Laser etching device

Abstract

This application discloses a laser etching apparatus, including a conveying assembly, a first laser head, and a second laser head. The conveying assembly includes a first roller and a second roller, which are spaced apart. The first roller is used to wind and support a material strip, and the second roller is used to wind the material strip that has been wound from the first roller and support the material strip. The first laser head is used to emit a first laser beam, which is used to etch a first sub-groove on the material strip supported by the first roller. The second laser head is located on the same side of the material strip as the first laser head. The second laser head is used to emit a second laser beam, which is used to etch a second sub-groove on the material strip supported by the second roller. The second sub-groove is used to connect with the first sub-groove to form a complete groove. The laser etching apparatus of this application can effectively improve the efficiency of etching grooves on electrodes.

Description

Technical Field

[0001] This application relates to the field of lithium battery electrode etching technology, and in particular to the design of a laser etching device. Background Technology

[0002] Fast charging technology for lithium batteries is becoming one of the core research directions in the fields of new energy, electric vehicles, and consumer electronics. Significantly reducing charging time while ensuring safety and battery life is a crucial direction for the future development of lithium batteries.

[0003] Traditional graphite anodes for lithium ions exhibit slow diffusion rates. Under high-rate charge-discharge conditions, lithium-ion batteries using graphite anodes experience rapid capacity decay and suffer from insufficient electrolyte ionic conductivity and lithium-ion transference number. Currently, laser etching of grooves on lithium-ion battery electrodes can improve the storage capacity of the raw materials and increase the diffusion rate of ions, thereby shortening the charging time of lithium-ion batteries.

[0004] In related technologies, laser heads used for etching lithium battery electrodes are arranged in a row along the width of the electrode to etch multiple grooves on it. However, this arrangement of laser heads is difficult to adapt to electrodes with high transport speeds, resulting in low efficiency in etching grooves on the electrode. Utility Model Content

[0005] Therefore, this application proposes a laser etching apparatus that can effectively improve the efficiency of etching grooves on the electrode.

[0006] A laser etching apparatus according to a first aspect embodiment of this application includes:

[0007] A conveying assembly includes a first roller and a second roller, which are spaced apart. The first roller is used to wind and support a material belt, and the second roller is used to wind the material belt that has been wound from the first roller and support the material belt.

[0008] A first laser head is used to emit a first laser, which is used to etch a first sub-groove on the strip supported by the first roller;

[0009] The second laser head is located on the same side of the material strip as the first laser head; the second laser head is used to emit a second laser, which is used to etch a second sub-groove on the material strip supported by the second roller; the second sub-groove is used to connect with the first sub-groove to form a complete groove.

[0010] The laser etching apparatus according to the embodiments of this application has at least the following beneficial effects: the first laser head and the second laser head successively process the first sub-groove and the second sub-groove on the electrode (a type of material strip), and the second sub-groove is connected with the first sub-groove to form a complete groove; even when the electrode conveying speed is increased, the complete groove can still be stably etched through the division of labor and cooperation between the first laser head and the second laser head, thereby effectively improving the efficiency of etching grooves on the electrode.

[0011] According to some embodiments of this application, the first laser head is provided with N1, where N1 is an integer and N1≥2. The N1 first laser heads are arranged at intervals along the axial direction of the first roller. The N1 first laser heads are used to etch N2 first sub-grooves on the material strip supported by the first roller, where N2 is an integer multiple of N1.

[0012] The number of second laser heads is equal to that of the first laser heads. N1 second laser heads are arranged at intervals along the axial direction of the second roller. The N1 second laser heads are used to etch N2 second sub-grooves on the material strip supported by the second roller. The N2 second sub-grooves are used to connect with the N2 first sub-grooves one by one to form N2 complete grooves.

[0013] According to some embodiments of this application, N1 takes the value of one of 2, 3, and 4.

[0014] According to some embodiments of this application, a first dust removal module is also included, the first dust removal module comprising:

[0015] The first dust cover is provided with a first receiving groove, which is used to accommodate at least a portion of the first roller so that the portion of the material strip supported by the first roller is located in the first receiving groove; the first dust cover is also provided with a first light inlet hole, which is used to allow the first laser to enter the first receiving groove.

[0016] The first dust extraction component has a first channel, one end of which is connected to the first receiving groove, and the other end of which is connected to the first negative pressure air source.

[0017] According to some embodiments of this application, the first inner surface of the first receiving groove includes a first arc surface, the first arc surface being used to surround at least a portion of the first roller.

[0018] According to some embodiments of this application, a second dust removal module is also included, the second dust removal module comprising:

[0019] The second dust cover is provided with a second receiving groove, which is used to accommodate at least a portion of the second roller so that the portion of the material strip supported by the second roller is located in the second receiving groove; the second dust cover is also provided with a second light inlet hole, which is used to allow the second laser to enter the second receiving groove;

[0020] The second dust extraction component has a second channel, one end of which is connected to the second receiving groove, and the other end of which is connected to the second negative pressure air source.

[0021] According to some embodiments of this application, the second inner surface of the second receiving groove includes a second arcuate surface for surrounding at least a portion of the second roller.

[0022] According to some embodiments of this application, the conveying assembly further includes:

[0023] A first tensioning roller is used to wind and support the strip, and a first roller is used to wind the strip that is wound from the first tensioning roller;

[0024] The first pressure roller is arranged side by side and at intervals with the first tensioning roller;

[0025] A first driving member is used to drive the first pressure roller closer to the first tension roller so that the first pressure roller presses against the material belt supported by the first tension roller; the first driving member is also used to drive the first pressure roller away from the first tension roller.

[0026] According to some embodiments of this application, the conveying assembly further includes:

[0027] The second tensioning roller is used to wind the strip that has come off the first roller and to support the strip; the second roller is used to wind the strip that has come off the second tensioning roller.

[0028] The second pressure roller is arranged side by side with a gap from the second tension roller;

[0029] The second driving member is used to drive the second pressure roller closer to the second tension roller so that the second pressure roller presses against the material belt supported by the second tension roller; the second driving member is also used to drive the second pressure roller away from the second tension roller.

[0030] According to some embodiments of this application, assuming the included angle between any two of the first direction, the second direction, and the third direction is greater than zero, the laser etching apparatus further includes:

[0031] A first driving component is used to drive the first laser head to move along a first direction. The first driving component is also used to drive the first laser head to move along a second direction and a third direction.

[0032] The second driving component is used to drive the second laser head to move along a first direction. The first driving component is also used to drive the second laser head to move along a second direction and a third direction.

[0033] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0034] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0035] Figure 1 This is a front view of a laser etching apparatus according to an embodiment of this application;

[0036] Figure 2 for Figure 1 A schematic diagram of the electrode sheet etched by the laser etching device;

[0037] Figure 3 for Figure 1 A three-dimensional view of the laser etching device in China;

[0038] Figure 4 for Figure 1 A three-dimensional view of the first dust removal module of the laser etching device.

[0039] Reference numerals: conveying assembly 100, first tensioning roller 110, first pressure roller 120, first drive component 130, first roller 140, second tensioning roller 150, second pressure roller 160, second drive component 170, second roller 180;

[0040] Material strip 200, electrode 210, groove 220, first sub-groove 221, second sub-groove 222;

[0041] First laser head 310, first laser 311, first driving component 320;

[0042] Second laser head 410, second laser 411, second drive assembly 420;

[0043] First dust removal module 500, first dust cover 510, first receiving groove 511, first light inlet hole 512, first arc surface 513, first inner surface 514, third drive assembly 520, first dust extraction component 530, first channel 531;

[0044] The second dust removal module 600, the second dust cover 610, the second receiving groove 611, the second light inlet 612, the second arc surface 613, the second inner surface 614, the fourth drive assembly 620, the second dust extraction component 630, and the second channel 631. Detailed Implementation

[0045] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0046] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, and "above," "below," "within," etc., are understood to exclude the stated number. If "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0048] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0049] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] It should be noted that the material strip 200 etched by the laser etching apparatus in the following embodiments of this application is an example of an electrode 210, but it is not limited to an electrode 210, and can also be a metal foil, an optical film, etc.

[0051] Reference Figure 1 and Figure 2 According to a first aspect embodiment of the present application, a laser etching apparatus includes a transport assembly 100, a first laser head 310, and a second laser head 410. The transport assembly 100 includes a first roller 140 and a second roller 180, which are spaced apart. The first roller 140 is used to wind and support an electrode 210, and the second roller 180 is used to wind the electrode 210 that has been wound from the first roller 140 and to support the electrode 210.

[0052] The first laser head 310 is used to emit a first laser 311, which is used to etch a first sub-groove 221 on the electrode 210 supported by the first roller 140 (see reference). Figure 2 The second laser head 410 is located on the same side of the electrode 210 as the first laser head 310. The second laser head 410 is used to emit a second laser 411, which is used to etch a second sub-groove 222 on the electrode 210 supported by the second roller 180 (see reference). Figure 2 The second sub-groove 222 is used to connect with the first sub-groove 221 to form a complete groove 220.

[0053] The laser etching apparatus according to the embodiments of this application has at least the following beneficial effects: the first laser head 310 and the second laser head 410 successively process the first sub-groove 221 and the second sub-groove 222 on the electrode 210. After the second sub-groove 222 is connected with the first sub-groove 221, a complete groove 220 can be formed. When the electrode conveying speed is increased, the complete groove 220 can still be stably etched through the division of labor between the first laser head 310 and the second laser head 410, which is conducive to effectively improving the efficiency of etching the groove 220 on the electrode.

[0054] Specifically, the first laser head 310 typically includes a laser, a galvanometer, and a field lens. The second laser head 410 is similar.

[0055] Reference Figure 3 In some embodiments of this application, N1 first laser heads 310 are provided, where N1 is an integer and N1≥2, and the N1 first laser heads 310 are arranged along the axial direction of the first roller 140 (refer to...). Figure 3 For example, the first roller 140 is arranged at intervals in the axial direction (front and back direction). N1 first laser heads 310 are used to etch N2 first sub-grooves 221 on the electrode 210 supported by the first roller 140, where N2 is an integer multiple of N1.

[0056] The number of second laser heads 410 is equal to that of the first laser heads 310, and N1 second laser heads 410 are arranged along the axial direction of the second roller 180 (refer to...). Figure 3 For example, the second roller 180 is arranged at intervals in the axial direction of the front and back direction. N1 second laser heads 410 are used to etch N2 second sub-grooves 222 on the electrode 210 supported by the second roller 180. The N2 second sub-grooves 222 are used to connect with the N2 first sub-grooves 221 in a one-to-one correspondence to form N2 complete grooves 220.

[0057] By setting up N1 first laser heads 310 and N1 second laser heads 410, the etching of N2 grooves 220 can be completed in one go, which helps to improve processing efficiency and meet the needs of mass production.

[0058] Specifically, N1 can take the value of 2, 3, 4 or other values, and N2 can take the value of 2, 3, 4, 5 or other values.

[0059] Reference Figure 3 In the improved version of the above embodiment, N1 takes the value of one of 2, 3 and 4.

[0060] When the number of the second laser head 410 and the first laser head 310 is 2, 3 or 4, the processing efficiency and equipment manufacturing cost can be balanced, and over-design can be avoided.

[0061] Reference Figure 1 and Figure 4 In some embodiments of this application, the laser etching apparatus further includes a first dust removal module 500, which includes a first dust cover 510 and a first dust extraction component 530. The first dust cover 510 is provided with a first receiving groove 511, which is used to receive at least a portion of the first roller 140, such that the portion of the electrode 210 supported by the first roller 140 is located within the first receiving groove 511.

[0062] The first dust cover 510 is also provided with a first light inlet 512, which is used to allow the first laser 311 to enter the first receiving groove 511. The first dust extraction component 530 is provided with a first channel 531, one end of which is connected to the first receiving groove 511, and the other end of which is connected to the first negative pressure air source.

[0063] By opening a first light-entry hole 512 on the first dust cover 510, when the part of the electrode 210 supported by the first roller 140 is located in the first receiving groove 511, the first laser 311 can also irradiate the electrode 210 to achieve etching of the first sub-groove 221.

[0064] The portion of electrode 210 supported by the first roller 140 is located within the first receiving groove 511. This confines the dust generated by laser etching within a small area to the first dust cover 510, reducing the probability of dust spreading into the environment. One end of the first channel 531 is connected to the first receiving groove 511, allowing for timely removal of dust from the first receiving groove 511, further reducing the probability of dust spilling into the environment and adhering to the electrode 210 and the first roller 140.

[0065] Specifically, the first negative pressure gas source can be generated by a vacuum pump or a jet-induced flow device.

[0066] It should be noted that, referring to Figure 4 The first dust removal module 500 typically also includes a third drive assembly 520, which drives the first dust cover 510 to move closer to or further away from the first roller 140. When the first dust cover 510 moves away from the first roller 140, it can pull the electrode 210 to wind around the first roller 140. When the first dust cover 510 moves closer to the first roller 140, the first dust cover 510 can operate normally.

[0067] Specifically, the third drive assembly 520 may be one of the following: a cylinder, a linear motor, a hydraulic cylinder, an electric cylinder, a motor-driven lead screw and nut mechanism, a motor-driven gear and rack mechanism, a motor-driven sprocket and chain mechanism, a motor-driven synchronous pulley and synchronous belt mechanism, and a motor-driven crank and slider mechanism. Preferably, the third drive assembly 520 is a cylinder.

[0068] Reference Figure 4 In the improved embodiment described above, the first inner surface 514 of the first receiving groove 511 includes a first arc surface 513, which is used to surround at least a portion of the first roller 140.

[0069] The first arc surface 513 is more compatible with the shape of the first roller 140. When the first arc surface 513 surrounds the first roller 140, the distance between the first arc surface 513 and the outer surface of the first roller 140 is smaller, and the probability of dust spilling into the environment from between the first arc surface 513 and the outer surface of the first roller 140 is lower, which helps to improve the dustproof effect.

[0070] Reference Figure 1 and Figure 4 In some embodiments of this application, the laser etching apparatus further includes a second dust removal module 600, which includes a second dust cover 610 and a second dust extraction component 630. The second dust cover 610 is provided with a second receiving groove 611, which is used to receive at least a portion of the second roller 180, such that the portion of the electrode 210 supported by the second roller 180 is located within the second receiving groove 611.

[0071] The second dust cover 610 is also provided with a second light inlet 612, which is used to allow the second laser 411 to enter the second receiving groove 611. The second dust extraction component 630 is provided with a second channel 631, one end of which is connected to the second receiving groove 611, and the other end of which is connected to the second negative pressure air source.

[0072] By opening a second light-entry hole 612 on the second dust cover 610, when the part of the electrode 210 supported by the second roller 180 is located in the second receiving groove 611, the second laser 411 can also irradiate the electrode 210 to achieve etching of the second sub-groove 222.

[0073] The portion of electrode 210 supported by the second roller 180 is located within the second receiving groove 611. This allows the dust generated during laser etching to be confined within a small area by the second dust cover 610, reducing the probability of dust spreading into the environment. One end of the second channel 631 is connected to the second receiving groove 611, thereby allowing for timely removal of dust from the second receiving groove 611, reducing the probability of dust spilling into the environment and adhering to the electrode 210 and the second roller 180.

[0074] Specifically, the second negative pressure gas source can be generated by a vacuum pump or a jet-induced flow device.

[0075] It should be noted that, referring to Figure 4 The second dust removal module 600 typically also includes a fourth drive assembly 620, which drives the second dust cover 610 toward or away from the second roller 180. When the second dust cover 610 moves away from the second roller 180, it can pull the electrode 210 around the second roller 180. When the second dust cover 610 moves toward the second roller 180, the second dust cover 610 can operate normally.

[0076] Specifically, the fourth drive assembly 620 may be one of the following: a cylinder, a linear motor, a hydraulic cylinder, an electric cylinder, a motor-driven lead screw and nut mechanism, a motor-driven gear and rack mechanism, a motor-driven sprocket and chain mechanism, a motor-driven synchronous pulley and synchronous belt mechanism, and a motor-driven crank and slider mechanism. Preferably, the fourth drive assembly 620 is a cylinder.

[0077] Reference Figure 4 In the improved embodiment described above, the second inner surface 614 of the second receiving groove 611 includes a second arc surface 613, which is used to surround at least a portion of the second roller 180.

[0078] The second arc surface 613 is more compatible with the shape of the second roller 180. When the second arc surface 613 surrounds the second roller 180, the gap between the second arc surface 613 and the outer surface of the second roller 180 is smaller, and the probability of dust spilling into the environment from between the second arc surface 613 and the outer surface of the second roller 180 is lower, which helps to improve the dustproof effect.

[0079] Reference Figure 1 In some embodiments of this application, the conveying assembly 100 further includes a first tensioning roller 110, a first pressure roller 120, and a first drive member 130. The first tensioning roller 110 is used to wind and support the electrode 210, and the first roller 140 is used to wind the electrode 210 that is wound from the first tensioning roller 110.

[0080] The first pressure roller 120 and the first tension roller 110 are arranged side by side and spaced apart. The first driving member 130 is used to drive the first pressure roller 120 closer to the first tension roller 110, so that the first pressure roller 120 presses the electrode 210 supported by the first tension roller 110. The first driving member 130 is also used to drive the first pressure roller 120 away from the first tension roller 110.

[0081] By tensioning the electrode 210 with the first tensioning roller 110, the electrode 210 can maintain tension, preventing it from slackening and thus ensuring the etching accuracy of the electrode 210. After the first pressure roller 120 presses the electrode 210 supported by the first tensioning roller 110, it can effectively reduce the probability of the electrode 210 shifting along its width direction, ensuring that the electrode 210 winds into the first roller 140 along a predetermined path.

[0082] After the first pressure roller 120 loosens the electrode 210 supported by the first tension roller 110, it facilitates the installation, replacement or maintenance of the electrode 210, thereby improving operational convenience.

[0083] Specifically, the first driving component 130 can be one of the following: a cylinder, a linear motor, a hydraulic cylinder, an electric cylinder, a motor-driven lead screw and nut mechanism, a motor-driven gear and rack mechanism, a motor-driven sprocket and chain mechanism, a motor-driven synchronous pulley and synchronous belt mechanism, and a motor-driven crank and slider mechanism. Preferably, the first driving component 130 is a cylinder.

[0084] Reference Figure 1 In the improved embodiment described above, the conveying assembly 100 further includes a second tensioning roller 150, a second pressure roller 160, and a second drive member 170. The second tensioning roller 150 is used to wind around the electrode sheet 210 that extends from the first roller 140 and to support the electrode sheet 210. The second roller 180 is used to wind around the electrode sheet 210 that extends from the second tensioning roller 150.

[0085] The second pressure roller 160 and the second tension roller 150 are arranged side by side and spaced apart. The second driving member 170 is used to drive the second pressure roller 160 closer to the second tension roller 150 so that the second pressure roller 160 presses the electrode plate 210 supported by the second tension roller 150; the second driving member 170 is also used to drive the second pressure roller 160 away from the second tension roller 150.

[0086] By tightening the electrode 210 with the second tensioning roller 150, the electrode 210 can be kept under tension, preventing it from slackening and thus helping to ensure the etching accuracy of the electrode 210. After the second pressure roller 160 presses the electrode 210 supported by the second tensioning roller 150, it can effectively reduce the probability of the electrode 210 shifting along its width direction, ensuring that the electrode 210 is wound into the second roller 180 along a predetermined path.

[0087] After the second pressure roller 160 loosens the electrode 210 supported by the second tension roller 150, it facilitates the installation, replacement or equipment maintenance of the electrode 210, thereby improving operational convenience.

[0088] Specifically, the second driving component 170 can be one of the following: a cylinder, a linear motor, a hydraulic cylinder, an electric cylinder, a motor-driven lead screw and nut mechanism, a motor-driven gear and rack mechanism, a motor-driven sprocket and chain mechanism, a motor-driven synchronous pulley and synchronous belt mechanism, and a motor-driven crank and slider mechanism. Preferably, the second driving component 170 is a cylinder.

[0089] Reference Figure 3 In some embodiments of this application, the included angle between any two of the first direction, the second direction, and the third direction is greater than zero. The laser etching apparatus further includes a first driving component 320 and a second driving component 420. The first driving component 320 is used to drive the first laser head 310 to move along the first direction, the first driving component 320 is also used to drive the first laser head 310 to move along the second direction, and the first driving component 320 is also used to drive the first laser head 310 to move along the third direction.

[0090] The second drive assembly 420 is used to drive the second laser head 410 to move along the first direction. The first drive assembly 320 is also used to drive the second laser head 410 to move along the second direction and the first drive assembly 320 is also used to drive the second laser head 410 to move along the third direction.

[0091] The first drive assembly 320 drives the first laser head 310 to move in three-dimensional space, and can adjust the spatial position of the first laser head 310, thereby compensating for the conveying deviation of the electrode 210, the installation error of the equipment, or the offset error of the laser, and improving the positional accuracy of the first sub-groove 221.

[0092] Similarly, the second drive assembly 420 drives the second laser head 410 to move in three-dimensional space, which can adjust the spatial position of the second laser head 410, thereby compensating for the conveying deviation of the electrode 210, the installation error of the equipment, or the offset error of the laser, and improving the positional accuracy of the second sub-groove 222.

[0093] Specifically, the angle between any two of the first direction, the second direction, and the third direction is 80 degrees, 85 degrees, 90 degrees, or other angles. Preferably, the angle between any two of the first direction, the second direction, and the third direction is 90 degrees. For example, the first direction is the left-right direction, the second direction is the up-down direction, and the third direction is the front-back direction.

[0094] Specifically, both the first drive assembly 320 and the second drive assembly 420 can be three-axis motion platforms. The specific structure of each axis of the three-axis motion platform can be one of the following: a cylinder, a linear motor, a hydraulic cylinder, an electric cylinder, a motor-driven lead screw and nut mechanism, a motor-driven gear and rack mechanism, a motor-driven sprocket and chain mechanism, a motor-driven synchronous pulley and synchronous belt mechanism, and a motor-driven crank-slider mechanism. Preferably, the specific structure of each axis of the three-axis motion platform is a motor-driven lead screw and nut mechanism.

[0095] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A laser engraving apparatus, characterized by, include: A conveying assembly includes a first roller and a second roller, which are spaced apart. The first roller is used to wind and support a material belt, and the second roller is used to wind the material belt that has been wound from the first roller and support the material belt. A first laser head is used to emit a first laser, which is used to etch a first sub-groove on the strip supported by the first roller; The second laser head is located on the same side of the material strip as the first laser head; the second laser head is used to emit a second laser, which is used to etch a second sub-groove on the material strip supported by the second roller; the second sub-groove is used to connect with the first sub-groove to form a complete groove.

2. The laser engraving apparatus according to claim 1, wherein The first laser head is provided with N1, where N1 is an integer and N1≥2. The N1 first laser heads are arranged at intervals along the axial direction of the first roller. The N1 first laser heads are used to etch N2 first sub-grooves on the material strip supported by the first roller, where N2 is an integer multiple of N1. The number of second laser heads is equal to that of the first laser heads. N1 second laser heads are arranged at intervals along the axial direction of the second roller. The N1 second laser heads are used to etch N2 second sub-grooves on the material strip supported by the second roller. The N2 second sub-grooves are used to connect with the N2 first sub-grooves one by one to form N2 complete grooves.

3. The laser engraving apparatus of claim 2, wherein, N1 can take the value of 2, 3, or 4.

4. The laser engraving apparatus of claim 1, wherein, It also includes a first dust removal module, which comprises: The first dust cover is provided with a first receiving groove, which is used to accommodate at least a portion of the first roller so that the portion of the material strip supported by the first roller is located in the first receiving groove; the first dust cover is also provided with a first light inlet hole, which is used to allow the first laser to enter the first receiving groove. The first dust extraction component has a first channel, one end of which is connected to the first receiving groove, and the other end of which is connected to the first negative pressure air source.

5. The laser engraving apparatus of claim 4, wherein, The first inner surface of the first receiving groove includes a first arc surface, which is used to surround at least a portion of the first roller.

6. The laser engraving apparatus according to claim 4 or 5, characterized in that, It also includes a second dust removal module, which includes: The second dust cover is provided with a second receiving groove, which is used to accommodate at least a portion of the second roller so that the portion of the material strip supported by the second roller is located in the second receiving groove; the second dust cover is also provided with a second light inlet hole, which is used to allow the second laser to enter the second receiving groove; The second dust extraction component has a second channel, one end of which is connected to the second receiving groove, and the other end of which is connected to the second negative pressure air source.

7. The laser engraving apparatus of claim 6, wherein, The second inner surface of the second receiving groove includes a second arcuate surface for surrounding at least a portion of the second roller.

8. The laser engraving apparatus of claim 1, wherein, The conveying assembly also includes: A first tensioning roller is used to wind and support the strip, and a first roller is used to wind the strip that is wound from the first tensioning roller; The first pressure roller is arranged side by side and at intervals with the first tensioning roller; A first driving member is used to drive the first pressure roller closer to the first tension roller so that the first pressure roller presses against the material belt supported by the first tension roller; the first driving member is also used to drive the first pressure roller away from the first tension roller.

9. The laser engraving apparatus of claim 8, wherein, The conveying assembly also includes: The second tensioning roller is used to wind the strip that has come off the first roller and to support the strip; the second roller is used to wind the strip that has come off the second tensioning roller. The second pressure roller is arranged side by side with a gap from the second tension roller; The second driving member is used to drive the second pressure roller closer to the second tension roller so that the second pressure roller presses against the material belt supported by the second tension roller; the second driving member is also used to drive the second pressure roller away from the second tension roller.

10. The laser engraving apparatus of claim 1, wherein, Assuming the angle between any two of the first direction, the second direction, and the third direction is greater than zero, the laser etching apparatus further includes: A first driving component is used to drive the first laser head to move along a first direction. The first driving component is also used to drive the first laser head to move along a second direction and a third direction. The second driving component is used to drive the second laser head to move along a first direction. The first driving component is also used to drive the second laser head to move along a second direction and a third direction.

Images