Laser cleaning device and battery production line

Abstract

The utility model provides a laser cleaning device and a battery production line. The laser cleaning device comprises a laser assembly capable of emitting laser towards a roller. The laser assembly is configured to emit laser which is flat-topped light; or, the laser assembly comprises a laser generator and a first diffractive optical element, the laser generator is configured to be capable of emitting laser in the form of Gaussian light, and the first diffractive optical element can homogenize the Gaussian light into flat-topped light. According to the scheme, the cleaning effect is guaranteed in a laser cleaning mode, and meanwhile, the laser irradiating the roller is configured to be flat top light, so that damage to the roller is small. Therefore, the laser cleaning device has a good cleaning effect, and meanwhile, the roller can be cleaned without damage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cleaning devices, in particular to a laser cleaning device and a battery production line. BACKGROUND

[0002] In the manufacturing process of a battery, there are coating, rolling, baking, die cutting, cutting, and laminating processes. Due to the adhesion and powder removal properties of the battery slurry, problems such as over-roller adhesion of slurry may occur in each process, which may affect the quality of the battery electrode sheet product and cause various defects. Therefore, manual wiping and cleaning are required in the middle. In the related art, the cleaning technology of the roller cannot solve the problems of low efficiency of manual wiping, the need for shutdown, insufficient wiping, and the like. In addition, due to the compact internal structure of the equipment, manual wiping with chemical cleaning agents at close range is inefficient, time-consuming, and highly dangerous. The cleaning with a scraper is not thorough enough, which may cause residue and damage the roller, resulting in scratches on the roller and causing indentations when rolling the electrode sheet. SUMMARY

[0003] The main purpose of the present application is to provide a laser cleaning device and a battery production line, which can achieve better cleaning effect and non-damaging cleaning of the roller.

[0004] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0005] The laser cleaning device is used for cleaning the roller, and the laser cleaning device comprises:

[0006] The laser assembly is configured to emit laser towards the roller;

[0007] The laser assembly is configured to emit laser in the form of flat-top light; or the laser assembly comprises a laser generator and a first diffractive optical element, the laser generator is configured to emit laser in the form of Gaussian light, and the first diffractive optical element can homogenize the Gaussian light into flat-top light.

[0008] In some embodiments, the laser assembly comprises a laser generator and a first diffractive optical element, the laser generator is configured to emit laser in the form of Gaussian light, and the first diffractive optical element can homogenize the Gaussian light into flat-top light;

[0009] The spot of the flat-top light is in any one of a square shape, a circular shape, and a strip shape.

[0010] In some embodiments, the laser assembly further comprises a second diffractive optical element, the second diffractive optical element is configured to split the laser beam.

[0011] In some embodiments, the laser cleaning device further comprises a galvanometer connected to the laser assembly, the galvanometer being capable of adjusting the direction of the laser light so as to cause the laser light to scan along the axial direction of the roller or to scan along the radial direction of the roller, and a control assembly configured to detect the relative position between the galvanometer and the roller so as to control the scanning trajectory of the laser light and / or the scanning speed of the laser light.

[0012] In some embodiments, the control assembly comprises a sensor, an encoder and a controller electrically connected to each other, the sensor being configured to acquire the position information of the roller, the encoder being configured to calculate the scanning trajectory of the laser light and / or the scanning speed of the laser light according to the position information, and the controller being configured to control the movement of the galvanometer.

[0013] In some embodiments, the laser cleaning device further comprises a moving assembly connected to the laser assembly and configured to drive the laser assembly to move along the axial direction.

[0014] In some embodiments, the number of the laser assemblies and the number of the galvanometers are both plural, and the laser assemblies and the galvanometers are arranged along the axial direction in a one-to-one correspondence.

[0015] In some embodiments, the laser cleaning device further comprises a field lens configured to be capable of focusing the laser light passing through the galvanometer.

[0016] In some embodiments, the laser cleaning device further comprises a dust removal assembly having a dust removal opening, the control assembly being configured to control the laser light to pass through the dust removal opening, and the dust removal assembly being configured to remove contaminants around the dust removal opening.

[0017] The embodiments of the second aspect of the utility model also provide a kind of, comprising the laser cleaning device and roller of any one of the above embodiments.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] The laser cleaning device of the present application comprises a laser assembly configured to be capable of emitting laser light towards the roller. In order to reduce the damage to the roller during cleaning, in one type of arrangement, the laser light emitted by the laser assembly is flat-top light; in another type of arrangement, the laser assembly comprises a laser generator and a first diffractive optical element, the laser generator is configured to emit laser light in the form of Gaussian light, and the first diffractive optical element can homogenize the Gaussian light into flat-top light. Therefore, this scheme not only ensures the cleaning effect by means of laser cleaning, but also causes less damage to the roller by configuring the laser light irradiated on the roller as flat-top light. Therefore, the laser cleaning device of the present application has better cleaning effect and can also achieve non-damaging cleaning of the roller. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0021] Figure 1 A perspective view of the laser cleaning device provided in an embodiment of the present application; wherein the laser assembly and the control assembly are shown in a simplified schematic form;

[0022] Figure 2 A perspective view of the laser cleaning device provided in an embodiment of the present application; wherein the laser assembly and the control assembly are shown in a simplified schematic form; Figure 1 A partial enlarged view of A in FIG. 1;

[0023] Figure 3 A schematic view of the laser scanning trajectory provided in an embodiment of the present application; wherein the laser scans along the radial direction;

[0024] Figure 4 A schematic view of the laser scanning trajectory provided in an embodiment of the present application; wherein the laser scans along the axial direction;

[0025] Figure 5 A side view of the laser cleaning device provided in an embodiment of the present application; wherein part of the laser assembly and the control assembly are removed;

[0026] Figure 6 A top view of the laser cleaning device provided in an embodiment of the present application; wherein part of the laser assembly and the control assembly are removed.

[0027] Explanation of the reference signs:

[0028] 100 - laser cleaning device;

[0029] 110 - laser assembly; 111 - laser generator; 112 - first diffractive optical element; 113 - second diffractive optical element;

[0030] 120 - galvanometer;

[0031] 130 - control assembly;

[0032] 140 - moving assembly;

[0033] 150 - field lens;

[0034] 160 - dust removal assembly; 161 - dust removal opening;

[0035] 200 - roller;

[0036] 300 - laser;

[0037] X-axis direction;

[0038] Y-radial direction.

[0039] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0041] It should be noted that if the present application has directionality indication (such as up, down, left, right, front, back, etc.) in the embodiments, the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directionality indication also changes accordingly.

[0042] In addition, if the present application has the description of "first", "second", etc. in the embodiments, the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the whole text, it means that the three parallel schemes include A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope of the present application.

[0043] The battery has coating, rolling, baking, die cutting, cutting, and laminating processes in the manufacturing process. Due to the adhesion and powder removal of the battery slurry, problems such as over-roller adhesion of slurry occur in each process, which affects the quality of the battery electrode sheet product and causes various defects. Manual cleaning is required in the middle. In the related art, the cleaning technology of the roller cannot solve the problems of low efficiency of manual wiping, the need for shutdown, insufficient wiping, and the like. In addition, due to the compact internal structure of the equipment, manual wiping with chemical cleaning agent at close range is inefficient, time-consuming, and highly dangerous. The cleaning of the scraper is not thorough enough, and residues may be left, and the roller may be damaged, causing scratches on the roller, which may cause indentations when the electrode sheet is rolled.

[0044] The applicant initially found that if a laser cleaning technology is used to clean the roller, the laser may damage the roller, and it is difficult to achieve efficient cleaning at high power while avoiding damage to the roller.

[0045] In view of this, referring to Figures 1-6 The embodiment of the present application provides a laser cleaning device 100 for cleaning a roller 200, and the laser cleaning device 100 comprises a laser assembly 110. The part to be cleaned of the roller 200 can be the roller surface located on the outer periphery of the roller 200.

[0046] Specifically, referring to Figures 1-2 The laser assembly 110 is configured to emit laser 300 towards the roller 200. Specifically, in some embodiments, the laser assembly 110 can include a laser generator 111, and can also include an optical lens, which can be an object lens, a collimating lens, etc., for focusing and collimating the laser 300. In addition, it can also include a reflecting mirror and a protective mirror, which are respectively used for reflecting and protecting the optical element to prevent dust and other impurities from entering. In addition, the laser cleaning device 100 can also include a detection instrument that can detect the residual thickness before and after cleaning, a servo mechanical control mechanism, an optoelectronic component, etc.

[0047] In particular, the laser assembly 110 is configured to emit laser 300 in the form of flat-top light; or, referring to Figure 1The laser assembly 110 includes a laser generator 111 and a first diffractive optical element 112. The laser generator 111 is configured to emit laser 300 in the form of Gaussian light, and the first diffractive optical element 112 can homogenize the Gaussian light into flat-top light. The first diffractive optical element 112 can also be referred to as a DOE (Diffractive Optical Element), which can be a lens or a set of lenses. The difference between Gaussian light and flat-top light lies in the distribution of irradiance (light intensity). The irradiance cross-section of Gaussian light decreases symmetrically with increasing distance from the center, i.e., the light intensity is strongest at the center and gradually decreases towards the edge, showing a Gaussian distribution in space. Flat-top light has a relatively flat top feature. In a certain area close to the center, the light intensity changes little and approaches a relatively constant value. It can be understood that the above two types of settings can make the laser 300 irradiated to the roller 200 flat-top light, which is more uniform and helps to reduce damage to the roller 200. The longer the homogenized light spot length, the faster the cleaning efficiency.

[0048] It can be seen that the laser cleaning device 100 of the present application includes a laser assembly 110 configured to emit laser 300 towards the roller 200. In order to reduce damage to the roller 200 during cleaning, in one type of setting, the laser 300 emitted by the laser assembly 110 is flat-top light. In another type of setting, the laser assembly 110 includes a laser generator 111 and a first diffractive optical element 112. The laser generator 111 is configured to emit laser 300 in the form of Gaussian light, and the first diffractive optical element 112 can homogenize the Gaussian light into flat-top light. Therefore, the present scheme ensures cleaning effect by cleaning with laser 300, and also configures the laser 300 irradiated to the roller 200 as flat-top light, so that the damage to the roller 200 is small. Therefore, the laser cleaning device 100 of the present application has better cleaning effect, and also can realize non-damage cleaning of the roller 200.

[0049] Further, in some embodiments, the flat-top light spot homogenized by the first diffractive optical element 112 is in any one of a square, a circle, a strip (which can be a rectangular strip, an oblong strip, or any suitable shape). In addition, the light spot can also be in any other suitable shape. It can be understood that according to the cleaning requirements, the shape of the light spot can be set by the first diffractive optical element 112 to achieve better cleaning effect, or to make the light spot more easily match the roller surface or the set scanning path of the roller 200. In some embodiments, the size of the light spot can also be set by the first diffractive optical element 112 or other diffractive optical elements.

[0050] In addition, in order to improve the cleaning efficiency, referring to Figure 1In some embodiments, the laser assembly 110 further comprises a second diffractive optical element 113 configured to split the laser beam 300. It can be understood that the splitting of the laser beam 300 can clean the roller body simultaneously, and the number of splitting can be set according to the needs, for example, one into two, one into ten, one into fifty, etc. The more the number of splitting, the faster the cleaning efficiency. The setting mode and structure of the second diffractive optical element 113 can be the same or similar to the first diffractive optical element 112, both of which can be a lens or a group of lenses.

[0051] Referring to Figure 1 , Figure 2 , Figure 5 and Figure 6 In some embodiments, the laser cleaning device 100 further comprises a galvanometer 120 connected to the laser assembly 110. Referring to Figures 3-4 In some embodiments, the galvanometer 120 can adjust the direction of the laser beam 300 to make the laser beam 300 scan along the axial direction X of the roller 200 or along the radial direction Y of the roller 200. It can be understood that the laser assembly 110 is used to emit the laser beam 300 for cleaning, and the laser beam 300 is incident to the galvanometer 120, which can make the laser beam 300 emitted by the laser assembly 110 pass through, thereby changing the direction of the laser beam 300. The galvanometer 120 can be composed of a mirror and a driving motor, by controlling the driving motor, the mirror can rotate at high speed and high precision, thereby changing the direction of the incident laser beam 300, so that the laser beam 300 can irradiate to different positions of the roller 200 or irradiate to the roller 200 at different angles.

[0052] It should be noted that the radial direction Y defined in the present application is parallel to the rotation axis of the roller 200, and the axial direction X is parallel to the rotation radial direction Y of the roller 200, that is, perpendicular to the axial direction X.

[0053] Based on the above-mentioned embodiment of the galvanometer 120, referring to Figures 1-4In some embodiments, the laser cleaning device 100 further comprises a control assembly 130 configured to detect the relative position between the galvanometer 120 and the roller 200, and control the scanning trajectory of the laser 300 and / or the scanning speed of the laser 300. Wherein, the control effect of the control assembly 130 can be to set the scanning trajectory of the laser 300 and send the corresponding control signal to the galvanometer 120 on the one hand; on the other hand, the control assembly 130 can also set the scanning speed of the laser 300 along the scanning path, which can be specifically to control the swing speed of the galvanometer 120. In addition, during the working process of the control assembly 130, the roller 200 can rotate around the rotation axis, and at the same time the galvanometer 120 can make the laser 300 scan along the set trajectory, and in this process, the control assembly 130 can calculate and control the laser 300 according to the position information of the roller 200, or the rotation speed of the roller 200, the position of the galvanometer 120 and other types of data, and plan the scanning route and / or scanning speed of the laser 300 on the roller. It should be noted that the above-mentioned operation of controlling the scanning trajectory of the laser 300 and / or the scanning speed of the laser 300 can be pre-set before the laser 300 is emitted, or can be set during the emission process of the laser 300 (which can be specifically to set or adjust in real time according to the detected relative position between the galvanometer 120 and the roller 200).

[0054] It can be understood that the control assembly 130 is used to control the laser generator 111 to emit the laser 300, and the laser 300 is reflected to the surface to be cleaned of the roller 200 through the galvanometer 120 device, and the control assembly 130 controls the galvanometer 120 to move at a preset scanning speed, or controls the galvanometer 120 to move at a preset scanning trajectory. Through the above-mentioned control assembly 130 configured, compared with the cleaning method in the related art that the roller 200 is stopped first, and then the position of the laser generator 111 is adjusted, and each area of the roller 200 is cleaned multiple times in a region-by-region manner, the laser cleaning device 100 of the present application can control the scanning trajectory of the laser 300 and / or the scanning speed of the laser 300 through the detection effect of the control assembly 130, so that the cleaning effect can be realized when the roller 200 rotates at different speeds, and the seamless connection of the cleaning edge can be realized in the scanning process of the laser 300, which can avoid the problems of repeated cleaning area or incomplete cleaning area in the scanning process of the laser 300. Therefore, the laser cleaning device 100 of the present application has strong adaptability and adjustment capability, so as to clean the roller 200 in real time, and has high cleaning efficiency.

[0055] For the detection and control of the control assembly 130, the control assembly 130 can specifically control the laser 300 according to the position information of the roller 200. Specifically, in some embodiments, the control assembly 130 includes a sensor, an encoder and a controller electrically connected to each other. The sensor is configured to obtain the position information of the roller 200. The encoder is configured to calculate the scanning trajectory of the laser 300 and / or the scanning speed of the laser 300 according to the position information. The controller is configured to control the movement of the galvanometer 120. In some embodiments, the sensor can be one of a proximity switch, a photoelectric sensor, and a vision sensor (achieved by the principle of photographing or visual monitoring). In addition, during the rotation of the roller 200, the sensor can be configured to provide a pulse signal for the encoder to enable the encoder to obtain the relative rotation position of any point on the roller surface of the roller 200 at each time. Through the above-mentioned sensor, encoder and controller, the control assembly 130 can accurately detect the relative rotation position of the roller 200 to reflect the cleaning condition of the roller 200, and accurately control the movement of the laser 300, so as to facilitate the control of the parallel and equal spacing between each beam of laser 300 irradiated on the roller 200, and realize the reasonable splicing of each corresponding cleaning area of the laser 300. Seamless splicing can be achieved.

[0056] In addition, in some embodiments, the control assembly 130 can include multiple sensors and multiple control structures, so that different functional requirements or different rhythm requirements can be transmitted to the controller through the PLC to realize linkage to adapt to multiple states and multiple scenes.

[0057] In addition, for the specific control of the controller. In some embodiments, the controller can also control the laser generator 111 to emit the laser 300, and the laser 300 is reflected to the roller surface of the roller 200 through the galvanometer 120. The controller can control the galvanometer 120 to swing regularly at a preset galvanometer 120 scanning speed, and control the galvanometer 120 to move based on the target scanning path and the galvanometer 120 moving speed, and can obtain the real-time actual galvanometer 120 moving speed. The target galvanometer 120 scanning speed is calculated according to the size parameter, the line spacing and the actual galvanometer 120 moving speed. The preset galvanometer 120 scanning speed is compensated by the target galvanometer 120 scanning speed, and the galvanometer 120 device is controlled to swing regularly at the compensated preset galvanometer 120 scanning speed. By determining the galvanometer 120 moving speed according to the size parameter, the line spacing of the target scanning path and the preset galvanometer 120 scanning speed, the laser 300 scanning path with equal line spacing can be maintained during the cleaning process, and the uniformity and cleaning efficiency are improved. According to the actual galvanometer 120 moving speed obtained during the cleaning process, the target galvanometer 120 scanning speed is calculated to compensate the preset galvanometer 120 scanning speed, which further guarantees the equal spacing of the target scanning path in the actual cleaning process.

[0058] In order to improve the cleaning efficiency, the laser assembly 110 can emit laser 300 with large pulse energy, specifically, in some embodiments, the single pulse energy of the laser 300 emitted by the laser assembly 110 is greater than 2mj and less than or equal to 100mj.

[0059] In order to improve the flexibility of the laser cleaning device 100, see Figures 1-2 In some embodiments, the laser cleaning device 100 further comprises a moving assembly 140 connected to the laser assembly 110 and configured to drive the laser assembly 110 to move along the axial direction X. The moving assembly 140 described above can expand the coverage range of the laser 300 along the radial direction Y by driving the laser assembly 110 and the galvanometer 120 to move together along the axial direction X, thereby facilitating the setting of the scanning trajectory of the laser 300, so that the cleaning effect of the laser 300 can cover the entire roller surface. On the other hand, it can use fewer laser assemblies 110 and galvanometers 120 to cover a larger range, thereby facilitating cost savings. Specifically, the driving source of the moving assembly 140 can be a motor (which can be a direct drive motor or a servo motor) and the motor can cooperate with a screw device to drive the laser assembly 110.

[0060] One laser assembly 110 and one galvanometer 120 can form a set of laser devices. According to the efficiency requirement, the user can choose to use one or more sets of laser devices and arrange them in any suitable manner. Specifically, see Figure 1 Figure 2 Figure 5 and Figure 6 In some embodiments, the number of laser assemblies 110 and galvanometers 120 is multiple, and they are arranged along the axial direction X, and each laser assembly 110 and galvanometer 120 corresponds one-to-one. The above arrangement can make multiple laser assemblies 110 and multiple galvanometers 120 collectively cover the entire area of the roller along the axial direction X, that is, it can facilitate the full coverage of the cleaning area along the axial direction X by using multiple laser assemblies 110 and multiple galvanometers 120. In addition, arranging multiple laser assemblies 110 and multiple galvanometers 120 is also conducive to improving the cleaning efficiency. In combination with the above embodiments, making multiple laser assemblies 110 and multiple galvanometers 120 move along the axial direction X can further improve the cleaning efficiency.

[0061] See Figure 1 Figure 2 Figure 5 and Figure 6 ​​​​In some embodiments, the laser cleaning device 100 further comprises a field lens 150 configured to focus the laser 300 passing through the galvanometer 120. It can be understood that the field lens 150 changes the propagation direction and focusing characteristics of the laser 300 by refracting or reflecting the laser 300, and the field lens 150 can also shape the laser 300. In addition, in some embodiments, the laser cleaning device 100 further comprises a focal length adjusting device, which can adjust the distance between the field lens 150 and the roller 200 in the front-back direction to adjust the appropriate focal length of the field lens 150, and the relative positions of the laser generator 111, the galvanometer 120 and the field lens 150 can be fixed by the laser generator 111 fixing bracket and the laser generator 111 fixing ring.

[0062] Referring to Figure 1 , Figure 2 , Figure 5 and Figure 6 In some embodiments, the laser cleaning device 100 further comprises a dust removal assembly 160 having a dust removal opening 161, and the control assembly 130 is configured to control the laser 300 to pass through the dust removal opening 161, and the dust removal assembly 160 is configured to remove contaminants around the dust removal opening 161. More specifically, in some embodiments, the dust removal assembly 160 can have a dust suction member, the dust suction member itself defines a dust suction cavity, and the dust suction member is provided with a dust suction port in communication with the dust suction cavity, the dust suction member extends around to define the dust removal opening 161, and the dust suction port defines the dust removal opening 161 towards the dust removal opening 161 or the opening edge of the dust suction port, so that the dust suction port can suck the contaminants around the dust removal opening 161 into the dust suction cavity.

[0063] In addition, in some embodiments, the laser cleaning device 100 can further comprise a cooling assembly configured to cool the surrounding of the laser assembly 110 or the surrounding of the roller 200. Specifically, the cooling assembly can adopt a water cooling system, for example, a water chiller is used to continuously cool the laser generator 111, so that the whole system can work stably and continuously. When the power of the laser generator 111 is low, the water cooling system can be replaced by an air cooling system.

[0064] The second aspect of the embodiments of the utility model further provides a battery production line comprising the laser cleaning device 100 and the roller 200 of any of the above embodiments.

[0065] Thanks to the improvement of the laser cleaning device 100 in the above embodiments, the battery production line of the second aspect of the embodiments of the utility model has the same technical effects as the laser cleaning device 100 in the above embodiments. Here, no longer repeated.

[0066] The above merely preferred embodiments of the present application, and not therefore limit the patent scope of the present application, all in the application of the application concept, using the application specification and drawing content of the equivalent structure transformation, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. Laser cleaning device for cleaning a roller, characterized in that The laser cleaning device comprises: a laser assembly configured to emit laser light towards the roller; wherein the laser assembly is configured to emit the laser light in a flat-top light; or the laser assembly comprises a laser generator configured to emit the laser light in a Gaussian light, and a first diffractive optical element capable of homogenizing the Gaussian light into a flat-top light.

2. The laser cleaning device according to claim 1, wherein the laser assembly comprises a laser generator configured to emit the laser light in a Gaussian light, and a first diffractive optical element capable of homogenizing the Gaussian light into a flat-top light; the spot of the flat-top light is in any one of a square, a circle, and a strip.

3. The laser cleaning device according to claim 1, wherein the laser assembly further comprises a second diffractive optical element configured to split the laser light.

4. The laser cleaning device according to claim 1, wherein the laser cleaning device further comprises a galvanometer connected to the laser assembly, the galvanometer being capable of adjusting a direction of the laser light to cause the laser light to scan along an axial direction of the roller or along a radial direction of the roller, and a control assembly configured to detect a relative position between the galvanometer and the roller to control a scanning trajectory of the laser light and / or a scanning speed of the laser light.

5. The laser cleaning device according to claim 4, wherein the control assembly comprises a sensor, an encoder, and a controller electrically connected to each other, the sensor being configured to acquire position information of the roller, the encoder being configured to calculate the scanning trajectory of the laser light and / or the scanning speed of the laser light according to the position information, and the controller being configured to control a movement of the galvanometer.

6. The laser cleaning device according to claim 1, wherein the laser cleaning device further comprises a moving assembly connected to the laser assembly and configured to drive the laser assembly to move along an axial direction of the roller.

7. The laser cleaning device according to claim 4, wherein the number of the laser assemblies and the number of the galvanometers are both plural, and the laser assemblies and the galvanometers are arranged along the axial direction, each of the laser assemblies corresponding to one of the galvanometers.

8. The laser cleaning device according to claim 4, wherein the laser cleaning device further comprises a field lens configured to focus the laser light passing through the galvanometer.

9. The laser cleaning device according to claim 4, wherein the laser cleaning device further comprises a dust removal assembly having a dust removal opening, the control assembly is configured to control the laser light to pass through the dust removal opening, and the dust removal assembly is configured to remove contaminants around the dust removal opening.

10. A battery production line, characterized by comprises: the laser cleaning device according to any one of claims 1-9; and the roller.

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