Laser etching machine

Abstract

The invention relates to a laser etching machine which comprises an unwinding device, an etching device, a dust removal device, a 3D detection device, a CCD detection device, a defective labeling device and a winding device, the unwinding device unwinds a pole piece and removes dust and impurities on the surface of the pole piece, the etching device conducts etching treatment on the surface of the pole piece so that etching wire grooves can be formed in the two end faces of the pole piece, and the winding device is connected with the 3D detection device and the CCD detection device. The dust removal device removes residues on the pole piece, the 3D detection device detects the depth and width of an etching wire groove, the CCD detection device detects the appearance of the pole piece, the defective labeling device labels the detected defective pole piece, and the winding device removes dust and impurities on the surface of the pole piece and then winds the pole piece. According to the laser etching machine, the etching wire groove is formed in the positive pole piece, so that the electrolyte infiltration performance of the surface of the positive pole piece is improved, the electrolyte permeation efficiency of the lithium battery is improved, the distribution consistency of the electrolyte in the positive pole piece is improved, and the development of the capacity of the lithium battery and the prolonging of the cycle life are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery production, and in particular to a laser etcher. Background Art

[0002] Lithium-ion batteries have attracted widespread attention due to their high energy density, long service life, light weight, and environmental friendliness. They are widely used in various products such as mobile phones, laptops, digital cameras, electric vehicles, power tools, and new energy vehicles. The injection process of lithium-ion batteries was initially carried out manually in a glove box or a drying box, and the injection efficiency and absorption efficiency of this method were extremely slow. With the development of technology, lithium-ion battery vacuum injection machines and vacuum and positive pressure cycle injection machines appeared later. The above injection methods can greatly improve the injection efficiency and production capacity of small-capacity batteries such as mobile phone batteries and laptop batteries.

[0003] However, with the development of modern society and the energy crisis and environmental protection issues faced by mankind, people have begun to apply lithium-ion batteries to the automotive industry, using lithium-ion power batteries to provide driving force for automobiles, achieving zero emissions and zero pollution. The application of lithium-ion power batteries in the automotive industry has led people to have higher requirements for battery capacity and its capacity consistency. Therefore, the low injection efficiency and absorption speed have once again become a major production bottleneck in the lithium-ion power battery manufacturing industry, especially for lithium-ion power batteries with nano-lithium iron phosphate as the positive electrode system. Due to the dense and smooth surface of its positive electrode sheet, the infiltration and absorption of the electrolyte are very slow, which greatly affects the production efficiency and the distribution of the electrolyte inside the battery. The electrolyte is unevenly distributed inside the battery electrode, which has a great impact on the battery capacity and its capacity consistency. Summary of the invention

[0004] The main purpose of the present invention is to provide a laser etcher to solve the above-mentioned technical problems, to etch the positive electrode plate to form an etching groove, thereby improving the uniformity of the electrolyte distribution inside the battery and ensuring the consistency of the battery capacity.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A laser etching machine includes an unwinding device, an etching device, a dust removal device, a 3D detection device, a CCD detection device, a bad labeling device and a winding device. The unwinding device unwinds a pole piece and removes dust and impurities from the surface of the pole piece. The etching device etches the surface of the pole piece to form etching grooves at both end faces of the pole piece. The dust removal device removes residues on the pole piece. The 3D detection device detects the depth and width of the etching grooves. The CCD detection device detects the appearance of the pole piece and etching pinholes. The bad labeling device labels the bad pole piece detected by the 3D detection device and the CCD detection device. The winding device removes dust and impurities from the surface of the pole piece and then winds it up.

[0007] As a preferred technical solution, the unwinding device includes a pole piece unwinding mechanism, a first tape connection platform mechanism, a first brush dust removal mechanism, a first iron removal mechanism and a first tension mechanism. The pole piece unwinding mechanism corrects the pole piece after unwinding, the first tape connection platform mechanism connects the pole piece after the reel is changed, the first brush dust removal mechanism removes dust from the two end surfaces of the pole piece, the first iron removal mechanism removes iron impurities from the two end surfaces of the pole piece, and the first tension mechanism performs tension detection and tension control.

[0008] As a preferred technical solution, the etching device includes a correction mechanism, two laser etching mechanisms and a second tape splicing platform mechanism. The correction mechanism corrects the pole piece, and the two laser etching mechanisms respectively etches the two end surfaces of the pole piece to form etched line grooves on the two end surfaces of the pole piece in an orderly manner. The second tape splicing platform mechanism splices the pole piece if it is broken.

[0009] As a preferred technical solution, the laser etching mechanism includes a laser assembly, an etching support roller and a dust removal assembly, the dust removal assembly is aligned with the etching support roller, and the laser assembly etches the pole piece located on the etching support roller.

[0010] As a preferred technical solution, the dust removal device includes a first ultrasonic dust removal mechanism, a second ultrasonic dust removal mechanism, a first traction mechanism and a third ultrasonic dust removal mechanism. The first ultrasonic dust removal mechanism and the second ultrasonic dust removal mechanism perform ultrasonic dust removal on the two end surfaces of the pole piece respectively, the first traction mechanism pulls the pole piece to move and rolls the pole piece, and the third ultrasonic dust removal mechanism performs ultrasonic dust removal on the pole piece again.

[0011] As a preferred technical solution, the 3D detection device includes a first cache mechanism, a 3D detection mechanism, a second traction mechanism and a second cache mechanism. The first cache mechanism caches the pole piece before detection, the 3D detection mechanism performs random inspections on the depth and width of the etched groove, the second traction mechanism pulls the pole piece to move, and the second cache mechanism caches the pole piece after detection.

[0012] As a preferred technical solution, the 3D detection mechanism includes a detection drive structure, a line spectrum 3D sensor and a fine-tuning structure. The fine-tuning structure is installed on one side of the detection drive structure. The detection drive structure drives the line spectrum 3D sensor to move, and the line spectrum 3D sensor detects the pole piece.

[0013] As a preferred technical solution, the CCD detection device includes a second brush dust removal mechanism, a third traction mechanism and a CCD detection mechanism. The second brush dust removal mechanism removes dust from the two end surfaces of the pole piece, the third traction mechanism pulls the pole piece to move, and the CCD detection mechanism detects the appearance of the pole piece and etching pinholes.

[0014] As a preferred technical solution, the defective labeling device includes a third cache mechanism, a defective labeling mechanism and a fourth traction mechanism. The third cache mechanism caches the pole piece before labeling, the defective labeling mechanism labels the pole piece detected as defective by the 3D detection device and the CCD detection device, and the fourth traction mechanism pulls the pole piece to move.

[0015] As a preferred technical solution, the winding device includes a second tension mechanism, a second iron removal mechanism, a fourth ultrasonic mechanism and a pole piece winding mechanism. The second tension mechanism performs tension detection and tension control, the second iron removal mechanism removes iron impurities from both end surfaces of the pole piece, the fourth ultrasonic mechanism performs ultrasonic dust removal on the two end surfaces of the pole piece before winding, and the pole piece winding mechanism winds up the pole piece after dust removal.

[0016] The laser etching machine according to the present invention has the following beneficial effects:

[0017] 1. The electrolyte distribution in the finished product is consistent. By forming etching grooves on the positive electrode sheet, the wettability of the positive electrode sheet surface to the electrolyte is improved, the electrolyte penetration efficiency of the lithium battery is improved, and the consistency of the electrolyte distribution in the positive electrode sheet is improved, which is beneficial to the performance of the lithium battery capacity and the improvement of the cycle life;

[0018] 2. High etching efficiency, the galvanometer adopts high-speed galvanometer, the etching efficiency is ≥25m / min, high production efficiency and good stability;

[0019] 3. Strong dust removal effect, using eight positive and negative ultrasonic dust removal mechanisms, four iron removal mechanisms and two brush dust removal mechanisms, the dust removal capacity for foreign matter with a particle size of 3μm-5μm and above is greater than 99.5%, and the dust removal capacity for foreign matter with a particle size of 0.5μm-3μm is greater than 98%;

[0020] 4. Strong compatibility, compatible with edge blanking process and through etching process;

[0021] 5. Degree of automation: No manual operation is required during the electrode reel replacement process, which can reduce the risk of manual operation errors and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a laser etching machine according to Example 1 of the present invention;

[0023] Figure 2 It is a schematic diagram of a pole piece etched by using an edge blanking process according to Example 1 of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the laser etching mechanism according to Example 1 of the present invention;

[0025] Figure 4 This is a working schematic diagram of the laser etching mechanism according to Example 1 of the present invention;

[0026] Figure 5 It is a side view of the first ultrasonic dust removal mechanism according to Example 1 of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the first ultrasonic dust removal mechanism according to Example 1 of the present invention;

[0028] Figure 7 It is a side view of the 3D detection mechanism according to Embodiment 1 of the present invention;

[0029] Figure 8 It is a structural schematic diagram of a 3D detection mechanism according to Embodiment 1 of the present invention;

[0030] Fig. 9 A schematic diagram of a pole piece etched by a through-etching process according to Embodiment 2 of the present invention;

[0031] Fig.10 A side view of the laser etching mechanism according to Embodiment 2 of the present invention;

[0032] Fig.11 This is a schematic diagram of the operation of the laser etching mechanism according to Example 2 of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] [Example 1]

[0035] like Figure 1 and Figure 2 As shown, a laser etching machine includes an unwinding device 1, an etching device 2, a dust removal device 3, a 3D detection device 4, a CCD detection device 5, a bad labeling device 6 and a winding device 7. In this embodiment, the etching device 2 adopts an edge blanking process, the unwinding device 1 unwinds the electrode and removes dust and impurities from the surface of the electrode, the etching device 2 etches the surface of the electrode to form etching grooves on both end faces of the electrode, and the etching grooves do not extend to the edges of the electrode, that is, the edges of the electrode are left blank, the dust removal device 3 removes residues on the electrode, the 3D detection device 4 detects the depth and width of the etching grooves, the CCD detection device 5 detects the appearance of the electrode and the etching pinholes, the bad labeling device 6 labels the bad electrode detected by the 3D detection device and the CCD detection device, and the winding device 7 removes dust and impurities from the surface of the electrode and then rewinds.

[0036] The unwinding device 1 includes a pole piece unwinding mechanism 11, a first tape connection platform mechanism 12, a first brush dust removal mechanism 13, a first iron removal mechanism 14 and a first tension mechanism 15. The pole piece unwinding mechanism 11 corrects the pole piece after unwinding, the first tape connection platform mechanism 12 connects the pole piece after the reel is changed, the first brush dust removal mechanism 13 removes dust from the two end surfaces of the pole piece, two first iron removal mechanisms 14 are provided, and the two first iron removal mechanisms 14 remove iron impurities from the two end surfaces of the pole piece respectively, the first tension mechanism 15 performs tension detection and tension control, and the first tension mechanism 15 includes a first tension detector 151 and a first tension regulator 152, the first tension detector 151 detects the tension of the pole piece, and the first tension regulator 152 adjusts the tension of the pole piece.

[0037] Please combine Figure 3 and Figure 4 As shown, the etching device 2 includes a correction mechanism 21, two laser etching mechanisms 22 and a second tape splicing platform mechanism 23. The correction mechanism 21 corrects the pole piece, and the two laser etching mechanisms 22 respectively etches the two end surfaces of the pole piece to form etched line grooves on the two end surfaces of the pole piece in an orderly manner. The second tape splicing platform mechanism 23 splices the pole piece if it is broken.

[0038] The laser etching mechanism 22 includes a laser assembly 221, an etching bracket 224, an etching support roller 222 and a dust removal assembly 223. The etching support roller 222 is installed on the etching bracket 224. The laser assembly 221 and the dust removal assembly 223 are respectively aligned with the etching support roller 222. The laser assembly 221 etches the pole piece located on the etching support roller 222. The dust removal assembly 223 absorbs the dust generated by etching. In this embodiment, the etching support roller 222 adopts a large roller.

[0039] The laser assembly 221 includes a laser 2211, a galvanometer structure 2212 and a field lens structure 2213. The laser 2211 emits a light beam to the galvanometer structure 2212. The galvanometer structure 2212 is periodically offset to form an offset light beam. The offset light beam etches the surface of the pole piece after passing through the field lens structure 2213. The galvanometer structure 2212 includes a galvanometer 2214, a focal length adjustment structure 2215 and a width adjustment structure 2216. The width adjustment structure 2216 drives the focal length adjustment structure 2215 to move, thereby adjusting the etching width of the laser 2211. The focal length adjustment structure 2215 drives the galvanometer 2214 to move, thereby adjusting the focal length of the laser etching. In this embodiment, the focal length adjustment structure 2215 and the width adjustment structure 2216 are motor-driven screw active modules. The galvanometer 2214 adopts a high-speed galvanometer with an etching efficiency of ≥25m / min, high production efficiency and good stability.

[0040] The dust removal assembly 223 includes a dust removal bracket 2234, a dust removal driving cylinder 2231, a dust removal guide rail 2233 and a dust collector 2232. The dust removal driving cylinder 2231 and the dust removal guide rail 2233 are installed on the dust removal bracket 2234. The dust removal driving cylinder 2231 drives the dust collector 2232 to move along the dust removal guide rail 2233. The dust collector 2232 generates negative pressure to absorb impurities generated by etching.

[0041] The dust removal device 3 includes a first ultrasonic dust removal mechanism 31, a second ultrasonic dust removal mechanism 32, a first traction mechanism 33 and a third ultrasonic dust removal mechanism 34. The first ultrasonic dust removal mechanism 31, the second ultrasonic dust removal mechanism 32 and the third ultrasonic dust removal mechanism 34 are respectively provided with two. The first ultrasonic dust removal mechanism 31 and the second ultrasonic dust removal mechanism 32 perform ultrasonic dust removal on the two end surfaces of the pole piece respectively, the first traction mechanism 33 pulls the pole piece to move and rolls the pole piece, and the third ultrasonic dust removal mechanism 34 performs ultrasonic dust removal on the pole piece again. A total of eight ultrasonic dust removal mechanisms are used for dust removal, and the foreign matter removal ability is strong. The dust removal ability for foreign matters with a particle size of 3μm-5μm and above is greater than 99.5%, and the dust removal ability for foreign matters with a particle size of 0.5μm-3μm is greater than 98%.

[0042] Please combine Figure 5 and Figure 6As shown, the structures of the first ultrasonic dust removal mechanism 31, the second ultrasonic dust removal mechanism 32 and the third ultrasonic dust removal mechanism 34 are the same. In this embodiment, in order to avoid redundancy, the first ultrasonic dust removal mechanism 31 is taken as an example for explanation. The first ultrasonic dust removal mechanism 31 includes a dust removal bracket 311, a dust removal driving cylinder 312, a dust removal mounting seat 313, a dust removal guide rail 314, a dust removal slider 315 and a dust collector 316. The dust collector 316 is fixedly arranged on one end surface of the dust removal mounting seat 313, the dust removal guide rail 314 is fixedly arranged on the other end surface of the dust removal mounting seat 313, the dust removal slider 315 and the dust removal driving cylinder 312 are fixedly arranged on the dust removal bracket 311, the dust removal slider 315 moves along the dust removal guide rail 314, and the dust removal driving cylinder 312 drives the dust removal mounting seat 313 to move relative to the dust removal slider 315 to drive the dust collector 316 to approach the pole piece, thereby performing ultrasonic dust removal on the pole piece.

[0043] The 3D detection device 4 includes a first cache mechanism 41, a 3D detection mechanism 42, a second traction mechanism 43 and a second cache mechanism 44. The first cache mechanism 41 caches the electrode before detection, the 3D detection mechanism 42 performs random inspections on the depth and width of the etched groove, the second traction mechanism 43 tractions the electrode to move, and the second cache mechanism 44 caches the electrode after detection.

[0044] Please combine Figure 7 and Figure 8 As shown, the 3D detection mechanism 42 includes a detection drive structure 421, a line spectrum 3D sensor 422 and a fine-tuning structure 423. The fine-tuning structure 423 is installed on one side of the detection drive structure 421. The detection drive structure 421 drives the line spectrum 3D sensor 422 to move back and forth, and the line spectrum 3D sensor 422 detects the pole piece. In this embodiment, the detection drive structure 421 is a motor-driven screw active module. The fine-tuning structure 423 can adjust the line spectrum 3D sensor 422 to detect its actual position. During detection, the pole piece stops at the detection position. The detection drive structure 421 drives the line spectrum 3D sensor 422 to move back and forth along the width direction. The line spectrum 3D sensor 422 detects the pole piece to detect the depth and width of the etched groove, and feeds back defective products to the defective labeling device 6.

[0045] The CCD detection device 5 includes a second brush dust removal mechanism 51, a third traction mechanism 52 and a CCD detection mechanism 53. The second brush dust removal mechanism 51 removes dust from the two end surfaces of the electrode, the third traction mechanism 52 pulls the electrode to move, and the CCD detection mechanism 53 detects the appearance of the electrode and the etching pinholes, and feeds back the defective products to the defective labeling device 6.

[0046] The defective labeling device 6 includes a third cache mechanism 61, a defective labeling mechanism 62 and a fourth traction mechanism 63. The third cache mechanism 61 caches the pole piece before labeling, the defective labeling mechanism 62 statically labels the pole piece detected as defective by the 3D detection device 4 and the CCD detection device 5, and the fourth traction mechanism 63 pulls the pole piece to move.

[0047] The winding device 7 includes a second tension mechanism 71, a second iron removal mechanism 72, a fourth ultrasonic mechanism 73 and a pole piece winding mechanism 74. The second tension mechanism 71 performs tension detection and tension control. Two second iron removal mechanisms 72 and two fourth ultrasonic mechanisms 73 are respectively provided. The two second iron removal mechanisms 72 remove iron impurities from the two end surfaces of the pole piece. The two fourth ultrasonic mechanisms 73 perform ultrasonic dust removal on the two end surfaces of the pole piece before winding. The pole piece winding mechanism 74 winds up the pole piece after dust removal.

[0048] [Example 2]

[0049] like Figure 1 and Fig. 9 As shown, a laser etching machine includes an unwinding device 1, an etching device 2, a dust removal device 3, a 3D detection device 4, a CCD detection device 5, a bad labeling device 6 and a winding device 7. In this embodiment, the etching device 2 adopts a through etching process, the unwinding device 1 unwinds the electrode and removes dust and impurities from the surface of the electrode, the etching device 2 etches the surface of the electrode to form etching grooves on both end faces of the electrode, and the etching grooves cross the width of the electrode, that is, no blank space is left on the edge of the electrode, the dust removal device 3 removes residues on the electrode, the 3D detection device 4 detects the depth and width of the etching grooves, the CCD detection device 5 detects the appearance of the electrode and the etching pinholes, the bad labeling device 6 labels the bad electrode detected by the 3D detection device and the CCD detection device, and the winding device 7 removes dust and impurities from the surface of the electrode and then rewinds.

[0050] The unwinding device 1 includes a pole piece unwinding mechanism 11, a first tape connection platform mechanism 12, a first brush dust removal mechanism 13, a first iron removal mechanism 14 and a first tension mechanism 15. The pole piece unwinding mechanism 11 corrects the pole piece after unwinding, the first tape connection platform mechanism 12 connects the pole piece after the reel is changed, the first brush dust removal mechanism 13 removes dust from the two end surfaces of the pole piece, two first iron removal mechanisms 14 are provided, and the two first iron removal mechanisms 14 remove iron impurities from the two end surfaces of the pole piece respectively, the first tension mechanism 15 performs tension detection and tension control, and the first tension mechanism 15 includes a first tension detector 151 and a first tension regulator 152, the first tension detector 151 detects the tension of the pole piece, and the first tension regulator 152 adjusts the tension of the pole piece.

[0051] Please combine Fig.10and Fig.11 As shown, the etching device 2 includes a correction mechanism 21, two laser etching mechanisms 22 and a second tape splicing platform mechanism 23. The correction mechanism 21 corrects the pole piece, and the two laser etching mechanisms 22 respectively etches the two end surfaces of the pole piece to form etched line grooves on the two end surfaces of the pole piece in an orderly manner. The second tape splicing platform mechanism 23 splices the pole piece if it is broken.

[0052] The laser etching mechanism 22 includes a laser assembly 221, an etching bracket 224, an etching support roller 222 and a dust removal assembly 223. Two etching support rollers 222 are installed on the etching bracket 224. The pole piece is transmitted between the two etching support rollers 222. The laser assembly 221 and the dust removal assembly 223 are aligned with the etching support rollers 222 respectively. The laser assembly 221 etches the pole piece on the etching support roller 222. The dust removal assembly 223 absorbs dust generated by etching. In this embodiment, the etching support roller 222 adopts a small roller, and the etching point position is suspended to prevent the laser assembly 221 from damaging the etching support roller 222.

[0053] The laser assembly 221 includes a laser 2211, a galvanometer structure 2212 and a field lens structure 2213. The laser 2211 emits a light beam to the galvanometer structure 2212. The galvanometer structure 2212 performs periodic offset to form an offset light beam. The offset light beam etches the surface of the pole piece after passing through the field lens structure 2213. The galvanometer structure 2212 includes a galvanometer 2214, a focal length adjustment structure 2215 and a width adjustment structure 2216. The width adjustment structure 2216 drives the focal length adjustment structure 2215 to move, thereby adjusting the etching width of the laser 2211. The focal length adjustment structure 2215 drives the galvanometer 2214 to move, thereby adjusting the focal length of the laser etching. In this embodiment, the focal length adjustment structure 2215 and the width adjustment structure 2216 are motor-driven screw active modules.

[0054] The dust removal assembly 223 includes a dust removal bracket 2234, a dust removal driving cylinder 2231, a dust removal guide rail 2233 and a dust collector 2232. The dust removal driving cylinder 2231 and the dust removal guide rail 2233 are installed on the dust removal bracket 2234. The dust removal driving cylinder 2231 drives the dust collector 2232 to move along the dust removal guide rail 2233. The dust collector 2232 generates negative pressure to absorb impurities generated by etching.

[0055] The dust removal device 3 includes a first ultrasonic dust removal mechanism 31, a second ultrasonic dust removal mechanism 32, a first traction mechanism 33 and a third ultrasonic dust removal mechanism 34. The first ultrasonic dust removal mechanism 31, the second ultrasonic dust removal mechanism 32 and the third ultrasonic dust removal mechanism 34 are respectively provided with two. The first ultrasonic dust removal mechanism 31 and the second ultrasonic dust removal mechanism 32 perform ultrasonic dust removal on the two end surfaces of the pole piece respectively, the first traction mechanism 33 pulls the pole piece to move and rolls the pole piece, and the third ultrasonic dust removal mechanism 34 performs ultrasonic dust removal on the pole piece again.

[0056] Please combine Figure 5 and Figure 6 As shown, the structures of the first ultrasonic dust removal mechanism 31, the second ultrasonic dust removal mechanism 32 and the third ultrasonic dust removal mechanism 34 are the same. In this embodiment, in order to avoid redundancy, the first ultrasonic dust removal mechanism 31 is taken as an example for explanation. The first ultrasonic dust removal mechanism 31 includes a dust removal bracket 311, a dust removal driving cylinder 312, a dust removal mounting seat 313, a dust removal guide rail 314, a dust removal slider 315 and a dust collector 316. The dust collector 316 is fixedly arranged on one end surface of the dust removal mounting seat 313, the dust removal guide rail 314 is fixedly arranged on the other end surface of the dust removal mounting seat 313, the dust removal slider 315 and the dust removal driving cylinder 312 are fixedly arranged on the dust removal bracket 311, the dust removal slider 315 moves along the dust removal guide rail 314, and the dust removal driving cylinder 312 drives the dust removal mounting seat 313 to move relative to the dust removal slider 315 to drive the dust collector 316 to approach the pole piece, thereby performing ultrasonic dust removal on the pole piece.

[0057] The 3D detection device 4 includes a first cache mechanism 41, a 3D detection mechanism 42, a second traction mechanism 43 and a second cache mechanism 44. The first cache mechanism 41 caches the electrode before detection, the 3D detection mechanism 42 performs random inspections on the depth and width of the etched groove, the second traction mechanism 43 tractions the electrode to move, and the second cache mechanism 44 caches the electrode after detection.

[0058] Please combine Figure 7 and Figure 8As shown, the 3D detection mechanism 42 includes a detection drive structure 421, a line spectrum 3D sensor 422 and a fine-tuning structure 423. The fine-tuning structure 423 is installed on one side of the detection drive structure 421. The detection drive structure 421 drives the line spectrum 3D sensor 422 to move back and forth, and the line spectrum 3D sensor 422 detects the pole piece. In this embodiment, the detection drive structure 421 is a motor-driven screw active module. The fine-tuning structure 423 can adjust the line spectrum 3D sensor 422 to detect its actual position. During detection, the pole piece stops at the detection position. The detection drive structure 421 drives the line spectrum 3D sensor 422 to move back and forth along the width direction. The line spectrum 3D sensor 422 detects the pole piece to detect the depth and width of the etched groove, and feeds back defective products to the defective labeling device 6.

[0059] The CCD detection device 5 includes a second brush dust removal mechanism 51, a third traction mechanism 52 and a CCD detection mechanism 53. The second brush dust removal mechanism 51 removes dust from the two end surfaces of the electrode, the third traction mechanism 52 pulls the electrode to move, and the CCD detection mechanism 53 detects the appearance of the electrode and the etching pinholes, and feeds back the defective products to the defective labeling device 6.

[0060] The defective labeling device 6 includes a third cache mechanism 61, a defective labeling mechanism 62 and a fourth traction mechanism 63. The third cache mechanism 61 caches the pole piece before labeling, the defective labeling mechanism 62 statically labels the pole piece detected as defective by the 3D detection device 4 and the CCD detection device 5, and the fourth traction mechanism 63 pulls the pole piece to move.

[0061] The winding device 7 includes a second tension mechanism 71, a second iron removal mechanism 72, a fourth ultrasonic mechanism 73 and a pole piece winding mechanism 74. The second tension mechanism 71 performs tension detection and tension control. Two second iron removal mechanisms 72 and two fourth ultrasonic mechanisms 73 are respectively provided. The two second iron removal mechanisms 72 remove iron impurities from the two end surfaces of the pole piece. The two fourth ultrasonic mechanisms 73 perform ultrasonic dust removal on the two end surfaces of the pole piece before winding. The pole piece winding mechanism 74 winds up the pole piece after dust removal.

[0062] The above-described embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A laser etching machine, characterized in that: The invention comprises an unwinding device, an etching device, a dust removing device, a 3D detection device, a CCD detection device, a bad labeling device and a winding device. The unwinding device unwinds the pole piece and removes dust and impurities from the surface of the pole piece. The etching device etches the surface of the pole piece to form etching grooves at both end faces of the pole piece. The dust removing device removes residues on the pole piece. The 3D detection device detects the depth and width of the etching grooves. The CCD detection device detects the appearance of the pole piece and etching pinholes. The bad labeling device labels the bad pole piece detected by the 3D detection device and the CCD detection device. The winding device removes dust and impurities from the surface of the pole piece and then winds it up.

2. The laser etching machine according to claim 1, characterized in that: The unwinding device includes a pole piece unwinding mechanism, a first tape connection platform mechanism, a first brush dust removal mechanism, a first iron removal mechanism and a first tension mechanism. The pole piece unwinding mechanism corrects the pole piece after unwinding, the first tape connection platform mechanism connects the pole piece after the reel is changed, the first brush dust removal mechanism removes dust from the two end surfaces of the pole piece, the first iron removal mechanism removes iron impurities from the two end surfaces of the pole piece, and the first tension mechanism performs tension detection and tension control.

3. The laser etching machine according to claim 1, characterized in that: The etching device includes a correction mechanism, two laser etching mechanisms and a second tape-joining platform mechanism. The correction mechanism corrects the pole piece, and the two laser etching mechanisms respectively etches the two end surfaces of the pole piece to form etched line grooves on the two end surfaces of the pole piece in an orderly manner. The second tape-joining platform mechanism performs tape-joining processing on the broken tape of the pole piece.

4. The laser etching machine according to claim 3, characterized in that: The laser etching mechanism includes a laser assembly, an etching support roller and a dust removal assembly. The dust removal assembly is aligned with the etching support roller. The laser assembly etches the pole piece located on the etching support roller.

5. The laser etching machine according to claim 1, characterized in that: The dust removal device includes a first ultrasonic dust removal mechanism, a second ultrasonic dust removal mechanism, a first traction mechanism and a third ultrasonic dust removal mechanism. The first ultrasonic dust removal mechanism and the second ultrasonic dust removal mechanism perform ultrasonic dust removal on the two end surfaces of the pole piece respectively. The first traction mechanism pulls the pole piece to move and rolls the pole piece, and the third ultrasonic dust removal mechanism performs ultrasonic dust removal on the pole piece again.

6. The laser etching machine according to claim 1, characterized in that: The 3D detection device includes a first cache mechanism, a 3D detection mechanism, a second traction mechanism and a second cache mechanism. The first cache mechanism caches the pole piece before detection. The 3D detection mechanism performs random inspections on the depth and width of the etched groove. The second traction mechanism pulls the pole piece to move. The second cache mechanism caches the pole piece after detection.

7. The laser etching machine according to claim 6, characterized in that: The 3D detection mechanism includes a detection drive structure, a line spectrum 3D sensor and a fine-tuning structure. The fine-tuning structure is installed on one side of the detection drive structure. The detection drive structure drives the line spectrum 3D sensor to move, and the line spectrum 3D sensor detects the pole piece.

8. The laser etching machine according to claim 1, characterized in that: The CCD detection device includes a second brush dust removal mechanism, a third traction mechanism and a CCD detection mechanism. The second brush dust removal mechanism removes dust from the two end surfaces of the pole piece, the third traction mechanism pulls the pole piece to move, and the CCD detection mechanism detects the appearance of the pole piece and etching pinholes.

9. The laser etching machine according to claim 1, characterized in that: The defective labeling device includes a third cache mechanism, a defective labeling mechanism and a fourth traction mechanism. The third cache mechanism caches the pole pieces before labeling. The defective labeling mechanism labels the pole pieces detected as defective by the 3D detection device and the CCD detection device. The fourth traction mechanism pulls the pole pieces to move.

10. The laser etching machine according to claim 1, characterized in that: The winding device includes a second tension mechanism, a second iron removal mechanism, a fourth ultrasonic mechanism and a pole piece winding mechanism. The second tension mechanism performs tension detection and tension control. The second iron removal mechanism removes iron impurities from both end surfaces of the pole piece. The fourth ultrasonic mechanism performs ultrasonic dust removal on the two end surfaces of the pole piece before winding. The pole piece winding mechanism winds up the pole piece after dust removal.

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