Laser apparatus

Abstract

The invention discloses laser equipment which is used for cutting a pole piece, the pole piece comprises a current collector and an active material layer, the current collector comprises an empty foil area and two coating areas, the laser equipment comprises a laser, an optical splitter and a galvanometer device, and the optical splitter is used for splitting laser emitted by the laser into a first light beam and a second light beam; the galvanometer device comprises a first galvanometer and a second galvanometer, the first galvanometer is used for scanning the first light beam on the empty foil area to cut a first outline of the waste, and the second galvanometer is used for scanning the second light beam on the empty foil area to cut a second outline of the waste and slitting the pole piece into a first sub-pole piece and a second sub-pole piece; the first contour and the second contour define the outer contour of the waste. Thus, the empty foil area is located between the two coating areas, the area of the empty foil area is large, the area of waste cut off from the empty foil area by the laser equipment through cooperation of the first galvanometer and the second galvanometer is large, waste recovery is facilitated, and the working stability of the laser equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery processing equipment, and in particular to a laser equipment. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automotive industry. In this case, electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development. Battery cells generally include pole pieces. During the production process of pole pieces, pole pieces with larger areas need to be cut to form multiple sub-pole pieces. However, the waste obtained by cutting is difficult to recycle and easily affects the stability of laser equipment. Summary of the invention

[0003] In view of the above problems, the present invention provides a laser device, which can improve the stability of the laser device to a certain extent.

[0004] The present invention provides a laser device, which is used for cutting a pole piece. The pole piece includes a current collector and an active material layer. The current collector includes a hollow foil area and two coating areas. The hollow foil area is located between the two coating areas. The active material layer is arranged on the coating area. The laser device includes a laser, a beam splitter and a galvanometer device. The beam splitter is used to split the laser emitted by the laser into a first light beam and a second light beam. The galvanometer device includes a first galvanometer and a second galvanometer. The first galvanometer is used to scan the first light beam on the hollow foil area to cut the first outline of the waste material. The second galvanometer is used to scan the second light beam on the hollow foil area to cut the second outline of the waste material, and the pole piece is cut into a first sub-pole piece and a second sub-pole piece. The first outline and the second outline together enclose the outer outline of the waste material.

[0005] In the laser device of the embodiment of the present application, since the empty foil area is located between the two coating areas, the area of ​​the empty foil area is relatively large, and the area of ​​the waste material cut from the empty foil area by the laser device through the cooperation of the first galvanometer and the second galvanometer is relatively large, which is conducive to waste material recycling and improves the stability of the laser device. In addition, the cooperation of the laser and the beam splitter can reduce the number of lasers in the laser device, which is conducive to reducing the cost of the laser device.

[0006] In some embodiments, the beam splitter includes a semi-transparent and semi-reflective mirror. In the above embodiments, the semi-transparent and semi-reflective mirror can split the laser light emitted by the laser into a first light beam and a second light beam.

[0007] In some embodiments, the laser device includes a first shutter, which is arranged on the optical path of the first light beam and is used to control the on and off of the first light beam; and / or, The laser device includes a second optical gate, which is arranged on the optical path of the second light beam and is used to control the on and off of the second light beam. In the above embodiment, the first optical gate controls the on and off of the first light beam, thereby controlling the cutting of the pole piece; the second optical gate controls the on and off of the second light beam, thereby controlling the cutting of the pole piece.

[0008] In some embodiments, the laser device includes a first reflector, and the first reflector is used to reflect the first light beam toward the first galvanometer. In the above embodiment, the first reflector can change the propagation path of the first light beam, which is conducive to the reasonable arrangement of the positions of various components of the laser device, making the structure of the laser device more compact.

[0009] In some embodiments, the laser device includes a second reflector, and the second reflector is used to reflect the second light beam toward the second galvanometer. In the above embodiment, the second reflector can change the propagation path of the second light beam, which is conducive to the reasonable arrangement of the positions of various components of the laser device, making the structure of the laser device more compact.

[0010] In some embodiments, the laser device includes a light guide assembly, the light guide assembly is arranged between the beam splitter and the galvanometer device, and the light guide assembly is used to transmit the first light beam to the first galvanometer, and to transmit the second light beam to the second galvanometer. In the above embodiment, the light guide assembly can smoothly transmit the first light beam and the second light beam to the first galvanometer and the second galvanometer respectively, so that the galvanometer device and the laser can be arranged in different positions, which makes rational use of space and is conducive to cutting the pole piece.

[0011] In some embodiments, the light guide assembly includes a light converging member, an optical fiber and a light output head, the optical fiber connects the light converging member and the light output head, and the light output head is connected to the galvanometer device. In the above embodiments, the light converging member, the light and the light output head cooperate with each other to transmit the first light beam and the second light beam to the galvanometer device.

[0012] In some embodiments, the galvanometer device includes a housing, the first galvanometer includes a first reflector, a second reflector, a first motor and a second motor, the first motor and the second motor are both mounted on the housing, the first reflector is connected to the first motor, the second reflector is connected to the second motor, the first motor is used to drive the first reflector to rotate around a first axis, the second motor is used to drive the second reflector to rotate around a second axis, and the first axis is perpendicular to the second axis. In the above embodiment, the first motor and the second motor drive the first reflector and the second reflector to rotate respectively, so that the first light beam can move in different directions to cut the first contour of the waste.

[0013] In some embodiments, the galvanometer device includes a housing, the second galvanometer includes a third reflector, a fourth reflector, a third motor and a fourth motor, the third motor and the fourth motor are both mounted on the housing, the third reflector is connected to the third motor, the fourth reflector is connected to the fourth motor, the third motor is used to drive the third reflector to rotate around a first axis, the fourth motor is used to drive the fourth reflector to rotate around a second axis, and the first axis is perpendicular to the second axis. In the above embodiment, the third motor and the fourth motor drive the third reflector and the fourth reflector to rotate respectively, so that the second light beam can move in different directions to cut the second contour of the waste.

[0014] In some embodiments, the first galvanometer and the second galvanometer cooperate to synchronously cut the first contour and the second contour, the cutting starting point and the cutting end point of the first contour and the second contour are the same, and the first contour and the second contour are symmetrically arranged along the cutting path of the first sub-pole piece and the second sub-pole piece. In the above embodiment, the first contour and the second contour are synchronously cut, which can save cutting time, and it is easier to control the scanning path of the first light beam and the second light beam, thereby improving the cutting efficiency of the laser device.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings: Figure 1 It is a schematic diagram of the structure of the laser device of some embodiments of the present invention; Figure 2 Schematic diagram of the cooperation between the laser device and the pole piece in some embodiments of the present invention; Figure 3 Schematic diagram of the structure of the galvanometer device of some embodiments of the present invention.

[0017] Description of reference numerals: 100-laser device; 10-laser; 20-beam splitter; 30-galvanometer device; 31-first galvanometer; 311-first reflector; 312-second reflector; 313-first motor; 314-second motor; 32-second galvanometer; 321-third reflector; 322-fourth reflector; 323-third motor; 324-fourth motor; 33-housing; 331-light inlet; 332-light outlet; 40-first light gate; 50-second light gate Gate; 60-first reflector; 70-second reflector; 80-light guide assembly; 81-light convergence component; 82-optical fiber; 83-light output head; 90-field mirror; 200-pole piece; 210-current collector; 211-empty foil area; 212-coating area; 220-active material layer; 230-first sub-pole piece; 240-second sub-pole piece; 101-first light beam; 102-second light beam; 250-waste; 251-first contour; 252-second contour. DETAILED DESCRIPTION

[0018] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0019] If not otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0020] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0021] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), which means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0023] In the description of the embodiments of the present invention, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] In the description of the embodiments of the present invention, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0026] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0027] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0028] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development. Battery cells generally include pole pieces. During the production process of pole pieces, it is necessary to cut the pole pieces with larger areas to form multiple sub-pole pieces. Generally, in the width direction of the pole piece, the active material layer is arranged in the middle area, and the empty foil area is arranged on both sides. In the process of cutting to form the sub-pole piece, the pole piece is driven by the transmission device, and the empty foil area is cut to form the pole ear of the sub-pole piece. The area of ​​the waste formed by cutting is small, and the conveyor belt of the transmission device has a small adsorption force on the waste by negative pressure, which makes the waste easy to detach from the conveyor belt and the activity trajectory is irregular, resulting in the waste being difficult to recycle, and the waste may be adsorbed on the laser equipment, which is easy to affect the stability of the laser equipment.

[0029] In this regard, in the embodiment of the present application, the empty foil area of ​​the pole piece is set between the two coating areas. The area of ​​the empty foil area is relatively large, and the area of ​​the waste material cut from the empty foil area by the laser device through the cooperation of the first galvanometer and the second galvanometer is relatively large, which is conducive to waste material recycling and improves the stability of the laser device. In addition, the cooperation of the laser and the beam splitter can reduce the number of lasers in the laser device, which is conducive to reducing the cost of the laser device.

[0030] See also Figure 1-Figure 3 The present invention provides a laser device 100, which is used for cutting a pole piece 200. The pole piece 200 includes a current collector 210 and an active material layer 220. The current collector 210 includes a hollow foil area 211 and two coating areas 212. The hollow foil area 211 is located between the two coating areas 212. The active material layer 220 is arranged on the coating area 212. The laser device 100 includes a laser 10, a beam splitter 20 and a galvanometer device 30. The beam splitter 20 is used to split the laser light emitted by the laser 10 into a first beam 10 1 and the second light beam 102; the galvanometer device 30 includes a first galvanometer 31 and a second galvanometer 32, the first galvanometer 31 is used to scan the first light beam 101 on the empty foil area 211 to cut the first contour 251 of the waste 250, the second galvanometer 32 is used to scan the second light beam 102 on the empty foil area 211 to cut the second contour 252 of the waste 250, and cut the pole piece 200 into a first sub-pole piece 230 and a second sub-pole piece 240, and the first contour 251 and the second contour 252 are combined to form the outer contour of the waste 250.

[0031] Specifically, the laser device 100 can emit a laser to the pole piece 200, so as to cut the pole piece 200. The pole piece 200 can be a positive pole piece or a negative pole piece. The current collector 210 is made of a conductive material such as metal. The active material layer 220 can be a material such as lithium iron phosphate and graphite. The empty foil area 211 is located between the two coating areas 212, or in other words, along the width direction of the pole piece 200, the coating area 212-empty foil area 211-coating area 212 are arranged in sequence.

[0032] Since the tabs of the first sub-pole piece 230 and the tabs of the second sub-pole piece 240 are formed by cutting the empty foil area 211, before the empty foil area 211 is cut, the width of the empty foil area 211 is twice the width of the tabs of a single sub-pole piece 200, so that the area of ​​the waste material 250 formed by cutting on the empty foil area 211 is large. Therefore, the waste material 250 is easily adsorbed by the conveying device, so as to be recycled after being conveyed to the recycling device, and will not move to the laser device 100.

[0033] The laser 10 is a component for emitting laser light. After the laser 10 emits laser light, it can be divided into a first light beam 101 and a second light beam 102 through a beam splitter 20. The light intensities of the first light beam 101 and the second light beam 102 can be equal. The first galvanometer 31 and the second galvanometer 32 are both a kind of laser scanner, and the first galvanometer 31 and the second galvanometer 32 can move the light beam in the XY plane, so that the light beam moves along a predetermined path to cut the empty foil area 211.

[0034] The second light beam 102 can divide the pole piece 200 into two parts of equal width along the length direction of the pole piece 200 when the pole piece 200 is driven by the conveying device, thereby obtaining a first sub-pole piece 230 and a second sub-pole piece 240. After the pole piece 200 is divided into the first sub-pole piece 230 and the second sub-pole piece 240, the maximum width of the first sub-pole piece 230 and the second sub-pole piece 240 is half the width of the pole piece 200.

[0035] In summary, in the laser device 100 of the embodiment of the present application, since the empty foil area 211 is located between the two coating areas 212, the area of ​​the empty foil area 211 is relatively large, and the area of ​​the waste material 250 cut from the empty foil area 211 by the laser device 100 through the cooperation of the first galvanometer 31 and the second galvanometer 32 is relatively large, which is conducive to the recycling of the waste material 250 and improves the working stability of the laser device 100. In addition, the cooperation of the laser 10 and the beam splitter 20 can reduce the number of lasers 10 of the laser device 100, which is conducive to reducing the cost of the laser device 100.

[0036] In some embodiments, the beam splitter 20 includes a semi-transparent and semi-reflective mirror. Specifically, when the laser is irradiated onto the surface of the semi-transparent and semi-reflective mirror, a portion of the laser light will pass through the surface of the semi-transparent and semi-reflective mirror, while another portion of the light will be reflected back by the surface of the semi-transparent and semi-reflective mirror, thereby forming a first light beam 101 and a second light beam 102. The light intensities of the first light beam 101 and the second light beam 102 can both be 50% of the laser light before the splitting. In the above embodiments, the semi-transparent and semi-reflective mirror can split the laser light emitted by the laser 10 into the first light beam 101 and the second light beam 102.

[0037] See also Figure 1 In some embodiments, the laser device 100 includes a first optical gate 40, which is disposed on the optical path of the first light beam 101 and is used to control the on and off of the first light beam 101. Specifically, the optical gate is a device for controlling the on and off of a light beam, or in other words, the optical gate can allow the light beam to continue to propagate, or block the light beam from propagating. It can be understood that when the first optical gate 40 allows the first light beam 101 to pass, the first light beam 101 can cut the empty foil area 211, and when the first optical gate 40 blocks the first light beam 101, the first light beam 101 stops cutting the empty foil area 211. In this way, the on and off of the first light beam 101 is controlled by the first optical gate 40, so that the cutting of the pole piece 200 can be controlled, which is conducive to forming the first sub-pole piece 230 and the second sub-pole piece 240.

[0038] See also Figure 1 In some embodiments, the laser device 100 includes a second optical gate 50, which is disposed on the optical path of the second light beam 102 and is used to control the on-off of the second light beam 102. It can be understood that when the second optical gate 50 allows the second light beam 102 to pass, the second light beam 102 can cut the empty foil area 211, and when the second optical gate 50 blocks the second light beam 102, the second light beam 102 stops cutting the empty foil area 211. In this way, the on-off of the second light beam 102 is controlled by the second optical gate 50, so that the cutting of the pole piece 200 can be controlled, which is conducive to forming the first sub-pole piece 230 and the second sub-pole piece 240.

[0039] It should be noted that, in some embodiments, the laser device 100 may include a first optical shutter 40 and a second optical shutter 50 at the same time.

[0040] See also Figure 1In some embodiments, the laser device 100 includes a first reflector 60, which is used to reflect the first light beam 101 toward the first galvanometer 31. Specifically, the first reflector 60 is disposed on one side of the beam splitter 20, and the first reflector 60 can turn the first light beam 101 to 90°. The number of the first reflector 60 can be one or more. In this way, the first reflector 60 can change the propagation path of the first light beam 101, which is conducive to the reasonable arrangement of the positions of the various components of the laser device 100, so that the structure of the laser device 100 is more compact.

[0041] See also Figure 1 In some embodiments, the laser device 100 includes a second reflector 70, and the second reflector 70 is used to reflect the second light beam 102 toward the second galvanometer 32. Specifically, the second reflector 70 is disposed on one side of the beam splitter 20, and the second reflector 70 can redirect the second light beam 102. The number of the second reflector 70 can be one or more, such as Figure 1 In the embodiment of the present invention, there are two second reflectors 70. In this way, the second reflector 70 can change the propagation path of the second light beam 102, which is conducive to the reasonable arrangement of the positions of the various components of the laser device 100, making the structure of the laser device 100 more compact.

[0042] In some embodiments, the first light beam 101 reflected by the first reflector 60 and the second light beam 102 reflected by the second reflector 70 are parallel, and the propagation directions of the first light beam 101 reflected by the first reflector 60 and the second light beam 102 reflected by the second reflector 70 are the same, which is conducive to the first light beam 101 and the second light beam 102 entering the galvanometer device 30 along the same direction.

[0043] See also Figure 1 In some embodiments, the laser device 100 includes a light guide assembly 80, which is disposed between the beam splitter 20 and the galvanometer device 30. The light guide assembly 80 is used to transmit the first light beam 101 to the first galvanometer 31, and to transmit the second light beam 102 to the second galvanometer 32. Specifically, the light guide assembly 80 may include one or more parts, and the light guide assembly 80 may be connected to the galvanometer device 30, so that the first light beam 101 and the second light beam 102 may be transmitted to the galvanometer device 30. In this way, the light guide assembly 80 may smoothly transmit the first light beam 101 and the second light beam 102 to the first galvanometer 31 and the second galvanometer 32, respectively, so that the galvanometer device 30 and the laser 10 may be arranged at different positions, so that the space is reasonably utilized, which is conducive to cutting the pole piece 200.

[0044] See also Figure 1In some embodiments, the light guide assembly 80 includes a light converging member 81, an optical fiber 82, and a light head 83, the optical fiber 82 connects the light converging member 81 and the light head 83, and the light head 83 is connected to the galvanometer device 30. Specifically, the light converging member 81 is a part that converges the first light beam 101 and the second light beam 102 in the same component, so that the first light beam 101 and the second light beam 102 can enter the optical fiber 82. The optical fiber 82 can independently transmit the first light beam 101 and the second light beam 102, or in other words, the first light beam 101 and the second light beam 102 do not interfere with each other during the transmission process in the optical fiber 82. The light head 83 and the galvanometer device 30 can be connected by screws or the like, so that the transmission path of the first light beam 101 and the second light beam 102 is stable, and the light head 83 can transmit the first light beam 101 and the second light beam 102 to the galvanometer device 30. Therefore, the light converging member 81, the optical fiber 82, and the light head 83 cooperate with each other to transmit the first light beam 101 and the second light beam 102 to the galvanometer device 30.

[0045] See also Figure 3 In some embodiments, the galvanometer device 30 includes a shell 33, the first galvanometer 31 includes a first reflector 311, a second reflector 312, a first motor 313 and a second motor 314, the first motor 313 and the second motor 314 are both installed in the shell 33, the first reflector 311 is connected to the first motor 313, the second reflector 312 is connected to the second motor 314, the first motor 313 is used to drive the first reflector 311 to rotate around a first axis, the second motor 314 is used to drive the second reflector 312 to rotate around a second axis, and the first axis is perpendicular to the second axis.

[0046] Specifically, the housing 33 can provide support for the first motor 313 and the second motor 314, so that the positions of the first motor 313 and the second motor 314 are stable, so that the first reflector 311 and the second reflector 312 can be driven more accurately. The housing 33 can be provided with a light inlet 331 and a light outlet 332, and the light converging member 81 can be connected to the light inlet 331, so that the first light beam 101 is transmitted to the first reflector 311, and is emitted from the light outlet 332 after being reflected by the first reflector 311 and the second reflector 312.

[0047] The first motor 313 and the second motor 314 can both be servo motors, so that the rotation angle of the first reflector 311 and the second reflector 312 can be accurately controlled. Since the first axis and the second axis are perpendicular, the first reflector 311 can rotate around the first axis, and the second reflector 312 can rotate around the second axis. The first motor 313 and the second motor 314 drive the first reflector 311 and the second reflector 312 to rotate respectively, so that the first light beam 101 can move in different directions to cut the first contour 251 of the waste material 250.

[0048] It should be noted that the first axis may coincide with the central axis of the first motor 313 ; and the second axis may coincide with the central axis of the second motor 314 .

[0049] See also Figure 3 In some embodiments, the galvanometer device 30 includes a shell 33, the second galvanometer 32 includes a third reflector 321, a fourth reflector 322, a third motor 323 and a fourth motor 324, the third motor 323 and the fourth motor 324 are both installed on the shell 33, the third reflector 321 is connected to the third motor 323, the fourth reflector 322 is connected to the fourth motor 324, the third motor 323 is used to drive the third reflector 321 to rotate around a first axis, the fourth motor 324 is used to drive the fourth reflector 322 to rotate around a second axis, and the first axis is perpendicular to the second axis.

[0050] Specifically, the second light beam 102 can be transmitted from the light entrance 331 of the housing 33 to the third reflector 321, and then emitted from the light exit 332 after being reflected by the third reflector 321 and the fourth reflector 322. The third motor 323 and the fourth motor 324 can both be servo motors, so that the rotation angles of the third reflector 321 and the fourth reflector 322 can be accurately controlled.

[0051] Since the first axis and the second axis are perpendicular, the third reflector 321 can rotate around the first axis, and the fourth reflector 322 can rotate around the second axis. The third motor 323 and the fourth motor 324 respectively drive the third reflector 321 and the fourth reflector 322 to rotate, so that the second light beam 102 can move in different directions to cut the second contour 252 of the waste 250.

[0052] like Figure 2 As shown, in some embodiments, the first galvanometer 31 and the second galvanometer 32 cooperate to synchronously cut the first contour 251 and the second contour 252, the cutting starting point and the cutting end point of the first contour 251 and the second contour 252 are the same, and the first contour 251 and the second contour 252 are symmetrically arranged along the cutting path of the first sub-pole piece 230 and the second sub-pole piece 240. In this way, the first contour 251 and the second contour 252 are synchronously cut, which can save cutting time, and it is easier to control the scanning path of the first light beam 101 and the second light beam 102, thereby improving the cutting efficiency of the laser device 100.

[0053] like Figure 2As shown, in one example, the first light beam 101 is cyclically scanned along the path of 1-, 2-, 3- in sequence, thereby cutting the first contour 251 of the waste material 250, and the second light beam 102 is cyclically scanned along the path of 1+, 2+, 3+, 4+ in sequence, thereby cutting the second contour 252 of the waste material 250 and dividing the pole piece 200 into a first sub-pole piece 230 and a second sub-pole piece 240.

[0054] See also Figure 1 In some embodiments, the laser device 100 further includes a field lens 90 connected to the galvanometer device 30 , and the field lens 90 is used to emit the first light beam 101 and the second light beam 102 to the pole piece 200 .

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A laser device, characterized in that: The laser device is used to cut a pole piece, the pole piece includes a current collector and an active material layer, the current collector includes a hollow foil area and two coating areas, the hollow foil area is located between the two coating areas, and the active material layer is arranged on the coating area, the laser device includes: Lasers; A beam splitter, used to split the laser light emitted by the laser into a first light beam and a second light beam; A galvanometer device, the galvanometer device includes a first galvanometer and a second galvanometer, the first galvanometer is used to scan the first light beam on the empty foil area to cut the first contour of the waste material, the second galvanometer is used to scan the second light beam on the empty foil area to cut the second contour of the waste material and cut the pole piece into a first sub-pole piece and a second sub-pole piece, the first contour and the second contour together form the outer contour of the waste material, the first galvanometer and the second galvanometer cooperate to synchronously cut the first contour and the second contour, the cutting starting point and the cutting end point of the first contour and the second contour are the same, and the first contour and the second contour are symmetrically arranged along the cutting path of the first sub-pole piece and the second sub-pole piece.

2. The laser device according to claim 1, characterized in that: The beam splitter includes a semi-transparent and semi-reflective mirror.

3. The laser device according to claim 1, characterized in that: The laser device comprises a first optical shutter, which is arranged on the optical path of the first light beam and is used to control the on and off of the first light beam; and / or, The laser device comprises a second optical shutter, which is arranged on the optical path of the second light beam and is used to control the on and off of the second light beam.

4. The laser device according to claim 1, characterized in that: The laser device includes a first reflector, and the first reflector is used to reflect the first light beam toward the first galvanometer mirror.

5. The laser device according to claim 1, characterized in that: The laser device comprises a second reflecting mirror, and the second reflecting mirror is used for reflecting the second light beam toward the second galvanometer mirror.

6. The laser device according to claim 1, characterized in that: The laser device comprises a light guide component, which is arranged between the beam splitter and the galvanometer device, and is used to transmit the first light beam to the first galvanometer, and to transmit the second light beam to the second galvanometer.

7. The laser device according to claim 6, characterized in that The light guide assembly comprises a light converging member, an optical fiber and a light output head. The optical fiber connects the light converging member and the light output head, and the light output head is connected to the galvanometer device.

8. The laser device according to claim 1, characterized in that The galvanometer device includes a shell, the first galvanometer includes a first reflector, a second reflector, a first motor and a second motor, the first motor and the second motor are both installed on the shell, the first reflector is connected to the first motor, the second reflector is connected to the second motor, the first motor is used to drive the first reflector to rotate around a first axis, the second motor is used to drive the second reflector to rotate around a second axis, and the first axis is perpendicular to the second axis.

9. The laser device according to claim 1, characterized in that: The galvanometer device includes a shell, the second galvanometer includes a third reflector, a fourth reflector, a third motor and a fourth motor, the third motor and the fourth motor are both installed on the shell, the third reflector is connected to the third motor, the fourth reflector is connected to the fourth motor, the third motor is used to drive the third reflector to rotate around a first axis, and the fourth motor is used to drive the fourth reflector to rotate around a second axis, and the first axis is perpendicular to the second axis.

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