Each optical path assembly 30 is located on the transmission path of the laser beam generated by the corresponding light emitting element 20.

[0087] Among them, the optical path component 30 includes a collimator 31 and a focusing component 32. The collimator 31 is used to collimate the laser beam, that is, it can convert the divergent beam into a parallel beam to reduce the divergence angle of the laser beam, thereby improving the quality and stability of the laser beam. The collimator 31 is usually composed of a lens, a reflector or other optical elements. The focusing component 32 can focus the laser beam passing through the collimator 31 so that the laser beam is focused to a point or a specific area. Among them, the focusing component 32 is usually composed of a lens, a reflector or other optical elements.

[0088] In this embodiment, the plurality of collimating components 31 are mutually independent separate components, and / or the plurality of focusing components 32 are mutually independent separate components. On the one hand, the most suitable collimating components 31 and focusing components 32 can be selected according to different application scenarios to achieve the best beam collimation and focusing effects, thereby improving the overall performance of the laser scribing assembly. On the other hand, when any of the collimating components 31 and / or focusing components 32 fails, the failed collimating components 31 and / or focusing components 32 can be replaced separately, which can simplify the maintenance process of the laser scribing assembly and reduce the maintenance cost.

[0089] It should be noted that the collimating element 31 and the focusing element 32 are arranged in the housing 10, which can be understood as both being arranged in the housing 10, or as the collimating element 31 being arranged in the housing 10 and the focusing element 32 being arranged on the housing 10. The specific arrangement needs to be freely arranged according to the actual situation.

[0090] Exemplarily, a plurality of light-emitting elements 20 and a plurality of collimating elements 31 are arranged at intervals in the housing 10; a plurality of focusing elements 32 are arranged on the housing 10 and are located on the side of the collimating element 31 away from the light-emitting element 20. For example, the housing 10 may further include a cover element 15, which is connected to the housing 10 and covers the opening. A plurality of focusing elements 32 are arranged at intervals on the cover element 15. In this embodiment, the housing 10 is formed into a complete whole by covering the opening of the housing 10 with the cover element 15, so that the light-emitting element 20 arranged in the housing 10 is prevented from being corroded by external impurities or water vapor, thereby improving the safety and service life of the light-emitting element 20.

[0091] In addition, the cover 15 and the multiple focusing members 32 can also be an integral part, which can be formed by injection molding and stamping processes. In this way, on the one hand, the structural stability of the cover 15 and the multiple focusing members 32 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 assembly 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 multiple focusing members 32 are precisely consistent, thereby improving the focusing accuracy of the laser beam.

[0092] In other embodiments, the cover member 15 is not only disposed at the opening of the shell 10, but also can be disposed in the accommodating cavity 13, so that the distance between the collimating member 31 and the focusing member 32 can be reasonably adjusted, thereby ensuring the stability of the multiple laser light beams formed.

[0093] In this embodiment, one optical path component 30 corresponds to one light emitting element 20, so that each laser beam emitted by the light emitting element 20 passes through the corresponding collimating element 31 and is transmitted to the outside of the housing 10 via the corresponding focusing element 32. Multiple independent laser beams can be emitted by multiple light emitting elements 20, and each laser beam forms a laser beam that meets the requirements after passing through the corresponding optical path component 30. With such a configuration, each light emitting element 20 and optical path component 30 can be controlled separately, which helps to ensure consistent energy distribution of multiple laser beams, avoid excessive or weak energy of some laser beams, and form a stable laser beam output, thereby ensuring the depth consistency of multiple engraved lines, thereby improving the performance of the product prepared by the laser scribing device.

[0094] In addition, the laser scribing assembly 130 designed in the present application relies on the mutual cooperation of the light emitting element 20 and the optical path assembly 30 to achieve the requirement of multiple laser beams. Compared with the related art, the layout of the beam combiner, jumper and isolator can be eliminated, making the structure of the laser scribing assembly simpler and the manufacturing cost lower.

[0095] It should be understood that the layout of the multiple light-emitting elements 20 and the multiple collimating elements 31 can be designed according to the actual requirements for the laser beam. In one possible example, at least one of the multiple light-emitting elements 20 and the multiple collimating elements 31 is arranged in a stepped manner in the shell, and the corresponding light-emitting elements 20 and collimating elements 31 are located on the same plane. In one example, one of the multiple light-emitting elements 20 and the multiple collimating elements 31 is arranged in a stepped manner in the shell 10. For example, the multiple light-emitting elements 20 are arranged in a stepped manner in the shell 10. That is, the projections of the multiple light-emitting elements 20 on the bottom plate 11 are staggered, and the projections on the side plate 12 are staggered. In other words, with the attached Figure 2 Taking the orientation shown as an example, a plurality of light emitting elements 20 are staggered in the vertical orientation and the left-right orientation.

[0096] In another example, the plurality of light emitting elements 20 and the plurality of collimating elements 31 are arranged in a stepped manner in the housing 10 .

[0097] The housing 10 in which the multiple light-emitting elements 20 are arranged in a stepped manner can, on the one hand, allow the laser beams emitted by each light-emitting element 20 to be spaced apart from each other, thereby avoiding interference between adjacent laser beams, ensuring the independence of each laser beam, and thus improving the quality and stability of each laser beam. On the other hand, the staggered arrangement can also be beneficial to the heat dissipation of the light-emitting element 20, reducing the influence of thermal effects on the quality of the laser beam. At the same time, when the multiple collimating elements 31 are also arranged in a stepped manner in the housing 10, interference between adjacent laser beams can also be avoided, thereby improving the quality and stability of each laser beam.

[0098] This embodiment also arranges the light emitting member 20 and the collimating member 31 on the same plane, for example, the connecting line between the corresponding light emitting member 20 and the collimating member 31 is perpendicular to the bottom plate 11, so that the alignment process of the optical device in the laser scribing assembly can be simplified, thereby reducing the parameters that need to be adjusted during the installation and debugging process, and reducing the complexity and debugging difficulty of the laser scribing assembly. In addition, the corresponding light emitting member 20 and the collimating member 31 are located on the same plane, which can optimize the spatial layout, reduce the waste of space, and improve the overall efficiency of the laser scribing assembly.

[0099] In a possible implementation, a plurality of light-emitting elements 20 and a plurality of collimating elements 31 are arranged in a stepped manner in the housing 10; the corresponding light-emitting elements 20 and collimating elements 31 constitute an optical component group, or in other words, the light-emitting elements 20 and collimating elements 31 located on the same plane constitute an optical component group.

[0100] The distance between the light emitting element 20 and the collimating element 31 in all optical component groups is equal. In this way, the optical path length of each optical component group is ensured to be consistent, which helps to ensure the consistency of the optical performance of each optical component group, thereby improving the optical output quality and stability of the entire laser scribing assembly 130.

[0101] It should be noted that the light emitting member 20 and the collimating member 31 can be connected to the housing 10 through a connecting member. Exemplarily, the laser scribing assembly further includes a first support member 40 and a second support member 50, the first support member 40 and the second support member 50 are arranged at intervals on the housing 10, and the first support member 40 is located on the side of the second support member 50 facing the light emitting member 20; that is, the first support member 40 is located between the second support member 50 and the light emitting member 20. It should be noted that the first support member 40 and the housing 10 can be an integral structure, for example, the first support member 40 and the housing 10 are prepared by a casting process, which can improve the structural strength of the housing 10 and the first support member 40. The first support member 40 and the housing 10 can also be a split structure, for example, the first support member 40 is fixedly connected to the housing 10 by a welding process, and the size of the first support member 40 can be reasonably set according to actual needs.

[0102] The light transmittance of the second support member 50 is greater than its refractive index, or in other words, the second support member 50 prevents the second support member 50 from obstructing the transmission of the laser beam. Exemplarily, the material of the second support member 50 may include light-transmitting glass, and the properties of the light-transmitting glass may be changed so that the second support member 50 can allow the laser beam with a wavelength of 976 nm to pass through.

[0103] Please continue to refer to the attached Figure 3 The plurality of light emitting members 20 are arranged in a stepped manner on the first support member 40, and the plurality of collimating members 31 are arranged in a stepped manner on the second support member 50. The arrangement of the first support member 40 and the second support member 50 facilitates the rapid installation of the plurality of light emitting members 20 and the plurality of collimating members 31 into the housing 10.

[0104] In order to facilitate the stepped distribution of multiple light-emitting components 20 and multiple collimating components 31, the first support component 40 in the present embodiment is provided with multiple first step surfaces 41, and a light-emitting component 20 is provided on each first step surface 41; the second support component 50 is provided with multiple second step surfaces 51, and a collimating component 31 is provided on each second step surface 51; the multiple first step surfaces 41 and the multiple second step surfaces 51 are correspondingly flush, so that the light-emitting components 20 and the collimating components 31 can be positioned more accurately, so that the light-emitting components 20 and the corresponding collimating components 31 are located on the same plane, thereby realizing accurate collimation and focusing of the laser beam and improving the optical performance of the laser scribing assembly.

[0105] It should be understood that, under the premise of ensuring that the plurality of first step surfaces 41 and the plurality of second step surfaces 51 are correspondingly flush, there are multiple options for the arrangement direction of the plurality of first step surfaces 41 and the arrangement direction of the plurality of second step surfaces 51 .

[0106] For example, the arrangement direction of the plurality of first step surfaces 41 is parallel to or intersects with the arrangement direction of the plurality of second step surfaces 51. In order to more clearly describe the arrangement direction, it is convenient to define the vertical direction from the bottom plate 11 to the opening (or the transmission direction of the laser beam) as the first direction. Figure 2 Middle X direction.

[0107] When the arrangement direction of the plurality of first step surfaces 41 is parallel to the arrangement direction of the plurality of second step surfaces 51, the arrangement direction may be at an acute angle or an obtuse angle with the first direction. In other words, when the arrangement direction is at an acute angle with the first direction, the heights of the plurality of first step surfaces 41 and the plurality of second step surfaces 51 gradually decrease along the first direction and away from the bottom plate 11. When the arrangement direction is at an obtuse angle with the first direction, the heights of the plurality of first step surfaces 41 and the plurality of second step surfaces 51 gradually increase along the first direction and away from the bottom plate 11.

[0108] When the arrangement direction of the plurality of first step surfaces 41 intersects with the arrangement direction of the plurality of second step surfaces 51 , it can be understood that one of the two arrangement directions forms an acute angle with the first direction, and the other forms an obtuse angle with the first direction.

[0109] In a possible implementation, the laser scribing assembly further includes a cooling member 70, which is disposed on the housing 10. Exemplarily, the cooling member 70 is disposed on the side plate 12 of the housing 10 and is opposite to the plurality of light-emitting members 20. In this way, the heat generated by the light-emitting members 20 can be directly and effectively dissipated, and the light-emitting members 20 can be prevented from overheating by timely dissipating the heat, thereby extending their service life and improving their working stability.

[0110] The cooling element 70 may adopt a variety of cooling schemes, such as air cooling, water cooling or thermoelectric cooling, etc. The most suitable cooling method may be selected according to actual needs, providing flexible design and application options.

[0111] In this example, in the direction perpendicular to the bottom plate 11, the size of the cooling member 70 is smaller than that of the side plate 12. On the premise of ensuring that the cooling member 70 dissipates heat for multiple light-emitting members 20 in a timely manner, the size of the cooling member 70 is also reduced, thereby reducing the production and operation costs of the cooling member 70.

[0112] Please refer to the attached Figure 5 The embodiment of the present application further provides a laser scribing device 140, which includes the laser scribing assembly 130 described in any of the above embodiments. Therefore, the structure and beneficial effects of the laser scribing device 140 including the laser scribing assembly 130 are not further described in this embodiment.

[0113] The laser scribing device 140 includes a dust removal member 61, which is disposed on one side of the housing 10 and is located on the transmission path of the laser beam transmitted to the outside of the housing 10 via the focusing member 32. The dust removal member 61 is used to clean impurities generated by the laser scribing assembly 130 during the scribing process.

[0114] Among them, the dust removal component 61 may include a dust cover, a beam inlet, a beam outlet and a dust removal fan. The beam inlet and the beam outlet are relatively arranged on the dust cover and are located on the transmission path of the laser beam; the dust removal fan is interconnected with the inner cavity of the dust cover. When the laser beam is marking on the pole roll, impurities will be generated, wherein the impurities may include waste chips or dust. Through the provision of the dust removal component 61, this embodiment can remove impurities such as waste chips and dust generated during the laser marking process in real time, thereby avoiding interference and scattering of the laser beam by these impurities, thereby ensuring the stability and accuracy of the laser beam and improving the accuracy and consistency of marking. At the same time, a clean working environment also reduces the negative impact of impurities on the surface quality of the marking, such as scratches and stains, and improves the overall quality of the product.

[0115] In other embodiments, the laser scribing device 140 further includes a filter 62, which is disposed on one side of the shell 10 and is located on a transmission path of the laser beam transmitted to the outside of the shell 10 via the focusing element 32; the filter 62 is used to filter impurities carried in the laser beam.

[0116] It should be noted that the filter element 62 may be of various types. For example, the dust removal element 61 may be an optical filter, a diffraction grating or other structures.

[0117] The filter 62 is used to filter impurities carried in the laser beam. For example, the "impurity light" may include but is not limited to unnecessary wavelengths, scattered light and other optical noises, etc. The impurity light can be filtered by the filter 62, which significantly improves the purity of the laser beam and makes the output laser beam more single and stable.

[0118] There are multiple options for the relative position of the filter 62 and the dust removal member 61. In one example, the filter 62 can be disposed on the dust removal member 61, for example, the filter 62 can be disposed at the light beam entrance of the dust removal cover; in another example, the filter 62 can also be disposed in the dust removal cover and located directly below the light beam entrance, so that the filter 62 can also filter impurities such as waste and dust generated during the laser scribing process. In another example, the filter 62 can also be disposed on the side of the dust removal member 61 facing the laser scribing assembly 130, or in other words, the filter 62 is disposed above the dust removal member 61.

[0119] In a possible implementation, the laser scribing device 140 further includes at least one power supply, and the at least one power supply is electrically connected to at least one laser scribing assembly 130. In this embodiment, the laser scribing assembly 130 includes multiple power supplies, and the power supply can supply power to one laser scribing assembly 130 or multiple laser scribing assemblies 130.

[0120] In one example, the number of power supplies is less than the number of laser scribing assemblies 130; each power supply is electrically connected to a portion of the laser scribing assemblies. For example, each power supply can be used to power five laser scribing assemblies, thereby reducing the number of power supplies, simplifying the electrical design and wiring of the laser scribing assemblies, and thereby reducing the complexity of electrical connections, and reducing the difficulty of installation and maintenance. In addition, each power supply supplies power to multiple laser scribing assemblies, which can optimize the utilization of the power supply, improve the power supply efficiency, reduce power loss, and improve the energy efficiency ratio of the laser scribing assemblies.

[0121] In another example, the number of power supplies is equal to the number of laser scribing assemblies 130, and each power supply is electrically connected to a corresponding laser scribing assembly 130. That is, one power supply is electrically connected to the laser scribing assembly 130, so that the energy balance of the laser scribing assembly can be ensured.

[0122] In this embodiment, the power supply includes a first power supply end, and a second power supply end 14 is provided on the shell 10 of the laser scribing assembly 130, and the second power supply end 14 is electrically connected to the plurality of light-emitting elements 20 respectively; the first power supply end and the second power supply end 14 are electrically connected.

[0123] In this embodiment, the same power supply is used to power multiple light-emitting components 20. Since the power supply can output current stably, the multiple light-emitting components 20 can output energy stably. At the same time, combined with the fixed connection of the collimating component 31 and the focusing component 32, a stable spot diameter and energy are formed, thereby ensuring the consistency of the engraving line depth and width.

[0124] It should be noted that the power supply member may be a power supply circuit board, and the power supply circuit board is arranged in the electric control box 80. Among them, other controllers are also arranged in the electric control box.

[0125] Please refer to the attached Figure 6 and attached Figure 7 The embodiment of the present application also provides a laser scribing device, which can scribing the pole roll 90 of the battery.

[0126] The laser scribing device comprises an unwinding mechanism 100, a conveying mechanism 110, a rewinding mechanism 120 and the laser scribing device 140 described in the above embodiment. The unwinding mechanism 100 and the rewinding mechanism 120 are arranged at intervals, and the unwinding mechanism 100 is used to unwind the pole roll 90.

[0127] The conveying mechanism 110 is arranged between the unwinding mechanism 100 and the rewinding mechanism 120, and is used to convey the pole roll 90; the laser marking device 140 is arranged on the conveying path of the pole roll 90; wherein, the multiple laser marking components 130 of the laser marking device 140 are arranged at intervals along the conveying path perpendicular to the pole roll 90 to mark the pole roll 90.

[0128] In this embodiment, the conveying mechanism 110 is located downstream of the unwinding mechanism 100, and is used to convey the pole roll 90 to the laser scribing device 140 for scribing. The reeling mechanism 120 is used to reel the pole roll 90 that has been scribed. It should be noted that the unwinding mechanism 100, the conveying mechanism 110, and the reeling mechanism 120 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.

[0129] It should be noted that the number of the laser scribing devices 140 in this embodiment can be one or two. For example, in this embodiment, the number of the laser scribing devices 140 is two, and the two laser scribing devices 140 are arranged at intervals between the unwinding mechanism 100 and the rewinding mechanism 120, or the two laser scribing devices 140 are arranged at intervals on the conveying path of the pole roll 90.

[0130] Multiple laser marking components 130 of one laser marking device 140 form multiple first marking lines on the pole roll 90, and multiple laser marking components 130 of another laser marking device 140 form second marking lines on the pole roll 90; any first marking line is located between two adjacent second marking lines.

[0131] In this embodiment, the laser scribing device 140 close to the unwinding mechanism 100 performs the first scribing operation on the pole coil, and the laser scribing device 140 far from the unwinding mechanism 100 performs the second scribing operation on the pole coil. The two scribing operations form the scribed lines on the pole coil, which can form a more complex and sophisticated scribing layout. For example, the depth of the scribed lines and the spacing between adjacent scribed lines can be reasonably set according to the actual needs of the product, thereby improving the performance of the formed product (such as the conductivity and heat dissipation of the battery pole piece, etc.).

[0132] In some embodiments, two laser scribing devices 140 are respectively located on both sides of the pole roll 90 in the thickness direction, so that the first scribing line and the second scribing line are located on two surfaces of the pole roll 90 in the thickness direction, which can ensure that the processing effects of the two surfaces are consistent, thereby balancing the overall performance of the pole roll 90.

[0133] The embodiment of the present application also provides a marking method of a laser marking device, wherein the laser marking device includes an unwinding mechanism 100, a conveying mechanism 110, a rewinding mechanism 120, and two laser marking devices 140; the two laser marking devices 140 are arranged at intervals on the conveying path of the pole roll, and each of the laser marking devices 140 includes a plurality of laser marking components 130, and the plurality of laser marking components 130 are arranged at intervals perpendicular to the conveying path of the pole roll;

[0134] Line drawing methods include:

[0135] Installing the pole coil to the unwinding mechanism, the unwinding mechanism is used to unwind the pole coil;

[0136] The pole roll unwound by the unwinding mechanism is transferred to one of the laser scribing devices by the conveying mechanism; the laser scribing device forms a plurality of first scribing lines on the pole roll;

[0137] The pole roll formed with a plurality of the first scribe lines is continuously transferred to another laser scribing device through the conveying mechanism; the laser scribing device forms a plurality of second scribe lines on the pole roll; any one of the second scribe lines is located between two adjacent first scribe lines;

[0138] The pole roll having a plurality of the first marking lines and a plurality of the second marking lines is continuously formed through the conveying mechanism and is transmitted to the winding mechanism; the winding mechanism is used to wind up the pole roll having completed the marking lines.

[0139] In order to facilitate the detailed description of the laser scribing method, the two laser scribing devices 140 may be referred to as the first laser scribing device and the second laser scribing device, and the first laser scribing device is located between the unwinding mechanism 100 and the second laser scribing device. Figure 7 In the figure, the laser scribing components located in the first row are used to represent the first laser scribing device, the laser scribing components located in the second row are used to represent the second laser scribing device, and the attached Figure 7 It is only to show the arrangement and relative positions of the multiple laser scribing components of the first laser scribing device and the multiple laser scribing components of the second laser scribing device, not the actual positions of the two laser scribing devices.

[0140] Correspondingly, the conveying mechanism 110 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 90 to the first laser marking device, the second conveying section is used to convey the pole roll 90 that has completed the first marking to the second laser marking device, and the third conveying section is used to convey the pole roll 90 that has completed the first and second markings to the winding mechanism 120.

[0141] The laser marking method includes the following steps:

[0142] The pole coil is unwound by using an unwinding mechanism, and is transported to below the first laser scribing device through a first conveying section to ensure the flatness of the pole coil.

[0143] Afterwards, the first laser scribing device stably outputs a laser beam to the moving pole roll, thereby forming a plurality of first scribing lines on the A surface of the pole roll.

[0144] In this step, the light emitting element of the first laser scribing device may be started first, that is, the power supply element is started to provide power to the light emitting element, wherein the light emitting element adopts a semiconductor laser chip with a power of 1-50W.

[0145] The collimating parts include a collimating lens, the focal length of the collimating lens is 30-100mm, and the effective distance after collimation is greater than 500mm. The focal length of the focusing lens is 30-200mm, and the spot diameter after focusing is less than 100μm, and the heat-affected area is less than 250μm.

[0146] In actual use, the marking operation can be performed on a pole coil with a length of 30 mm to 100 mm. Specifically, the pole coil movement speed can be 10 mm / s to 100 mm / s, and the speed of the pole coil movement depends on the energy of the light-emitting element.

[0147] 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;

[0148] The second laser scribing device stably outputs a laser beam to the moving pole roll, thereby forming a plurality of second scribing lines on the B surface of the pole roll. The distribution of the first scribing lines and the second scribing lines can be referred to in the attached Figure 7 .

[0149] After the first scribing line and the second scribing line are formed, the third conveying section conveys the pole coil with the scribing lines completed to the winding mechanism, and the winding mechanism performs a winding operation on the pole coil with the scribing lines completed.

[0150] In this example, the power supply directly supplies power to the multiple light-emitting components in each laser scribing assembly, so each light-emitting component directly supplies power and cooperates with the collimator and focusing lens to form a tiny high-energy light spot. The multiple light-emitting components respectively emit multiple tiny high-energy light spots, which act on the surface of the uniformly moving pole roll at equal intervals to form multiple scribing lines.

[0151] 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.

[0152] 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.

[0153] 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 assembly, characterized in that: include: Housing (10); A plurality of light-emitting elements (20), wherein the plurality of light-emitting elements (20) are arranged at intervals in the housing (10) and are used to generate laser beams; A plurality of optical path components (30), wherein the plurality of optical path components (30) are arranged on the housing (10) and are arranged in one-to-one correspondence with the plurality of light-emitting components (20); each of the optical path components (30) is located on a transmission path of the laser light beam generated by the corresponding light-emitting component (20); wherein each of the optical path components (30) comprises a collimating component (31) and a focusing component (32); Each laser light beam emitted by the light-emitting element (20) passes through the corresponding collimating element (31) and is transmitted to the outside of the housing (10) via the corresponding focusing element (32).

2. The laser scribing assembly according to claim 1, characterized in that: At least one of the plurality of light-emitting components (20) and the plurality of collimating components (31) is arranged in a stepped manner inside the housing (10), and the corresponding light-emitting components (20) and collimating components (31) are located on the same plane.

3. The laser scribing assembly according to claim 2, characterized in that: The plurality of light-emitting elements (20) and the plurality of collimating elements (31) are arranged in a stepped manner inside the housing (10); The corresponding light-emitting components (20) and the collimating components (31) form an optical component group, and the distances between the light-emitting components (20) and the collimating components (31) in all the optical component groups are equal.

4. The laser scribing assembly according to claim 1, characterized in that: The plurality of collimating components (31) are separate components that are independent of each other, and / or the plurality of focusing components (32) are separate components that are independent of each other.

5. The laser scribing assembly according to any one of claims 1 to 4, characterized in that: The laser scribing assembly further comprises a first support member (40) and a second support member (50), wherein the first support member (40) and the second support member (50) are arranged at intervals on the housing (10), and the first support member (40) is located on a side of the second support member (50) facing the light emitting member (20); the light transmittance of the second support member (50) is greater than its refractive index; The plurality of light-emitting elements (20) are arranged on the first support element (40) in a stepped manner, and the plurality of collimating elements (31) are arranged on the second support element (50) in a stepped manner.

6. The laser scribing assembly according to claim 5, characterized in that: The first support member (40) is provided with a plurality of first step surfaces (41), and each of the first step surfaces (41) is provided with one of the light-emitting members (20); The second support member (50) is provided with a plurality of second step surfaces (51), and each of the second step surfaces (51) is provided with one of the collimating members (31); The plurality of first step surfaces (41) and the plurality of second step surfaces (51) are correspondingly flush.

7. The laser scribing assembly according to claim 6, characterized in that: The arrangement direction of the plurality of first step surfaces (41) and the arrangement direction of the plurality of second step surfaces (51) are parallel to or intersect with each other.

8. The laser scribing assembly according to any one of claims 1 to 4, characterized in that: A plurality of the light-emitting elements (20) and a plurality of the collimating elements (31) are arranged at intervals in the housing (10); The plurality of focusing elements (32) are arranged on the housing (10) and are located on a side of the collimating element (31) facing away from the light-emitting element (20).

9. The laser scribing assembly according to claim 8, characterized in that: The housing (10) comprises a bottom plate (11), a side plate (12) and a cover member (15); the side plate (12) is arranged on one side of the bottom plate (11) and encloses a receiving cavity (13) having an opening together with the bottom plate (11); the cover member (15) covers the opening; A plurality of the light-emitting components (20) and a plurality of the collimating components (31) are arranged in the accommodating cavity (13); and a plurality of the focusing components (32) are arranged at intervals on the cover component (15).

10. The laser scribing assembly according to claim 9, characterized in that: The plurality of focusing components (32) and the sealing component (15) are integrated into one piece.

11. The laser scribing assembly according to any one of claims 1 to 4, characterized in that: The laser scribing assembly further comprises a cooling element (70), wherein the cooling element (70) is arranged on the housing.

12. A laser scribing device, characterized in that: Comprising at least one laser scribing assembly according to any one of claims 1-11.

13. The laser scribing device according to claim 12, characterized in that: The laser scribing device further comprises a dust removal member (61), wherein the dust removal member (61) is arranged on one side of the housing (10) of the laser scribing assembly and is located on a transmission path of the laser beam transmitted to the outside of the housing (10) via the focusing member (32) of the laser scribing assembly; The dust removal component (61) is used to clean impurities generated by the laser scribing component during the scribing process.

14. The laser scribing device according to claim 13, characterized in that: The laser scribing device further comprises a filter (62), wherein the filter (62) is arranged on one side of the housing (10) and is located on a transmission path of the laser beam transmitted to the outside of the housing (10) via the focusing element (32); The filter element (62) is used to filter impurities carried in the laser beam.

15. The laser scribing device according to claim 13 or 14, characterized in that: The laser scribing device further comprises at least one power supply, and at least one of the power supplies is electrically connected to at least one of the laser scribing components.

16. The laser scribing device according to claim 15, characterized in that: The number of the power supply and the number of the laser scribing components are both multiple; The number of the power supply components is less than the number of the laser scribing components; each of the power supply components is electrically connected to a portion of the laser scribing components; Alternatively, the number of the power supply components is equal to the number of the laser scribing components, and each of the power supply components is electrically connected to the corresponding laser scribing component.

17. A laser scribing device, characterized in that: It comprises an unwinding mechanism (100), a conveying mechanism (110), a rewinding mechanism (120), and a laser scribing device (140) as claimed in any one of claims 12 to 16; the laser scribing device (140) comprises a plurality of laser scribing components (130); The unwinding mechanism (100) and the rewinding mechanism (120) are arranged at intervals, and the unwinding mechanism (100) is used to unwind the pole coil (90); The conveying mechanism (110) is arranged between the unwinding mechanism (100) and the rewinding mechanism (120) and is used to convey the pole coil (90); The laser scribing device (140) is arranged on one side of the conveying path of the pole roll (90); wherein a plurality of the laser scribing assemblies (130) are arranged at intervals along the conveying path perpendicular to the pole roll (90) to scribing the pole roll (90); The winding mechanism (120) is used to wind up the pole roll (90) that has completed the marking.

18. The laser scribing device according to claim 17, characterized in that: The number of the laser scribing devices (140) is two; the two laser scribing devices (140) are arranged at intervals on the conveying path of the pole roll; A plurality of laser scribing assemblies of one of the laser scribing devices (140) form a plurality of first scribing lines on the pole roll (90), and a plurality of laser scribing assemblies of another laser scribing device (140) form a second scribing line on the pole roll (90); Any one of the first scribe lines is located between two adjacent second scribe lines.

19. The laser scribing device according to claim 18, characterized in that: The two laser scribing devices are respectively located on both sides of the pole roll in the thickness direction.

20. A marking method for a laser marking device, characterized in that: The laser scribing device comprises an unwinding mechanism (100), a conveying mechanism (110), a rewinding mechanism (120), and two laser scribing devices (140); the two laser scribing devices (140) are arranged at intervals on a conveying path of the pole roll, and each of the laser scribing devices (140) comprises a plurality of laser scribing assemblies (130), and the plurality of laser scribing assemblies (130) are arranged at intervals perpendicular to the conveying path of the pole roll; The marking method comprises: Installing the pole coil to the unwinding mechanism, the unwinding mechanism is used to unwind the pole coil; The pole roll unwound by the unwinding mechanism is transferred to one of the laser scribing devices by the conveying mechanism; the laser scribing device forms a plurality of first scribing lines on the pole roll; The pole roll formed with a plurality of the first scribe lines is continuously transferred to another laser scribing device through the conveying mechanism; the laser scribing device forms a plurality of second scribe lines on the pole roll; any one of the second scribe lines is located between two adjacent first scribe lines; The pole roll having a plurality of the first marking lines and a plurality of the second marking lines is continuously formed through the conveying mechanism and is transmitted to the winding mechanism; the winding mechanism is used to wind up the pole roll having completed the marking lines.

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