Multifunctional laser cleaning equipment

Abstract

The utility model discloses multifunctional laser cleaning equipment which comprises an unwinding device, a tension adjusting device, a front laser cleaning mechanism, a deviation rectifying mechanism, a reverse laser cleaning mechanism and a winding device which are sequentially arranged in the pole piece belt conveying direction. Physical cleaning mechanisms are arranged between the front side laser cleaning mechanism and the deviation rectifying mechanism and between the back side laser cleaning mechanism and the winding device, and the front side laser cleaning mechanism and the back side laser cleaning mechanism are used for pre-cleaning coatings of to-be-cleaned areas on the front side and the back side of the pole piece correspondingly; and the physical cleaning mechanism is used for cleaning the residual coating of the to-be-cleaned area of the pole piece. According to the multifunctional laser cleaning equipment disclosed by the utility model, most of pole piece coating layers are cleaned in advance through laser, and residual layers are cleaned by applying a physical wiping or scraping manner, so that the risk of laser damage or punching of a perforated foil is avoided, and the performance and the safety of a battery are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery manufacturing technical field, concretely relates to a multifunctional laser cleaning equipment. BACKGROUND

[0002] In the production process of new energy lithium battery, the positive and negative electrode sheet roll needs to be processed by laser surface treatment, and the conventional electrode sheet cleaning equipment on the market is single pure laser cleaning process. In order to clean the coating on the surface of the electrode sheet, a larger laser energy or multiple cleaning layers are needed to clean completely, but this will cause foil damage or perforation, resulting in battery conductivity decline or short circuit. Especially for the positive electrode sheet after rolling and compaction, because the melting point of the positive electrode coating is high, the energy required for laser ablation and gasification is larger, and the melting point of the aluminum foil substrate is lower, the density is smaller and the heat conduction is poor, the probability of pinhole is as high as more than 50%; Therefore, the pure laser positive electrode cleaning is difficult to popularize and apply in lithium battery enterprises. SUMMARY

[0003] In order to overcome the defects of the prior art, the utility model provides a multifunctional laser cleaning equipment, which pre-cleans most of the electrode sheet coating layer by laser, and then applies physical wiping or scraping to clean the residual layer, avoiding the risk of laser damage or perforation of foil, thereby improving the performance and safety of the battery.

[0004] The utility model solves the technical scheme adopted by its technical problems:

[0005] A multifunctional laser cleaning equipment, comprising unwinding device, tension adjusting device, front laser cleaning mechanism, deviation rectifying mechanism, back laser cleaning mechanism and winding device arranged in turn along the electrode sheet running direction, physical cleaning mechanism is arranged between the front laser cleaning mechanism and the deviation rectifying mechanism and between the back laser cleaning mechanism and the winding device, the front laser cleaning mechanism and the back laser cleaning mechanism are used for pre-cleaning the coating of the front and back of the electrode sheet to be cleaned respectively, and the physical cleaning mechanism is used for cleaning the residual coating of the electrode sheet to be cleaned.

[0006] As a further improvement of the above technical scheme, the physical cleaning mechanism comprises a brush assembly, a non-woven fabric wiping assembly or a liquid spraying scraping assembly.

[0007] As a further improvement of the above technical scheme, the brush assembly comprises a brush, a brush R-axis module, a brush X-axis module, a brush Y-axis module, a brush Z-axis module and a first adsorption platform, the first adsorption platform is used for adsorbing and fixing the electrode sheet, the brush X-axis module, the brush Y-axis module and the brush Z-axis module are used for adjusting the position of the brush to correspond to the electrode sheet to be cleaned, and the brush R-axis module is used for driving the brush to rotate to clean the residual coating of the electrode sheet to be cleaned.

[0008] As a further improvement of the above technical solution, the brush assembly further comprises a dust cover arranged opposite to the brush for sucking dust generated by the brush cleaning the residual coating of the to-be-cleaned area of the pole piece.

[0009] As a further improvement of the above technical solution, the non-woven fabric wiping assembly comprises a non-woven fabric, a non-woven fabric winding and unwinding structure, a wiping roller, a wiping roller transverse movement module and a second adsorption platform for adsorbing and fixing the pole piece, the non-woven fabric winding and unwinding structure is used for winding and unwinding the non-woven fabric, the wiping roller is used for supporting the non-woven fabric, and the wiping roller transverse movement module is used for moving the wiping roller to drive the non-woven fabric to contact the to-be-cleaned area of the pole piece, and the non-woven fabric is used for cleaning the residual coating of the to-be-cleaned area of the pole piece when the non-woven fabric is running.

[0010] As a further improvement of the above technical solution, the non-woven fabric wiping assembly further comprises a mounting plate and non-woven fabric X-axis, Y-axis and Z-axis modules for driving the mounting plate to move along the X-axis, Y-axis and Z-axis directions respectively, and the non-woven fabric winding and unwinding structure, the wiping roller and the wiping roller transverse movement module are mounted on the mounting plate.

[0011] As a further improvement of the above technical solution, the liquid spraying and scraping cleaning assembly comprises a spraying valve, a scraper, a scraper Z-axis module, a liquid spraying and scraping X-axis module, a liquid spraying and scraping Y-axis module and a third adsorption platform for adsorbing and fixing the pole piece, the liquid spraying and scraping X-axis module is used for driving the spraying valve and the scraper to move along the X-axis direction, the liquid spraying and scraping Y-axis module is used for driving the spraying valve and the scraper to move along the Y-axis direction, and the scraper Z-axis module is used for driving the scraper to move along the Z-axis direction.

[0012] As a further improvement of the above technical solution, a pressure sensor is arranged between the scraper and the scraper Z-axis module.

[0013] As a further improvement of the above technical solution, the physical cleaning mechanism between the front laser cleaning mechanism and the deviation rectifying mechanism is a front physical cleaning mechanism, the front physical cleaning mechanism comprises one liquid spraying and scraping cleaning assembly, or the front physical cleaning mechanism comprises two brush assemblies, or the front physical cleaning mechanism comprises two non-woven fabric wiping assemblies, or the front physical cleaning mechanism comprises one brush assembly and one non-woven fabric wiping assembly.

[0014] As a further improvement of the above technical solution, the physical cleaning mechanism between the back laser cleaning mechanism and the winding device is a back physical cleaning mechanism, the back physical cleaning mechanism comprises one liquid spraying and scraping cleaning assembly, or the back physical cleaning mechanism comprises two brush assemblies, or the back physical cleaning mechanism comprises two non-woven fabric wiping assemblies, or the back physical cleaning mechanism comprises one brush assembly and one non-woven fabric wiping assembly.

[0015] The utility model discloses a beneficial effect is: in the cleaning pole piece, first through the front laser cleaning mechanism and wash away the most part coating layer of pole piece front to be cleaned area, then adopt the physical cleaning mechanism and wash clean the residual coating layer through the mode of wiping or scraping, and similarly, first through the back laser cleaning mechanism and wash away the most part coating layer of pole piece back to be cleaned area, then adopt the physical cleaning mechanism and wash clean the residual coating layer through the mode of wiping or scraping. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model is further illustrated below in combination with the drawings and examples.

[0017] Figure 1 It is the functional laser cleaning equipment layout figure of the utility model embodiment one;

[0018] Figure 2 It is the functional laser cleaning equipment layout figure of the utility model embodiment two;

[0019] Figure 3 It is the functional laser cleaning equipment layout figure of the utility model embodiment three;

[0020] Figure 4 It is the functional laser cleaning equipment layout figure of the utility model embodiment four;

[0021] Figure 5 It is the pole piece processing state diagram of the utility model;

[0022] Figure 6 It is Figure 5 Middle A-A section view;

[0023] Figure 7 It is the size schematic view of pole piece;

[0024] Figure 8 It is the structure schematic view of brush subassembly in the utility model embodiment;

[0025] Figure 9 It is the structure schematic view of brush in the utility model embodiment;

[0026] Figure 10 It is the structure schematic view of non - woven fabric wiping subassembly in the utility model embodiment;

[0027] Figure 11 It is the overhead view of non - woven fabric wiping subassembly in the utility model embodiment;

[0028] Figure 12 It is the structure schematic view of liquid spraying scraping and washing subassembly in the utility model embodiment.

[0029] 1, unwinding device; 2, tape receiving platform; 3, tension swing rod one; 4, tension detection roller one; 5, front laser cleaning mechanism; 6, driving device; 7, pole piece tape; 8, front brush assembly one; 9, front brush assembly two; 10, deviation rectifying mechanism; 11, back laser cleaning mechanism; 12, back brush assembly one; 13, back brush assembly two; 14, dust removal mechanism; 15, flaw detection CCD; 16, size detection CCD; 17, labeling mechanism; 18, tension swing rod two; 19, tension detection roller two; 20, winding device; 21, front non-woven fabric wiping assembly one; 22, front non-woven fabric wiping assembly two; 23, back non-woven fabric wiping assembly one; 24, back non-woven fabric wiping assembly two; 25, front liquid spraying and scraping assembly; 26, back liquid spraying and scraping assembly; 27, passing roller;

[0030] 101, first suction platform; 102, brush; 103, dust cover; 104, brush X-axis module; 105, brush Y-axis module; 106, brush Z-axis module; 107, brush R-axis module;

[0031] 201, second suction platform; 202, non-woven fabric unwinding structure; 203, non-woven fabric winding structure; 204, wiping roller horizontal movement module; 205, non-woven fabric Y-axis module; 206, non-woven fabric Z-axis module; 207, non-woven fabric X-axis module; 208, mounting plate; 209, wiping roller; 210, non-woven fabric;

[0032] 301, third suction platform; 302, spraying valve; 303, connecting plate; 304, scraper; 305, pressure sensor; 306, scraper Z-axis module; 307, liquid spraying and scraping Y-axis module; 308, liquid spraying and scraping X-axis module. DETAILED DESCRIPTION

[0033] The concept, specific structure and generated technical effects of the present application will be clearly and completely described below in combination with the embodiments and drawings, so as to fully understand the purposes, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. In addition, all the coupling / connection relations involved in the patent do not mean that the components are directly connected, but means that a better coupling structure can be formed by adding or reducing coupling auxiliary components according to the specific implementation situation, such as fixed connection / fixed installation which can be selected according to the needs, such as screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and the like, and detachable connection which can be selected according to the needs, such as screw connection, bolt connection, threaded connection, buckle connection, mortise and tenon connection, magic tape connection and the like. The various technical features in the present application can be combined interactively without mutual contradiction and conflict.

[0034] With reference to Figures 1-7 The basic embodiment of the present application provides a multifunctional laser cleaning equipment, which comprises unwinding device 1, belt receiving platform 2, tension swing rod 1 3, tension detection roller 1 4, front laser cleaning mechanism 5, front physical cleaning mechanism, deviation correction mechanism 10, back laser cleaning mechanism 11, back physical cleaning mechanism, dust removal mechanism 14, size detection CCD 16, flaw detection CCD 15, labeling mechanism 17, tension swing rod 2 18, tension detection roller 2 19 and winding device 20 arranged in sequence along the direction of the polar piece belt, and the polar piece belt 7 is supported and turned by a plurality of rollers 27, in addition, the front laser cleaning mechanism 5, the front physical cleaning mechanism, the back laser cleaning mechanism 11, the back physical cleaning mechanism, the flaw detection CCD 15 and the size detection CCD 16 are all provided with independent driving devices 6, and the driving devices 6 are used for positioning the polar piece during material feeding and belt running.

[0035] When the multifunctional laser cleaning equipment is running, the polar piece belt 7 is driven to run by the driving device 6, and the polar piece belt 7 is supported and turned by the plurality of rollers 27. Figures 1-4The electrode is threaded according to the conveyor belt method shown in the layout diagram. First, the electrode sheet is unwound by the unwinding device 1 and conveyed along the roller 27. The tension is controlled and fed back by the tension adjustment device (tension swing rod 1 3, tension detection roller 1 4, tension swing rod 2 18, tension detection roller 2 19). The cleaning of the front side of the electrode sheet is completed sequentially by the front laser cleaning mechanism 5 and the front physical cleaning mechanism. The cleaning of the back side of the electrode sheet is completed sequentially by the back laser cleaning mechanism 11 and the back physical cleaning mechanism. After the electrode sheet is cleaned, the electrode sheet is wiped and dust is adsorbed by the dust removal mechanism 14 using the brush 102. Then, the groove (cleaning area) is inspected for size CCD and defects by CCD. NG products are labeled with corresponding defective labels by the labeling mechanism 17. The electrode sheet is then wound up by the rewinding device 20.

[0036] In the specific cleaning process, the front laser cleaning mechanism 5 removes most of the coating (coating thickness T2) on the front side of the electrode to be cleaned area (slot), leaving only a small amount of coating thickness T1 (slot status as "after laser cleaning"). At this time, the laser will not damage the foil (foil thickness H). Then, the electrode material belt 7 continues to move and positions the "after laser cleaning" slot to the front physical cleaning mechanism, cleaning away the residual layer of slot T1 thickness (slot status as "after physical wiping"), thus completing the cleaning of the front side of the electrode. The cleaning process on the back side of the electrode is the same as above.

[0037] This invention can be adapted to and compatible with multiple production processes by changing the front / back physical cleaning mechanism, as shown in Examples 1-4 below:

[0038] Example 1: The layout of the multifunctional laser cleaning equipment is as follows Figure 1 As shown, the front physical cleaning mechanism includes two brush assemblies, namely front brush assembly 1 8 and front brush assembly 2 9; the back physical cleaning mechanism includes two brush assemblies, namely back brush assembly 1 12 and back brush assembly 2 13.

[0039] In this embodiment, refer to Figures 5-7During electrode cleaning, the drive unit 6 positions the "to-be-cleaned area" slot on the front of the electrode to the front laser cleaning mechanism 5. Then, the laser removes most of the coating (thickness T2) on the front of the slot area, leaving only a small amount of coating thickness T1 (slot status as "after laser cleaning"). At this time, the laser will not damage the foil (thickness H). Then, the conveyor belt continues to move, and the drive unit 6 positions the "after laser cleaning" slot to the front brush assembly 8. The brush 102 in the front brush assembly 8 rotates and physically wipes away the residual layer of thickness T1 in the slot (slot status as "after physical wiping"). If a second wiping by the brush 102 is required to clean it, the front brush assembly 9 is used for a second wiping. Similarly, the laser cleaning and brush 102 wiping methods on the reverse side are performed in the same way as on the front side. After both sides have been cleaned and wiped, the electrode sheet is fed by the drive device 6 to position the slots to the defect detection CCD 15 and size detection CCD 16 to determine whether it is qualified. If it is not qualified, an NG label needs to be affixed to the corresponding slot. Finally, the winding device 20 winds up the electrode sheet.

[0040] Example 2, the layout of the multifunctional laser cleaning equipment is as follows: Figure 2 As shown, the front physical cleaning mechanism includes two non-woven fabric wiping components, namely front non-woven fabric wiping component one 21 and front non-woven fabric wiping component two 22; the reverse physical cleaning mechanism includes two non-woven fabric wiping components, namely reverse non-woven fabric wiping component one 23 and reverse non-woven fabric wiping component two 24.

[0041] In this embodiment, refer to Figures 5-7 During electrode cleaning, the drive unit 6 positions the "to-be-cleaned area" slot on the front of the electrode to the front laser cleaning mechanism 5. Then, the laser removes most of the coating (thickness T2) on the front of the slot area, leaving only a small amount of coating thickness T1 (slot status as "after laser cleaning"). At this time, the laser will not damage the foil (thickness H). Then, the conveyor belt continues to move, and the drive unit 6 positions the "after laser cleaning" slot to the front non-woven fabric wiping component 21. The non-woven fabric 210 in the front non-woven fabric wiping component 21 moves to physically wipe away the residual layer of thickness T1 in the slot (slot status as "after physical wiping"). If a second wiping with the non-woven fabric 210 is required to clean it, the front non-woven fabric wiping component 22 is used for the second wiping. Similarly, the laser cleaning and non-woven fabric 210 wiping methods on the reverse side are performed in the same way as on the front side. After both sides have been cleaned and wiped, the electrode sheet is fed by the drive device 6 to position the slots to the defect detection CCD 15 and size detection CCD 16 to determine whether it is qualified. If it is not qualified, an NG label needs to be affixed to the corresponding slot. Finally, the winding device 20 winds up the electrode sheet.

[0042] Example 3, the layout of the multifunctional laser cleaning equipment is as follows:Figure 1 As shown, the front physical cleaning mechanism includes a brush assembly and a non-woven fabric wiping assembly, namely the front brush assembly 8 and the front non-woven fabric wiping assembly 22; the back physical cleaning mechanism includes a brush assembly and a non-woven fabric wiping assembly, namely the back brush assembly 12 and the back non-woven fabric wiping assembly 24.

[0043] In this embodiment, refer to Figures 5-7 During electrode cleaning, the drive unit 6 positions the "to-be-cleaned area" slot on the front of the electrode to the front laser cleaning mechanism 5. Then, the laser removes most of the coating (thickness T2) on the front of the slot area, leaving only a small amount of coating thickness T1 (slot status as "after laser cleaning"). At this time, the laser will not damage the foil (thickness H). Then, the conveyor belt continues to move, and the drive unit 6 positions the "after laser cleaning" slot to the front brush assembly 8. The brush 102 in the front brush assembly 8 rotates and physically wipes away the residual layer of thickness T1 in the slot (slot status as "after physical wiping"). If a second wiping is required to clean it, the front non-woven fabric wiping assembly 22 is used for a second wiping. Similarly, the laser cleaning, brush 102 wiping, and non-woven fabric 210 wiping methods for the reverse side slots are performed in the same way as for the front side. After both sides have been cleaned and wiped, the electrode sheet is fed through the drive device 6 to position the slots to the defect detection CCD 15 and size detection CCD 16 to determine whether it is qualified. If it is not qualified, an NG label needs to be affixed to the corresponding slot. Finally, the winding device 20 winds up the electrode sheet.

[0044] Example 4, the layout of the multifunctional laser cleaning equipment is as follows: Figure 1 As shown, the front physical cleaning mechanism includes a front spraying and scraping assembly 25; the back physical cleaning mechanism includes a back spraying and scraping assembly 26.

[0045] In this embodiment, refer to Figures 5-7During electrode cleaning, the drive unit 6 positions the "cleaning area" slot on the front of the electrode to the front laser cleaning mechanism 5. Then, the laser removes most of the coating (thickness T2) on the front of the slot area, leaving only a small amount of coating thickness T1 (slot status as "after laser cleaning"). At this time, the laser will not damage the foil (thickness H). Then, the conveyor belt continues to move, and the drive unit 6 positions the "after laser cleaning" slot to the front spray cleaning assembly 25. The spray valve 302 in the front spray cleaning assembly 25 sprays cleaning fluid onto the slot, and then the scraper 304 in the front spray cleaning assembly 25 scrapes off the residual layer of thickness T1 in the slot (slot status as "after physical wiping"). Similarly, the laser cleaning and liquid spraying cleaning methods for the grooves on the reverse side of the electrode are performed in the same way as the front side. After both sides have been cleaned and wiped, the electrode is fed by the belt and the groove is positioned by the drive device 6 to the defect detection CCD 15 and the size detection CCD 16 to determine whether it is qualified. If it is not qualified, the corresponding groove needs to be labeled with an NG label. Finally, the winding device 20 winds up the electrode.

[0046] In the above embodiments, refer to 8 and Figure 9 The brush assembly includes a brush 102, a brush R-axis module 107, a brush X-axis module 104, a brush Y-axis module 105, a brush Z-axis module 106, and a first adsorption platform 101. The first adsorption platform 101 is used to adsorb and fix the electrode. The brush X-axis module 104 drives the brush 102 to move along the X-axis direction, the brush Y-axis module 105 drives the brush 102 to move along the Y-axis direction, and the brush Z-axis module 106 drives the brush 102 to move along the Z-axis direction, thereby adjusting the position of the brush 102 to correspond to the area of ​​the electrode to be cleaned. The brush R-axis module 107 (using a servo motor) drives the brush 102 to rotate to clean the residual coating in the area of ​​the electrode to be cleaned.

[0047] Furthermore, the brush assembly also includes a dust suction hood 103, the opening of which is positioned directly opposite the brush 102. The dust suction hood 103 is connected to a vacuum cleaner via a suction pipe and is used to suck up dust generated when the brush 102 cleans the residual coating in the area to be cleaned of the electrode sheet.

[0048] In the above embodiments, reference 10 and Figure 11The nonwoven fabric wiping assembly includes a nonwoven fabric 210, a nonwoven fabric take-up and unwrap structure, a wiping roller 209, a wiping roller lateral movement module 204, and a second adsorption platform 201. The second adsorption platform 201 is used to adsorb and fix the electrode sheet. The nonwoven fabric take-up and unwrap structure includes a nonwoven fabric unwrap structure 202 and a nonwoven fabric take-up structure 203, which are used for taking up and unwrapping the nonwoven fabric 210, respectively. The wiping roller 209 is used to support the nonwoven fabric 210. The wiping roller lateral movement module 204 (using a cylinder) drives the wiping roller 209 to move so that the nonwoven fabric 210 contacts the electrode sheet area to be cleaned. When the nonwoven fabric 210 is running, it wipes and cleans the residual coating in the electrode sheet area to be cleaned.

[0049] Furthermore, the nonwoven fabric wiping assembly also includes a mounting plate 208, a nonwoven fabric X-axis module 207, a nonwoven fabric Y-axis module 205, and a nonwoven fabric Z-axis module 206. The nonwoven fabric winding and unwinding structure, the wiping roller 209, and the wiping roller lateral movement module 204 are mounted on the mounting plate 208. The nonwoven fabric X-axis module 207 drives the mounting plate 208 to move along the X-axis direction, the nonwoven fabric Y-axis module 205 drives the mounting plate 208 to move along the Y-axis direction, and the nonwoven fabric Z-axis module 206 drives the mounting plate 208 to move along the Z-axis direction, thereby realizing the adjustment of the position of the wiping roller 209, so that the wiping roller 209 can quickly correspond to the wiping position of the electrode area to be cleaned.

[0050] In the above embodiments, referring to Figure 12 The liquid spraying and scraping assembly includes a spray valve 302, a scraper 304, a scraper Z-axis module 306, a liquid spraying and scraping X-axis module 308, a liquid spraying and scraping Y-axis module 307, and a third adsorption platform 301. The third adsorption platform 301 is used to adsorb and fix the electrode sheet. The scraper 304 and the spray valve 302 are mounted on both sides of a connecting plate 303. The scraper Z-axis module 306 (using a cylinder) is mounted on the connecting plate 303 and drives the scraper 304 to move along the Z-axis direction. The liquid spraying and scraping X-axis module 308 drives the connecting plate 303 to move along the X-axis direction. The liquid spraying and scraping Y-axis module 307 drives the connecting plate 303 to move along the Y-axis direction, thereby causing the spray valve 302 and the scraper 304 to quickly correspond to the wiping position of the electrode sheet to be cleaned.

[0051] Furthermore, a pressure sensor 305 is provided between the scraper 304 and the scraper Z-axis module 306. The pressure sensor 305 detects the pressure of the scraper 304 on the electrode and adjusts the control in real time to prevent the scraper 304 from damaging the electrode.

[0052] In the above embodiments, the brush X-axis module 104, brush Y-axis module 105, brush Z-axis module 106, non-woven fabric X-axis module 207, non-woven fabric Y-axis module 205, non-woven fabric Z-axis module 206, liquid spraying and scraping X-axis module 308, and liquid spraying and scraping Y-axis module 307 can all be linear modules such as linear motors and cylinders, and the first adsorption platform 101, the second adsorption platform 201, and the third adsorption platform 301 are all vacuum adsorption platforms.

[0053] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A multifunctional laser cleaning apparatus, characterized by: The physical cleaning mechanism is arranged between the positive surface laser cleaning mechanism and the deviation rectifying mechanism and between the reverse surface laser cleaning mechanism and the winding device.

2. The multifunctional laser cleaning apparatus according to claim 1, characterized in that: The physical cleaning mechanism comprises a brush assembly, a non-woven fabric wiping assembly or a liquid spraying and scraping assembly.

3. The multi-functional laser cleaning apparatus according to claim 2, wherein: The brush assembly comprises a brush, a brush R-axis module, a brush X-axis module, a brush Y-axis module, a brush Z-axis module and a first suction platform.

4. The multi-functional laser cleaning apparatus according to claim 3, wherein: The brush assembly further comprises a dust suction cover arranged opposite to the brush for sucking dust generated by the brush when cleaning the residual coating of the polar piece.

5. The multi-functional laser cleaning apparatus according to claim 2, wherein: The non-woven fabric wiping assembly comprises a non-woven fabric, a non-woven fabric winding and unwinding structure, a wiping roller, a wiping roller transverse movement module and a second suction platform.

6. The multi-functional laser cleaning apparatus according to claim 5, wherein: The non-woven fabric wiping assembly further comprises a mounting plate and a non-woven fabric X-axis module, a non-woven fabric Y-axis module and a non-woven fabric Z-axis module for driving the mounting plate to move along the X, Y and Z axes respectively.

7. The multi-functional laser cleaning apparatus according to claim 2, wherein: The liquid spraying and scraping assembly comprises a spraying valve, a scraper, a scraper Z-axis module, a liquid spraying and scraping X-axis module, a liquid spraying and scraping Y-axis module and a third suction platform.

8. The multi-functional laser cleaning apparatus according to claim 7, wherein: A pressure sensor is arranged between the scraper and the scraper Z-axis module.

9. The multi-functional laser cleaning apparatus according to claim 2, wherein: The physical cleaning mechanism between the positive surface laser cleaning mechanism and the deviation rectifying mechanism is a positive surface physical cleaning mechanism. The positive surface physical cleaning mechanism comprises one liquid spraying and scraping assembly, or two brush assemblies, or two non-woven fabric wiping assemblies, or one brush assembly and one non-woven fabric wiping assembly.

10. The multi-functional laser cleaning apparatus according to claim 2, wherein: The physical cleaning mechanism between the reverse laser cleaning mechanism and the winding device is a reverse physical cleaning mechanism, the reverse physical cleaning mechanism includes a liquid spraying and scraping cleaning assembly, or the reverse physical cleaning mechanism includes two brush assemblies, or the reverse physical cleaning mechanism includes two non-woven fabric wiping assemblies, or the reverse physical cleaning mechanism includes a brush assembly and a non-woven fabric wiping assembly.

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