Air knife box, air knife assembly, welding device and battery production system

Abstract

The utility model provides an air knife box, an air knife assembly, a welding device and a battery production system. The air knife box comprises an annular side wall which comprises a first side wall and a second side wall which are oppositely arranged; the top wall is connected to one end of the annular side wall; the first bottom wall is connected to the other end of the annular side wall; wherein the top wall is provided with a first through hole, and the first bottom wall is provided with a second through hole; the first through hole and the second through hole are at least partially overlapped; the first side wall is provided with an air blowing port; the second side wall has an air suction port. The air knife box is located between the laser assembly and the dust removal cover. In the working process of the laser assembly, laser beams pass through the first through hole and the second through hole of the air knife box to weld a battery cell, part of welding slag in the welding process is sucked away by the dust removal cover, and further, the welding slag which is not sucked away is blocked by an air knife formed by the air knife box after getting close to the air knife box or sucked away by the air suction port after entering the air knife box. Welding slag and dust generated in the welding process are thoroughly pumped away, and the laser protection lens is effectively prevented from being polluted.

Description

Technical Field

[0001] The utility model relates to the technical field of laser processing, in particular to an air knife box, an air knife component, a welding device and a battery production system. Background Art

[0002] In the field of laser processing technology, during the laser processing process, the optical lens inside the equipment is easily contaminated by the smoke or dust generated during the processing, causing damage to the expensive lens, performance degradation or affecting the processing effect. Therefore, dust protection of the lens in laser processing equipment is an issue that cannot be ignored.

[0003] In the prior art, an exhaust device is provided outside the laser welding area, and the exhaust device is directly connected to an external exhaust pump. However, this method often has some shortcomings, such as poor dust removal efficiency, inability to fully process dust, and dust is generated quickly and easily adheres to the surface of objects and is difficult to clean. Utility Model Content

[0004] The main technical problem solved by this application is that the dust removal efficiency is poor and the dust cannot be fully processed.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a wind knife box, which includes: an annular side wall, including a first side wall and a second side wall arranged opposite to each other; a top wall, connected to one end of the annular side wall; a first bottom wall, connected to the other end of the annular side wall; wherein the top wall has a first through hole, and the first bottom wall has a second through hole; the first through hole and the second through hole at least partially overlap; the first side wall has an air blowing port; and the second side wall has an air suction port.

[0006] In one embodiment, the first side wall and the second side wall are arranged opposite to each other along a first direction X; the top wall and the first bottom wall are arranged opposite to each other along a second direction Z; the blowing port extends along a third direction; the length of the blowing port along the third direction is respectively greater than the maximum width of the first through hole along the third direction and the maximum width of the second through hole along the third direction; the first direction, the second direction and the third direction intersect with each other.

[0007] In one embodiment, the length of the blowing port along the third direction is greater than 5 times the width of the blowing port along the second direction.

[0008] In one embodiment, there are multiple air blowing ports, and the multiple air blowing ports are arranged at intervals along the second direction.

[0009] In one embodiment, the number of the blowing ports is two, and the two blowing ports are respectively arranged on two opposite sides of the suction port along the second direction.

[0010] In one embodiment, a width of the blowing port close to the first bottom wall is greater than a width of the blowing port close to the top wall.

[0011] In one embodiment, the inner wall surface of the second side wall has a recessed portion, and the air inlet is located at the bottom of the recessed portion.

[0012] In one embodiment, the wind knife box further includes: a joint fixed to the outer side surface of the second side wall and connected to the air intake port.

[0013] In order to solve the above technical problems, the second technical solution provided in this application is: to provide a wind knife seat, which includes: a wind knife seat body, having a first surface; the first surface has an air guide groove; the groove wall of the air guide groove has an air inlet.

[0014] In one embodiment, a plurality of the air inlets are spaced apart and arranged on the second bottom wall of the air guide groove.

[0015] In one embodiment, the first surface further comprises an edge avoidance groove spaced apart from the air guide groove; the common side wall of the edge avoidance groove and the air guide groove comprises an insertion opening;

[0016] The wind knife seat also includes a cover plate, which is inserted into the air guide groove from the edge avoidance groove and the insertion port, and is spaced apart from a side wall of the air guide groove away from the edge avoidance groove.

[0017] In one embodiment, the insertion port is located at the bottom of a common side wall of the edge avoidance groove and the air guide groove, and the third bottom wall of the edge avoidance groove is coplanar with the second bottom wall of the air guide groove.

[0018] In one embodiment, the third bottom wall of the edge avoidance groove has a plurality of first mounting holes, and the plurality of first mounting holes are arranged at intervals along the extension direction of the edge avoidance groove;

[0019] The cover plate has a plurality of second mounting holes at one end away from the air guide groove, and the plurality of second mounting holes are arranged in one-to-one correspondence with the plurality of first mounting holes; along the direction in which the cover plate is inserted from the insertion port, the length of the second mounting holes is different from the length of the first mounting holes.

[0020] In order to solve the above-mentioned technical problems, the third technical solution provided in the present application is: to provide a wind knife assembly, which includes the above-mentioned wind knife box; the above-mentioned wind knife seat is arranged on the outer side surface of the first side wall of the wind knife box, and the air guide groove covers and is connected to the blowing port.

[0021] In order to solve the above technical problems, the fourth technical solution provided in the present application is: to provide a welding device, which includes: a laser assembly; a welding fixture; a dust hood, which is spaced apart from the laser assembly; and the above-mentioned wind knife assembly, which is arranged between the dust hood and the laser assembly; an air blowing device, which is connected to the air inlet of the wind knife seat; and an exhaust device, which is respectively connected to the dust hood and the air intake of the wind knife box.

[0022] In order to solve the above technical problems, the fifth technical solution provided in the present application is: to provide a battery production system, which includes: a battery cell assembly device; and the welding device mentioned above.

[0023] Beneficial effects of the present application: Different from the prior art, the present application provides a wind knife box. The wind knife box includes: an annular side wall, including a first side wall and a second side wall arranged oppositely; a top wall connected to one end of the annular side wall; a first bottom wall connected to the other end of the annular side wall; wherein the top wall has a first through hole, and the first bottom wall has a second through hole; the first through hole and the second through hole at least partially overlap; the first side wall has an air blowing port; and the second side wall has an air suction port. The wind knife box is located between the laser assembly and the dust cover. During the operation of the laser assembly, the laser beam passes through the first through hole and the second through hole of the wind knife box to weld the battery cell, and part of the welding slag in the welding process is sucked away by the dust cover. Furthermore, the welding slag that is not sucked away is blocked by the wind knife formed by the wind knife box after approaching the wind knife box or is sucked away by the air suction port after entering the wind knife box. In this way, the welding slag and dust generated during the welding process are completely removed, effectively preventing the laser protective lens from being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a battery production system provided by an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a welding device provided in one embodiment of the present application;

[0026] Figure 3 This is an overall schematic diagram of an air knife box according to an embodiment of the present application;

[0027] Figure 4 is a cross-sectional view of an air knife box along the AA direction in one embodiment of the present application;

[0028] Figure 5 This is an overall schematic diagram of the wind knife seat from a first perspective according to an embodiment of the present application;

[0029] Figure 6 is an overall schematic diagram of the wind knife seat from a second viewing angle according to an embodiment of the present application;

[0030] Figure 7 This is a disassembly diagram of an air knife seat according to an embodiment of the present application;

[0031] Figure 8 It is a cross-sectional view of the wind knife seat body along the BB direction according to an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1-Battery production system; 2-Battery cell assembly device;

[0034] 3-welding device; 31-laser assembly; 32-welding fixture; 33-dust removal cover; 34-blowing device; 35-exhaust device;

[0035] 4-wind knife assembly; 41-wind knife box; 411-annular side wall; 4111-first side wall; 4111a-blowing port; 4112-second side wall; 4112a-intake port; 4112b-recessed portion; 412-top wall; 4121-first through hole; 413-first bottom wall; 4131-second through hole; 414-first laser channel; 415-connector; 42-wind knife seat; 42a-wind knife seat body; 421-first surface; 422-air guide groove; 4221-second bottom wall; 423-air inlet; 424-edge avoidance groove; 4241-first mounting hole; 4242-third bottom wall; 425-common side wall; 4251-insertion port; 42b-cover plate; 42b1-second mounting hole. DETAILED DESCRIPTION

[0036] 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.

[0037] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0038] 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 application. The appearance of the phrase in various locations 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.

[0039] In the prior art, a primary exhaust device is arranged outside the laser welding area. The primary exhaust device directly removes dust through negative pressure near the weldment. However, since the primary exhaust device cannot completely remove all welding slag, excess welding slag is easy to splash upward, and finally a lot of it adheres to the laser protection lens, which is easy to burn the laser protection lens, directly affecting the laser light output, and causing problems such as poor welds.

[0040] Based on this, the embodiments of the present application provide a wind knife box, a wind knife seat, a wind knife assembly, a welding device and a battery production system; wherein the wind knife box can form a sheet-like wind layer (i.e., a wind knife) between the welding area and the laser protection lens, reducing the probability of welding slag in the welding area reaching the laser protection lens, and further extracting the splashing welding slag generated during the welding process, effectively preventing the problem of laser protection lens contamination. The wind knife box of the present application can be used alone, or it can be used in conjunction with the wind knife seat to form a wind knife assembly. The wind knife assembly can be applied to, but not limited to, laser welding devices, and laser welding devices can be applied to, but not limited to, battery production systems. For example, the laser welding device can be applied to the production system of electronic products.

[0041] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0042] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of a battery production system provided by an embodiment of the present application; Figure 2 It is a schematic diagram of a welding device provided in one embodiment of the present application.

[0043] An embodiment of the present application provides a battery production system 1, which includes a battery cell assembly device 2 and a welding device 3. The battery cell assembly device 2 is used to assemble battery cells, and the welding device 3 is used to weld battery cells. The structure of the battery cell assembly device 2 is not limited, and can be any existing battery cell assembly device. The welding device 3 is arranged downstream of the battery cell assembly device 2.

[0044] Specifically, in one embodiment, the welding device 3 includes a laser assembly 31, a welding fixture 32, a dust hood 33, an air blower 34, an exhaust device 35 and an air knife assembly 4. The laser assembly 31 is used to emit a laser beam to provide an energy source for laser welding. The laser assembly 31 includes a laser (not shown) and a galvanometer (not shown). The welding fixture 32 is used to fix the parts to be welded, such as a battery cell. The dust hood 33 is spaced apart from the laser assembly 31 and is arranged near the welding area of ​​the welding fixture 32. The dust hood 33 is connected to the exhaust device 35. The dust hood 33 is used to suck the welding slag generated during the welding process as a primary dust removal. Specifically, there are two dust hoods 33. The air blower 34 is connected to the air knife assembly 4 to provide a wind source for the air knife assembly 4. There may be one or two exhaust devices 35, one exhaust device 35 is connected to the dust cover 33 and the air knife assembly 4 respectively; or one exhaust device 35 is connected to the dust cover 33, and the other exhaust device 35 is connected to the air knife assembly 4, which is used to provide negative pressure exhaust for the dust cover 33 and the air knife assembly 4. The air knife assembly 4 is arranged between the dust cover 33 and the laser assembly 31, and is used to block welding slag and dust in the welding process, and at the same time suck out excess welding slag to avoid contaminating the laser assembly 31.

[0045] See also Figures 3 to 7 , Figure 3 This is an overall schematic diagram of an air knife box according to an embodiment of the present application; Figure 4 is a cross-sectional view of an air knife box along the AA direction in one embodiment of the present application; Figure 5 This is an overall schematic diagram of the wind knife seat from a first perspective according to an embodiment of the present application; Figure 6 is an overall schematic diagram of the wind knife seat from a second viewing angle according to an embodiment of the present application; Figure 7 It is a disassembly schematic diagram of an air knife seat according to an embodiment of the present application.

[0046] In one embodiment, the wind knife assembly 4 includes a wind knife box 41 and a wind knife seat 42. It can be understood that the wind knife box 41 of the present application can also be used alone.

[0047] The specific structure of the wind knife box 41 is described below.

[0048] In one embodiment, if Figure 3 , Figure 3 It is an overall schematic diagram of a wind knife box according to an embodiment of the present application. The wind knife box 41 includes an annular side wall 411, a top wall 412 and a first bottom wall 413. The annular side wall 411 includes a first side wall 4111 and a second side wall 4112 arranged opposite to each other, the top wall 412 is connected to one end of the annular side wall 411, and the first bottom wall 413 is connected to the other end of the annular side wall 411. Among them, the top wall 412 has a first through hole 4121, and the first bottom wall 413 has a second through hole 4131. The first through hole 4121 and the second through hole 4131 at least partially overlap. The first side wall 4111 has an air blowing port 4111a, and the second side wall 4112 has an air suction port 4112a.

[0049] The first through hole 4121 and the second through hole 4131 at least partially overlap, and the overlapping area constitutes the first laser channel 414. The wind knife box 41 is located between the dust cover 33 and the laser assembly 31, and the first laser channel 414, the dust cover 33 and the laser assembly 31 can be coaxially arranged, so that the laser beam generated by the laser assembly 31 passes through the first laser channel 414, passes through the dust cover 33, and irradiates the workpiece to be welded and welds the workpiece to be welded.

[0050] The first side wall 4111 has a blowing port 4111a, which may be one or more. The blowing port 4111a is connected to the air blowing device 34 and is used to blow air into the wind knife box 41. The airflow passes through the blowing port 4111a to form a wind knife in the wind knife box 41. The wind knife is a sheet-like wind layer formed by the airflow.

[0051] The second side wall 4112 has an air inlet 4112a, which may be one or more than one. The air inlet 4112a is used to communicate with the air extraction device 35, and the air inlet 4112a is used to extract dust from the air knife box.

[0052] As described above, by setting the wind knife box 41 between the dust cover 33 and the laser assembly 31. During the operation of the laser assembly 31, the laser beam passes through the first through hole 4121 and the second through hole 4131 of the wind knife box 41 to weld the battery cell, and a part of the welding slag in the welding process is sucked away by the dust cover 33. Furthermore, the welding slag that is not sucked away is blocked by the wind knife layer formed by the wind knife box 41 after approaching the wind knife box 41 or is sucked away by the air inlet 4112a after entering the wind knife box 41. In this way, the welding slag generated during the welding process is completely sucked away, effectively preventing the laser protection lens from being contaminated.

[0053] In one embodiment, if Figure 3, the first side wall 4111 and the second side wall 4112 are arranged oppositely along the first direction X, the top wall 412 and the first bottom wall 413 are arranged oppositely along the second direction Z, the air outlet 4111a extends along the third direction Y on the first side wall 4111, and the length L1 of the air outlet 4111a along the third direction Y is respectively greater than the maximum width L2 of the first through hole 4121 along the third direction Y and the maximum width of the second through hole 4131 along the third direction Y (not marked in the figure). In this way, the projection of the wind knife blown out from the air outlet 4111a along the second direction Z covers the projection of the first through hole 4121 and the second through hole 4131 along the second direction Z, so that the wind knife can block the welding slag and dust on the galvanometer of the laser that reaches through the first laser channel 414. Among them, the first direction X, the second direction Z and the third direction Y intersect with each other. In the embodiment of the present application, the first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0054] In one embodiment, the length L1 of the air outlet 4111a along the third direction Y is greater than 5 times the width L3 of the air outlet 4111a along the second direction Z. In this way, the air blowing device 34 forms a laminar air flow layer as a flat air knife through the air outlet 4111a.

[0055] The air outlet 4111a may be one or more. In one embodiment, the number of the air outlets 4111a is multiple, and the multiple air outlets 4111a are spaced apart along the second direction Z. The multiple air outlets 4111a are spaced apart in parallel, and preferably, the multiple air outlets 4111a are spaced apart at equal intervals. In the embodiment of the present application, there are specifically two air outlets 4111a. The multiple air outlets 4111a form multiple air knives, which can more effectively reduce the welding slag and dust on the galvanometer of the laser that reaches the laser through the first laser channel 414.

[0056] In one embodiment, if Figure 4 , Figure 4 It is a cross-sectional view of the wind knife box along the AA direction of one embodiment of the present application. There are two air blowing ports 4111a, and the two air blowing ports 4111a are respectively arranged on opposite sides of the air suction port 4112a along the second direction Z. In other words, the second side wall 4112 has an air suction port 4112a, and the projections of the two air blowing ports 4111a on the second side wall 4112 along the first direction X are respectively arranged on opposite sides of the air suction port 4112a along the second direction Z. In this way, the two wind knives formed by the two blowing ports and the outer wall of the wind knife box 41 together form a protective cavity, and the air intake port 4112a is located in the protective cavity. The welding slag and dust that are not blocked by the wind knife pass through the wind knife and enter the wind knife box 41. The air intake port 4112a is connected to the exhaust device 35. The suction force provided by the exhaust device 35 sucks the welding slag and dust through the air intake port 4112a, so that the air intake port 4112a can better collect the welding slag and dust, and discharge the welding slag and dust from the air knife box.

[0057] In one embodiment, the width of the air outlet 4111a near the first bottom wall 413 along the third direction Y (not shown in the figure) is greater than the width of the air outlet 4111a near the top wall 412 along the third direction Y (not shown in the figure), so that under the same power of the blowing device 34, the wind force of the air outlet 4111a near the first bottom wall 413 is smaller than the wind force of the air outlet 4111a near the top wall 412, so that the welding slag and dust raised by the air outlet 4111a near the first bottom wall 413 will not break through the resistance of the wind knife formed by the air outlet 4111a near the top wall 412, so that the welding slag and dust reaching the galvanometer of the laser through the first laser channel 414 can be better reduced.

[0058] In one embodiment, the inner wall surface of the second side wall 4112 has a recessed portion 4112b, and the air inlet 4112a is located at the bottom of the recessed portion 4112b. In this way, the welding slag and dust that are not blocked by the wind knife pass through the wind knife and enter the wind knife box 41. The air inlet 4112a is connected to the exhaust device 35, and the suction force provided by the exhaust device 35 sucks the welding slag and dust through the air inlet 4112a. It can be understood that the recessed portion 4112b can reduce the air flow resistance of the wind knife box 41 along the suction direction, which is convenient for collecting welding slag and dust, and discharging the welding slag and dust from the air knife box.

[0059] In one embodiment, the wind knife box 41 further includes a joint 415 fixed to the outer side of the second side wall 4112 of the wind knife box 41 and connected to the air inlet 4112a. Thus, the joint 415 facilitates the wind knife box 41 to be connected to the exhaust device 35 through the air inlet 4112a.

[0060] In one embodiment, if Figure 5 , Figure 5 4 is an overall schematic diagram of a wind knife seat from a first perspective of an embodiment of the present application. The wind knife seat 42 is arranged on the outer side of the first side wall 4111 of the wind knife box 41, wherein the air guide groove 422 covers and is connected to the air blowing port 4111a. The wind knife seat 42 is connected to the air blowing device 34, and the airflow generated by the air blowing device 34 passes through the wind knife seat 42 and the air blowing port 4111a of the wind knife box 41 into the wind knife box 41.

[0061] The wind blade seat 42 may be one or more. In the embodiment of the present application, the blowing port 4111a of the wind blade box 41 corresponds to the wind blade seat 42 one by one, that is, the number of the blowing port 4111a is the same as the number of the wind blade seat 42. The wind blade seat 42 may be fixed to the outer wall surface of the first side wall 4111 of the wind blade box 41 by screws. A sealing layer material may be provided between the wind blade seat 42 and the wind blade box 41 to strengthen the sealing between the wind blade seat 42 and the wind blade box 41, and prevent the airflow from flowing out from between the wind blade seat 42 and the wind blade box 41.

[0062] The specific structure of the wind knife seat 42 is described below.

[0063] In one embodiment, if Figure 6 , Figure 6 It is an overall schematic diagram of the wind knife seat of an embodiment of the present application from a second perspective. The wind knife seat 42 includes a wind knife seat body 42a, and the wind knife seat body 42a has a first surface 421, and the first surface 421 has an air guide groove 422, and the groove wall of the air guide groove 422 has an air inlet 423. The first surface 421 of the wind knife seat body 42a, that is, the surface of the wind knife seat 42 close to the first side wall 4111, has an air guide groove 422, and the groove wall of the air guide groove 422 has an air inlet 423, and the air inlet 423 is used to communicate with the blowing device 34. The air guide groove 422 is used to buffer the air flow blown in from the blowing device 34 through the air inlet 423 and form sufficient pressure before flowing out from the blowing port 4111a.

[0064] In one embodiment, the length L4 of the air guide groove 422 along the third direction Y is greater than or equal to the length L1 of the air outlet 4111a along the third direction Y, and the width L5 of the air guide groove 422 along the second direction Z is greater than or equal to the width L3 of the air outlet 4111a along the second direction Z. In this way, the air guide groove 422 can cover the air outlet 4111a, and the air flow of the air blowing device 34 entering the air guide groove 422 through the air inlet 423 can be sufficient to cover the air outlet 4111a of the wind knife box 41, so that the air flow forms a wind knife after passing through the air outlet 4111a.

[0065] In one embodiment, a plurality of air inlets 423 are disposed at intervals on the second bottom wall 4221 of the air guide groove 422. The air inlet 423 may be one or more, and the plurality of air inlets 423 are disposed at intervals on the second bottom wall 4221 of the air guide groove 422, and the plurality of air inlets 423 are connected to the air blowing device 34, so that the air blowing device 34 can deliver sufficient airflow into the air guide groove 422 through the plurality of air inlets 423.

[0066] like Figure 7 , Figure 7 4 is a disassembled schematic diagram of a wind blade seat of an embodiment of the present application. In one embodiment, the wind blade seat 42 includes a wind blade seat body 42a and a cover plate 42b. Specifically, the first surface 421 of the wind blade seat 42 also has an edge avoidance groove 424 spaced apart from the air guide groove 422, and the edge avoidance groove 424 and the common side wall 425 of the air guide groove 422 have an insertion port 4251. The cover plate 42b is inserted into the air guide groove 422 from the edge avoidance groove 424 and the insertion port 4251, and is spaced apart from the side wall of the air guide groove 422 away from the edge avoidance groove 424.

[0067] The length of the insertion port 4251 along the third direction Y is greater than or equal to the length of the cover plate 42b along the third direction Y, and the width of the insertion port 4251 along the first direction X is greater than or equal to the width of the cover plate 42b along the first direction X. In this way, it is convenient for the cover plate 42b to be inserted from the insertion port 4251. The cover plate 42b is spaced apart from the side wall of the air guide groove 422 away from the edge avoidance groove 424, and the width of the air guide groove 422 along the second direction Z is adjusted by the spacing, so that the air outlets 4111a of different widths can be matched, or the air volume entering the air outlet 4111a from the air guide groove 422 can be adjusted.

[0068] like Figure 8 , Figure 8 It is a cross-sectional view of the wind blade seat body along the BB direction of an embodiment of the present application. In one embodiment, the insertion port 4251 is located at the bottom of the common side wall 425 of the edge avoidance groove 424 and the air guide groove 422, and the third bottom wall 4242 of the edge avoidance groove 424 is coplanar with the second bottom wall 4221 of the air guide groove 422. The air inlet 423 is arranged at intervals on the second bottom wall 4221 of the air guide groove 422, so that the assembly of the cover plate 42b is convenient; after the cover plate 42b is inserted from the insertion port 4251, the width of the air guide groove 422 can be better adjusted, so as to facilitate the adjustment of the air volume passing through the air guide groove 422.

[0069] In one embodiment, the third bottom wall 4242 of the edge avoidance groove 424 has a plurality of first mounting holes 4241, and the plurality of first mounting holes 4241 are arranged at intervals along the extension direction of the edge avoidance groove 424. The end of the cover plate 42b away from the air guide groove 422 has a plurality of second mounting holes 42b1, and the plurality of second mounting holes 42b1 are arranged one-to-one with the plurality of first mounting holes 4241. In this way, the cover plate 42b can be fixed to the edge avoidance groove 424 by screws to adjust the width of the air guide groove 422. Further, along the direction in which the cover plate 42b is inserted from the insertion port 4251, the length of the second mounting hole 42b1 is different from the length of the first mounting hole 4241. In this way, along the direction in which the cover plate 42b is inserted from the insertion port 4251, the cover plate 42b can be fixed within a certain distance, which is convenient for adjusting the width of the air guide groove 422 and can be matched with the blowing ports 4111a of different widths.

[0070] The present application provides an atomization structure wind knife box 41. The wind knife box 41 includes an annular side wall 411, including a first side wall 4111 and a second side wall 4112 arranged opposite to each other; a top wall 412 connected to one end of the annular side wall 411; a first bottom wall 413 connected to the other end of the annular side wall 411; wherein the top wall 412 has a first through hole 4121, and the first bottom wall 413 has a second through hole 4131; the first through hole 4121 and the second through hole 4131 at least partially overlap; the first side wall 4111 has an air blowing port 4111a; and the second side wall 4112 has an air suction port 4112a. The wind knife box 41 is located between the laser assembly 31 and the dust cover 33. During the operation of the laser assembly 31, the laser beam welds the battery cell through the first through hole 4121 and the second through hole 4131 of the wind knife box 41. A portion of the welding slag during the welding process is sucked away by the dust removal hood 33. Furthermore, the welding slag that has not been sucked away is blocked by the wind knife layer formed by the wind knife box 41 after approaching the wind knife box 41, or is sucked away by the air intake port 4112a after entering the wind knife box 41. In this way, the welding slag and dust generated during the welding process are completely removed, effectively preventing the laser protection lens from being contaminated.

[0071] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A wind knife box, characterized in that: include: An annular side wall, comprising a first side wall and a second side wall arranged opposite to each other; A top wall connected to one end of the annular side wall; a first bottom wall connected to the other end of the annular side wall; Wherein, the top wall has a first through hole, the first bottom wall has a second through hole; the first through hole and the second through hole at least partially overlap; the first side wall has an air blowing port; and the second side wall has an air suction port.

2. The wind knife box according to claim 1, characterized in that: The first side wall and the second side wall are arranged opposite to each other along a first direction; the top wall and the first bottom wall are arranged opposite to each other along a second direction; the blowing port extends along a third direction; the length of the blowing port along the third direction is respectively greater than the maximum width of the first through hole along the third direction and the maximum width of the second through hole along the third direction; the first direction, the second direction and the third direction intersect with each other.

3. The wind knife box according to claim 2, characterized in that: The length of the blowing port along the third direction is greater than 5 times the width of the blowing port along the second direction.

4. The wind knife box according to claim 2 or 3, characterized in that: There are multiple air blowing ports, and the multiple air blowing ports are arranged at intervals along the second direction.

5. The wind knife box according to claim 4, characterized in that: The number of the blowing ports is two, and the two blowing ports are respectively arranged on opposite sides of the suction port along the second direction.

6. The wind knife box according to claim 5, characterized in that: The width of the blowing port close to the first bottom wall is greater than the width of the blowing port close to the top wall.

7. The wind knife box according to any one of claims 1 to 3, characterized in that: The inner wall surface of the second side wall has a recessed portion, and the air inlet is located at the bottom of the recessed portion.

8. The wind knife box according to any one of claims 1 to 3, characterized in that: The wind knife box also includes: The joint is fixed to the outer side surface of the second side wall and is communicated with the air intake port.

9. A wind knife assembly, characterized in that: include: The wind knife box according to any one of claims 1 to 8; The wind knife seat is arranged on the outer side surface of the first side wall of the wind knife box; wherein the air guide groove of the wind knife seat covers and is connected to the air outlet.

10. The air knife assembly according to claim 9, characterized in that: The wind knife seat comprises: The wind knife seat body has a first surface; the first surface has the air guide groove; the groove wall of the air guide groove has an air inlet.

11. The air knife assembly according to claim 10, characterized in that: The plurality of air inlets are arranged at intervals on the second bottom wall of the air guide groove.

12. The air knife assembly according to claim 11, characterized in that: The first surface also has an edge avoidance groove spaced apart from the air guide groove; the common side wall of the edge avoidance groove and the air guide groove has an insertion opening; The wind knife seat also includes a cover plate, which is inserted into the air guide groove from the edge avoidance groove and the insertion port, and is spaced apart from a side wall of the air guide groove away from the edge avoidance groove.

13. The air knife assembly according to claim 12, characterized in that: The insertion opening is located at the bottom of a common side wall of the edge avoidance groove and the air guide groove, and the third bottom wall of the edge avoidance groove is coplanar with the second bottom wall of the air guide groove.

14. The air knife assembly according to claim 13, characterized in that: The third bottom wall of the edge avoidance groove has a plurality of first mounting holes, and the plurality of first mounting holes are arranged at intervals along the extension direction of the edge avoidance groove; The cover plate has a plurality of second mounting holes at one end away from the air guide groove, and the plurality of second mounting holes are arranged in one-to-one correspondence with the plurality of first mounting holes; along the direction in which the cover plate is inserted from the insertion port, the length of the second mounting holes is different from the length of the first mounting holes.

15. A welding device, characterized in that: include: Laser components; Welding fixtures; A dust removal cover is spaced apart from the laser assembly; The air knife assembly according to any one of claims 9 to 14, arranged between the dust cover and the laser assembly; An air blowing device, connected to the air inlet of the air knife seat; The air extraction device is respectively connected with the air suction ports of the dust removal hood and the wind knife box.

16. A battery production system, characterized in that: include: Battery cell assembly device; The welding device according to claim 15.

Images