Laser welding dust removal device, laser welding equipment and battery production system

Abstract

The invention relates to a laser welding dust removal device, laser welding equipment and a battery production system. The dust removal device for laser welding comprises a dust removal cover and a spraying device, and the dust removal cover is provided with a laser emission port and used for collecting welding slag entering from the laser emission port. The spraying device is arranged in the dust removal cover and used for spraying cooling liquid into the inner space of the dust removal cover so as to cool splashed welding slag. By arranging the dust removal cover and forming the laser emission port in the dust removal cover, laser for welding is emitted from the laser emission port for welding, high-temperature welding slag generated by laser welding also enters the dust removal cover through the laser emission port, the effect of collecting high-temperature welding is achieved, and falling of the high-temperature welding slag on a welded part is preliminarily reduced. A spraying device is further arranged in the dust removal cover, cooling liquid is sprayed into the inner space of the dust removal cover, the cooling liquid is gasified after encountering high-temperature welding slag, and therefore the temperature of the welding slag is rapidly reduced, and the welding slag in the low-temperature state is difficult to adhere to a welding part or the inner wall of the dust removal cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery welding equipment, in particular to a laser welding dust removal device, a laser welding equipment and a battery production system. BACKGROUND

[0002] In the process of battery production, laser welding process is used in multiple processes, such as the connection of adapter plate and top cover, the connection of top cover and shell, and the connection of sealing nail, etc. In the process of laser welding, high-temperature welding slag is inevitably generated, and if the high-temperature welding slag falls on the surface of the welding piece, it will form strong adhesion with the welding piece after cooling. The traditional laser welding dust removal generally uses negative pressure air extraction for dust removal, which is difficult to remove the welding slag adhered to the surface of the welding piece. SUMMARY

[0003] In view of the above problems, the present application provides a laser welding dust removal device, a laser welding equipment and a battery production system, which can alleviate the problem of adhesion of high-temperature welding slag on the surface of the welding piece.

[0004] In a first aspect, the present application provides a laser welding dust removal device, which comprises:

[0005] A dust cover is provided with a laser outlet, and the dust cover is used to collect the welding slag entering from the laser outlet;

[0006] A spraying device is arranged in the dust cover, and the spraying device is used to spray cooling liquid into the internal space of the dust cover to cool the splashed welding slag.

[0007] The laser welding dust removal device provided by the embodiments of the present application collects the high-temperature welding slag generated by laser welding through the laser outlet of the dust cover, thereby preliminarily reducing the falling of high-temperature welding slag on the welding piece. Further, the spraying device is arranged in the dust cover to spray cooling liquid into the internal space of the dust cover, and the cooling liquid is vaporized after meeting the high-temperature welding slag, thereby rapidly reducing the temperature of the welding slag, so that the welding slag in a low-temperature state is difficult to adhere to the welding piece or the inner wall of the dust cover.

[0008] In other embodiments, the spraying device is arranged above the laser outlet and is provided with a plurality of spraying ports opposite the laser outlet.

[0009] The laser welding dust removal device provided by the embodiments of the present application forms a containing space for welding slag between the laser outlet and the spraying device by arranging the spraying device at a distance above the laser outlet. By arranging a plurality of spraying ports opposite the laser outlet on the spraying device, the high-temperature welding slag splashed into the above-mentioned containing space is uniformly sprayed with cooling liquid, so as to achieve good cooling effect.

[0010] In some other embodiments, the laser generating device is arranged on the side of the spraying device away from the laser outlet, and the spraying device is further provided with a light passing hole, and the laser generated by the laser generating device is emitted to the laser outlet through the light passing hole.

[0011] The laser welding dust removal device provided by the embodiments of the present application can avoid the cooling liquid to form a good protection effect on the laser generating device, and also facilitate forming a larger accommodation space between the spraying device and the laser outlet.

[0012] In some other embodiments, the light passing hole is arranged at the center position of the spraying device, and the plurality of spraying ports are arranged at intervals around the light passing hole.

[0013] The laser welding dust removal device provided by the embodiments of the present application is arranged as above, which is more conducive to avoiding the cooling liquid sprayed by the spraying port from the laser beam, and is more conducive to achieving a better laser welding effect.

[0014] In some other embodiments, the laser welding dust removal device further comprises:

[0015] The air extraction device is connected to the inside of the dust removal cover in an air path, and is used for negative pressure air extraction of the dust removal cover.

[0016] The laser welding dust removal device provided by the embodiments of the present application provides a negative pressure suction force on the welding slag at the laser outlet through the air extraction device, so that the welding slag quickly enters the dust removal cover, and the welding slag splashed in the dust removal cover can be further sucked and discharged.

[0017] In some other embodiments, the air extraction device comprises:

[0018] The dust removal pipe is connected to the dust removal cover at one end, and the air extraction port of the dust removal pipe on the dust removal cover is located between the laser outlet and the spraying device.

[0019] The vacuum generator is connected to the other end of the dust removal pipe, and is used for forming a negative pressure in the dust removal pipe.

[0020] The laser welding dust removal device provided by the embodiments of the present application communicates the vacuum generator and the dust removal cover through the dust removal pipe, so as to form a negative pressure in the dust removal cover. The welding slag splashed in the dust removal cover will enter the dust removal pipe under the negative pressure suction force.

[0021] In some other embodiments, the dust removal pipe and the dust removal cover are detachably connected.

[0022] When the dust removal pipe cannot be normally used due to accumulation of welding slag or other reasons, the dust removal pipe can be detached for maintenance.

[0023] In some other embodiments, the laser welding dust removal device further comprises:

[0024] An eddy current device is arranged in the dust cover and located between the air extraction device and the laser outlet; the eddy current device is capable of forming an alternating magnetic field, and the welding slag splashed from the laser outlet passes through the alternating magnetic field to form an eddy current.

[0025] The laser welding dust removal device provided by the embodiments of the present application is arranged as above, the eddy current formed by the welding slag generates a new magnetic field, the direction of the new magnetic field is opposite to that of the alternating magnetic field formed by the eddy current device, a thrust force is formed on the splashed welding slag, and the welding slag is accelerated to fly away.

[0026] In some other embodiments, the distance between the eddy current device and the laser outlet is smaller than the distance between the eddy current device and the air extraction port of the air extraction device on the dust cover.

[0027] The laser welding dust removal device provided by the embodiments of the present application is arranged as above, the eddy current formed by the welding slag generates a new magnetic field, the direction of the new magnetic field is opposite to that of the alternating magnetic field formed by the eddy current device, a thrust force is formed on the splashed welding slag, and the welding slag is accelerated to fly away.

[0028] In some other embodiments, the laser outlet and the eddy current device are arranged on the bottom wall of the dust cover, and the alternating magnetic field covers the laser outlet.

[0029] The laser welding dust removal device provided by the embodiments of the present application is arranged as above, the eddy current formed by the welding slag generates a new magnetic field, the direction of the new magnetic field is opposite to that of the alternating magnetic field formed by the eddy current device, a thrust force is formed on the splashed welding slag, and the welding slag is accelerated to fly away.

[0030] In some other embodiments, the eddy current device comprises an alternating current coil, and the alternating current coil is arranged on the inner wall surface of the dust cover.

[0031] The laser welding dust removal device provided by the embodiments of the present application is arranged as above, the eddy current formed by the welding slag generates a new magnetic field, the direction of the new magnetic field is opposite to that of the alternating magnetic field formed by the eddy current device, a thrust force is formed on the splashed welding slag, and the welding slag is accelerated to fly away.

[0032] In some other embodiments, the dust cover comprises:

[0033] A cover main body, one end of the cover main body is provided with an open end, and the other end is provided with a spraying device;

[0034] The protective cover is detachable and arranged on the opening, and the protective cover is provided with a laser outlet.

[0035] The laser welding dust removal device provided by the embodiments of the present application is arranged at the lower end of the cover main body, and the welding slag will have a falling trend under the influence of gravity, and more welding slag can be accumulated on the protective cover relative to the cover main body. Therefore, by arranging the protective cover to be detachable, the protective cover can be separately detached for cleaning or replacement, which is beneficial to reducing the cleaning or replacement cost.

[0036] In a second aspect, the present application further provides a laser welding device comprising the laser welding dust removal device according to any of the above embodiments.

[0037] In a third aspect, the present application provides a battery production system comprising the laser welding device according to any of the above embodiments.

[0038] The above description is only a summary of the technical solutions of the present application, in order to enable the technical means of the present application to be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the various drawings indicate the same or similar elements. In the drawings:

[0040] Figure 1 Structure diagram of the laser welding dust removal device of some embodiments of the present application;

[0041] Figure 2 Structure diagram of the spraying device of some embodiments of the present application;

[0042] Figure 3 Structure diagram of the eddy current device of some embodiments of the present application.

[0043] The reference numerals in the detailed description are as follows:

[0044] 100, battery;

[0045] 1, dust removal cover; 11, cover main body; 12, protective cover; 121, laser outlet;

[0046] 2, spraying device; 21, spraying port; 22, light passing hole;

[0047] 3, laser generating device;

[0048] 4. Dust removal pipe;

[0049] 5. Eddy current device. DETAILED DESCRIPTION

[0050] The embodiments of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "having," "including," and "containing" and any variations thereof in the present specification are intended to cover a non-exclusive inclusion.

[0052] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0053] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0054] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0055] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0056] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0057] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0058] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0059] In the production process of the battery, laser welding process is used in multiple processes, for example, the connection of the adapter plate and the top cover, the connection of the top cover and the shell, and the connection of the sealing nail. In the process of laser welding, high-temperature welding slag will inevitably be produced. If the high-temperature welding slag falls on the surface of the welded part, it will form a strong adhesive force with the welded part after cooling.

[0060] The inventors of the present application have noticed that the conventional laser welding dust removal is generally carried out by negative pressure air exhaust. The generated high-temperature welding slag is covered by a dust cover at the welding seam to prevent it from splashing everywhere, and then the dust cover is vacuumized to remove the high-temperature welding slag in the dust cover by negative pressure principle. However, this method can only suck and remove the floating welding slag, and it is still difficult to remove the welding slag which has been bonded to the surface of the welded part or the inner wall of the dust cover under high temperature.

[0061] Based on the above considerations, in order to solve the problem that the welding slag on the surface of the welded part is difficult to remove, the inventor designs a laser welding dust removal device through in-depth research. The laser welding dust removal device comprises a dust removal cover and a spraying device. The dust removal cover is provided with a laser outlet. The laser used for welding is emitted from the laser outlet for welding. The high-temperature welding slag generated by laser welding also enters the dust removal cover through the laser outlet, so as to collect the high-temperature welding and preliminarily reduce the falling of the high-temperature welding slag on the welded part. The spraying device is arranged in the dust removal cover and sprays cooling liquid into the internal space of the dust removal cover. The cooling liquid is gasified after meeting the high-temperature welding slag, so as to quickly reduce the temperature of the welding slag and make the welding slag in a low-temperature state difficult to adhere to the welded part or the inner wall of the dust removal cover.

[0062] The structure of the laser welding dust removal device according to some embodiments of the present application will be described in detail below with reference to the drawings.

[0063] Please refer to Figure 1 , Figure 1 The structure of the laser welding dust removal device according to some embodiments of the present application is shown in the accompanying drawings. The laser welding dust removal device according to the embodiments of the present application comprises a dust removal cover 1 and a spraying device 2. The dust removal cover 1 is provided with a laser outlet 121. The dust removal cover 1 is used to collect the welding slag entering from the laser outlet 121. The spraying device 2 is arranged in the dust removal cover 1 and is used to spray cooling liquid into the internal space of the dust removal cover 1 to cool the splashed welding slag.

[0064] The laser welding dust removal device according to the embodiments of the present application is provided. The dust removal cover 1 is provided with the laser outlet 121. The laser used for welding is emitted from the laser outlet 121 for welding. The high-temperature welding slag generated by laser welding also enters the dust removal cover 1 through the laser outlet 121, so as to collect the high-temperature welding and preliminarily reduce the falling of the high-temperature welding slag on the welded part. The spraying device 2 is arranged in the dust removal cover 1 and sprays cooling liquid into the internal space of the dust removal cover 1. The cooling liquid is gasified after meeting the high-temperature welding slag, so as to quickly reduce the temperature of the welding slag and make the welding slag in a low-temperature state difficult to adhere to the welded part or the inner wall of the dust removal cover 1.

[0065] Specifically, the welded part can be the battery 100 shown in Figure 1 . When working, the laser outlet 121 is aligned with the welding starting point on the battery 100. The dust removal cover 1 is moved until a complete welding seam is welded.

[0066] It can be understood that the laser welding dust removal device according to the embodiments of the present application is not limited to the battery 100 and is also applicable to other types of welded parts.

[0067] Optionally, the aperture of the laser outlet 121 is equal to or slightly larger than the outer diameter of the laser beam, so that the laser beam can smoothly pass through the laser outlet 121; at the same time, the aperture of the laser outlet 121 is as small as possible under the premise of smooth passing of the laser beam, so as to reduce the falling of the welding slag on the welding piece, and more welding slag enters the inside of the dust cover 1.

[0068] In some embodiments, the spraying device 2 is arranged above the laser outlet 121 and is provided with a plurality of spraying openings 21 opposite the laser outlet 121. By arranging the spraying device 2 at a distance above the laser outlet 121, a containing space for the welding slag is formed between the laser outlet 121 and the spraying device 2. By arranging a plurality of spraying openings 21 opposite the laser outlet 121 on the spraying device 2, the high-temperature welding slag splashed into the above-mentioned containing space is uniformly sprayed with cooling liquid, so as to achieve a good cooling effect.

[0069] Specifically, the dust cover 1 is arranged in a cylindrical structure, and the axis extends upward and downward. The laser outlet 121 is arranged on the bottom wall of the dust cover 1, and the spraying device 2 is arranged at the upper end of the dust cover 1.

[0070] Optionally, the laser outlet 121 is arranged at the center of the bottom wall of the dust cover 1, and of course, it can also be arranged at a position away from the center of the bottom wall, which is not limited herein. The spraying path of the spraying opening 21 can avoid the laser outlet 121, so as to reduce the dripping of the cooling liquid on the welding seam, thereby weakening the influence on the welding effect.

[0071] Please refer to Figure 1 and Figure 2 , Figure 2 The structure schematic diagram of the spraying device 2 of some embodiments of the present application is shown. In some embodiments, the laser generating device 3 is arranged on the side of the spraying device 2 away from the laser outlet 121, and the light passing hole 22 is further arranged on the spraying device 2, and the laser emitted by the laser generating device 3 is emitted to the laser outlet 121 through the light passing hole 22. By arranging the laser generating device 3 on the side of the spraying device 2 away from the laser outlet 121, the cooling liquid can be avoided, so as to form a good protection effect for the laser generating device 3, and it is also beneficial to form a larger containing space between the spraying device 2 and the laser outlet 121.

[0072] In some embodiments, the light passing hole 22 is arranged at the center position of the spraying device 2, and a plurality of spraying openings 21 are arranged at intervals around the light passing hole 22. In this way, the cooling liquid sprayed by the spraying opening 21 is more beneficial to avoid the laser beam, and a better laser welding effect can be achieved.

[0073] Specifically, the spraying device 2 is arranged in a disc type structure coaxially with the dust hood 1. The side vertical surface of the spraying device 2 is attached to the inner wall surface of the dust hood 1, which is more conducive to the firm installation of the spraying device 2 on the dust hood 1.

[0074] Optionally, the spraying port 21, the light passing hole 22 and the laser outlet 121 are all arranged in a circular shape, which is more convenient to process and is more conducive to the respective functions.

[0075] Optionally, the spraying port 21 is provided with an atomizing nozzle, which can spray atomized small droplets, which are more uniformly dispersed and are conducive to achieving better cooling effect.

[0076] Please continue to refer to Figure 1 In some embodiments, the laser welding dust removal device further comprises an air extraction device, which is connected to the inside of the dust hood 1 and is used to extract air from the dust hood 1 under negative pressure to provide negative pressure suction force to the welding slag at the laser outlet 121, so that the welding slag quickly enters the dust hood 1 and can further suck and discharge the splashed welding slag in the dust hood 1.

[0077] In some embodiments, the air extraction device comprises a dust removal pipe 4 and a vacuum generator (not shown in the figure), one end of the dust removal pipe 4 is connected to the dust hood 1, and the air extraction port of the dust removal pipe 4 on the dust hood 1 is located between the laser outlet 121 and the spraying device 2. The vacuum generator is connected to the other end of the dust removal pipe 4 to form negative pressure in the dust removal pipe 4. By connecting the vacuum generator and the dust hood 1 through the dust removal pipe 4, negative pressure is formed in the dust hood 1. The splashed welding slag in the dust hood 1 will enter the dust removal pipe 4 under the negative pressure suction force.

[0078] In some embodiments, the dust removal pipe 4 is detachably connected to the dust hood 1. When the dust removal pipe 4 cannot be normally used due to accumulation of welding slag or other reasons, the dust removal pipe 4 can be detached for maintenance.

[0079] Please refer to Figure 1 and Figure 3 , Figure 3 The structure schematic diagram of the eddy current device 5 of some embodiments of the present application is shown. In some embodiments, the laser welding dust removal device further comprises an eddy current device 5, which is arranged in the dust hood 1 and is located between the air extraction device and the laser outlet 121. The eddy current device 5 can form an alternating magnetic field, and the splashed welding slag from the laser outlet 121 passes through the alternating magnetic field to form an eddy current. In this way, the eddy current formed by the welding slag will generate a new magnetic field, which is opposite to the direction of the alternating magnetic field formed by the eddy current device 5, and will form a thrust force on the splashed welding slag, thereby accelerating the splashed welding slag to fly away.

[0080] Specifically, the eddy current device 5 comprises an alternating current coil, and when alternating current is passed through the alternating current coil, the above-mentioned alternating magnetic field will be generated.

[0081] In some embodiments, the alternating current coil is arranged on the inner wall surface of the dust cover 1 to increase the coverage of the alternating magnetic field and reduce the welding slag entering between the eddy current device 5 and the inner wall of the dust cover 1.

[0082] In some embodiments, the distance between the eddy current device 5 and the laser outlet 121 is less than the distance between the eddy current device 5 and the gas suction port of the gas suction device on the dust cover 1. That is, the eddy current device 5 is arranged close to the laser outlet 121, and the splashed welding slag has a tendency to fall downward under the action of gravity. By arranging the eddy current device 5 at a lower position, the force acting on the welding slag flying out of the laser outlet 121 can be applied earlier, and the welding slag flying out can be accelerated, which is more conducive to reducing the welding slag falling rapidly due to gravity.

[0083] In some embodiments, the laser outlet 121 and the eddy current device 5 are both arranged on the bottom wall of the dust cover 1, and the alternating magnetic field covers the laser outlet 121. In this way, the eddy current device 5 will exert a more uniform and greater force on the welding slag flying out of the laser outlet 121, thereby achieving a better dust removal effect of the laser welding dust removal device.

[0084] Please refer back to Figure 1 In some embodiments, the dust cover 1 includes a cover body 11 and a protective cover 12. One end of the cover body 11 is provided with an open end, and the other end is provided with a spraying device 2. The protective cover 12 is detachably arranged on the open end, and the laser outlet 121 is arranged on the protective cover 12. Since the protective cover 12 is arranged at the lower end of the cover body 11, the welding slag will have a tendency to fall under the action of gravity, and more welding slag may accumulate on the protective cover 12 relative to the cover body 11. Therefore, by arranging the protective cover 12 to be detachable, the protective cover 12 can be separately detached for cleaning or replacement, which is conducive to reducing the cleaning or replacement cost.

[0085] Alternatively, the protective cover 12 and the cover body 11 can be threadedly connected or connected through a clamping mode. Here, the specific connection mode of the protective cover 12 and the cover body 11 is not limited, as long as the connection is firm and convenient to detach.

[0086] In the embodiments of the present application, different types of cooling liquids can be used according to the different temperatures of the welding slag to achieve better cooling effect.

[0087] Specifically, when the temperature of the welding slag is relatively low, the temperature is below 200°C, the cooling liquid can be deionized water.

[0088] When the temperature of the welding slag is relatively high, the temperature is between 200°C and 600°C, the cooling liquid can be ethylene glycol solution or other phase change solution, such as fatty acid solution, and the solution concentration is in the range of 10% to 60%.

[0089] When the temperature of the welding slag is higher, reaching above 600℃, the coolant can be a nanofluid, such as an aqueous solution of Al2O3 or TiO2, requiring the material particle size to be ≤500nm and the solution concentration to be in the range of 0.1%~5%.

[0090] It should be noted that the above are just examples of several types of coolant and are not intended to limit the types of coolant.

[0091] The laser welding dust removal device provided in this application includes a dust removal hood 1, a spray device 2, a dust removal pipe 4, and an eddy current device 5. The dust removal hood 1 has a laser exit port 121 and is used to collect welding slag entering from the laser exit port 121. One end of the dust removal pipe 4 is connected to the dust removal hood 1, and the exhaust port of the dust removal pipe 4 on the dust removal hood 1 is located between the laser exit port 121 and the spray device 2. A vacuum generator is connected to the other end of the dust removal pipe 4 to create a negative pressure inside the dust removal pipe 4, thereby removing the welding slag from the dust removal hood 1 and accelerating the movement of the welding slag at the laser exit port 121 into the dust removal hood 1. The spray device 2 is located inside the dust removal hood 1 and is used to spray coolant into the internal space of the dust removal hood 1. The coolant vaporizes upon encountering the high-temperature welding slag, thereby rapidly reducing the temperature of the welding slag and making it difficult for the low-temperature welding slag to adhere to the welded parts or the inner wall of the dust removal hood 1. An eddy current device 5 is installed between the exhaust device and the laser outlet 121. The eddy current device 5 can generate an alternating magnetic field. The welding slag splashed from the laser outlet 121 passes through the alternating magnetic field to generate eddy currents. In this way, the eddy currents generated by the welding slag will produce a new magnetic field. This new magnetic field is opposite in direction to the alternating magnetic field generated by the eddy current device 5. It will exert a thrust on the welding slag that splashes through, thereby accelerating the welding slag to fly away. As a result, more welding slag will be sucked out by the dust removal pipe 4, which will alleviate the problem of high-temperature welding slag adhering to the surface of the welded parts.

[0092] This application also provides a laser welding device, which includes the laser welding dust removal device as described in any of the above embodiments.

[0093] This application also provides a battery production system, which includes the laser welding equipment as described in any of the above embodiments.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A laser welding dust removal device, characterized in that, include: A dust collector (1) is provided with a laser outlet (121) and the dust collector (1) is used to collect welding slag entering from the laser outlet (121); A spray device (2) is installed inside the dust removal hood (1); the spray device (2) is used to spray coolant into the interior space of the dust removal hood (1) to cool down the splashed welding slag.

2. The laser welding dust removal device according to claim 1, characterized in that, The spray device (2) is spaced above the laser outlet (121) and has multiple spray nozzles (21) opposite to the laser outlet (121).

3. The laser welding dust removal device according to claim 2, characterized in that, The spray device (2) has a laser generator (3) on the side away from the laser outlet (121). The spray device (2) is also provided with a light-passing hole (22). The laser emitted by the laser generator (3) is emitted to the laser outlet (121) through the light-passing hole (22).

4. The laser welding dust removal device according to claim 3, characterized in that, The light-passing hole (22) is located at the center of the spray device (2), and the plurality of spray nozzles (21) are arranged at intervals around the light-passing hole (22).

5. The laser welding dust removal device according to any one of claims 1 to 4, characterized in that, The laser welding dust removal device also includes: An air extraction device is connected to the inside of the dust removal hood (1) and is used to extract air from the dust removal hood (1) under negative pressure.

6. The laser welding dust removal device according to claim 5, characterized in that, The air extraction device includes: Dust removal pipe (4), one end of which is connected to the dust removal hood (1), and the air extraction port of the dust removal pipe (4) on the dust removal hood (1) is located between the laser emission port (121) and the spray device (2); A vacuum generator is connected to the other end of the dust removal pipe (4) to create a negative pressure inside the dust removal pipe (4).

7. The laser welding dust removal device according to claim 6, characterized in that, The dust removal pipe (4) is detachably connected to the dust removal cover (1).

8. The laser welding dust removal device according to claim 5, characterized in that, The laser welding dust removal device also includes: Eddy current device (5) is installed inside the dust removal hood (1) and located between the air extraction device and the laser outlet (121); the eddy current device (5) can generate an alternating magnetic field, and the welding slag splashed from the laser outlet (121) passes through the alternating magnetic field to generate eddy current.

9. The laser welding dust removal device according to claim 8, characterized in that, The distance between the eddy current device (5) and the laser emission outlet (121) is less than the distance between the eddy current device (5) and the air extraction device on the dust removal hood (1).

10. The laser welding dust removal device according to claim 9, characterized in that, The laser emission outlet (121) and the eddy current device (5) are both located on the bottom wall of the dust cover (1), and the alternating magnetic field covers the laser emission outlet (121).

11. The laser welding dust removal device according to claim 8, characterized in that, The eddy current device (5) includes an AC coil, which is attached to the inner wall of the dust collector (1).

12. The laser welding dust removal device according to any one of claims 1 to 4, characterized in that, The dust collector hood (1) includes: The main body of the cover (11) has an opening at one end and the spray device (2) at the other end. A protective cover (12) is detachably provided on the opening, and the protective cover (12) is provided with the laser emission outlet (121).

13. A laser welding device, characterized in that, Includes the laser welding dust removal device as described in any one of claims 1 to 12.

14. A battery production system, characterized in that, Including the laser welding equipment as described in claim 13.

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