Dust removal device, laser cutting system and battery production line

Abstract

The invention provides a dust removal device, a laser cutting system and a battery production line, and the dust removal device comprises a main body used for covering a to-be-cut material, the main body is provided with a cutting avoiding gap, and the cutting avoiding gap penetrates through the surface, facing the to-be-cut material, of the main body and the surface, deviating from the to-be-cut material, of the main body; the cyclone cavity is arranged in the main body, the main body is provided with an air inlet channel and an air outlet channel which are communicated with the cyclone cavity, the cyclone cavity penetrates through the surface, facing a to-be-cut material, of the main body, and the side, facing the cutting avoiding gap, of the cyclone cavity and the cutting avoiding gap have a first overlapping part. Due to the fact that the side, facing the cutting receding gap, of the cyclone cavity and the cutting receding gap are provided with the first coincident part, the edge high-speed area of the high-speed upward-spinning airflow can act on the cutting receding gap, and the airflow in the cutting receding gap has the high flow speed.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production equipment, and in particular to a dust removal device, a laser cutting system and a battery production line. Background Art

[0002] In the battery production process, the metal foil coated with active materials needs to be cut into blocks to form pole pieces. Strip cutting methods include laser cutting and hardware cutting. Among them, laser cutting of pole pieces is widely used in the cutting process of pole pieces due to its high efficiency. However, pole pieces are prone to dust and molten beads during the laser cutting process. If they are not cleaned in time, it will directly affect the accuracy of laser cutting and the quality of pole pieces.

[0003] In the prior art, the dust collection method during the laser cutting of the pole piece adopts negative pressure airflow adsorption, or positive pressure air knife blowing along a fixed flow channel. These dust collection methods not only have low collection efficiency, but also incomplete dust cleaning, making it easy for dust to attach to the pole piece and enter the subsequent process, and the cleaning effect of the molten beads generated during the cutting process is not effective, affecting the production quality and performance of lithium batteries. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor cleaning effect and low efficiency of the dust removal system for laser cutting of pole pieces in the prior art, thereby providing a dust removal device, a laser cutting system and a battery production line.

[0005] In order to solve the above problems, the present invention provides a dust removal device, comprising: a main body, used to cover the material to be cut, the main body is provided with a cutting avoidance gap, the cutting avoidance gap penetrates the surface of the main body facing the material to be cut and the surface away from the material to be cut; a cyclone cavity, arranged in the main body, the main body is provided with an air inlet channel and an air outlet channel connected to the cyclone cavity, the cyclone cavity penetrates the surface of the main body facing the material to be cut, and the side of the cyclone cavity facing the cutting avoidance gap has a first overlapping portion with the cutting avoidance gap.

[0006] Optionally, the edge of the cyclone cavity coincides with the cutting avoidance gap.

[0007] Optionally, there are multiple cyclone cavities, wherein the multiple cyclone cavities are arranged at intervals along the extension direction of the cutting avoidance gap; and / or the multiple cyclone cavities are distributed on both sides of the cutting avoidance gap.

[0008] Optionally, the multiple cyclone cavities include a first cavity group and a second cavity group, the first cavity group and the second cavity group are distributed on both sides of the cutting avoidance gap, the first cavity group includes multiple cyclone cavities, and the second cavity group includes multiple cyclone cavities.

[0009] Optionally, the multiple cyclone cavities of the first cavity group and the multiple cyclone cavities of the second cavity group are staggered along the extension direction of the cutting avoidance gap.

[0010] Optionally, the adjacent cyclone chambers of the first cavity group and the adjacent cyclone chambers of the second cavity group have a second overlapping portion, and the second overlapping portion is communicated with the first overlapping portion.

[0011] Optionally, among the multiple cyclone cavities of the first cavity group, at least some of the air inlet channels have the same tangential direction of air inlet in the cyclone cavity, or, among the multiple cyclone cavities of the second cavity group, at least some of the air inlet channels have the same or opposite tangential direction of air inlet in the cyclone cavity.

[0012] Optionally, an air inlet tangential direction of the air inlet channel in the cyclone cavity of the first cavity group is opposite to an air inlet tangential direction of the air inlet channel in the cyclone cavity of the second cavity group.

[0013] Optionally, the first cavity group and the second cavity group are both inclined, and the inclination direction of the cyclone cavity of the first cavity group and the inclination direction of the cyclone cavity of the second cavity group are symmetrically arranged relative to the cutting avoidance gap.

[0014] Optionally, there are multiple air inlet channels and multiple air outlet channels, and the multiple air inlet channels are arranged in a one-to-one correspondence with the multiple cyclone cavities, and the multiple air outlet channels are arranged in a one-to-one correspondence with the multiple cyclone cavities, wherein a switch structure is provided at each air inlet channel; and / or, it also includes multiple air inlet pipes, and the multiple air inlet pipes are connected to the multiple air inlet channels in a one-to-one correspondence.

[0015] Optionally, the space inside the cyclone cavity is cylindrical, or the space inside the cyclone cavity is conical, and the flow area of ​​the cyclone cavity gradually increases in a direction away from the material to be cut.

[0016] Optionally, the air inlet channel is an opening formed on the inner wall of the cyclone cavity, and the opening is located on a side of the cyclone cavity close to the material to be cut.

[0017] Optionally, the cyclone chamber is vertically or inclined.

[0018] Optionally, a reduced diameter section is provided on one side of the air inlet passage close to the cyclone cavity.

[0019] Optionally, the air inlet channel passes through a surface of the main body facing the material to be cut.

[0020] Optionally, the main body is in the shape of an elongated strip, and an extending direction of the cutting avoidance slit is parallel to an extending direction of the main body, or an extending direction of the cutting avoidance slit has a preset angle with an extending direction of the main body.

[0021] Optionally, the cutting avoidance gap is a straight line, or a curve, or a combination of a straight line and a curve.

[0022] The present invention also provides a laser cutting system, comprising: a cutting table; a dust removal device, which is arranged on the cutting table, and the dust removal device is the above-mentioned dust removal device; and a laser, which is arranged above the dust removal device.

[0023] Optionally, the laser cutting system further comprises a first blowing structure, wherein the first blowing structure is suitable for blowing air into a gap between the cutting table and the dust removal device.

[0024] Optionally, the laser cutting system further includes a first air suction structure, and the first air suction structure is arranged opposite to the first air blowing structure.

[0025] Optionally, the laser cutting system further includes a second blowing structure and a second suction structure, the second blowing structure being used for blowing air toward the surface of the main body where the air outlet channel is provided, and the second suction structure is arranged opposite to the second blowing structure.

[0026] Optionally, the second blowing structure and the first blowing structure are located on the same side of the dust removing device, or the second blowing structure and the first blowing structure are staggered.

[0027] The present invention also provides a battery production line, comprising the above-mentioned laser cutting system.

[0028] The present invention has the following advantages:

[0029] By utilizing the technical solution of the present invention, when the airflow enters from the air inlet channel of the main body, a high-speed upward swirling airflow can be formed in the cyclone cavity, and the edge of the high-speed upward swirling airflow has a relatively high wind speed. Since the side of the cyclone cavity facing the cutting avoidance gap has a first overlapping portion with the cutting avoidance gap, the edge high-speed zone of the high-speed upward swirling airflow can act on the cutting avoidance gap, so that the airflow in the cutting avoidance gap has a relatively fast flow rate. When cutting the material, the high-speed airflow can generate a strong sweeping force, thereby cleaning the impurities such as dust and molten beads generated by cutting from the surface of the material, and the cleaned impurities are discharged from the air outlet channel and collected along with the rising airflow. In the above structure, the edge high-speed zone of the high-speed rising airflow in the cyclone cavity is used to clean the impurities near the cutting avoidance gap, so that the cleaning effect is better and the efficiency is higher. Therefore, the present invention solves the defects of poor cleaning effect and low efficiency of the dust removal system of the pole piece laser cutting in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of an embodiment of a dust removal device of the present invention is shown;

[0032] Figure 2 Shows Figure 1 A schematic side view of the dust removal device;

[0033] Figure 3 Shows Figure 2 AA section view;

[0034] Figure 4 Shows Figure 3 A schematic diagram of the structure of the cyclone chamber of the medium dust removal device;

[0035] Figure 5 Shows Figure 1 Schematic diagram of the positions of the two cyclone chambers and the cutting gap of the dust removal device;

[0036] Figure 6 Shows Figure 1 A schematic structural diagram of the first overlapping portion of the middle dust removal device;

[0037] Figure 7 Shows Figure 1 A schematic diagram of the structure of the second overlapping part of the middle dust removal device;

[0038] Figure 8 Shows Figure 1 A schematic diagram of the structure of a first form of a cyclone chamber of a medium dust removal device;

[0039] Fig. 9 Shows Figure 1 A schematic diagram of the structure of the second form of the cyclone chamber of the medium dust removal device;

[0040] Fig.10 Shows Figure 1 A schematic diagram of the structure of a third form of the cyclone chamber of the medium dust removal device;

[0041] Fig.11 Shows Figure 1 A schematic diagram of the structure of a fourth form of the cyclone chamber of the medium dust removal device;

[0042] Fig.12 Shows Figure 1 A schematic structural diagram of a first air inlet method of a cyclone chamber of a medium dust removal device;

[0043] Fig.13 Shows Figure 1 A schematic diagram of the structure of a second air inlet method of the cyclone chamber of a medium dust removal device;

[0044] Fig.14 Shows Figure 1 A schematic diagram of the structure of a second air inlet method of the cyclone chamber of a medium dust removal device;

[0045] Fig.15 Shows Figure 1 A schematic diagram of the structure of a second air inlet method of the cyclone chamber of a medium dust removal device;

[0046] Fig.16 Shows Figure 1 Schematic diagram of the inclined setting of the cutting avoidance gap of the dust removal device;

[0047] Fig.17 Shows Figure 1 Schematic diagram of the inclined setting of the cutting avoidance gap of the dust removal device;

[0048] Fig.18 A schematic structural diagram of a laser cutting system of the present invention is shown;

[0049] Fig.19 Shows Fig.18 A schematic diagram of the structure of the first blowing structure and the first suction structure of the laser cutting system;

[0050] Fig. 20 Shows Fig.18 A schematic diagram of the structure of the second blowing structure and the second suction structure of the laser cutting system;

[0051] Fig.21 Shows Fig.18 A schematic diagram of a structure in which the first blowing structure and the second blowing structure of the laser cutting system are in the same position;

[0052] Fig. 22 A schematic diagram showing a cylindrical cyclone cavity interpenetrating with a cutting avoidance gap;

[0053] Fig.23 A schematic diagram showing a cyclone cavity that is conical and interpenetrates with a cutting avoidance gap when the upper end is inclined;

[0054] Fig.24 A schematic diagram is shown in which the cyclone cavity is conical and the lower end is tilted so as to be interconnected with the cutting avoidance gap.

[0055] Description of reference numerals:

[0056] 1. First overlapping part; 2. Second overlapping part; 10. Main body; 11. Cutting avoidance gap; 20. Cyclone cavity; 21. First cavity group; 22. Second cavity group; 30. Air inlet channel; 31. Through port; 32. Reduced diameter section; 40. Air outlet channel; 100. Cutting table; 200. Dust removal device; 300. Laser; 400. First blowing structure; 500. First suction structure; 600. Second blowing structure; 700. Second suction structure. DETAILED DESCRIPTION

[0057] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0061] In the battery production process, the metal foil coated with active materials needs to be cut into blocks to form pole pieces. Strip cutting methods include laser cutting and hardware cutting. Among them, laser cutting of pole pieces is widely used in the cutting process of pole pieces due to its high efficiency. However, pole pieces are prone to dust and molten beads during the laser cutting process. If they are not cleaned in time, it will directly affect the accuracy of laser cutting and the quality of pole pieces.

[0062] In the prior art, the dust collection method during the laser cutting of the pole piece adopts negative pressure airflow adsorption, or positive pressure air knife blowing along a fixed flow channel. These dust collection methods not only have low collection efficiency, but also incomplete dust cleaning, making it easy for dust to attach to the pole piece and enter the subsequent process, and the cleaning effect of the molten beads generated during the cutting process is not effective, affecting the production quality and performance of lithium batteries.

[0063] The applicant discovered through a large number of experiments in production practice that the fundamental reason for the above problems is that whether using negative pressure adsorption of a dust hood or wind knife blowing, the airflow will only produce a higher wind speed at the edge, and cannot generate a large suction or blowing force in the entire cutting position, ultimately resulting in poor dust removal effect.

[0064] In order to solve the above technical problems, the applicant provides a dust removal device and applies it to the laser cutting of pole pieces in battery production, as follows.

[0065] like Figures 1 to 4 ,as well as Figure 6As shown, an embodiment of the dust removal device according to the present application includes a main body 10 and a cyclone cavity 20. The main body 10 is used to cover the material to be cut, and a cutting avoidance gap 11 is provided on the main body 10. The cutting avoidance gap 11 passes through the surface of the main body 10 facing the material to be cut and the surface away from the material to be cut. The cyclone cavity 20 is arranged in the main body 10, and an air inlet channel 30 and an air outlet channel 40 connected to the cyclone cavity 20 are provided on the main body 10. The cyclone cavity 20 passes through the surface of the main body 10 facing the material to be cut. Furthermore, the side of the cyclone cavity 20 facing the cutting avoidance gap 11 has a first overlapping portion 1 with the cutting avoidance gap 11.

[0066] By using the technical solution of this embodiment, when the airflow enters from the air inlet channel 30 of the main body 10, a high-speed upward cyclonic airflow can be formed in the cyclone cavity 20, and the edge of the high-speed upward cyclonic airflow has a relatively high wind speed. Since the side of the cyclone cavity 20 facing the cutting avoidance gap 11 has a first overlapping portion with the cutting avoidance gap 11, the edge high-speed zone of the high-speed upward cyclonic airflow can act on the cutting avoidance gap 11, so that the airflow in the cutting avoidance gap 11 has a relatively fast flow rate. When cutting the material, the high-speed airflow can generate a strong sweeping force, thereby cleaning the impurities such as dust and molten beads generated by cutting from the surface of the material, and the cleaned impurities are discharged from the air outlet channel 40 with the rising airflow and collected. In the above structure, the edge high-speed zone of the high-speed rising airflow in the cyclone cavity is used to clean the impurities near the cutting avoidance gap 11, and the cleaning effect is better and the efficiency is higher. Therefore, this embodiment solves the defects of poor cleaning effect and low efficiency of the dust removal system of the pole piece laser cutting in the prior art.

[0067] It should be noted that the main body 10 in this embodiment is in the shape of a cover. In some implementation methods not shown, the main body 10 may also be in other shapes, such as a plate, a sheet, etc.

[0068] like Figure 1 As shown, the main body 10 is used to cover the material to be cut, and has a cutting avoidance gap 11. Figure 1 From the above-mentioned direction, the cutting avoidance gap 11 passes through the upper and lower surfaces of the main body 10. The cutting avoidance gap 11 means that the cutting tool can pass through the cutting avoidance gap 11 and act on the material to be cut, thereby achieving cutting of the material to be cut.

[0069] Furthermore, the cutting jig can be laser cutting, metal cutting, etc.

[0070] Furthermore, the material to be cut in this embodiment is a pole piece strip. Of course, the material to be cut may also be other materials.

[0071] like Figures 2 to 4 ,as well as Figure 6As shown, in this embodiment, a cyclone cavity 20 is provided in the main body 10, and an air inlet channel 30 and an air outlet channel 40 are provided on the main body 10, both of which are connected to the cyclone cavity 20. Therefore, airflow can enter the cyclone cavity 20 from the air inlet channel 30, and then be discharged from the air outlet channel 40.

[0072] Combination Figure 4 It can be seen that the cross section of the cyclone cavity 20 is circular, and the air inlet channel 30 enters the cyclone cavity 20 tangentially. Therefore, the airflow can form a high-speed upward swirling airflow in the cyclone cavity 20, similar to the form of a tornado, such as Figure 4 The airflow direction is shown schematically.

[0073] Further, in the high-speed upward swirling airflow in the cyclone cavity 20, the airflow velocity at the edge position is the largest, so that the side of the cyclone cavity 20 facing the cutting avoidance gap 11 has a first overlapping portion 1 with the cutting avoidance gap 11, or, as can be understood by those skilled in the art, the cutting avoidance gap 11 penetrates the side of the cyclone cavity 20 facing the cutting avoidance gap 11. In this way, the edge high-speed area of ​​the high-speed upward swirling airflow can act on the cutting avoidance gap 11, so that the cutting avoidance gap 11 has a strong purge airflow as a whole.

[0074] During the cutting process, impurities such as dust and molten beads generated by cutting are blown away from the surface of the pole piece by the high-speed airflow, then move upward by the action of the high-speed upward swirling airflow, and finally discharged through the air outlet channel 40 and collected.

[0075] like Figure 6 As shown, preferably, the edge of the cyclone cavity 20 coincides with the cutting avoidance gap 11 .

[0076] Combination Figure 6 In the content shown, the edge of the cyclone cavity 20 refers to the edge structure of the cyclone cavity 20 when the slit 11 is not cut through. Figure 6 As shown, the portion of the cyclone cavity 20 that is cut to allow the gap 11 to penetrate is indicated by a dotted line. Figure 6 Indicated by diagonal shading.

[0077] The following is further combined Figure 22 to Figure 24 To understand the meaning of the above “the edge of the cyclone cavity 20 coincides with the cutting avoidance gap 11”. Figure 22 to Figure 24 In the figure, the dotted line on the left side is the edge of the cutting avoidance gap 11 before the cyclone cavity 20 and the cutting avoidance gap 11 are not interconnected; the dotted line on the right side is the edge of the cyclone cavity 20 before the cyclone cavity 20 and the cutting avoidance gap 11 are not interconnected.

[0078] from Fig. 22It can be seen that when the cyclone cavity 20 is a cylindrical structure with equal cross-sectional shapes, and the axis of the cyclone cavity 20 is arranged vertically, the cutting avoidance gap 11 will penetrate the side of the cyclone cavity 20 close to the cutting avoidance gap 11, thereby forming Fig. 22 The first overlapping portion 1 is shown. And the first overlapping portion extends from the upper side to the lower side of the cyclone cavity 20 along the axial direction of the cyclone cavity 20.

[0079] from Fig.23 It can be seen that when the cyclone cavity 20 is a conical structure, and the upper side of the axis of the cyclone cavity 20 is inclined toward the cutting avoidance gap 11, the cutting avoidance gap 11 will penetrate the upper side of the cyclone cavity 20 close to the cutting avoidance gap 11, thereby forming Fig.23 The first overlapped portion 1 is shown. And the first overlapped portion is only distributed on the upper side of the cyclone cavity 20.

[0080] from Fig.24 It can be seen that when the cyclone cavity 20 is a conical structure and the lower side of the axis of the cyclone cavity 20 is inclined toward the cutting avoidance gap 11, the cutting avoidance gap 11 will penetrate the lower side of the cyclone cavity 20 close to the cutting avoidance gap 11, thereby forming Fig.24 The first overlapped portion 1 is shown. And the first overlapped portion is only distributed at the lower side of the cyclone cavity 20.

[0081] The advantage of such a setting is that the air flow velocity is the largest at the edge of the cyclone cavity 20. By making the edge of the cyclone cavity 20 coincide with the cutting avoidance gap 11, it can ensure that the part with the largest air flow velocity in the high-speed cyclone airflow acts on the cutting avoidance gap 11, thereby ensuring that a high-speed airflow blows through the cutting avoidance gap 11 and ensuring the cleaning effect.

[0082] like Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, there are multiple cyclone cavities 20. The multiple cyclone cavities 20 can be arranged at intervals along the extension direction of the cutting avoidance gap 11. Since the cutting avoidance gap 11 in this embodiment is relatively long, multiple cyclone cavities 20 are arranged along the extension direction of the cutting avoidance gap 11. Among them, the edge of each cyclone cavity 20 overlaps with the cutting avoidance gap 11.

[0083] Such arrangement enables high-speed airflow to pass through each of the long strip-shaped cutting avoidance gaps 11, thereby ensuring the dust removal effect on the entire cutting line.

[0084] In some embodiments not shown, if the cutting avoidance gap 11 is short, providing only one cyclone cavity 20 is also a feasible embodiment.

[0085] like Figure 2 and Figure 3 As shown, in the multiple cyclone cavities 20, two groups may be distributed on both sides of the cutting avoidance gap 11.

[0086] Such arrangement enables more cyclone cavities 20 to be arranged on both sides of the cutting avoidance gap 11. The high-speed airflow at the edge of each cyclone cavity 20 acts on the cutting avoidance gap 11 to form a strong sweeping force, thereby ensuring the dust removal effect.

[0087] like Figure 3 to Figure 4 As shown, in the technical solution of this embodiment, the multiple cyclone cavities 20 include a first cavity group 21 and a second cavity group 22. The first cavity group 21 and the second cavity group 22 are distributed on both sides of the cutting avoidance gap 11. The first cavity group 21 includes multiple cyclone cavities 20, and the second cavity group 22 includes multiple cyclone cavities 20.

[0088] from Figure 3 It can be seen that the first cavity group 21 and the second cavity group 22 are distributed on both sides of the cutting avoidance gap 11. The first cavity group 21 includes a plurality of cyclone cavities 20, and the plurality of cyclone cavities 20 of the first cavity group 21 are arranged at intervals along the extension direction of the cutting avoidance gap 11. The second cavity group 22 includes a plurality of cyclone cavities 20, and the plurality of cyclone cavities 20 of the second cavity group 22 are arranged at intervals along the extension direction of the cutting avoidance gap 11.

[0089] from Figure 4 It can also be seen that in the multiple first cavity groups 21 , the edge of each cyclone cavity 20 coincides with the cutting avoidance gap 11 .

[0090] from Figure 4 It can also be seen that in the plurality of second cavity groups 22 , the edge of each cyclone cavity 20 coincides with the cutting avoidance gap 11 .

[0091] Such an arrangement enables as many cyclone cavities 20 as possible to be distributed on both sides of the cutting avoidance gap 11, so that the air flow velocity at the cutting avoidance gap 11 can be as large as possible, thereby ensuring the dust removal effect.

[0092] like Figure 3 and Figure 4As shown, in the technical solution of this embodiment, the multiple cyclone cavities 20 of the first cavity group 21 and the multiple cyclone cavities 20 of the second cavity group 22 are staggered along the extension direction of the cutting avoidance gap 11. And along the extension direction of the cutting avoidance gap 11, the cyclone cavities 20 of the first cavity group 21 and the cyclone cavities 20 of the second cavity group 22 are arranged in sequence, that is, the arrangement of "... cyclone cavity 20 of the first cavity group 21-cyclone cavity 20 of the second cavity group 22-cyclone cavity 20 of the first cavity group 21-cyclone cavity 20 of the second cavity group 22..." is formed.

[0093] Such a configuration can ensure that in the extension direction of the entire cutting avoidance gap 11, there is an overlapping part with the cyclone cavity 20 at each location, that is, the above-mentioned first overlapping part 1, thereby ensuring the uniformity of the airflow of the entire cutting avoidance gap 11 and preventing the situation where the blowing force at certain positions is weak, resulting in impurities that cannot be cleaned away.

[0094] like Figure 7 As shown, in the technical solution of this embodiment, the cyclone cavity 20 of the adjacent first cavity group 21 and the cyclone cavity 20 of the second cavity group 22 have a second overlapping portion 2, and the second overlapping portion 2 is connected to the first overlapping portion 1.

[0095] Specifically, when the cyclone cavity 20 is not cut to allow the gap 11 to penetrate, the adjacent cyclone cavities 20 of the first cavity group 21 and the cyclone cavities 20 of the second cavity group 22 have a second overlapping portion 2. Figure 7 The shaded portion shown in is the second overlapping portion 2 mentioned above.

[0096] Furthermore, by providing the above-mentioned second overlapping portion 2, the high-speed airflows of the adjacent cyclone cavities 20 intersect in the second overlapping portion 2, that is, the high-speed airflow is accelerated in the second overlapping portion 2, so the airflow speed is faster.

[0097] Further, from Figures 5 to 7 It can be seen that since the first overlapping part 1 is connected to the second overlapping part 2, the accelerated high-speed airflow can act on the cutting avoidance gap 11, so that the airflow in the cutting avoidance gap 11 is further accelerated, further improving the dust removal effect.

[0098] like Figure 6 As shown, in the technical solution of this embodiment, in the multiple cyclone cavities 20 of the first cavity group 21, the air inlet tangential directions of the air inlet channels 30 in the cyclone cavities 20 are the same.

[0099] from Figure 6It can be seen that in the present embodiment, in the multiple cyclone cavities 20 of the first cavity group 21, the air inlet tangential direction of the air inlet channel 30 in the cyclone cavity 20 is counterclockwise, so as to ensure that the airflow direction applied by each cyclone cavity 20 at the cutting avoidance gap 11 is the same. Figure 6 The direction from left to right.

[0100] In some embodiments not shown, in the multiple cyclone cavities 20 of the first cavity group 21, the wind inlet tangential directions of the air inlet channels 30 in the cyclone cavities 20 may also be partially the same. That is, in the multiple cyclone cavities 20, the wind direction of some is clockwise, and the wind direction of the other parts is counterclockwise.

[0101] from Figure 6 It can be seen that in the present embodiment, in the multiple cyclone cavities 20 of the second cavity group 22 , at least some of the air inlet channels 30 have the same air inlet tangential direction in the cyclone cavities 20 .

[0102] from Figure 6 It can be seen that in the present embodiment, in the multiple cyclone cavities 20 of the second cavity group 22, the air inlet tangential direction of the air inlet channel 30 in the cyclone cavity 20 is clockwise, thereby ensuring that the airflow direction applied by each cyclone cavity 20 at the cutting avoidance gap 11 is the same. Figure 6 The direction from left to right.

[0103] In some embodiments not shown, in the multiple cyclone cavities 20 of the second cavity group 22, the wind inlet tangential directions of the air inlet channels 30 in the cyclone cavities 20 may also be partially the same. That is, in the multiple cyclone cavities 20, the wind direction of some is clockwise, and the wind direction of the other parts is counterclockwise.

[0104] like Figure 6 As shown, in the technical solution of this embodiment, the tangential direction of the air inlet channel 30 in the cyclone cavity 20 of the first cavity group 21 is opposite to the tangential direction of the air inlet channel 30 in the cyclone cavity 20 of the second cavity group 22.

[0105] In this way, the flow direction of the airflow in the cyclone cavity 20 of the first cavity group 21 at the cutting avoidance gap 11 is the same as the flow direction of the airflow in the cyclone cavity 20 of the second cavity group 22 at the cutting avoidance gap 11. That is, in the second overlapping part 2, the two airflows flow in the same direction, which has an effect of accelerating the airflow.

[0106] from Figure 6 and Figure 7It can be seen that in this embodiment, in the multiple cyclone cavities 20 of the first cavity group 21, the tangential direction of the air inlet channel 30 in the cyclone cavity 20 is counterclockwise, and in the multiple cyclone cavities 20 of the second cavity group 22, the tangential direction of the air inlet channel 30 in the cyclone cavity 20 is clockwise. Figure 7 Left to right direction shown.

[0107] It should be noted that the flow direction of the airflow in the cutting avoidance gap 11 should be consistent with the cutting direction to prevent impurities from being blown onto the upstream material that has been cut.

[0108] like Figures 8 to 11 As shown, in the technical solution of this embodiment, the cyclone cavity 20 of the first cavity group 21 is tilted, and the cyclone cavity 20 of the second cavity group 22 is also tilted, and the inclination direction of the cyclone cavity 20 of the first cavity group 21 and the inclination direction of the cyclone cavity 20 of the second cavity group 22 are symmetrically arranged relative to the cutting avoidance gap 11.

[0109] Specifically, the axis of the cyclone chamber 20 can be vertically arranged or inclined. Figures 8 to 11 The illustrated case is that the axis of the cyclone chamber 20 is inclined.

[0110] Figures 8 to 11 In the content shown, the upper side view is a bottom view, and the lower side view is a cross-sectional view.

[0111] like Figure 8 and Fig.10 The upper side of the axis of the cyclone cavity 20 is shown to be inclined toward the cutting avoidance gap 11. In this embodiment, the upper side of the cyclone cavity 20 is communicated with the cutting avoidance gap 11.

[0112] like Fig. 9 and Fig.11 The figure shows a situation where the lower side of the axis of the cyclone cavity 20 is inclined toward the cutting avoidance gap 11. In this embodiment, the lower side of the cyclone cavity 20 is communicated with the cutting avoidance gap 11.

[0113] like Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, there are multiple air inlet channels 30 and multiple air outlet channels 40, and the multiple air inlet channels 30 are arranged in a one-to-one correspondence with the multiple cyclone cavities 20, and the multiple air outlet channels 40 are arranged in a one-to-one correspondence with the multiple cyclone cavities 20, that is, the air inlet and air outlet of each cyclone cavity 20 are independent.

[0114] Furthermore, the air inlet control of the multiple cyclone cavities 20 is preferably such that the corresponding cyclone cavity 20 is opened at the cutting position during the cutting process of the cutting jig. The reason is that if the cyclone cavity 20 corresponding to the material that has been cut upstream is opened, the airflow will easily cause the material to shake or even be damaged; the uncut material downstream will not produce impurities such as dust and molten beads, so there is no need to open the cyclone cavity 20. Therefore, preferably, among the multiple cyclone cavities 20, only the corresponding cyclone cavity 20 is opened at the cutting position of the cutting jig for blowing.

[0115] In order to achieve the above air intake control, the following two structural methods can be adopted:

[0116] One is that multiple air inlet channels 30 are uniformly fed with air, and a switch structure is provided at each air inlet channel 30. For example, an air inlet cover can be provided outside all the air inlet channels 30, that is, multiple air inlet channels 30 are fed with air at the same time, but only the switch structure of the cyclone cavity 20 where the cutting jig moves is opened, and the switch structures of the cyclone cavities 20 at other positions are not opened, so that only the cutting position is blown.

[0117] Optionally, the switch structure may be a solenoid valve, a solenoid switch, or the like.

[0118] Another method is that multiple air inlet channels 30 independently inlet air. That is, the dust removal device also includes multiple air inlet pipelines, and the multiple air inlet pipelines are connected to the multiple air inlet channels 30 one by one. When the cutting jig moves, only the air inlet channel of the cyclone cavity 20 at the cutting position inlets air, and the air inlet channels 30 of the cyclone cavity 20 at other positions do not inlet air, so that only the cutting position is blown.

[0119] Furthermore, the space inside the cyclone cavity 20 is cylindrical, or the space inside the cyclone cavity 20 is conical. Figures 8 to 11 As shown, the space inside the cyclone cavity 20 is in a cone shape.

[0120] And preferably, along the direction away from the material to be cut, the flow area of ​​the cyclone cavity 20 gradually increases, that is, the space in the cyclone cavity 20 is larger at the top and smaller at the bottom.

[0121] Such arrangement makes it easy for the airflow in the cyclone cavity 20 to form a tornado-like high-speed rising airflow, so that the edge position has a higher flow velocity. In addition, the airflow has a greater rising force, so that impurities such as dust and molten beads can be easily blown away from the surface of the material.

[0122] like Figures 8 to 11 As shown, in the technical solution of this embodiment, the air inlet channel 30 forms a through opening 31 on the inner wall of the cyclone cavity 20 , and the through opening 31 is located on one side of the cyclone cavity 20 on which the material to be cut is located.

[0123] Figure 8 and Fig. 9 The content shown is the situation where the through opening 31 is located at the bottom of the cyclone cavity 20 . This is a preferred embodiment, which can quickly form a high-speed upward cyclonic airflow in the cyclone cavity 20 .

[0124] Fig.10 and Fig.11 The content shown is the situation where the opening 31 is located in the middle of the cyclone cavity 20, which is also a feasible implementation method, which can prevent the intake air from blowing directly onto the surface of the material and alleviate the shaking of the material.

[0125] Figures 12 to 15 Different forms of the air inlet channel 30 are shown. Specifically,

[0126] Fig.12 The figure shows a situation where the opening 31 of the air inlet passage 30 is directly formed on the inner wall of the cyclone cavity 20 .

[0127] Fig.13 It is shown that the opening 31 of the air inlet channel 30 is formed on the inner wall of the cyclone cavity 20, and the gap between the main body 10 and the material to be cut also forms the air inlet channel 30. This embodiment increases the air inlet flow rate.

[0128] Fig.14 The embodiment shows a situation where the air inlet channel 30 is formed only in the gap between the main body 10 and the material to be cut. This embodiment can ensure that the air inlet position is located at the lowest position of the cyclone cavity 20 .

[0129] Fig.15 The figure shows the situation that the air inlet channel 30 passes through the surface of the main body 10 facing the material to be cut. In this embodiment, the air inlet channel 30 can be ensured to have a large flow area and the air inlet position can be ensured to be located at the lowest position of the cyclone cavity 20. Preferably, a reduced diameter section 32 is provided on the side of the air inlet channel 30 close to the cyclone cavity 20, so that the air inlet channel 30 forms a venturi tube structure, so that the air flow velocity suddenly increases at the reduced diameter section 32, that is, the air flow velocity entering the cyclone cavity 20 is fast, and the air flow velocity at the cutting avoidance gap 11 is fast, so as to ensure the dust removal effect.

[0130] Of course, in other forms of the air inlet channel 30 , a reduced diameter section 32 may also be provided.

[0131] like Figure 1 and Figure 2 As shown, the main body 10 is in the shape of a long strip. Taking the cutting of the pole piece as an example, the extension direction of the main body 10 is perpendicular to the extension direction of the pole piece. According to different cutting methods of the pole piece, the cutting avoidance gap 11 can be set in the following manners.

[0132] like Fig.17As shown, when the pole pieces stop relatively below the main body 10 (including both being stationary and both moving synchronously), the extension direction of the cutting avoidance gap 11 is parallel to the extension direction of the main body 10 .

[0133] like Fig.16 As shown, when the pole piece moves relatively below the main body 10 (including only the pole piece moves, only the main body 10 moves, or the two do not move synchronously), that is, when the pole piece needs to be "catch-up cut", the extension direction of the cutting avoidance gap 11 has a preset angle with the extension direction of the main body 10. That is, the cutting avoidance gap 11 is set at an angle.

[0134] According to the different shapes of the material to be cut, the cutting avoidance gap 11 can be selected as a straight line, a curve, or a combination of a straight line and a curve. And the cutting avoidance gap 11 can be a regular shape or an irregular shape.

[0135] like Fig.18 As shown, the present application also provides a laser cutting system, and the embodiment of the laser cutting system according to the present application includes a cutting table 100, the above-mentioned dust removal device 200 and a laser 300. The dust removal device 200 is arranged on the cutting table 100, and the laser 300 is arranged above the dust removal device.

[0136] Optionally, the laser cutting system is used to cut the pole piece. Of course, the laser cutting system can also be used to cut other materials.

[0137] When cutting the pole piece, the laser 300 emits a laser, and the laser acts on the surface of the pole piece strip after cutting the avoidance gap 11, and the laser spot moves, thereby achieving cutting of the pole piece.

[0138] During the cutting process, airflow is introduced into the cyclone cavity 20 through the air inlet channel 30, and the airflow forms a high-speed upward cyclone airflow in the cyclone cavity 20. The edge high-speed area of ​​the high-speed upward cyclone airflow acts on the cutting avoidance gap 11, forming a high-speed airflow in the cutting avoidance gap 11. Therefore, the dust and molten beads generated during the cutting process are blown away from the surface of the electrode by the high-speed airflow, and are driven to rise by the rising airflow, and finally discharged and collected through the air outlet channel 40.

[0139] Optionally, the dust removal device 200 may be movably disposed above the cutting table 100 , or may be fixedly disposed above the cutting table 100 .

[0140] Optionally, the cutting table 100 may be provided with mechanisms such as belts and rollers for rotating the pole pieces.

[0141] Optionally, the cutting table 100 itself can be configured as a movable structure, and when the cutting table 100 moves, it can drive the pole piece to move synchronously.

[0142] Optionally, the dust removal device 200 and the laser 300 may be relatively fixed or their relative positions may be adjustable.

[0143] like Fig.19 As shown, in the technical solution of this embodiment, the laser cutting system further includes a first blowing structure 400 , and the first blowing structure 400 is suitable for blowing air into the gap between the cutting table 100 and the dust removal device 200 .

[0144] Specifically, when cutting the pole piece, laser cutting of metal foil is prone to produce molten beads. If the molten beads cannot be cleaned in time, they will cause the molten beads to adhere to the edge of the pole piece, subsequently increasing the risk of puncturing the diaphragm.

[0145] In this embodiment, by providing the first blowing structure 400, the gap between the cutting table 100 and the dust removal device 200 can be blown, that is, the airflow blows over the surface of the pole piece. During cutting, the molten beads generated by cutting will be blown away by the airflow of the first blowing structure 400 as soon as they are generated, thereby preventing the molten beads from adhering to the pole piece.

[0146] Optionally, the first blowing structure 400 may be an air knife, an air nozzle, or the like.

[0147] like Fig.19 As shown, in the technical solution of this embodiment, the laser cutting system further includes a first air suction structure 500 , and the first air suction structure 500 is arranged opposite to the first air blowing structure 400 .

[0148] Specifically, the first air suction structure 500 can collect the molten beads blown away by the first air blowing structure 400 .

[0149] In some embodiments not shown, the molten beads blown away by the first blowing structure 400 can also be directly driven to the air outlet channel 40 through the rising airflow in the cyclone cavity 20. In this case, not providing the first suction structure 500 is also a feasible embodiment.

[0150] like Fig. 20 As shown, in the technical solution of this embodiment, the laser cutting system also includes a second blowing structure 600 and a second suction structure 700. The second blowing structure 600 is used to blow air toward the surface of the main body 10 where the air outlet channel 40 is provided, and the second suction structure 700 is arranged opposite to the second blowing structure 600.

[0151] Specifically, impurities such as dust and molten beads that are driven upward in the cyclone cavity 20 are discharged through the air outlet channel 40, and then the second blowing structure 600 blows these impurities to the direction of the second suction structure 700, and the negative pressure generated by the second suction structure 700 collects the impurities.

[0152] Optionally, since in this embodiment, each air outlet channel 40 is located on the upper surface of the main body 10 , the second blowing structure 600 is used to blow air toward the upper surface of the main body 10 .

[0153] In one embodiment, the second blowing structure 600 and the first blowing structure 400 are staggered. For example, the two can be staggered by 90° in the circumferential direction.

[0154] like Fig.21 As shown, in the technical solution of this embodiment, the second blowing structure 600 and the first blowing structure 400 are also located on the same side of the dust removal device 200. The first blowing structure 400 and the second blowing structure 600 can be integrated together and share a blowing device, or an air guide plate can be installed at the blowing port of a blowing device, so that the airflow blows through the gap between the cutting table 100 and the dust removal device 200, and blows through the surface of the main body 10 where the air outlet channel 40 is provided.

[0155] Since the first blowing structure 400 and the second blowing structure 600 are located on the same side, the first suction structure 500 and the second suction structure 700 are also located on the same side. The first suction structure 500 and the second suction structure 700 can be integrated together to share a suction device.

[0156] The present application also provides a battery production line. According to an embodiment of the battery production line of the present application, the battery production line includes the above-mentioned laser cutting system.

[0157] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A dust removal device, characterized in that: include: A main body (10) is used to cover a material to be cut, and a cutting avoidance gap (11) is provided on the main body (10), and the cutting avoidance gap (11) penetrates a surface of the main body (10) facing the material to be cut and a surface away from the material to be cut; A cyclone cavity (20) is arranged in the main body (10); an air inlet channel (30) and an air outlet channel (40) connected to the cyclone cavity (20) are arranged on the main body (10); the cyclone cavity (20) penetrates the surface of the main body (10) facing the material to be cut; and a side of the cyclone cavity (20) facing the cutting avoidance gap (11) has a first overlapping portion (1) with the cutting avoidance gap (11).

2. The dust removal device according to claim 1, characterized in that: The edge of the cyclone cavity (20) coincides with the cutting avoidance gap (11).

3. The dust removal device according to claim 1, characterized in that: There are a plurality of cyclone cavities (20), wherein the plurality of cyclone cavities (20) are arranged at intervals along the extension direction of the cutting avoidance gap (11); and / or the plurality of cyclone cavities (20) are distributed on both sides of the cutting avoidance gap (11).

4. The dust removal device according to claim 3, characterized in that: The multiple cyclone cavities (20) include a first cavity group (21) and a second cavity group (22); the first cavity group (21) and the second cavity group (22) are distributed on both sides of the cutting avoidance gap (11); the first cavity group (21) includes the multiple cyclone cavities (20); and the second cavity group (22) includes the multiple cyclone cavities (20).

5. The dust removal device according to claim 4, characterized in that: The multiple cyclone cavities (20) of the first cavity group (21) and the multiple cyclone cavities (20) of the second cavity group (22) are staggered in the extension direction of the cutting avoidance gap (11).

6. The dust removal device according to claim 4, characterized in that: The adjacent cyclone chambers (20) of the first chamber group (21) and the cyclone chambers (20) of the second chamber group (22) have a second overlapping portion (2), and the second overlapping portion (2) is connected to the first overlapping portion (1).

7. The dust removal device according to any one of claims 4 to 6, characterized in that: In the multiple cyclone cavities (20) of the first cavity group (21), at least some of the air inlet channels (30) have the same air inlet tangential direction in the cyclone cavity (20); or, in the multiple cyclone cavities (20) of the second cavity group (22), at least some of the air inlet channels (30) have the same or opposite air inlet tangential direction in the cyclone cavity (20).

8. The dust removal device according to any one of claims 4 to 6, characterized in that: The tangential direction of air inlet through the air inlet channel (30) in the cyclone cavity (20) of the first cavity group (21) is opposite to the tangential direction of air inlet through the air inlet channel (30) in the cyclone cavity (20) of the second cavity group (22).

9. The dust removal device according to any one of claims 4 to 6, characterized in that: The first cavity group (21) and the second cavity group (22) are both arranged at an inclination, and the inclination direction of the cyclone cavity (20) of the first cavity group (21) and the inclination direction of the cyclone cavity (20) of the second cavity group (22) are arranged symmetrically relative to the cutting avoidance gap (11).

10. The dust removal device according to any one of claims 4 to 6, characterized in that: There are multiple air inlet channels (30) and multiple air outlet channels (40), and the multiple air inlet channels (30) are arranged in a one-to-one correspondence with the multiple cyclone cavities (20), and the multiple air outlet channels (40) are arranged in a one-to-one correspondence with the multiple cyclone cavities (20), wherein: Each of the air inlet channels (30) is provided with a switch structure; and / or, It also comprises a plurality of air inlet pipelines, wherein the plurality of air inlet pipelines are connected to the plurality of air inlet channels (30) in a one-to-one correspondence.

11. The dust removal device according to claim 1, characterized in that: The space inside the cyclone cavity (20) is cylindrical, or the space inside the cyclone cavity (20) is conical, and the flow area of ​​the cyclone cavity (20) gradually increases in a direction away from the material to be cut.

12. The dust removal device according to claim 1, characterized in that: The air inlet channel (30) has an opening (31) formed on the inner wall of the cyclone cavity (20), and the opening (31) is located on a side of the cyclone cavity (20) close to the material to be cut.

13. The dust removal device according to claim 1, characterized in that: The cyclone chamber (20) is arranged vertically or inclined.

14. The dust removal device according to claim 1, characterized in that: A reduced diameter section (32) is provided on one side of the air inlet channel (30) close to the cyclone chamber (20).

15. The dust removal device according to claim 1, characterized in that: The air inlet channel (30) passes through the surface of the main body (10) facing the material to be cut.

16. The dust removal device according to claim 1, characterized in that: The main body (10) is in the shape of an elongated strip, and the extending direction of the cutting avoidance slit (11) is parallel to the extending direction of the main body (10), or the extending direction of the cutting avoidance slit (11) and the extending direction of the main body (10) have a preset angle.

17. The dust removal device according to claim 1, characterized in that: The cutting avoidance gap (11) is a straight line, or a curve, or a combination of a straight line and a curve.

18. A laser cutting system, characterized in that: include: Cutting table (100); A dust removal device (200) is arranged on the cutting table (100), and the dust removal device (200) is the dust removal device according to any one of claims 1 to 17; A laser (300) is arranged above the dust removal device.

19. The laser cutting system according to claim 18, characterized in that: The laser cutting system further comprises a first blowing structure (400), wherein the first blowing structure (400) is suitable for blowing air toward a gap between the cutting table (100) and the dust removal device (200).

20. The laser cutting system according to claim 19, characterized in that: The laser cutting system further comprises a first air suction structure (500), wherein the first air suction structure (500) is arranged opposite to the first air blowing structure (400).

21. The laser cutting system according to claim 19, characterized in that: The laser cutting system further comprises a second blowing structure (600) and a second suction structure (700), wherein the second blowing structure (600) is used to blow air toward the surface of the main body (10) on which the air outlet channel (40) is provided, and the second suction structure (700) is arranged opposite to the second blowing structure (600).

22. The laser cutting system according to claim 21, characterized in that: The second blowing structure (600) and the first blowing structure (400) are located on the same side of the dust removal device (200), or the second blowing structure (600) and the first blowing structure (400) are staggered.

23. A battery production line, characterized in that: Comprising a laser cutting system as claimed in any one of claims 18 to 22.

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