Laser etching mechanism for pole piece

Abstract

The utility model provides a laser etching mechanism for pole piece, including at least two etching units, correspond to the two side surface of pole piece material belt, each etching unit includes the etching assembly and the tape walking assembly that are arranged correspondingly, the tape walking assembly includes two tensioning inner rollers and two tensioning outer rollers, the two tensioning inner rollers are located between the two tensioning outer rollers, the two tensioning inner rollers are located between the two tensioning outer rollers, and the two tensioning outer rollers are located between the two tensioning outer rollers. The pole piece material belt penetrates through a gap between the outer tensioning roller and the adjacent inner tensioning roller and stretches across the two inner tensioning rollers, and the laser beam focus of the etching assembly corresponds to the area between the two inner tensioning rollers. The tensioning inner roller is matched with the tensioning outer roller, so that the pole piece material belt is kept in a tensioning state and operates stably, the shaking of the material belt is effectively prevented, the consistency of the distance between a laser focus and the pole piece material belt is ensured, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a kind of laser etching mechanism for pole piece. BACKGROUND

[0002] In order to improve the charge-discharge performance of battery, the prior art is mostly through the way of grooving or punching on the surface of pole piece to increase the contact area of pole piece and electrolyte, so as to effectively improve the embedding and extraction efficiency of lithium ion on the pole piece, and thus improve the charge-discharge performance of battery. Laser etching is mostly used in production to groove or punch on the surface of pole piece.

[0003] In the laser processing process, the focal length requirement is very high. If the focal length is too far, it will cause defocus. If the focal length is too short, it will cause the heat affected zone to become larger, thereby affecting the product processing quality. The pole piece material roll is a tape roll, and laser processing is performed during operation. Therefore, how to solve the shaking of the material tape during operation is the key to ensuring product quality. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model aims to provide a kind of laser etching mechanism for pole piece, which can keep the pole piece material tape in a tensioned state and run smoothly, effectively prevent the material tape from shaking, and help ensure the consistency of the distance between the laser focal point and the pole piece material tape.

[0005] The embodiments of the utility model are implemented by the following technical solutions:

[0006] A kind of laser etching mechanism for pole piece, including at least two etching units, corresponding to the two side surfaces of pole piece material tape, the etching unit includes correspondingly arranged etching assembly and tape running assembly, the tape running assembly includes two tensioned inner rollers and two tensioned outer rollers, two tensioned inner rollers are between two tensioned outer rollers, the pole piece material tape passes through the gap between tensioned outer roller and the tensioned inner roller adjacent thereto, and is straddled between two tensioned inner rollers, the focal point of laser beam of etching assembly corresponds to the region between two tensioned inner rollers.

[0007] According to a preferred embodiment, the region of pole piece material tape straddling between two tensioned inner rollers is defined as etching region, and the etching region is between the tensioned inner roller and the etching assembly.

[0008] According to a preferred embodiment, the tape running assembly further includes dust removal air knife and dust extraction box. In the conveying direction of pole piece material tape, the dust removal air knife is upstream of the dust extraction box, the air outlet of the dust removal air knife faces the etching region, and the air inlet of the dust extraction box faces the etching region.

[0009] According to a preferred embodiment, the tape running assembly further comprises an inner roller frame and an outer roller frame, the tensioning inner roller is arranged on the inner roller frame, and the outer roller frame is adjustably provided with a closing plate, the tensioning outer roller is arranged on the closing plate, the closing plate is in a rectangular shape, the length direction of the closing plate is parallel to the length direction of the tensioning outer roller, the dust removal air knife is located on one side of the width direction of the closing plate, the dust extraction box is located on the other side of the width direction of the closing plate, the dust removal air knife is located between the closing plate and the tensioning outer roller adjacent to the dust removal air knife, and the dust extraction box is located between the closing plate and the tensioning outer roller adjacent to the dust extraction box; the closing plate is provided with a light transmission hole for passing through the laser beam.

[0010] According to a preferred embodiment, the tape running assembly further comprises an inner roller frame and an outer roller frame, the tensioning inner roller is arranged on the inner roller frame, and the tensioning outer roller is arranged on the outer roller frame, the tensioning inner roller is adjustably arranged and / or the tensioning outer roller is adjustably arranged.

[0011] According to a preferred embodiment, the tensioning inner roller is parallel to the tensioning outer roller.

[0012] According to a preferred embodiment, the etching assembly comprises a frame plate and a galvanometer assembly, and the galvanometer assembly is adjustably arranged on the frame plate.

[0013] According to a preferred embodiment, the galvanometer assembly comprises a second base plate, a first adapter plate, a second adapter plate and a galvanometer head, the second base plate is movable along the width direction of the pole piece tape, the first adapter plate is slidingly mounted on the second base plate, the first adapter plate is movable relative to the second base plate to approach or move away from the etching area, the second adapter plate is slidingly mounted on the first adapter plate, and the galvanometer head is mounted on the second adapter plate; the direction in which the second adapter plate slides relative to the first adapter plate is defined as a first direction, the direction in which the first adapter plate slides relative to the second base plate is defined as a second direction, and the movement direction of the second base plate is defined as a third direction, the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0014] According to a preferred embodiment, the pole piece laser etching mechanism further comprises a deviation correction assembly, the etching unit for processing the first side of the pole piece tape is defined as a first etching group, the etching unit for processing the second side of the pole piece tape is defined as a second etching group, and the deviation correction assembly is arranged upstream of the first etching group and the second etching group.

[0015] According to a preferred embodiment, the pole piece laser etching mechanism further comprises a rack, and the tensioning inner roller and the tensioning outer roller are arranged on the rack and parallel to the ground.

[0016] The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0017] The utility model discloses two tensioning inner rollers have the gap, when the pole piece material belt breaks or is punched in the etching process and so on, the laser beam can go out through the gap between two tensioning inner rollers and will not ablate the tensioning inner roller, simultaneously, the tensioning inner roller cooperates the tensioning outer roller and makes the pole piece material belt keep the tensioned state and the stable operation, effectively prevents the material belt to shake, is favorable to guarantee the consistency of the distance between laser focal point and pole piece material belt, is favorable to improve product quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed in the embodiment, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limited definition, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.

[0019] Figure 1 The structure schematic diagram of the laser etching mechanism for pole piece provided by the embodiment of the utility model is shown in the drawing.

[0020] Figure 2 The first etching group three-dimensional structure schematic diagram provided by the embodiment of the utility model is shown in the drawing.

[0021] Figure 3 The first three-dimensional structure schematic diagram of the tape running assembly provided by the embodiment of the utility model is shown in the drawing.

[0022] Figure 4 The second three-dimensional structure schematic diagram of the tape running assembly provided by the embodiment of the utility model is shown in the drawing.

[0023] Figure 5 The assembly structure schematic diagram of the etching assembly and the tape running assembly provided by the embodiment of the utility model is shown in the drawing.

[0024] Figure 6 The assembly structure schematic diagram of the four galvanometer assemblies provided by the embodiment of the utility model is shown in the drawing.

[0025] Figure 7 The three-dimensional structure schematic diagram of the buffer mechanism provided by the embodiment of the utility model is shown in the drawing.

[0026] Icon: 01, pole piece material belt; 011, first side surface; 012, second side surface; 013, etching area; 1, etching part; 101, first etching group; 102, second etching group; 103, first longitudinal plane; 104, second longitudinal plane; 105, buffering mechanism; 1051, inner vertical plate; 1052, outer vertical plate; 1053, fixed rod; 1054, transmission rotating shaft; 1055, first passing roller; 1056, first moving roller; 1057, third seat plate; 11, etching assembly; 111, frame plate; 112, galvanometer assembly; 1121, galvanometer head; 1122, first adapter plate; 1123, second adapter plate; 1124, second seat plate; 12, belt running assembly; 121, tensioning inner roller; 122, tensioning outer roller; 123, dust removal air knife; 124, dust removal box; 125, inner roller frame; 126, outer roller frame; 1261, first seat plate; 127, closed plate; 1271, light transmission hole; 1272, extension plate; 128, dust removal space; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0027] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application.

[0028] In the description of the present application, it should be pointed out that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application.

[0030] Please refer to Figures 1 to 7The application discloses a laser etching mechanism for pole pieces, which comprises a rack (not shown in the drawings) and at least two etching units arranged on the rack, and the at least two etching units correspond to two side surfaces of a pole piece material belt 01. The laser etching mechanism for pole pieces further comprises a deviation rectifying assembly. The etching unit used for processing a first side surface 011 of the pole piece material belt 01 is defined as a first etching group 101, and the etching unit used for processing a second side surface 012 of the pole piece material belt 01 is defined as a second etching group 102. The deviation rectifying assembly (not shown in the drawings) is arranged upstream of the first etching group 101 and the second etching group 102. In this way, laser etching processing can be simultaneously performed on the two side surfaces of the pole piece material belt 01. Before the pole piece material belt 01 enters the first etching group 101 and the second etching group 102, the pole piece material belt 01 to be processed is rectified by the deviation rectifying assembly. In this way, the pole piece material belt 01 can enter the etching unit area for etching processing in a stable and accurate posture. On this basis, the conveying speed of the pole piece material belt 01 can be improved, and the etching efficiency of the pole piece material belt 01 is improved as a whole.

[0031] In the embodiment, the deviation rectifying assembly can be any existing material belt deviation rectifying mechanism.

[0032] In the embodiment, the rack is in an L shape as a whole. The rollers for carrying the pole piece material belt 01 are arranged on the longitudinal side surface of the rack and are parallel to the ground, that is, the rollers for carrying the pole piece material belt 01 are arranged in a cantilevered manner as a whole. Some rollers are provided with a support structure such as a plate at the cantilevered end to improve the stability of the mechanism. In this way, equipment maintenance and assembly of the pole piece material belt 01 are facilitated.

[0033] In the embodiment, the first etching group 101 and the second etching group 102 are the same in structure. Hereinafter, the first etching group 101 is taken as an example for description.

[0034] Preferably, as shown in Figs. Figure 1 and Figure 2 The first etching group 101 comprises two etching units arranged at intervals along the longitudinal direction. Correspondingly, the pole piece material belt 01 entering the first etching group 101 region travels along the longitudinal direction. In this way, the spatial layout of the etching units in the first etching group 101 is facilitated, and the laser etching mechanism for pole pieces can be more compact in structure, and the floor area occupied by the mechanism is reduced.

[0035] In some embodiments, the etching unit can also be one or more. The position and number of etching units can be reasonably arranged according to actual production efficiency requirements. It can be understood that the more the number of etching units is, the larger the area of the pole piece material belt 01 that can be etched by the first etching group 101 at the same time. This means that the more the number of etching units is, the higher the production efficiency of the first etching group 101 or the laser etching mechanism for pole pieces is.

[0036] In another embodiment, the first etching group 101 and the second etching group 102 can also be different structures, mainly reflected in the number of etching units, for example, the first etching group 101 includes two etching units, the second etching group 102 includes three etching units, etc.

[0037] As shown in Figure 2 , the etching unit includes a corresponding etching assembly 11 and a tape running assembly 12. The pole piece tape 01 is inserted on the tape running assembly 12 and is limited by the tape running assembly 12. The etching assembly 11 is located on one side of the tape running assembly 12, and is used to generate a laser beam to etch the pole piece tape 01 inserted on the tape running assembly 12. Specifically, as shown in Figure 3 、 Figure 4 and Figure 5 , the tape running assembly 12 includes two tensioning inner rollers 121 and two tensioning outer rollers 122. The two tensioning inner rollers 121 are located between the two tensioning outer rollers 122. The pole piece tape 01 passes through the gap between the tensioning outer roller 122 and the tensioning inner roller 121 adjacent thereto, and is transversely arranged between the two tensioning inner rollers 121. The focal point of the laser beam of the etching assembly 11 corresponds to the area between the two tensioning inner rollers 121. In this embodiment, the two tensioning inner rollers 121 have a gap therebetween. The size of the gap is sufficient for the laser beam generated by the etching assembly 11 to pass through without irradiating the tensioning inner rollers 121. In this way, when the pole piece tape 01 is broken or pierced during etching, etc., the laser beam can pass out through the gap between the two tensioning inner rollers 121 without ablation of the tensioning inner rollers 121, thereby ensuring the structural integrity of the tensioning inner rollers and improving the service life of the equipment.

[0038] Preferably, the central axes of the two tensioning outer rollers 122 are located in a first longitudinal plane 103, and the central axes of the two tensioning inner rollers 121 are located in a second longitudinal plane 104. The first longitudinal plane 103 is parallel to the second longitudinal plane 104, that is, the tensioning inner rollers 121 are parallel to the tensioning outer rollers 122. The size of the gap between the first longitudinal plane 103 and the second longitudinal plane 104 can adjust the size of the pole piece tape 01 wrapped around the tensioning inner rollers 121.

[0039] The area of the pole piece tape 01 transversely arranged between the two tensioning inner rollers 121 is defined as an etching area 013, and the etching area 013 is located between the tensioning inner rollers 121 and the etching assembly 11. As shown in Figure 5As shown, the etching area 013 is arranged close to and towards the etching assembly 11. The tensioned inner roller 121 is used to support the etching area 013, and cooperates with the tensioned outer roller 122 to keep the etching area 013 in a tensioned state and run smoothly, effectively preventing the material belt from shaking, so as to ensure that the etching area remains flat during the etching process, which is conducive to ensuring the consistency of the etching depth of the surface of the pole piece material belt 01 and the consistency of the distance between the laser focal point and the etching area 013, and is conducive to improving product quality.

[0040] Further, the tape running assembly 12 further comprises a dust removal air knife 123 and a dust suction box 124. In the conveying direction of the pole piece material belt 01, the dust removal air knife 123 is upstream of the dust suction box 124, the air outlet of the dust removal air knife 123 is towards the etching area 013, and the air inlet of the dust suction box 124 is towards the etching area 013. During the etching process, the dust removal air knife 123 blows air to the etching area 013. Since the dust removal air knife 123 is upstream of the dust suction box 124, the dust generated by the etching area 013 can be blown away from the etching area 013 by the air generated by the dust removal air knife 123, and the dust suction box 124 downstream of the dust removal air knife 123 generates a negative pressure to collect the dust separated from the etching area 013, so as to avoid the dust from escaping.

[0041] Preferably, the angle between the flow direction of the air generated by the air outlet of the dust removal air knife 123 and the conveying direction of the pole piece material belt 01 of the etching area 013 is an acute angle. In this way, the dust can be better blown towards the dust suction box 124 downstream, thereby improving the dust removal efficiency.

[0042] As shown in Figure 3 and Figure 4 The tape running assembly 12 further comprises an inner roller bracket 125 and an outer roller bracket 126. The tensioned inner roller 121 is arranged on the inner roller bracket 125. The outer roller bracket 126 adjustably has a closing plate 127 arranged thereon, and the tensioned outer roller 122 is arranged on the closing plate 127 through an extension plate 1272. The closing plate 127 is in a rectangular shape, the length direction of the closing plate 127 is parallel to the length direction of the tensioned outer roller 122, the dust removal air knife 123 is on one side of the width direction of the closing plate 127, the dust suction box 124 is on the other side of the width direction of the closing plate 127, the dust removal air knife 123 is between the closing plate 127 and the tensioned outer roller 122 adjacent to the dust removal air knife 123, and the dust suction box 124 is between the closing plate 127 and the tensioned outer roller 122 adjacent to the dust suction box 124. The closing plate 127 has a light transmission hole 1271 arranged therethrough for the laser beam to pass through.

[0043] More specifically, as shown in Figure 5As shown, the closed plate 127, the dust removal air knife 123, the dust extraction box 124, the tension outer roller 122 and the pole piece material belt 01 jointly limit a relatively closed dust removal space 128, and the etching area 013 is divided by the etching part 1 and located in the dust removal space 128, so that the dust can be well limited in the dust removal space 128 and extracted by the negative pressure generated by the dust extraction box 124 in the processing and dust removal process, effectively avoiding the problem of dust escaping.

[0044] As shown in Figure 4 As shown, the first seat plate 1261 is slidably installed on the outer roller frame 126, and the first seat plate 1261 can slide relative to the outer roller frame 126 to approach or move away from the inner roller frame 125. The closed plate 127 is installed on the first seat plate 1261, and both ends of the closed plate 127 in the length direction are equipped with extension plates 1272. The tension outer roller 122 is installed on the closed plate 127 through the extension plates 1272. The dust removal air knife 123 and the dust extraction box 124 are both rotatably installed on the closed plate 127 through a rotating shaft. In this way, the angle of the dust removal air knife 123 and the dust extraction box 124 can be adjusted to better adapt to the specific dust removal environment.

[0045] Further, the first seat plate 1261 is slidably assembled with the outer roller frame 126 through a slide rail and slide block assembly. A gas cylinder is arranged on the outer roller frame 126 and acts on the first seat plate 1261 or the closed plate 127, so that the tension outer roller 122 can approach or move away from the tension inner roller 121. In this way, the tension of the pole piece material belt 01 and the etching area 013 can be adjusted.

[0046] In another embodiment, the tension inner roller 121 is assembled on the inner roller frame 125 in the same way as the tension outer roller 122 is assembled on the outer roller frame 126, that is, the tension inner roller 121 is adjustably arranged on the inner roller frame 125. In other embodiments, the tension inner roller 121 is adjustably arranged on the inner roller frame 125, and the tension outer roller 122 is fixedly arranged on the outer roller frame 126. In this way, the relative position between the tension inner roller 121 and the tension outer roller 122 can be adjusted to adjust the tension of the pole piece material belt 01 on the belt running assembly 12. At the same time, the distance between the tension inner roller 121 and the tension outer roller 122 can be adjusted to facilitate equipment maintenance and pole piece material belt 01 threading operation.

[0047] As shown in Figure 2 and Figure 6 As shown, the etching assembly 11 includes a frame plate 111 and a galvanometer assembly 112, and the galvanometer assembly 112 is adjustably arranged on the frame plate 111. Specifically, as shown in Figure 6As shown, in this embodiment, there are four galvanometer assemblies 112, which are adjustably mounted on the shelf plate 111 through the linear module. Here, the galvanometer assemblies 112 mounted on the shelf plate 111 are enabled to move along the width direction of the pole piece tape 01 through the linear module, so as to produce the score on the pole piece tape 01. The four galvanometer assemblies 112 can effectively improve the processing efficiency.

[0048] Further, the galvanometer assembly 112 comprises a second seat plate 1124, a first adapter plate 1122, a second adapter plate 1123 and a galvanometer head 1121. The second seat plate 1124 is mounted on the linear module and is driven by the linear module to move along the width direction of the pole piece tape 01. The first adapter plate 1122 is slidably mounted on the second seat plate 1124 through a slide rail and slide block assembly. The first adapter plate 1122 is capable of moving relative to the second seat plate 1124 to approach or move away from the etching area 013. The second adapter plate 1123 is slidably mounted on the first adapter plate 1122 through a slide rail and slide block assembly. The galvanometer head 1121 is mounted on the second adapter plate 1123. In this embodiment, the sliding direction of the second adapter plate 1123 relative to the first adapter plate 1122 is the first direction X. The sliding direction of the first adapter plate 1122 relative to the second seat plate 1124 is the second direction Y. The movement direction of the second seat plate 1124 driven by the linear module is the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other in pairs. In this way, the spatial position of the focal point of the laser beam emitted by the galvanometer head 1121 can be adjusted to match the processing requirements of the etching area 013.

[0049] Further, the power source for the movement of the first adapter plate 1122 relative to the second seat plate 1124 can be a telescopic member such as a pneumatic cylinder mounted on the second seat plate 1124, or a lead screw rotatably mounted on the second seat plate 1124 and threadedly connected with the first adapter plate 1122. Correspondingly, the power source for the movement of the second adapter plate 1123 relative to the first adapter plate 1122 can be a telescopic member such as a pneumatic cylinder mounted on the first adapter plate 1122, or a lead screw rotatably mounted on the first adapter plate 1122 and threadedly connected with the second adapter plate 1123.

[0050] As shown in Figure 1 and Figure 7 As shown, a buffering mechanism 105 is arranged between the first etching group 101 and the second etching group 102, for adjusting the tension of the pole piece tape 01 between the first etching group 101 and the second etching group 102. Specifically, as shown in Figure 7As shown, the buffer mechanism 105 comprises an inner stand plate 1051 and an outer stand plate 1052, which are fixedly connected through a fixing rod 1053, the inner stand plate 1051 is arranged on the rack, and a first driving roller 1056 and a first driven roller 1055 are arranged between the inner stand plate 1051 and the outer stand plate 1052, the pole piece material belt 01 output from the first etching group 101 passes through the first driven roller 1055 and the first driving roller 1056, the first driving roller 1056 is parallel to the first driven roller 1055, and the first driving roller 1056 can be close to or away from the first driven roller 1055.

[0051] Further, two transmission shafts 1054 are rotatably arranged between the inner stand plate 1051 and the outer stand plate 1052, the first driving roller 1056 is between the two transmission shafts 1054, and the two transmission shafts 1054 are connected through a synchronous belt. Further, an end of the first driving roller 1056 is slidably connected to the inner stand plate 1051 and the outer stand plate 1052 through a third seat plate 1057, the third seat plate 1057 at least partially penetrates the outer stand plate 1052 and the inner stand plate 1051 and is fixed to the synchronous belt. The transmission shaft 1054 is driven to rotate by a motor, so as to drive the first driving roller 1056 to move relative to the first driven roller 1055, and then adjust the tension degree of the pole piece material belt 01. The third seat plate 1057 is slidably connected to the inner stand plate 1051 and the outer stand plate 1052 through a slide rail and a slide block assembly.

[0052] The technical means disclosed in the utility model scheme is not only limited to the technical means disclosed in the above-mentioned embodiments, but also includes the technical scheme composed of any combination of the above technical features. It should be noted that for ordinary skilled persons in the art, without departing from the principles of the utility model, some improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A laser etching mechanism for electrodes, characterized in that, The etching unit includes an etching assembly and a tape running assembly, the tape running assembly includes two tensioning inner rollers and two tensioning outer rollers, the two tensioning inner rollers are between the two tensioning outer rollers, the pole piece tape passes through the gap between the tensioning outer roller and the tensioning inner roller adjacent to it, and is across between the two tensioning inner rollers, and the focal point of the laser beam of the etching assembly corresponds to the area between the two tensioning inner rollers.

2. The laser engraving mechanism for a pole piece according to claim 1, wherein The area of the pole piece tape across between the two tensioning inner rollers is defined as the etching area, and the etching area is between the tensioning inner rollers and the etching assembly.

3. The laser engraving mechanism for a pole piece according to claim 2, wherein The tape running assembly further includes a dust removal air knife and a dust extraction box, the dust removal air knife is upstream of the dust extraction box in the conveying direction of the pole piece tape, the air outlet of the dust removal air knife faces the etching area, and the air inlet of the dust extraction box faces the etching area.

4. The laser engraving mechanism for a pole piece according to claim 3, wherein The tape running assembly further includes an inner roller frame and an outer roller frame, the tensioning inner rollers are arranged on the inner roller frame, and the outer roller frame is adjustably provided with a closing plate, and the tensioning outer rollers are arranged on the closing plate. The closing plate is in a rectangular shape, the length direction of the closing plate is parallel to the length direction of the tensioning outer rollers, the dust removal air knife is on one side of the width direction of the closing plate, the dust extraction box is on the other side of the width direction of the closing plate, the dust removal air knife is between the closing plate and the tensioning outer roller adjacent to the dust removal air knife, and the dust extraction box is between the closing plate and the tensioning outer roller adjacent to the dust extraction box. A light transmission hole for passing the laser beam is provided through the closing plate.

5. The laser engraving mechanism for a pole piece according to claim 1, wherein The tape running assembly further includes an inner roller frame and an outer roller frame, the tensioning inner rollers are arranged on the inner roller frame, and the tensioning outer rollers are arranged on the outer roller frame, and the tensioning inner rollers are adjustably arranged and / or the tensioning outer rollers are adjustably arranged.

6. The laser engraving mechanism for a pole piece according to claim 2, wherein The tensioning inner rollers are parallel to the tensioning outer rollers.

7. The laser engraving mechanism for a pole piece according to claim 1, wherein The etching assembly includes a frame plate and a galvanometer assembly, and the galvanometer assembly is adjustably arranged on the frame plate.

8. The laser engraving mechanism for a pole piece according to claim 7, wherein The galvanometer assembly includes a second seat plate, a first adapter plate, a second adapter plate and a galvanometer head, the second seat plate can move along the width direction of the pole piece tape, the first adapter plate is slidingly installed on the second seat plate, the first adapter plate can move relative to the second seat plate to approach or move away from the etching area, the second adapter plate is slidingly installed on the first adapter plate, and the galvanometer head is installed on the second adapter plate. The direction in which the second adapter plate slides relative to the first adapter plate is defined as a first direction, the direction in which the first adapter plate slides relative to the second seat plate is defined as a second direction, and the movement direction of the second seat plate is defined as a third direction, and the first direction, the second direction and the third direction are perpendicular to each other in pairs.

9. The laser engraving mechanism for a pole piece according to any one of claims 1 to 8, characterized in that, The pole piece laser etching mechanism further includes a deviation correction assembly, the etching unit for processing the first side of the pole piece tape is defined as a first etching group, the etching unit for processing the second side of the pole piece tape is defined as a second etching group, and the deviation correction assembly is arranged upstream of the first etching group and the second etching group.

10. The laser engraving mechanism for a pole piece according to any one of claims 1-8, wherein The pole piece laser etching mechanism further comprises a rack, and the tensioning inner roller and the tensioning outer roller are arranged on the rack and parallel to the ground.

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