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

Abstract

A laser scribing assembly, comprising a housing (10), a plurality of light-emitting members (20), and a plurality of optical path assemblies (30). The plurality of light-emitting elements are arranged in the housing at intervals and are used for generating laser beams; the plurality of optical path assemblies are arranged in the housing and are arranged in one-to-one correspondence with the plurality of light-emitting elements; each optical path assembly is located on a transmission path of the laser beam generated by the corresponding light-emitting element; each optical path assembly comprises a collimating element (31) and a focusing element (32); and the laser beams emitted from the light-emitting elements pass through the corresponding collimating elements and are transmitted to the outside of the housing by means of the corresponding focusing elements. The laser scribing assembly can improve the depth consistency of a plurality of scribing lines, thereby improving the performance of products prepared by a laser scribing apparatus. The present application also relates to a laser scribing apparatus, a laser scribing device, and a scribing method.

Description

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

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202411330692.6, filed on September 23, 2024, and entitled "Laser scribing assembly, laser scribing device, laser scribing equipment and scribing method", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to, but is not limited 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

[0004] With the continuous development of the electronic industry, portable consumer electronic products have more and more functions and are more and more perfect and powerful, especially the emergence of smart phones, tablet computers and wearable devices, which have powerful functions and numerous components, and thus have a large demand for power and frequent charging and discharging. Therefore, the energy density, cycle life and safety performance of the randomly matched battery are required to be higher and higher.

[0005] In related technologies, in high-energy-density batteries, the thickness of the electrode sheet is generally thick, and the compaction density of the material is large, which has a large resistance to the infiltration of the electrolyte. It is usually necessary to use a laser scribing assembly to perform scribing on the surface of the negative electrode sheet to form a plurality of scribing lines with equal intervals and a certain depth. In this way, the transmission efficiency of lithium ions can be improved, and the battery capacity storage rate can be improved.

[0006] However, the energy of the plurality of laser beams formed by the laser scribing assembly is not uniform, which further leads to poor depth consistency of the plurality of scribing lines. SUMMARY

[0007] The purpose of the present application is to provide a laser scribing assembly, a laser scribing device, a laser scribing equipment and a scribing method, which can ensure the uniform energy distribution of the plurality of laser beams and further ensure the depth consistency of the plurality of scribing lines.

[0008] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions:

[0009] In a first aspect, the present application discloses a laser scribing assembly, comprising:

[0010] a housing;

[0011] a plurality of light emitting pieces, the plurality of light emitting pieces are arranged at intervals in the housing and used for generating laser beams;

[0012] A plurality of light path components are arranged in the shell and correspond to the plurality of light emitting elements one by one; each of the light path components is located on the transmission path of the laser beam generated by the corresponding light emitting element; wherein each of the light path components comprises a collimating element and a focusing element;

[0013] Each of the laser beams emitted by the light emitting elements passes through the corresponding collimating element and is transmitted to the outside of the shell via the corresponding focusing element.

[0014] As an optional implementation, at least one of the plurality of light emitting elements and the plurality of collimating elements is arranged in a stepped manner in the shell, and the corresponding light emitting element and the collimating element are located on the same plane.

[0015] As an optional implementation, the plurality of light emitting elements and the plurality of collimating elements are arranged in a stepped manner in the shell.

[0016] The corresponding light emitting element and the collimating element constitute an optical component group, and the distances between the light emitting elements and the collimating elements in all the optical component groups are equal.

[0017] As an optional implementation, the plurality of collimating elements are split components, and / or the plurality of focusing elements are mutually independent split components.

[0018] As an optional implementation, the laser scribing assembly further comprises a first support and a second support, the first support and the second support are arranged in the shell in a spaced manner, and the first support is located on the side of the second support facing the light emitting element; the light transmittance of the second support is greater than its refractive index.

[0019] The plurality of light emitting elements are arranged in a stepped manner on the first support, and the plurality of collimating elements are arranged in a stepped manner on the second support.

[0020] As an optional implementation, the first support is provided with a plurality of first stepped surfaces, and each of the first stepped surfaces is provided with one light emitting element;

[0021] The second support is provided with a plurality of second stepped surfaces, and each of the second stepped surfaces is provided with one collimating element;

[0022] The plurality of first stepped surfaces and the plurality of second stepped surfaces correspondingly flush.

[0023] As an optional implementation, the arrangement direction of the plurality of first stepped surfaces and the arrangement direction of the plurality of second stepped surfaces are parallel or intersected with each other.

[0024] As an optional implementation, the plurality of light emitting members and the plurality of collimating members are arranged in the housing.

[0025] The plurality of focusing members are arranged on the housing and located on the side of the collimating members away from the light emitting members.

[0026] As an optional implementation, the housing comprises a bottom plate, a side plate and a cover member, the side plate is arranged on one side of the bottom plate and enclosed with the bottom plate to form a containing cavity with an opening; the cover member covers the opening;

[0027] The plurality of light emitting members and the plurality of collimating members are arranged in the containing cavity; and the plurality of focusing members are arranged on the cover member.

[0028] As an optional implementation, the plurality of focusing members are integrated with the cover member.

[0029] As an optional implementation, the laser scribing device further comprises a cooling member arranged on the housing.

[0030] In a second aspect, the present application discloses a laser scribing device comprising at least one laser scribing assembly as described in the first aspect.

[0031] As an optional implementation, the laser scribing device further comprises a dust removing member arranged on one side of the housing and located on the transmission path of the laser beam transmitted out of the housing via the focusing member;

[0032] The dust removing member is used to clean the impurities generated by the laser scribing assembly during the scribing process.

[0033] As an optional implementation, the laser scribing device further comprises a filtering member arranged on one side of the housing and located on the transmission path of the laser beam transmitted out of the housing via the focusing member;

[0034] The filtering member is used to filter the impurities carried in the laser beam.

[0035] As an optional implementation, the laser scribing device further comprises at least one power supply member, and at least one of the power supply members is electrically connected with at least one of the laser scribing assemblies.

[0036] As an optional implementation, the number of the power supply members and the number of the laser scribing assemblies are both pluralities.

[0037] The number of the power supply members is less than the number of the laser scribing assemblies; each of the power supply members is electrically connected with a part of the laser scribing assemblies.

[0038] Alternatively, the number of the power supply members is equal to the number of the laser scribing assemblies, and each of the power supply members is electrically connected to a corresponding laser scribing assembly.

[0039] In a third aspect, the present application discloses a laser scribing device, comprising: an unwinding mechanism, a conveying mechanism, a winding mechanism, and the laser scribing device of the second aspect; the laser scribing device comprises a plurality of laser scribing assemblies;

[0040] The unwinding mechanism and the winding mechanism are arranged at intervals, and the unwinding mechanism is used for unwinding the polar roll;

[0041] The conveying mechanism is arranged between the unwinding mechanism and the winding mechanism, and is used for conveying the polar roll;

[0042] The laser scribing device is arranged on one side of the conveying path of the polar roll; wherein the plurality of laser scribing assemblies are arranged at intervals perpendicular to the conveying path of the polar roll to scribe the polar roll;

[0043] The winding mechanism is used for winding the polar roll after scribing.

[0044] As an optional 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 polar roll;

[0045] The plurality of laser scribing assemblies of one of the laser scribing devices form a plurality of first scribe lines on the polar roll, and the plurality of laser scribing assemblies of the other laser scribing device form a plurality of second scribe lines on the polar roll;

[0046] Any one of the first scribe lines is located between two adjacent second scribe lines.

[0047] As an optional implementation, the two laser scribing devices are respectively located on two sides of the polar roll in the thickness direction.

[0048] In a fourth aspect, the present application discloses a scribing method of a laser scribing device, wherein the laser scribing device comprises an unwinding mechanism, a conveying mechanism, a winding mechanism, and two laser scribing devices; the two laser scribing devices are arranged at intervals on the conveying path of the polar roll, and each of the laser scribing devices comprises a plurality of laser scribing assemblies, and the plurality of laser scribing assemblies are arranged at intervals perpendicular to the conveying path of the polar roll;

[0049] The scribing method comprises:

[0050] The polar roll is installed to the unwinding mechanism, and the unwinding mechanism is used for unwinding the polar roll;

[0051] The polar roll unwound by the unwinding mechanism is transmitted to one of the laser scribing devices by the conveying mechanism; the laser scribing device forms a plurality of first scribe lines on the polar roll;

[0052] The polar roll with the plurality of first scribe lines is continuously transmitted to another laser scribing device by the conveying mechanism; the laser scribing device forms a plurality of second scribe lines on the polar roll; any one of the second scribe lines is located between two adjacent first scribe lines;

[0053] The polar roll with the plurality of first scribe lines and the plurality of second scribe lines is continuously transmitted to the winding mechanism by the conveying mechanism; the winding mechanism is used for winding the polar roll with completed scribe lines.

[0054] In the laser scribing assembly, the laser scribing device, the laser scribing equipment and the scribing method provided by the embodiments of the present application, the laser scribing assembly comprises a shell, a plurality of light emitting pieces and a plurality of light path assemblies. The laser beams emitted by each light emitting piece are collimated and focused by the corresponding light path assemblies in sequence to form a laser beam. In this way, each light emitting piece and light path assembly can be controlled individually, which helps to ensure that the energy distribution of the multiple laser beams is consistent and avoid that some laser beams are too strong or too weak to form stable laser beam output. BRIEF DESCRIPTION OF DRAWINGS

[0055] The drawings in the specification are some embodiments of the present application. Those skilled in the art can obtain other drawings from these drawings without creative labor.

[0056] FIG. 1 is a structural schematic diagram of a laser scribing assembly provided by an embodiment of the present application;

[0057] FIG. 2 is an internal schematic diagram of a laser scribing assembly provided by an embodiment of the present application;

[0058] FIG. 3 is a partial schematic diagram of a laser scribing assembly provided by an embodiment of the present application;

[0059] FIG. 4 is a schematic diagram of a laser scribing assembly and a polar roll provided by an embodiment of the present application;

[0060] FIG. 5 is a structural schematic diagram of a laser scribing device provided by an embodiment of the present application;

[0061] FIG. 6 is a schematic diagram of a laser scribing equipment provided by an embodiment of the present application;

[0062] FIG. 7 is a schematic diagram of a laser scribing device and a polar roll provided by an embodiment of the present application.

[0063] Label explanation: 10: shell; 11: bottom plate; 12: side plate; 13: containing cavity; 14: second power supply end; 15: cover piece; 20: light emitting piece; 30: light path assembly; 31: collimating piece; 32: focusing piece; 40: first support piece; 41: first step surface; 50: second support piece; 51: second step surface; 61: dust removal piece; 62: filtering piece; 70: cooling piece; 80: electric control box; 90: pole roll; 100: unwinding mechanism; 110: conveying mechanism; 120: winding mechanism; 130: laser scribing assembly; 140: laser scribing device; 150: laser scribing equipment. DETAILED DESCRIPTION

[0064] As described in the background, there is a technical problem of poor depth consistency of multiple scribe lines formed by the laser scribing device in the related art. The inventor found that the reason for this problem is that the laser scribing device in the related art usually includes a light emitting piece for emitting a laser beam and a galvanometer system. The galvanometer system usually includes multiple galvanometers and at least one drive motor. In use, the at least one drive motor drives the galvanometer to rotate, thereby changing the reflection direction of the laser beam. However, within the amplitude width range of the galvanometer, the amplitude surface far away from the center of the laser beam receives a large-energy small spot, and the amplitude surface close to the center of the laser beam receives a small-energy large spot, thereby causing uneven energy distribution of the laser beam.

[0065] To solve the above technical problem, the laser scribing assembly, the laser scribing device, the laser scribing equipment and the scribing method provided by the embodiments of the present application are provided. The laser scribing assembly includes a shell, multiple light emitting pieces and multiple light path assemblies. Each light emitting piece emits a laser beam which is collimated and focused by the corresponding light path assembly in turn to form a laser beam. In this way, each light emitting piece and light path assembly can be controlled individually, which helps to ensure consistent energy distribution of multiple laser beams and avoid some laser beams being too strong or too weak to form stable laser beam output.

[0066] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0067] The embodiments of the present application provide a laser scribing assembly for generating a laser beam to form a scribe line on a to-be-processed component. The to-be-processed component can be a pole piece of a battery, a printed circuit board (PCB) or other flexible pieces.

[0068] Please refer to FIG. 1, FIG. 2 and FIG. 3, the laser scribing assembly 130 comprises a housing 10. The housing 10 is used as a main bearing part of the laser scribing assembly 130, and is used to provide bearing for other parts of the laser scribing assembly 130; or the housing 10 can also be used as a connecting part of the laser scribing assembly 130, so as to facilitate the installation of the laser scribing assembly 130 into the laser scribing device 150, for example, the housing 10 is fixedly connected with other parts of the laser scribing device 150.

[0069] It should be noted that in order to facilitate the installation of the remaining at least part of the laser scribing assembly 130 except the housing 10 into the housing 10, therefore, the housing 10 at least comprises a containing cavity 13 with an opening, so that the remaining at least part of the laser scribing assembly 130 except the housing 10 can be installed into the containing cavity 13 through the opening. The housing 10 can be a whole piece or a split piece. For example, please continue to refer to FIG. 1 and FIG. 2, the housing 10 comprises 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 the containing cavity 13 with the opening. In this way, the other parts of the laser scribing assembly 130, such as the light emitting part 20 and the light path assembly 30, can be installed into the containing cavity 13 through the opening, thereby improving the installation convenience of the other parts of the laser scribing assembly 130.

[0070] It should be noted that the shape of the housing 10 can be variously selected, for example, the shape of the housing 10 can be cylindrical or square; for example, the shape of the housing 10 can be irregular, which is not limited in the embodiment.

[0071] The material of the housing 10 can be metal. For example, the material of the housing 10 is copper, which has good heat dissipation performance, can quickly and effectively conduct the heat generated by the light emitting part 20 and other heat sources to the external environment, helps to keep the temperature in the housing 10 stable, prevents overheating, thereby prolongs the service life of the laser scribing assembly 130 and improves its reliability.

[0072] Please continue to refer to FIG. 2 and FIG. 3, the laser scribing assembly 130 further comprises a plurality of light emitting pieces 20 which are spaced apart in the housing 10. Each light emitting piece 20 generates a high-energy-density laser beam by exciting a laser medium. The laser medium is the core material for generating laser. The laser medium can include gas, liquid, solid or semiconductor. Exemplarily, the light emitting piece 20 is a semiconductor laser, i.e., the material capable of generating laser is a semiconductor material. When the laser scribing device is applied to the field of battery, for example, when the laser scribing device is used to scribe the pole piece, a small-power semiconductor material can be used as the light emitting piece 20 with laser medium to etch the pole piece, so that the adhesive on the surface of the pole piece is carbonized to lose adhesion, and the spot energy threshold of the laser beam is not enough to gasify the composition of the adhesive, so that no smoke-like dust, plasma or sputtering adhesive is generated, thus avoiding the risk of light blocking and dust accumulation, and ensuring the consistency of scribing depth. In addition, the adhesive that has lost adhesion can be easily removed by a brush and ultrasonic dust removal in the subsequent process, thereby ensuring the quality of the pole piece.

[0073] It should be noted that the number of light emitting pieces 20 can be freely set according to actual needs. Exemplarily, the number of light emitting pieces 20 is seven.

[0074] The laser scribing assembly 130 further comprises a plurality of light path assemblies 30 which are arranged in the housing 10 and correspond to the plurality of light emitting pieces 20 one by one, i.e., one light path assembly 30 corresponds to one light emitting piece 20. Each light path assembly 30 is located on the transmission path of the laser beam generated by the corresponding light emitting piece 20.

[0075] The light path assembly 30 comprises a collimating piece 31 and a focusing piece 32. The collimating piece 31 is used to collimate the laser beam, i.e., the divergent light beam can be converted into a parallel light beam to reduce the divergence angle of the laser beam and improve the quality and stability of the laser beam. The collimating piece 31 is usually composed of a lens, a mirror or other optical elements. The focusing piece 32 can focus the laser beam that has passed through the collimating piece 31 so that the laser beam is focused to a point or a specific area. The focusing piece 32 is usually composed of a lens, a mirror or other optical elements.

[0076] In the present embodiment, the plurality of collimating pieces 31 are independent parts, and / or the plurality of focusing pieces 32 are independent parts. On the one hand, the most suitable collimating piece 31 and focusing piece 32 can be selected according to different application scenarios to achieve the best beam collimation and focusing effect, thereby improving the overall performance of the laser scribing assembly 130. On the other hand, when any collimating piece 31 and / or focusing piece 32 fails, the failed collimating piece 31 and / or focusing piece 32 can be replaced individually, which can simplify the maintenance process of the laser scribing assembly 130 and reduce the maintenance cost.

[0077] It should be noted that the collimating member 31 and the focusing member 32 are arranged in the housing 10, which can be understood as being arranged entirely in the housing 10, or the collimating member 31 is arranged in the housing 10 and the focusing member 32 is arranged on the housing 10. The specific arrangement needs to be freely arranged according to the actual situation.

[0078] Exemplarily, the plurality of light emitting members 20 and the plurality of collimating members 31 are arranged in the housing 10; the plurality of focusing members 32 are arranged on the housing 10 and located on the side of the collimating member 31 away from the light emitting member 20. For example, the housing 10 can further include a cover member 15 connected with the housing 10 and covering the opening. The plurality of focusing members 32 are arranged on the cover member 15. In this embodiment, the cover member 15 covers the opening of the housing 10, so that the housing 10 forms a complete whole, avoiding the light emitting member 20 arranged in the housing 10 from being eroded by external impurities or water vapor, and improving the safety and service life of the light emitting member 20.

[0079] In addition, the cover member 15 and the plurality of focusing members 32 can also be an integral part, which can be formed by injection molding and stamping process. In this way, on the one hand, the structural stability of the cover member 15 and the plurality of focusing members 32 can be enhanced, reducing the vibration and displacement that may occur in the laser processing process, and improving the stability and processing precision of the laser scribing assembly 130; on the other hand, the injection molding and stamping process can realize high-precision manufacturing, ensuring that the size and shape of the plurality of focusing members 32 are accurate and consistent, thereby improving the focusing precision of the laser beam.

[0080] In other embodiments, the cover member 15 is not only arranged at the opening of the housing 10, but also arranged 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 formed multiple laser beams.

[0081] In this embodiment, one light path assembly 30 corresponds to one light emitting member 20, so that each laser beam emitted by the light emitting member 20 passes through the corresponding collimating member 31 and is transmitted to the outside of the housing 10 through the corresponding focusing member 32. Multiple independent laser beams can be emitted by the plurality of light emitting members 20, and each laser beam forms a laser beam meeting the requirements after passing through the corresponding light path assembly 30. In this way, each light emitting member 20 and light path assembly 30 can be controlled individually, which helps to ensure that the energy distribution of the multiple laser beams is consistent, avoiding that some laser beams are too strong or too weak, so as to form stable laser beam output, thereby ensuring the depth consistency of the multiple lines, and improving the performance of the prepared product of the laser scribing device.

[0082] In addition, the laser scribing assembly 130 of the present application relies on the cooperation of the light emitting element 20 and the light path assembly 30 to achieve the requirement of multiple laser beams. Compared with the related art, the layout of the combiner, jumper and isolator can be cancelled, so that the structure of the laser scribing assembly 130 is simpler and the manufacturing cost is lower.

[0083] It should be understood that the layout of the plurality of light emitting elements 20 and the plurality of collimating elements 31 can be designed according to the actual requirement of the laser beam. In one possible example, at least one of the plurality of light emitting elements 20 and the plurality of collimating elements 31 is arranged in a stepped manner in the housing, and the corresponding light emitting element 20 and collimating element 31 are located in the same plane. In one example, one of the plurality of light emitting elements 20 and the plurality of collimating elements 31 is arranged in a stepped manner in the housing 10. For example, the plurality of light emitting elements 20 is arranged in a stepped manner in the housing 10. That is, the projection of the plurality of light emitting elements 20 on the bottom plate 11 is arranged in a staggered manner, and the projection on the side plate 12 is arranged in a staggered manner. Or, for example, in the orientation shown in FIG. 2, the plurality of light emitting elements 20 is arranged in a staggered manner in the up-down orientation and the left-right orientation.

[0084] 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.

[0085] The housing 10 with the plurality of light emitting elements 20 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, avoiding interference between adjacent laser beams, ensuring the independence of each laser beam, and thereby 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 plurality of collimating elements 31 are also arranged in a stepped manner in the housing 10, interference between adjacent laser beams can also be avoided, improving the quality and stability of each laser beam.

[0086] The present embodiment also simplifies the alignment process of the optical devices in the laser scribing assembly 130 by arranging the light emitting element 20 and the collimating element 31 in the same plane, for example, the line connecting the corresponding light emitting element 20 and collimating element 31 is perpendicular to the bottom plate 11. In this way, the parameters that need to be adjusted during installation and debugging can be reduced, and the complexity and debugging difficulty of the laser scribing assembly 130 can be reduced. In addition, the corresponding light emitting element 20 and collimating element 31 located in the same plane can optimize the space layout, reduce the waste of space, and improve the overall efficiency of the laser scribing assembly 130.

[0087] As an optional implementation, the plurality of light emitting pieces 20 and the plurality of collimating pieces 31 are arranged in a stepped manner in the shell 10; the corresponding light emitting piece 20 and collimating piece 31 constitute an optical component group, or the light emitting piece 20 and collimating piece 31 located in the same plane constitute an optical component group.

[0088] The distance between the light emitting piece 20 and the collimating piece 31 in all optical component groups is equal. In this way, the optical path length of each optical component group is consistent, which helps to ensure that the optical performance of each optical component group is consistent, thereby improving the optical output quality and stability of the entire laser scribing assembly 130.

[0089] It should be noted that the light emitting piece 20 and the collimating piece 31 can be connected to the shell 10 through a connecting piece. Illustratively, the laser scribing assembly 130 further comprises a first support 40 and a second support 50, the first support 40 and the second support 50 are arranged in the shell 10 in a spaced manner, and the first support 40 is located on the side of the second support 50 facing the light emitting piece 20; that is, the first support 40 is located between the second support 50 and the light emitting piece 20. It should be noted that the first support 40 and the shell 10 can be an integral structure, for example, the first support 40 and the shell 10 are prepared by a casting process, which can improve the structural strength of the shell 10 and the first support 40. The first support 40 and the shell 10 can also be a separate structure, for example, the first support 40 is fixedly connected to the shell 10 by a welding process, and the size of the first support 40 can be reasonably set according to actual needs.

[0090] The light transmittance of the second support 50 is greater than its refractive index, or in other words, the second support 50 avoids hindering the transmission of the laser beam. Illustratively, the material of the second support 50 can include light-transmitting glass, which can be changed to make the second support 50 capable of transmitting laser beams with a wavelength of 976 nm.

[0091] Please continue to refer to Figure 3, the plurality of light emitting pieces 20 are arranged in a stepped manner on the first support 40, and the plurality of collimating pieces 31 are arranged in a stepped manner on the second support 50. Through the arrangement of the first support 40 and the second support 50, it is beneficial to quickly install the plurality of light emitting pieces 20 and the plurality of collimating pieces 31 into the shell 10.

[0092] In order to facilitate the stepped distribution of the plurality of light emitting pieces 20 and the plurality of collimating pieces 31, the first support piece 40 in the embodiment is provided with a plurality of first stepped surfaces 41, and one light emitting piece 20 is arranged on each first stepped surface 41; the second support piece 50 is provided with a plurality of second stepped surfaces 51, and one collimating piece 31 is arranged on each second stepped surface 51; the plurality of first stepped surfaces 41 and the plurality of second stepped surfaces 51 correspondingly and are flush, so that the light emitting piece 20 and the collimating piece 31 corresponding to the light emitting piece 20 can be more accurately positioned, so that the light emitting piece 20 and the collimating piece 31 corresponding to the light emitting piece 20 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 130.

[0093] It should be understood that, under the premise that the plurality of first stepped surfaces 41 and the plurality of second stepped surfaces 51 correspondingly and are flush, the arrangement direction of the plurality of first stepped surfaces 41 and the arrangement direction of the plurality of second stepped surfaces 51 can have multiple choices.

[0094] Exemplarily, the arrangement direction of the plurality of first stepped surfaces 41 and the arrangement direction of the plurality of second stepped surfaces 51 are parallel to each other or intersect with each other. In order to more clearly describe the arrangement direction, it is not difficult to define that the vertical direction of the bottom plate 11 pointing to the opening (or the transmission direction of the laser beam) is the first direction, and the first direction can be the X direction in FIG. 2.

[0095] When the arrangement direction of the plurality of first stepped surfaces 41 and the arrangement direction of the plurality of second stepped surfaces 51 are parallel to each other, the arrangement direction can form an acute angle with the first direction, or form an obtuse angle with the first direction. In other words, when the arrangement direction forms an acute angle with the first direction, the height of the plurality of first stepped surfaces 41 and the plurality of second stepped surfaces 51 gradually decreases along the first direction and away from the bottom plate 11. When the arrangement direction forms an obtuse angle with the first direction, the height of the plurality of first stepped surfaces 41 and the plurality of second stepped surfaces 51 gradually increases along the first direction and away from the bottom plate 11.

[0096] When the arrangement direction of the plurality of first stepped surfaces 41 and the arrangement direction of the plurality of second stepped surfaces 51 intersect with each other, 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.

[0097] As an optional embodiment, the laser scribing assembly 130 further comprises a cooling piece 70, and the cooling piece 70 is arranged on the shell 10. Exemplarily, the cooling piece 70 is arranged on the side plate 12 of the shell 10 and opposite to the plurality of light emitting pieces 20. In this way, the heat generated by the light emitting piece 20 can be effectively dissipated, and the service life of the light emitting piece 20 can be prolonged and the working stability can be improved by dissipating heat in time.

[0098] The cooling member 70 can adopt various cooling schemes, such as air cooling, water cooling, or thermoelectric cooling, and the most suitable cooling mode is selected according to actual needs, providing flexible design and application selection.

[0099] In the present example, the size of the cooling member 70 is smaller than the size of the side plate 12 in the direction of the vertical bottom plate 11. The size of the cooling member 70 is reduced under the premise of ensuring that the cooling member 70 timely dissipates heat from the plurality of light emitting members 20, thereby reducing the production and operation costs of the cooling member 70.

[0100] Referring to FIG. 5, the present application also provides a laser scribing device, which comprises the laser scribing assembly described in any of the above embodiments. Therefore, the laser scribing device comprises the structure and advantages of the laser scribing assembly, and the present embodiment will not be described further.

[0101] The laser scribing device 140 comprises a dust removal member 61, which is arranged on one side of the housing 10 and 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 the impurities generated in the scribing process of the laser scribing assembly 130.

[0102] The dust removal member 61 can comprise a dust removal cover, a beam inlet, a beam outlet, and a dust removal fan. The beam inlet and the beam outlet are oppositely arranged on the dust removal cover and located on the transmission path of the laser beam; the dust removal fan is in communication with the inner cavity of the dust removal cover. Impurities can be generated during the scribing process of the laser beam on the roll, wherein the impurities can include debris or dust. The present embodiment can remove the debris and dust generated in the laser scribing process in real time through the arrangement of the dust removal member 61, thereby avoiding the interference and scattering of these impurities on the laser beam, ensuring the stability and accuracy of the laser beam, and improving the precision and consistency of the scribing. At the same time, the clean working environment also reduces the negative effects of impurities on the surface quality of scribing, such as scratches and stains, thereby improving the overall quality of the product.

[0103] In other embodiments, the laser scribing device 140 further comprises a filtering member 62, which is arranged on one side of the housing 10 and located on the transmission path of the laser beam transmitted to the outside of the housing 10 via the focusing member 32; the filtering member 62 is used to filter the impurities carried in the laser beam.

[0104] It should be noted that the type of the filtering member 62 can have various forms, for example, the dust removal member 61 can be an optical filter, a diffraction grating, or other structures.

[0105] The filter 62 is used to filter the impurities carried in the laser beam. For example, the "impurity light" can include but is not limited to unnecessary wavelengths, scattered light and other optical noise, etc. The above-mentioned impurity light can be filtered by the filter 62, which significantly improves the purity of the laser beam, so that the output laser beam is more single and stable.

[0106] The relative position of the filter 62 and the dust removal member 61 can be selected in various ways. In an example, the filter 62 can be arranged on the dust removal member 61, for example, the filter 62 can be arranged at the light beam inlet of the dust removal cover; for another example, the filter 62 can also be arranged inside the dust removal cover and located directly below the light beam inlet, in this way, the filter 62 can also filter the impurities such as dust and debris generated during the laser scribing process. In another example, the filter 62 can also be arranged on the side of the dust removal member 61 facing the laser scribing assembly 130, or in other words, the filter 62 is arranged above the dust removal member 61.

[0107] As an optional implementation, the laser scribing device 140 further comprises at least one power supply, and the at least one power supply is electrically connected with the at least one laser scribing assembly 130. In this embodiment, the laser scribing assembly 130 comprises a plurality of; the power supply comprises a plurality of, and the power supply can supply power to one laser scribing assembly 130 or multiple laser scribing assemblies 130.

[0108] In an example, the number of power supplies is less than the number of laser scribing assemblies 130; each power supply is electrically connected with a part of the number of laser scribing assemblies 130. For example, each power supply can be used to supply power to five laser scribing assemblies 130, in this way, the number of power supplies can be reduced, the electrical design and wiring of the laser scribing assembly 130 can be simplified, and the complexity of electrical connection can be reduced, and the difficulty of installation and maintenance can be reduced. In addition, each power supply supplies power to multiple laser scribing assemblies 130, which can optimize the utilization rate of the power supply, improve the power supply efficiency, reduce the power loss, and improve the energy efficiency ratio of the laser scribing assembly 130.

[0109] 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 with the corresponding laser scribing assembly 130. That is, one power supply is electrically connected with the laser scribing assembly 130, so that the energy balance of the laser scribing assembly 130 can be ensured.

[0110] In this embodiment, the power supply comprises a first power supply end, and the housing 10 of the laser scribing assembly 130 is provided with a second power supply end 14, and the second power supply end 14 is electrically connected with the plurality of light emitting members 20 respectively; the first power supply end and the second power supply end 14 are electrically connected.

[0111] The embodiment supplies power to the plurality of light emitting elements 20 by the same power supply element. Since the power supply element can stably output current, the plurality of light emitting elements 20 can stably output energy. In combination with the fixed connection of the collimating element 31 and the focusing element 32, a stable spot diameter and energy are formed, thereby ensuring the consistency of the scribe line depth and width.

[0112] It should be noted that the power supply element can be a power supply circuit board, which is arranged in the electric control box 80. In addition, other controllers are also arranged in the electric control box.

[0113] Please refer to FIGS. 6 and 7, the embodiment of the present application further provides a laser scribing device which can scribe the pole roll 90 of the battery.

[0114] The laser scribing device 150 comprises a unwinding mechanism 100, a conveying mechanism 110, a winding mechanism 120, and the laser scribing device 140 described in the above embodiment. The unwinding mechanism 100 and the winding mechanism 120 are arranged at intervals, and the unwinding mechanism 100 is used for unwinding the pole roll 90.

[0115] The conveying mechanism 110 is arranged between the unwinding mechanism 100 and the winding mechanism 120, and is used for conveying the pole roll 90. The laser scribing device 140 is arranged on the conveying path of the pole roll 90. The plurality of laser scribing assemblies 130 of the laser scribing device 140 are arranged at intervals along the direction perpendicular to the conveying path of the pole roll 90, so as to scribe the pole roll 90.

[0116] In the embodiment, the conveying mechanism 110 is located downstream of the unwinding mechanism 100, and is used for conveying the pole roll 90 to the laser scribing device 140 for scribing operation. The winding mechanism 120 is used for winding the pole roll 90 after scribing. It should be noted that the unwinding mechanism 100, the conveying mechanism 110, and the winding mechanism 120 involved in the present embodiment are all prior art, and the specific structure can be referred to the description in the prior art, which will not be described here in detail.

[0117] It should be noted that the number of the laser scribing device 140 in the embodiment can be one or two. In the embodiment, the number of the laser scribing device 140 is two. The two laser scribing devices 140 are arranged at intervals between the unwinding mechanism 100 and the winding mechanism 120, or the two laser scribing devices 140 are arranged at intervals on the conveying path of the pole roll 90.

[0118] The plurality of laser scribing assemblies 130 of one of the laser scribing devices 140 form a plurality of first scribe lines on the pole roll 90, and the plurality of laser scribing assemblies 130 of the other laser scribing device 140 form second scribe lines on the pole roll 90. Any first scribe line is located between two adjacent second scribe lines.

[0119] The first laser scribing device 140 close to the unwinding mechanism 100 performs the first scribing operation on the polar roll, and the second laser scribing device 140 away from the unwinding mechanism 100 performs the second scribing operation on the polar roll. Through the two scribing operations, the scribing layout on the polar roll can be more complex and delicate. For example, the depth of the scribing lines and the spacing between adjacent scribing 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).

[0120] In some embodiments, the two laser scribing devices 140 are respectively located on both sides of the polar roll 90 in the thickness direction, so that the first scribing line and the second scribing line are located on the two surfaces of the polar roll 90 in the thickness direction. This can ensure that the processing effects of the two surfaces are consistent, thereby balancing the overall performance of the polar roll 90.

[0121] The embodiments of the present application also provide a scribing method of a laser scribing device, wherein the laser scribing device comprises an unwinding mechanism 100, a conveying mechanism 110, a winding mechanism 120, and two laser scribing devices 140; the two laser scribing devices 140 are spaced apart on the conveying path of the polar roll, and each laser scribing device 140 comprises a plurality of laser scribing assemblies 130, and the plurality of laser scribing assemblies 130 are spaced apart along a direction perpendicular to the conveying path of the polar roll.

[0122] The scribing method comprises:

[0123] installing the polar roll to the unwinding mechanism, wherein the unwinding mechanism is used for unwinding the polar roll;

[0124] transmitting the polar roll unwound by the unwinding mechanism to one of the laser scribing devices through the conveying mechanism; the laser scribing device forms a plurality of first scribing lines on the polar roll;

[0125] continuing to transmit the polar roll with the plurality of first scribing lines to the other laser scribing device through the conveying mechanism; the laser scribing device forms a plurality of second scribing lines on the polar roll; any one of the second scribing lines is located between two adjacent first scribing lines;

[0126] continuing to transmit the polar roll with the plurality of first scribing lines and the plurality of second scribing lines to the winding mechanism through the conveying mechanism; the winding mechanism is used for winding the polar roll with the completed scribing lines.

[0127] For the convenience of describing the laser scribing method of the laser scribing device in detail, the two laser scribing devices 140 are referred to as a first laser scribing device and a second laser scribing device, and the first laser scribing device is located between the unwinding mechanism 100 and the second laser scribing device. It should be understood that in FIG. 7, the laser scribing assemblies in the first row are used to represent the first laser scribing device, and the laser scribing assemblies in the second row are used to represent the second laser scribing device. FIG. 7 is only used to represent the arrangement and relative positions of the plurality of laser scribing assemblies of the first laser scribing device and the plurality of laser scribing assemblies of the second laser scribing device, and not the actual positions of the two laser scribing devices.

[0128] Correspondingly, the conveying mechanism 110 can be divided into a first conveying section, a second conveying section and a third conveying section. The first conveying section is used to convey the pole coil 90 to the first laser scribing device, the second conveying section is used to convey the pole coil 90 after the first scribing to the second laser scribing device, and the third conveying section is used to convey the pole coil 90 after the first and second scribing to the winding mechanism 120.

[0129] The scribing method of the laser scribing device includes the following steps:

[0130] The pole coil is unwound by the unwinding mechanism, and the pole coil is conveyed to below the first laser scribing device through the first conveying section and the flatness of the pole coil is ensured.

[0131] Then, the first laser scribing device stably outputs a laser beam to the moving pole coil, so as to form a plurality of first scribe lines on the A surface of the pole coil.

[0132] In this step, the light emitting part of the first laser scribing device can be started first, that is, the power supply part is started to provide electric energy for the light emitting part. The light emitting part is a semiconductor laser chip with a power of 1-50W.

[0133] The collimating part includes a collimating mirror with a focal length of 30-100mm and an effective distance after collimation of more than 500mm. The focusing mirror has a focal length of 30-200mm, a spot diameter after focusing of less than 100μm, and a thermal influence area of less than 250μm.

[0134] In actual use, the pole coil with a length of 30mm-100mm can be scribed. Specifically, the movement speed of the pole coil can be 10mm / s-100mm / s, and the movement speed of the pole coil depends on the energy of the light emitting part.

[0135] After the first scribing is completed, the second conveying section conveys the pole coil to below the second laser scribing device and ensures the flatness of the pole coil;

[0136] The second laser scribing device stably outputs a laser beam in motion, thereby forming a plurality of second scribe lines on the B surface of the polar roll. The distribution of the first scribe lines and the second scribe lines can refer to FIG. 7.

[0137] After the first scribe lines and the second scribe lines are formed, the third conveying section conveys the polar roll with the scribe lines to a winding mechanism, and the winding mechanism performs a winding operation on the polar roll with the scribe lines.

[0138] In the present example, the power supply directly supplies power to the plurality of light emitting elements in each laser scribing assembly 130, so that each light emitting element is directly powered and cooperates with the collimating mirror and the focusing mirror to form a micro high-energy light spot. The plurality of light emitting elements respectively emit a plurality of micro high-energy light spots, and the plurality of micro high-energy light spots act on the surface of the polar roll moving at a constant speed at equal intervals to form a plurality of scribe lines.

[0139] The embodiments or implementations in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0140] It should be noted that the terms "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. in the specification indicate that the described embodiment can include a particular feature, structure or characteristic, but not necessarily every embodiment. In addition, such terms do not necessarily refer to the same embodiment. In addition, when a particular feature, structure or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure or characteristic in connection with other embodiments, whether explicitly described or not.

[0141] The technical solutions of the present application are described for illustration, not limitation; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and such 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, comprising: a housing (10) ; a plurality of light emitting elements (20), the plurality of light emitting elements (20) being arranged in the housing (10) in a spaced apart manner for generating laser beams; a plurality of optical path assemblies (30), the plurality of optical path assemblies (30) being arranged in the housing (10) and corresponding to the plurality of light emitting elements (20) one by one; each of the optical path assemblies (30) is located on a transmission path of the laser beams generated by the corresponding light emitting element (20) ; wherein each of the optical path assemblies (30) comprises a collimating element (31) and a focusing element (32) ; each of the laser beams emitted by the light emitting element (20) passes through the corresponding collimating element (31) and is transmitted to the outside of the housing (10) through the corresponding focusing element (32). 2.The laser scribing assembly according to claim 1, at least one of the plurality of light emitting elements (20) and the plurality of collimating elements (31) is arranged in the housing (10) in a stepped manner, and the corresponding light emitting element (20) and the collimating element (31) are located on the same plane. 3.The laser scribing assembly according to claim 1 or 2, the plurality of light emitting elements (20) and the plurality of collimating elements (31) are arranged in the housing (10) in a stepped manner; the corresponding light emitting element (20) and the collimating element (31) form an optical component group, and the distances between the light emitting elements (20) and the collimating elements (31) in all the optical component groups are equal. 4.The laser scribing assembly according to any one of claims 1-3, the plurality of collimating elements (31) are independent sub-elements, and / or the plurality of focusing elements (32) are independent sub-elements. 5.The laser scribing assembly according to any one of claims 1-4, further comprising a first support element (40) and a second support element (50), the first support element (40) and the second support element (50) are arranged in the housing (10) in a spaced apart manner, and the first support element (40) is located on the side of the second support element (50) facing the light emitting element (20) ; the light transmittance of the second support element (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 any one of claims 1-5, the first support element (40) is provided with a plurality of first stepped surfaces (41), and each of the first stepped surfaces (41) is provided with one light emitting element (20) ; the second support element (50) is provided with a plurality of second stepped surfaces (51), and each of the second stepped surfaces (51) is provided with one collimating element (31) ; the plurality of first stepped surfaces (41) and the plurality of second stepped surfaces (51) correspondingly and are flush.

7. The laser scribing assembly according to any one of claims 1-6, wherein the first step surfaces (41) are arranged in a direction parallel to or intersecting the second step surfaces (51).

8. The laser scribing assembly according to any one of claims 1-7, wherein the light emitting elements (20) and the collimating elements (31) are arranged in the housing (10) in a spaced manner.

9. The laser scribing assembly according to any one of claims 1-8, wherein the housing (10) comprises a bottom plate (11), a side plate (12) arranged on one side of the bottom plate (11) and enclosing the bottom plate (11) to form a receiving cavity (13) with an opening, and a cover element (15) covering the opening.

10. The laser scribing assembly according to any one of claims 1-9, wherein the focusing elements (32) are integrated with the cover element (15).

11. The laser scribing assembly according to any one of claims 1-10, further comprising a cooling element (70) arranged on the housing.

12. A laser scribing device comprising at least one laser scribing assembly according to any one of claims 1-11.

13. The laser scribing device according to claim 12, further comprising a dust removing element (61) arranged on one side of the housing (10) of the laser scribing assembly and located on the transmission path of the laser beam transmitted out of the housing (10) via the focusing elements (32) of the laser scribing assembly.

14. The laser scribing device according to claim 12 or 13, further comprising a filtering element (62) arranged on one side of the housing (10) and located on the transmission path of the laser beam transmitted out of the housing (10) via the focusing elements (32).

15. The laser scribing device according to any one of claims 12-14, further comprising at least one power supply element, wherein the at least one power supply element is electrically connected to the at least one laser scribing assembly.

16. The laser scribing device according to any one of claims 12-15, wherein the number of the power supply elements is less than the number of the laser scribing assemblies, and each of the power supply elements is electrically connected to a part of the laser scribing assemblies. ​ ​ ​ ​ ​ Alternatively, the number of power supply components is equal to the number of laser scribing assemblies, and each power supply component is electrically connected to a corresponding laser scribing assembly.

17. A laser scribing device, comprising an unwinding mechanism (100), a conveying mechanism (110), a winding mechanism (120), and the laser scribing apparatus (140) of any one of claims 12-16; the laser scribing apparatus (140) comprises a plurality of laser scribing assemblies (130); The unwinding mechanism (100) and the winding mechanism (120) are arranged at intervals, and the unwinding mechanism (100) is used to unwind the pole roll (90); The conveying mechanism (110) is arranged between the unwinding mechanism (100) and the winding mechanism (120) and is used to convey the pole roll (90); The laser scribing device (140) is arranged at one side of a conveying path of the pole piece roll (90); wherein, A plurality of laser scribing assemblies (130) are arranged at intervals along a direction perpendicular to the conveying path of the pole roll (90) to scribe the pole roll (90); The winding mechanism (120) is used to wind the pole roll (90) after scribing.

18. The laser scribing device of claim 17, wherein the number of laser scribing apparatuses (140) is two; two laser scribing apparatuses (140) are arranged at intervals along the conveying path of the pole roll; The laser scribing assemblies (130) of one of the laser scribing apparatuses (140) form a plurality of first scribe lines on the pole roll (90), and the laser scribing assemblies (130) of the other laser scribing apparatus (140) form a plurality of second scribe lines 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 of claim 17 or 18, wherein the two laser scribing apparatuses are respectively located on two sides of the pole roll in the thickness direction.

20. A scribing method of a laser scribing device, the laser scribing device comprising an unwinding mechanism (100), a conveying mechanism (110), a winding mechanism (120), and two laser scribing apparatuses (140); the two laser scribing apparatuses (140) are arranged at intervals along the conveying path of the pole roll, and each laser scribing apparatus (140) comprises a plurality of laser scribing assemblies (130) arranged at intervals along a direction perpendicular to the conveying path of the pole roll; The scribing method comprises: mounting the pole roll to the unwinding mechanism, which is used to unwind the pole roll; transmitting the pole roll unwound by the unwinding mechanism to one of the laser scribing apparatuses by the conveying mechanism; the laser scribing apparatus forms a plurality of first scribe lines on the pole roll; continuing to transmit the pole roll with the plurality of first scribe lines to the other laser scribing apparatus by the conveying mechanism; the laser scribing apparatus 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. Continuing to transport the pole winding formed with the plurality of first scribe lines and the plurality of second scribe lines to the winding mechanism by the conveying mechanism; the winding mechanism is used for winding the pole winding completed with scribe lines.

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