A lithium battery electrode cutting device

Abstract

The present application discloses a lithium battery electrode cutting device, which includes a laser cutting mechanism, which includes a green laser, an optical transmission component and a galvanometer component. The green laser is used to emit a green laser beam with a preset wavelength; the optical transmission component is located between the green laser and the galvanometer component, and is used to collimate the green laser beam emitted by the green laser into the galvanometer component; the galvanometer component includes a galvanometer scanning head arranged directly opposite the laser cutting area, which is used to focus the green laser beam injected into the galvanometer component on the laser cutting area, and make the green laser beam scan and move along a first preset direction to perform laser cutting operations on the lithium battery electrode in the laser cutting area. This technical solution can improve the technical problem that the existing lithium battery electrode cutting equipment uses ordinary infrared nanosecond lasers to cut the positive electrode of lithium batteries, resulting in occasional large burrs on the surface of the cut product, affecting the quality of the cut product.

Description

Technical Field

[0001] The present application relates to the field of electrode cutting technology, and in particular to a lithium battery electrode cutting device. Background Art

[0002] At present, the existing lithium battery electrode cutting equipment on the market all uses ordinary infrared nanosecond lasers to perform laser cutting operations on lithium battery electrodes. In lithium battery electrodes, the positive electrode is generally a positive electrode ceramic material (such as boehmite). Therefore, when ordinary infrared nanosecond lasers are used to process the positive electrode of lithium batteries, the laser acts on the surface of the positive electrode ceramic material, causing the positive electrode ceramic material to absorb laser photons and then melt and vaporize. However, due to the longer wavelength of ordinary infrared nanosecond lasers, their energy is more easily absorbed by many materials, and the penetration depth is usually greater, which will produce a larger heat-affected zone inside the material, making it easy for the material to absorb and dissipate heat unevenly during the processing process, resulting in occasional large burrs on the surface of the cut product, affecting the quality of the cut product. Utility Model Content

[0003] The embodiment of the present application provides a lithium battery electrode cutting device, which aims to improve the technical problem that the existing lithium battery electrode cutting equipment uses ordinary infrared nanosecond laser to cut the positive electrode of the lithium battery, resulting in occasional large burrs on the surface of the cut product, affecting the quality of the cut product.

[0004] To this end, an embodiment of the present application provides a lithium battery electrode cutting device, including a laser cutting mechanism, wherein the laser cutting mechanism includes a green laser, an optical transmission component, and a galvanometer component, wherein:

[0005] The green laser is used to emit a green laser beam with a preset wavelength;

[0006] The optical transmission component is located between the green laser and the galvanometer component, and is used to collimate the green laser beam emitted by the green laser and emit it into the galvanometer component;

[0007] The galvanometer assembly includes a galvanometer scanning head arranged opposite to the laser cutting area, which is used to focus the green laser beam injected into the galvanometer assembly on the laser cutting area and scan and move the green laser beam along a first preset direction to perform laser cutting operations on the lithium battery electrodes in the laser cutting area.

[0008] Optionally, in some embodiments of the present application, the preset wavelength is 520nm~540nm.

[0009] Optionally, in some embodiments of the present application, the preset wavelength is 532 nm.

[0010] Optionally, in some embodiments of the present application, the optical transmission component includes a first metal tube having a first optical transmission channel;

[0011] The entrance of the first optical transmission channel is arranged opposite to the laser outlet of the green laser so as to receive the green laser beam emitted by the green laser;

[0012] The outlet of the first optical transmission channel is arranged opposite to the laser inlet of the galvanometer assembly so as to collimate the green laser beam and emit it into the galvanometer assembly.

[0013] Optionally, in some embodiments of the present application, the optical transmission component also includes a first reflector, the opening direction of the entrance of the first optical transmission channel and the opening direction of the laser outlet of the green light laser are arranged perpendicular to each other, and the first reflector is inclined at an angle of 45 degrees between the laser outlet of the green light laser and the entrance of the first optical transmission channel, so that the green laser beam emitted from the laser outlet of the green light laser is reflected and deflected by the first reflector and then collimated and emitted into the entrance of the first optical transmission channel.

[0014] Optionally, in some embodiments of the present application, the optical transmission component also includes a beam expander, which is located between the entrance of the first optical transmission channel and the first reflector, so that the green laser beam emitted from the laser outlet of the green laser is reflected and deflected by the first reflector, and then subjected to secondary collimation and amplification of the light spot by the beam expander, and then collimated and emitted into the entrance of the first optical transmission channel.

[0015] Optionally, in some embodiments of the present application, the optical transmission component also includes a second reflector, the opening direction of the outlet of the first optical transmission channel and the opening direction of the laser inlet of the galvanometer assembly are arranged perpendicular to each other, and the second reflector is inclined at an angle of 45 degrees between the laser inlet of the galvanometer assembly and the outlet of the first optical transmission channel, so that the green laser beam emitted from the outlet of the first optical transmission channel is reflected and deflected by the second reflector and then collimated and emitted into the galvanometer assembly.

[0016] Optionally, in some embodiments of the present application, the optical transmission component also includes a second metal tube having a second optical transmission channel, and the second metal tube is arranged between the laser inlet of the galvanometer assembly and the second reflector, so that the green laser beam emitted from the outlet transmitted through the first optical transmission channel is reflected and deflected by the second reflector, and then collimated and transmitted through the second optical transmission channel, and then collimated and emitted into the galvanometer assembly.

[0017] Optionally, in some embodiments of the present application, the optical transmission component also includes at least one third reflector, which is sequentially arranged between the laser inlet of the galvanometer assembly and the second metal tube to reflect and deflect the green laser beam emitted from the outlet transmitted through the second optical transmission channel at least once, and then collimate it into the galvanometer assembly.

[0018] Optionally, in some embodiments of the present application, two or more of the laser cutting mechanisms are included, and the galvanometer assemblies of the two or more of the laser cutting mechanisms are arranged and distributed at intervals along the second preset direction.

[0019] The lithium battery electrode cutting device provided by the technical solution of the present application includes a laser cutting mechanism, and the laser cutting mechanism includes a green laser, an optical transmission component and a galvanometer component, wherein the green laser is used to emit a green laser beam with a preset wavelength. The optical transmission component is located between the green laser and the galvanometer component, and is used to collimate the green laser beam emitted by the green laser into the galvanometer component. The galvanometer component includes a galvanometer scanning head arranged opposite to the laser cutting area, which is used to focus the green laser beam injected into the galvanometer component on the laser cutting area, and scan and move the green laser beam along a first preset direction to perform a laser cutting operation on the lithium battery electrode in the laser cutting area. In this way, the laser cutting mechanism of the lithium battery electrode cutting equipment can realize laser cutting of the positive electrode of the lithium battery through a green laser beam of a preset wavelength by using a green laser with an optical transmission component and a galvanometer component. Compared with ordinary infrared nanosecond lasers, the wavelength of the green laser beam is shorter, and its energy may be more reflected or transmitted, so that the penetration depth is shallow, and the thermal impact on the material is relatively small, and no large heat-affected zone will be generated inside the material. At the same time, the focused spot of the green laser beam is smaller than that of ordinary infrared nanosecond lasers, and the input heat is low, which will reduce material splashing, thereby greatly reducing the probability of occasional large burrs on the surface of the cut product, and effectively improving the quality of the cut product. It can be seen that the technical solution improves the technical problem that the existing lithium battery electrode cutting equipment uses ordinary infrared nanosecond lasers to cut the positive electrode of lithium batteries, resulting in occasional large burrs on the surface of the cut product, affecting the quality of the cut product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1This is a schematic diagram of the structure of a lithium battery electrode cutting device according to an embodiment of the present application;

[0022] Figure 2 for Figure 1 Another angle structural schematic diagram of the lithium battery electrode cutting equipment is shown.

[0023] Description of Figure Numbers:

[0024] 1. Lithium battery electrode cutting equipment; 100. Laser cutting mechanism; 110. Green laser; 120. Optical transmission component; 121. First metal tube; 122. First reflector; 123. Beam expander; 124. Second reflector; 125. Second metal tube; 126. Third reflector; 130. Galvanometer component.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0029] In one embodiment, Figure 1 and Figure 2As shown, the embodiment of the present application provides a lithium battery electrode cutting device 1, which may specifically include a laser cutting mechanism 100, the laser cutting mechanism 100 includes a green laser 110, an optical transmission component 120 and a galvanometer component 130, wherein the green laser 110 is mainly used to emit a green laser beam with a preset wavelength. The optical transmission component 120 may be specifically located between the green laser 110 and the galvanometer component 130, so as to collimate the green laser beam emitted by the green laser 110 into the galvanometer component 130. The galvanometer component 130 may specifically include a galvanometer scanning head arranged directly opposite to the laser cutting area, so as to focus the green laser beam injected into the galvanometer component 130 on the laser cutting area, and scan and move the green laser beam along a first preset direction, so as to perform a laser cutting operation on the lithium battery electrode in the laser cutting area.

[0030] It can be understood that the lithium battery electrode cutting device 1 of the embodiment of the present application can be specifically used for the laser cutting of the positive and negative electrode materials of the lithium battery, and is particularly suitable for the cutting operation of the positive electrode ceramic material (such as boehmite) as the positive electrode of the lithium battery. The working power of the green laser 110 mentioned above is preferably 200w to 400w. In addition, in order to meet the laser cutting operation of the lithium battery electrode by the lithium battery electrode cutting device 1, in addition to the laser cutting mechanism 100 that specifically implements the laser cutting operation, it should also include at least a conveying device (not shown) for feeding the lithium battery electrode to be processed into the laser cutting area and discharging it after the cutting is completed. The conveying device can specifically include components such as a conveyor belt and a conveying device to ensure the stability and continuity of the lithium battery electrode during the cutting process. In addition to the above-mentioned main components, the lithium battery ear laser cutting equipment may also include some auxiliary equipment, such as a cooling system (for cooling the laser and the workpiece), a dust removal system (for cleaning the dust generated by cutting), etc., to ensure the normal operation of the equipment and the cleanliness of the operating environment.

[0031] In this way, the lithium battery electrode cutting equipment 1 provided in the embodiment of the present application, its laser cutting mechanism 100 can realize laser cutting of the positive electrode of the lithium battery through a green light laser beam of a preset wavelength through the green light laser 110 in conjunction with the optical transmission component 120 and the galvanometer component 130. Compared with ordinary infrared nanosecond lasers, the wavelength of the green light laser beam is shorter, and its energy may be more reflected or transmitted, so that the penetration depth is shallow, and the thermal impact on the material is relatively small, and no large heat-affected zone is generated inside the material. At the same time, the focused spot of the green light laser beam is also smaller than that of an ordinary infrared nanosecond laser, and the input heat is low, which will reduce material splashing, thereby greatly reducing the probability of occasional large burrs on the surface of the cut product, effectively improving the quality of the cut product.

[0032] In some examples, the preset wavelength mentioned above can be specifically 520nm to 540nm. In this way, the green laser beam emitted by the green laser 110 can be set to have a better laser cutting effect on the lithium battery electrode by setting the above value range. Furthermore, the preset wavelength is preferably 532nm, which can ensure that the green laser beam emitted by the green laser 110 has the best laser cutting effect on the lithium battery electrode. The implementation data shows that at this wavelength, whether the working power of the green laser 110 is 200w or 400w, it can meet the high-quality cutting of the lithium battery electrode, wherein the quality of the cut lithium battery electrode is as follows: plane burr size <15μm, end face burr size <15μm, anti-focus fluctuation >0.6mm. Compared with the original ordinary infrared nanosecond laser cutting, the quality of the cut lithium battery electrode is as follows: end face burr size <50μm, plane burr size <25μm, anti-focus fluctuation <0.3mm. Compared with the two, the technical method of the present application has a better laser cutting effect.

[0033] In some examples, such as Figure 1 and Figure 2 As shown, the optical transmission component 120 may specifically include a first metal tube 121 having a first optical transmission channel. The inlet of the first optical transmission channel is arranged opposite to the laser outlet of the green laser 110 to access the green laser beam emitted by the green laser 110. The outlet of the first optical transmission channel is arranged opposite to the laser inlet of the galvanometer assembly 130 to collimate the green laser beam into the galvanometer assembly 130. In this way, the external protection of the first metal tube 121 can ensure that the green laser beam emitted by the green laser 110 can be collimated and injected into the galvanometer assembly 130 without loss through the first optical transmission channel, so as to avoid the loss problem of the green laser beam caused by the existing optical fiber transmission structure. This is because the material of the optical fiber transmission structure has different refractive indices for light of different wavelengths, resulting in different degrees of loss when light of different wavelengths is transmitted in the optical fiber, and the existing optical fiber material is only good for the transmission effect of red light, while the transmission effect of green light is relatively poor. Further, the first metal tube 121 may specifically be a copper tube.

[0034] In some examples, such as Figure 1 and Figure 2As shown, the optical transmission component 120 specifically further includes a first reflector 122. At this time, the opening direction of the entrance of the first optical transmission channel can be specifically arranged perpendicular to the opening direction of the laser outlet of the green laser 110. The first reflector 122 is arranged at a 45-degree angle between the laser outlet of the green laser 110 and the entrance of the first optical transmission channel, so that the green laser beam emitted from the laser outlet of the green laser 110 is reflected and turned by the first reflector 122 and then collimated and injected into the entrance of the first optical transmission channel. In this way, the first optical transmission channel and the green laser 110 can have different structural layouts through the structural arrangement of the first reflector 122 to meet the structural design requirements of different laser cutting mechanisms 100.

[0035] In some examples, such as Figure 1 and Figure 2 As shown, the optical transmission component 120 specifically further includes a beam expander 123, which can be specifically located between the entrance of the first optical transmission channel and the first reflector 122, so that the green laser beam emitted from the laser outlet of the green laser 110 is reflected and turned by the first reflector 122, and then collimated and injected into the entrance of the first optical transmission channel after the second collimation and amplification of the light spot by the beam expander 123. In this way, the arrangement of the beam expander 123 can make the green laser beam better form a laser spot with the spot diameter required for laser cutting, and at the same time, ensure that it can be injected into the entrance of the first optical transmission channel more collimated.

[0036] In some examples, such as Figure 1 and Figure 2 As shown, the optical transmission component 120 specifically further includes a second reflector 124. At this time, the opening direction of the outlet of the first optical transmission channel and the opening direction of the laser inlet of the galvanometer component 130 are arranged perpendicular to each other, and the second reflector 124 is arranged at a 45-degree angle between the laser inlet of the galvanometer component 130 and the outlet of the first optical transmission channel, so that the green laser beam emitted from the outlet of the first optical transmission channel is reflected and turned by the second reflector 124, and then collimated and emitted into the galvanometer component 130. In this way, the first optical transmission channel and the galvanometer component 130 can have different structural layouts through the structural setting of the second reflector 124 to meet the structural design requirements of different laser cutting mechanisms 100.

[0037] In some examples, such as Figure 1 and Figure 2As shown, the optical transmission component 120 specifically also includes a second metal tube 125 with a second optical transmission channel, and the second metal tube 125 can be specifically arranged between the laser entrance of the galvanometer component 130 and the second reflector 124, so that the green laser beam emitted from the outlet transmitted through the first optical transmission channel is reflected and turned by the second reflector 124, and then collimated and transmitted through the second optical transmission channel, and then collimated and injected into the galvanometer component 130. In this way, the external protection of the second metal tube 125 can ensure that the green laser beam emitted by the green laser 110 can be transmitted through the lossless collimation of the first optical transmission channel, and then collimated and injected into the galvanometer component 130 without loss through the second optical transmission channel, so as to avoid the loss problem of the green laser beam caused by the existing optical fiber transmission structure. Further, the second metal tube 125 can be specifically a copper tube.

[0038] In some examples, such as Figure 1 and Figure 2 As shown, the optical transmission component 120 specifically further includes at least one third reflector 126, which is sequentially arranged between the laser inlet of the galvanometer component 130 and the second metal tube 125, so as to reflect and redirect the green laser beam emitted from the outlet of the second optical transmission channel at least once, and then collimate and emit it into the galvanometer component 130. In this way, through the structural arrangement of at least one third reflector 126, more structural layout designs can be provided between the second optical transmission channel and the galvanometer component 130 to meet the structural design requirements of different laser cutting mechanisms 100.

[0039] In some examples, such as Figure 1 and Figure 2 As shown, the lithium battery electrode cutting device 1 may specifically include two or more laser cutting mechanisms 100, and the galvanometer assemblies 130 of the two or more laser cutting mechanisms 100 are arranged and distributed along the second preset direction. In this way, by setting two or more laser cutting mechanisms 100 at the same time, the laser cutting operation of the lithium battery electrode can be performed simultaneously, which can greatly improve its cutting efficiency.

[0040] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A lithium battery electrode cutting device, characterized in that: It includes a laser cutting mechanism, which includes a green laser, an optical transmission component and a galvanometer component, wherein: The green laser is used to emit a green laser beam with a preset wavelength; The optical transmission component is located between the green laser and the galvanometer component, and is used to collimate the green laser beam emitted by the green laser into the galvanometer component. The optical transmission component includes a first metal tube having a first optical transmission channel. The inlet of the first optical transmission channel is arranged opposite to the laser outlet of the green laser to receive the green laser beam emitted by the green laser. The outlet of the first optical transmission channel is arranged opposite to the laser inlet of the galvanometer component to collimate the green laser beam into the galvanometer component. The galvanometer assembly includes a galvanometer scanning head arranged opposite to the laser cutting area, which is used to focus the green laser beam injected into the galvanometer assembly on the laser cutting area and scan and move the green laser beam along a first preset direction to perform laser cutting operations on the lithium battery electrodes in the laser cutting area.

2. The lithium battery electrode cutting device according to claim 1, characterized in that: The preset wavelength is 520nm-540nm.

3. The lithium battery electrode cutting device according to claim 2, characterized in that: The preset wavelength is 532 nm.

4. The lithium battery electrode cutting device according to claim 1, characterized in that: The optical transmission component also includes a first reflector. The opening direction of the entrance of the first optical transmission channel and the opening direction of the laser outlet of the green laser are arranged perpendicular to each other. The first reflector is inclined at an angle of 45 degrees between the laser outlet of the green laser and the entrance of the first optical transmission channel, so that the green laser beam emitted from the laser outlet of the green laser is reflected and deflected by the first reflector and then collimated and emitted into the entrance of the first optical transmission channel.

5. The lithium battery electrode cutting device according to claim 4, characterized in that: The optical transmission component also includes a beam expander, which is located between the entrance of the first optical transmission channel and the first reflector, so that the green laser beam emitted from the laser outlet of the green laser is reflected and deflected by the first reflector, and then is collimated and amplified by the beam expander before being collimated and emitted into the entrance of the first optical transmission channel.

6. The lithium battery electrode cutting device according to claim 3, characterized in that: The optical transmission component also includes a second reflector, the opening direction of the outlet of the first optical transmission channel and the opening direction of the laser inlet of the galvanometer assembly are arranged perpendicular to each other, and the second reflector is inclined at an angle of 45 degrees between the laser inlet of the galvanometer assembly and the outlet of the first optical transmission channel, so that the green laser beam emitted from the outlet of the first optical transmission channel is reflected and deflected by the second reflector and then collimated and emitted into the galvanometer assembly.

7. The lithium battery electrode cutting device according to claim 6, characterized in that: The optical transmission component also includes a second metal tube having a second optical transmission channel, and the second metal tube is arranged between the laser inlet of the galvanometer component and the second reflector, so that the green laser beam emitted from the outlet transmitted through the first optical transmission channel is reflected and deflected by the second reflector, and then collimated and transmitted through the second optical transmission channel, and then collimated and emitted into the galvanometer component.

8. The lithium battery electrode cutting device according to claim 7, characterized in that: The optical transmission component also includes at least one third reflector, which is sequentially arranged between the laser inlet of the galvanometer component and the second metal tube to reflect and redirect the green laser beam emitted from the outlet transmitted through the second optical transmission channel at least once, and then collimate it into the galvanometer component.

9. The lithium battery electrode cutting device according to any one of claims 1 to 8, characterized in that: It comprises two or more laser cutting mechanisms, and the galvanometer components of the two or more laser cutting mechanisms are arranged and distributed at intervals along a second preset direction.

Images