Dust removal apparatus and battery production device

Abstract

The present application pertains to the technical field of batteries, and provides a dust removal apparatus and a battery production device. The dust removal apparatus comprises a base and a dust removal cover. The base is provided with a first sub-cavity penetrating through the base. The dust removal cover is configured to be assembled on the base. The dust removal cover is provided with a second sub-cavity, the first sub-cavity is in communication with the second sub-cavity, the end of the first sub-cavity away from the dust removal cover is a dust removal opening, and the dust removal opening is provided to be in contact with a surface of a target object to undergo laser treatment. The surface of the dust removal cover close to the base is provided with a protruding part, the second sub-cavity penetrates through an end surface of the protruding part, at least a portion of the protruding part is located in the first sub-cavity, and a gap is formed between the protruding part and a sidewall of the first sub-cavity to form an annular gas channel. A gas supply opening of the dust removal apparatus is in communication with the annular gas channel, such that gas introduced from the gas supply opening can blow toward the dust removal opening through the annular gas channel. According to the embodiments of the present application, the dust removal apparatus can improve the dust removal effect during laser treatment.

Description

Dust removal device and battery production equipment

[0001] Cross-reference to related applications

[0002] This application is based on Chinese Patent Application No. 202410472823.8, filed on April 18, 2024, entitled “Dust removal device and battery production equipment”, which is incorporated by reference in its entirety into this application. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery production, and in particular to a dust removal device and a battery production equipment. BACKGROUND

[0004] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0005] With the development of industrial technology, laser technology is increasingly applied in the process of battery manufacturing, such as laser welding, laser cleaning, laser cutting, etc. However, dust may be generated during the laser processing process, which may affect the quality of the battery. Therefore, it is necessary to effectively remove the dust generated during the laser processing process to avoid affecting the quality of the battery.

[0006] SUMMARY

[0007] The present application aims to at least solve one of the technical problems existing in the background art. To this end, one object of the present application is to provide a dust removal device and a battery production equipment to solve the problem of dust removal for dust generated during the laser processing of battery manufacturing.

[0008] Embodiments of the first aspect of the present application provide a dust removal device for dust removal when a target object is subjected to laser processing, comprising a base and a dust removal cover. The base has a first sub-cavity passing through the base. The dust removal cover is configured to be assembled on the base, and the dust removal cover has a second sub-cavity, the first sub-cavity and the second sub-cavity are in communication, the end of the first sub-cavity away from the dust removal cover is a dust removal port, the dust removal port is used to be in contact with the surface of the target object to be subjected to laser processing, the surface of the dust removal cover close to the base has a protruding part, the second sub-cavity passes through the end face of the protruding part, at least a part of the protruding part is located in the first sub-cavity, and the protruding part and the side wall of the first sub-cavity have a gap to form an annular air channel, the air supply port of the dust removal device is in communication with the annular air channel, so that the gas introduced by the air supply port can be blown to the dust removal port through the annular air channel.

[0009] In the technical scheme of the embodiment of the application, the convex part is inserted into the cavity of the base, so that an annular air channel is formed between the convex part and the cavity wall of the base, the cross section of the air channel perpendicular to the axis of the cavity is annular, the gas introduced by the gas inlet passes through the annular air channel to the dust removal port at the bottom of the cavity of the base for omnidirectional gas supply, so that the dust removal effect is improved.

[0010] In some embodiments, the dust removal cover is provided with a plurality of dust extraction ports, the plurality of dust extraction ports are distributed around the axis of the second sub-cavity, and the plurality of dust extraction ports are all in communication with the second sub-cavity, and the dust blown up by the dust removal port is extracted through the dust extraction port. Thus, the omnidirectional dust extraction is realized by arranging a plurality of dust extraction ports around the dust removal cover, and the dust removal effect is further improved.

[0011] In some embodiments, the base and the dust removal cover are matched at the contact interface to form an annular buffer cavity, the buffer cavity surrounds the annular air channel and is in communication with the annular air channel, and the gas inlet is in communication with the buffer cavity. Thus, the gas inlet enters the annular air channel through the buffer cavity, the uniformity of the gas flow in the annular air channel is further improved, the omnidirectional gas supply to the dust removal port is realized, and the dust removal effect is improved.

[0012] In some embodiments, the gas inlet is tangentially connected to the buffer cavity, so that the gas introduced by the gas inlet enters the buffer cavity along the tangential direction of the buffer cavity, so that the gas flow in the buffer cavity is spirally accelerated, and the dust removal effect of the gas flow on the dust of the dust removal port is improved.

[0013] In some embodiments, the dust removal device has a plurality of gas inlets, the gas inlets are distributed around the buffer cavity, and the directions of the gas flows of the gases introduced by the gas inlets into the buffer cavity are all counterclockwise or clockwise. Thus, by arranging a plurality of gas inlets around the buffer cavity and by the directions of the gas flows introduced by the plurality of gas inlets into the buffer cavity being consistent, the uniformity of the gas flow in the annular air channel is further improved, the omnidirectional gas supply to the dust removal port is realized, and the dust removal effect is improved.

[0014] In some embodiments, the side wall of the convex part of the dust removal cover has at least one opening to form a turbine feature, so as to prevent the formation of a tornado airflow in the cavity of the dust removal cover during the dust extraction process and to avoid the phenomenon of dust being sucked back into the dust removal port.

[0015] In some embodiments, the angle α between the length direction of the opening and the axis of the second sub-cavity of the dust removal cover satisfies 0°≤α≤90°, so as to form a turbine feature and avoid the phenomenon of back suction.

[0016] In some embodiments, the end face of the convex part of the dust removal cover is close to the dust removal port, so that the gas outlet of the annular air channel is close to the dust removal port, and the dust removal port can be better dusted.

[0017] In some embodiments, the distance d between the end surface of the protruding portion and the dust removal port along the extension direction of the axis of the second sub-cavity satisfies: 0 < d ≤ 10 mm, so that the gas outlet of the annular air channel is close to the dust removal port, and the dust removal port is better for dust removal.

[0018] In some embodiments, the end surface of the protruding portion is located in the first sub-cavity. In this way, by setting the end surface of the protruding portion of the bottom of the dust removal cover in the base cavity, the dust removal port can be attached to the laser processing surface of the target object, so that the dust blown by the dust removal port is removed from the dust removal port as much as possible, and the dust is blown to the outside of the dust removal device during the dust removal process to avoid secondary pollution.

[0019] In some embodiments, the inner diameter of the end of the first sub-cavity away from the dust removal port is greater than the inner diameter of the end close to the dust removal port, that is, the first sub-cavity is an upper large and lower small cavity, so that the gas flow in the annular air channel can be inclined to the dust removal port along the side wall of the first sub-cavity, and the dust at the dust removal port is blown upward as much as possible, which is beneficial to better dust removal.

[0020] In some embodiments, the first sub-cavity and the second sub-cavity are coaxially arranged, so as to facilitate the dust removal of the dust blown by the dust removal port at the bottom of the first sub-cavity through the second sub-cavity of the dust removal cover, and also can realize the laser processing of the target object at the dust removal port through the top end of the second sub-cavity, so as to improve the dust removal effect and prevent secondary pollution.

[0021] In some embodiments, the dust removal cover includes an upper cover and a middle cover. The upper cover is provided with a laser incident port and at least one dust removal port, the middle cover is located between the upper cover and the base, the protruding portion is located on the middle cover, and the second sub-cavity penetrates the middle cover. The laser incident port and the at least one dust removal port are in communication with the second sub-cavity. In this way, the dust removal cover is composed of the upper cover and the middle cover, which is convenient for forming the second sub-cavity with an upper large and lower small shape (that is, the inner diameter of the end of the second sub-cavity away from the upper cover is smaller than the inner diameter of the end close to the upper cover) on the middle cover, which is beneficial to improve the dust removal effect. By setting the upper cover independent of the middle cover, it is convenient to process the required laser incident port and dust removal port on the upper cover, and the manufacturing process is simplified.

[0022] In some embodiments, the surface of the base in contact with the dust removal cover is formed with an annular buffer cavity surrounding and in communication with the annular air channel, and the gas inlet is in communication with the buffer cavity. In this way, the gas inlet enters the annular air channel through the buffer cavity, further improving the uniformity of the gas flow in the annular air channel, realizing omnidirectional gas supply to the dust removal port, and improving the dust removal effect.

[0023] In some embodiments, the gas inlet is provided on the base, which is beneficial to supply gas to the annular air channel and shorten the gas path.

[0024] In some embodiments, the dust cover is a one-piece structure, and the sidewall of the second sub-cavity is provided with at least one dust extraction port to simplify the structure of the dust cover.

[0025] In some embodiments, the air supply port is arranged on the dust cover, and the surface of the dust cover in contact with the base is formed with an annular buffer cavity surrounding and communicating with the annular air channel, and the air supply port communicates with the buffer cavity. In this way, the air inlet enters the annular air channel through the annular buffer cavity, further improving the uniformity of the gas flow in the annular air channel, achieving omnidirectional air supply to the dust extraction port, improving the dust removal effect, and further simplifying the structure of the base.

[0026] Embodiments of the second aspect of the application provide a battery production device, comprising a laser device and the dust removal device in the above embodiments, the laser device is used for laser processing of the battery, and the dust removal device is used for dust removal of dust generated by the laser processing. The dust extraction port of the dust removal device is arranged in contact with the surface of the battery subjected to the laser processing.

[0027] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0028] In the drawings, like reference numerals refer to same or similar elements throughout the several views. The drawings are not necessarily to scale. It should be understood that these drawings only depict some embodiments in accordance with the disclosure and should not be considered limiting of the scope of the disclosure. In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the embodiments of the application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of the drawings.

[0029] Fig. 1 is a structural schematic view of a dust removal device according to some embodiments of the application;

[0030] Fig. 2 is a sectional view of Fig. 1;

[0031] Fig. 3 is a sectional view of the base in Fig. 1;

[0032] Fig. 4 is a structural schematic view of a middle cover of a dust cover according to some embodiments of the application;

[0033] Fig. 5 is a structural schematic view of a dust removal device according to some other embodiments of the application;

[0034] Fig. 6 is a structural schematic diagram of a dust removal device according to some embodiments of the present application;

[0035] Fig. 7 is a sectional view of Fig. 6;

[0036] Fig. 8 is a sectional view of the base in Fig. 6;

[0037] Fig. 9 is a structural schematic diagram of a dust removal cover according to some embodiments of the present application.

[0038] Legend: Base 1, dust removal cover 2, middle cover 22, upper cover 23, annular air duct 3; buffer cavity 1-1, first sub-cavity 1-2, air supply port 1-3, dust removal port 1-4, opening 2-2, second sub-cavity 2-3, laser incidence port 3-1, dust extraction port 3-2, axis X of the second sub-cavity; protrusion 2-1. DETAILED DESCRIPTION

[0039] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0040] 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 the present application belongs; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0041] 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 "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0042] 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 other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "and / or" is only to describe the relationship between 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.

[0044] 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).

[0045] In the description of the embodiments of the present application, 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 indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply 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 a limitation on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] At present, from the development of market situation, the application of power battery is more and more extensive. The power 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, as well as military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0048] In the related art, laser technology is widely used in the battery manufacturing process, for example, laser can be used for cutting, cleaning or welding of workpieces and other processing. Dust will be generated in the laser processing process, and dust accumulation and splashing will affect the laser processing, thereby affecting the battery performance, and dust may be left on the battery, which has a safety risk. How to effectively and timely clean the dust generated in the laser processing process has become a problem to be solved.

[0049] Based on the above considerations, an embodiment of the present application designs a dust removal device, which comprises a base and a dust removal cover. The base has a first sub-cavity penetrating the base. The dust removal cover is configured to be assembled on the base, and the dust removal cover has a second sub-cavity, the first sub-cavity and the second sub-cavity are in communication, the end of the first sub-cavity away from the dust removal cover is a dust removal port, and the dust removal port is used to be in contact with the surface of the target object to be laser processed. The second sub-cavity can penetrate the dust removal cover, and the end of the second sub-cavity away from the base is a laser incident port, and the laser is incident from the laser incident port to perform laser processing on the target object at the dust removal port.

[0050] The surface of the dust removal cover close to the base has a protruding part, the second sub-cavity penetrates the end face of the protruding part, at least a part of the protruding part is located in the first sub-cavity, and there is a gap between the protruding part and the side wall of the first sub-cavity to form an annular air channel. The air supply port of the dust removal device is in communication with the annular air channel, so that the gas introduced by the air supply port can be blown to the dust removal port through the annular air channel. Since the gas outlet of the annular air channel is connected to the dust removal port along the circumferential direction of the dust removal port, omnidirectional air supply to the dust removal port can be realized, there is no cleaning dead angle, the dust removal effect is improved, and the problem of airflow flow disorder in the dust removal cover caused by one-sided air supply to the dust removal port, which affects the dust removal effect, can be effectively alleviated.

[0051] The dust removal cover disclosed in the embodiments of the present application can be used in the production of batteries for electric devices such as vehicles, ships or aircraft, etc. The battery produced by the dust removal device disclosed in the present application can be used to form the power supply system of the electric device, which is beneficial to improve the performance and safety of the battery.

[0052] The embodiments of the present application provide an electric device using a battery as a power supply. The electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric automobile, a ship, a spacecraft, etc. The electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0053] It can be understood that the dust removal device disclosed in the embodiments of the present application is not limited to be applied to laser processing for producing batteries, and can be applied to any laser processing scene.

[0054] The embodiment of the present application provides a dust removal device for dust removal when a target object is subjected to laser processing. In combination with FIGS. 1-3, the dust removal device comprises a base 1 and a dust removal cover 2. The base 1 has a first sub-cavity 1-2 penetrating through the base 1. The dust removal cover 2 is configured to be assembled on the base 1. The dust removal cover 2 has a second sub-cavity 2-3. The first sub-cavity 1-2 and the second sub-cavity 2-3 are in communication. An end of the first sub-cavity 1-2 away from the dust removal cover 2 is a dust removal port 1-4. The dust removal port 1-4 is configured to be in contact with a surface of the target object to be subjected to laser processing. A surface of the dust removal cover 2 close to the base 1 has a protruding part 2-1. The second sub-cavity 2-3 penetrates an end surface of the protruding part 2-1. At least a part of the protruding part 2-1 is located in the first sub-cavity 1-2. A gap is formed between the protruding part 2-1 and a side wall of the first sub-cavity 1-2 to form an annular air channel 3. A gas inlet 1-3 of the dust removal device is in communication with the annular air channel 3. Therefore, the gas introduced through the gas inlet 1-3 can be blown to the dust removal port 1-4 through the annular air channel 3.

[0055] The target object may, for example but not limited to, be a battery. The battery can be subjected to laser processing such as laser cutting, laser welding, laser cleaning and the like.

[0056] In some embodiments, the second sub-cavity 2-3 can penetrate through the dust removal cover 2. An end of the second sub-cavity 2-3 away from the base 1 is a laser incidence port 3-1. Laser is emitted from the laser incidence port 3-1 to process the target object at the dust removal port 1-4.

[0057] In some embodiments, the dust removal device further comprises a dust extraction port 3-2 arranged on the dust removal cover 2. The dust extraction port 3-2 is in communication with the second sub-cavity 2-3. Therefore, the dust blown up from the dust removal port 1-4 can be extracted directionally to avoid secondary pollution.

[0058] The communication between the first sub-cavity 1-2 and the second sub-cavity 2-3 can mean that the first sub-cavity 1-2 and the second sub-cavity 2-3 are in communication along the axial direction of the first sub-cavity 1-2. It can be understood that the first sub-cavity 1-2 and the second sub-cavity 2-3 are in sealed communication. Therefore, the dust blown up from the dust removal port 1-4 can be extracted directionally from the dust extraction port 3-2 to avoid leakage of the dust from the communication between the first sub-cavity 1-2 and the second sub-cavity 2-3 to the outside. The sealed communication here can mean that the first sub-cavity 1-2 and the second sub-cavity 2-3 are in communication and a sealing member (such as sealing glue) is arranged at the communication between the first sub-cavity 1-2 and the second sub-cavity 2-3 to seal the communication to avoid air leakage at the communication between the first sub-cavity 1-2 and the second sub-cavity 2-3. In some embodiments, a sealing member can be arranged at the contact interface between the base 1 and the dust removal cover 2. Therefore, the first sub-cavity 1-2 penetrating through the base 1 and the second sub-cavity 2-3 of the dust removal cover 2 are in sealed communication.

[0059] In some embodiments, the first sub-cavity 1-2 and the second sub-cavity 2-3 can be coaxially arranged, so that the first sub-cavity 1-2 and the second sub-cavity 2-3 are in communication along the axial direction of the first sub-cavity 1-2. In the embodiment shown in FIG. 2, the axial line X of the first sub-cavity 1-2 coincides with that of the second sub-cavity 2-3.

[0060] The first sub-cavity 1-2 can be a cylinder with a uniform inner diameter in the extension direction, or can be a shape with a non-uniform inner diameter in the extension direction (e.g., a tapered cylinder). Similarly, the second sub-cavity 2-3 can be a cylinder with a uniform inner diameter in the extension direction, or can be a shape with a non-uniform inner diameter in the extension direction (e.g., a tapered cylinder). In the examples shown in FIGS. 2 and 3, both the first sub-cavity 1-2 and the second sub-cavity 2-3 are inverted tapered cylinders with a larger upper part and a smaller lower part. The first sub-cavity 1-2 being an inverted tapered cylinder with a larger upper part and a smaller lower part can facilitate the gas blown out of the annular air channel 3 to blow obliquely towards the dust removal port 1-4, so that the dust at the dust removal port 1-4 can be better blown up. The second sub-cavity 2-3 being an inverted tapered cylinder with a larger upper part and a smaller lower part can facilitate the gas to accelerate upward in the inverted tapered cylinder after blowing obliquely up the dust at the dust removal port 1-4, so that the dust blown up from the dust removal port 1-4 can be more easily lifted to the dust suction port 3-2 in the inverted tapered cylinder, so that the dust blown up from the dust removal port 1-4 can be better removed from the dust suction port 3-2. It should be noted that the "upper" and "lower" directions herein are the directions shown in FIGS. 2 and 3, and are only for the purpose of understanding and description, and do not have other limiting meanings.

[0061] The "contacting arrangement" of the dust removal port 1-4 and the surface of the target object to be processed by laser can mean that the dust removal port 1-4 is as close as possible to the surface of the target object to be processed by laser, for example, in the direction perpendicular to the surface of the target object to be processed by laser (e.g., the extension direction of the axial line X), the distance between the dust removal port 1-4 and the surface of the target object to be processed by laser is less than a preset value (e.g., 10 mm), so as to avoid dust splashing out from the gap between the dust removal port 1-4 and the surface of the target object to be processed by laser.

[0062] The shape of the protruding part 2-1 of the dust removal cover 2 close to the surface of the base 1 is not limited in the embodiments of the present application. In some embodiments, the protruding part 2-1 can be a boss, such as a circular boss (cross section is circular) or a polygonal boss (cross section is polygonal, such as quadrilateral, pentagonal, etc.), as long as there is a gap between the protruding part 2-1 and the inner wall of the first sub-cavity 1-2 of the base 1 so as to form an annular air channel.

[0063] The end surface of the protruding part 2-1 can mean the surface of the protruding part 2-1 away from the surface of the base 1.

[0064] The shape of the air passage being annular can mean that, in a direction perpendicular to the axis X of the first sub-cavity 1-2, there is a gap between the protruding portion 2-1 extending into the first sub-cavity 1-2 and the inner wall of the first sub-cavity 1-2. Since the gap is annular with the axis X of the first sub-cavity 1-2 as the center, the air passage formed by the gap between the protruding portion 2-1 and the inner wall of the first sub-cavity 1-2 is referred to as an annular air passage 3.

[0065] That is, the part of the annular air passage 3 close to the dust removal port 1-4 is an annular air outlet, and the annular air outlet is connected to the dust removal port 1-4 along the circumferential direction of the dust removal port 1-4 to achieve omnidirectional air supply to the dust removal port 1-4.

[0066] The end surface of the protruding portion 2-1 can be flush with the dust removal port 1-4, or can be located inside the dust removal port 1-4. In some embodiments, the distance between the air outlet of the annular air passage 3 and the dust removal port 1-4 along the axial direction of the first sub-cavity 1-2 is less than a set value (for example, 20 mm) so that the gas blown out of the air outlet of the annular air passage 3 can be blown to the dust removal port 1-4 as much as possible.

[0067] Therefore, by forming the protruding portion 2-1 at the bottom of the dust removal cover 2 and inserting it into the cavity of the base 1, an annular air passage is formed between the protruding portion 2-1 and the cavity wall of the bottom, that is, the cross section of the air passage perpendicular to the axis of the cavity is annular, and the gas passing through the annular air passage 3 is supplied omnidirectionally to the dust removal port 1-4 at the bottom of the cavity of the base 1 to perform dust removal, and there is no cleaning dead angle, thereby improving the dust removal effect.

[0068] According to some embodiments of the present application, as shown in FIG. 5, the dust removal cover 2 has a plurality of dust extraction ports 3-2, the plurality of dust extraction ports 3-2 are distributed around the axis X of the second sub-cavity 2-3, and the plurality of dust extraction ports 3-2 are all in communication with the second sub-cavity 2-3 to extract the dust blown up by the dust removal port 1-4.

[0069] The distance between the plurality of dust extraction ports 3-2 and the axis X of the second sub-cavity 2-3 can be the same and equally spaced along the circumferential direction centered on the axis X of the second sub-cavity 2-3, thereby achieving omnidirectional and uniform dust extraction.

[0070] The plurality of dust extraction ports 3-2 can be connected to the same negative pressure mechanism, or can be connected to different negative pressure mechanisms, and the dust is extracted through the second sub-cavity 2-3 by the negative pressure formed by the negative pressure mechanism.

[0071] Therefore, by providing the plurality of dust extraction ports 3-2 on the dust removal cover 2, omnidirectional dust extraction can be achieved, further improving the dust removal effect.

[0072] According to some embodiments of the present application, the base 1 and the dust cover 2 are matched at the contact interface to form a ring-shaped buffer cavity 1-1, which surrounds and communicates with the ring-shaped air channel 3, and the air inlet 1-3 communicates with the buffer cavity 1-1.

[0073] In some embodiments, referring to FIG. 3, a ring-shaped buffer cavity 1-1 can be formed on the surface of the base 1 that contacts the dust cover 2. The buffer cavity 1-1 can be formed by forming a ring-shaped groove structure around the first sub-cavity 1-2 on the surface of the base 1.

[0074] It can be understood that the ring-shaped buffer cavity 1-1 can also be formed on the bottom surface of the dust cover 2 that contacts the base 1.

[0075] By providing the ring-shaped buffer cavity 1-1, even if only one air inlet 1-3 is provided, it can achieve omnidirectional air supply along the circumference of the ring-shaped air channel 3, which is further conducive to improving the dust removal effect.

[0076] Therefore, the air inlet enters the ring-shaped air channel 3 through the buffer cavity 1-1, which further improves the uniformity of the gas flow in the ring-shaped air channel 3, achieves omnidirectional air supply to the dust removal port 1-4, and improves the dust removal effect.

[0077] According to some embodiments of the present application, the air inlet 1-3 communicates with the buffer cavity 1-1 tangentially.

[0078] That is, the flow direction of the gas flow at the air inlet 1-3 is tangential to the ring-shaped buffer cavity 1-1.

[0079] The gas entering the buffer cavity 1-1 through the air inlet 1-3 enters the buffer cavity 1-1 along the tangential direction of the ring-shaped buffer cavity 1-1, so as to achieve spiral pressurization and acceleration of the air flow in the buffer cavity 1-1, which is further conducive to improving the dust removal effect of the gas flow on the dust removal port 1-4.

[0080] According to some embodiments of the present application, the dust removal device has a plurality of air inlets 1-3, the air inlets 1-3 are distributed around the buffer cavity 1-1, and the direction of the air flow after the gas entering the buffer cavity 1-1 through the air inlets 1-3 is counterclockwise or clockwise.

[0081] In some embodiments, the plurality of gas supply ports 1-3 can be arranged on the dust cover 2 or the base 1. In one example, when the buffer cavity 1-1 is formed by an annular groove structure arranged on the surface of the base 1 in contact with the dust cover 2, the plurality of gas supply ports 1-3 can be arranged on the base 1 to facilitate the communication between the gas supply ports 1-3 and the buffer cavity 1-1. In another example, when the buffer cavity 1-1 is formed by an annular groove structure arranged on the bottom surface of the dust cover 2 in contact with the base 1, the plurality of gas supply ports 1-3 can be arranged on the dust cover 2 to facilitate the communication between the gas supply ports 1-3 and the buffer cavity 1-1.

[0082] The gas flow directions of the gas flowing into the plurality of gas supply ports 1-3 can be counterclockwise or clockwise, which means that the gas flowing into the plurality of gas supply ports 1-3 enters the annular buffer cavity 1-1 along the counterclockwise or clockwise direction of the annular buffer cavity 1-1, so that the gas flowing into the buffer cavity 1-1 through the gas supply ports 1-3 flows in the same direction, which is beneficial to form a stable and uniform gas flow in the buffer cavity 1-1.

[0083] Therefore, by arranging the plurality of gas supply ports 1-3 around the buffer cavity 1-1 and by making the gas flow directions consistent through the plurality of gas supply ports 1-3, the uniformity of the gas flow in the annular gas channel 3 is further improved, the omnidirectional gas supply to the dust removal port 1-4 is achieved, and the dust removal effect is improved.

[0084] According to some embodiments of the present application, the side wall of the protruding portion 2-1 of the dust cover 2 has at least one opening 2-2 to form a turbine feature.

[0085] In some embodiments, the side wall of the protruding portion 2-1 of the dust cover 2 has a plurality of openings 2-2, and the plurality of openings 2-2 are uniformly distributed in the circumferential direction of the side wall of the protruding portion 2-1 with the axis X of the second sub-cavity 2-3 as the center.

[0086] Therefore, by forming a turbine feature in the dust cover 2, the formation of a tornado airflow in the cavity of the dust cover 2 is prevented, and the phenomenon of dust being sucked back into the dust removal port 1-4 is avoided.

[0087] According to some embodiments of the present application, the angle a between the length direction of the opening 2-2 and the axis X of the second sub-cavity 2-3 of the dust cover 2 satisfies: 0 degrees (°) ≤ a ≤ 90 degrees (°).

[0088] As shown in the example of FIG. 4, the side wall of the protruding portion 2-1 of the dust cover 2 has a plurality of openings 2-2, and the angles between the length directions of the plurality of openings 2-2 and the axis X of the second sub-cavity 2-3 of the dust cover 2 can not be exactly the same, so as to better prevent the formation of a tornado airflow in the second sub-cavity 2-3.

[0089] Therefore, by forming the opening 2-2 of an arbitrary angle on the side wall of the protruding portion 2-1 of the dust cover 2 to form a turbine feature, the dust back-suction phenomenon can be avoided.

[0090] According to some embodiments of the present application, the end surface of the protruding portion 2-1 of the dust cover 2 is close to the dust outlet 1-4.

[0091] The end surface of the protruding portion 2-1 can be flush with the dust outlet 1-4, or can be located inside the dust outlet 1-4. Along the circumference of the second sub-cavity 2-3 of the dust cover 2, the length of the second annular air channel 3 is the depth of the end surface of the protruding portion 2-1 into the first sub-cavity 1-2 of the base 1, and the gas outlet of the second annular air channel 3 corresponds to the position of the end surface of the protruding portion 2-1.

[0092] In some embodiments, along the axial direction of the first sub-cavity 1-2, the distance between the end surface of the protruding portion 2-1 and the dust outlet 1-4 is less than a set value (for example, 20 mm), so that the gas blown out of the gas outlet of the annular air channel 3 can be blown to the dust outlet 1-4 as much as possible.

[0093] Therefore, the gas outlet of the annular air channel 3 is close to the dust outlet 1-4, which can better dust the dust outlet 1-4.

[0094] According to some embodiments of the present application, along the extension direction of the axial line X of the second sub-cavity 2-3, the distance d between the end surface of the protruding portion 2-1 and the dust outlet 1-4 satisfies: 0 < d ≤ 10 millimeters (mm).

[0095] That is, by limiting the distance between the end surface of the protruding portion 2-1 and the dust outlet 1-4, the gas outlet of the annular air channel 3 is as close as possible to the surface to be laser processed.

[0096] Therefore, by limiting the distance between the end surface of the protruding portion 2-1 and the dust outlet 1-4, the gas outlet of the annular air channel 3 is close to the dust outlet 1-4, which can better dust the dust outlet 1-4.

[0097] According to some embodiments of the present application, the end surface of the protruding portion 2-1 is located in the first sub-cavity 1-2.

[0098] In other words, the gas outlet of the annular air channel 3 is located in the first sub-cavity 1-2, and the dust removal airflow in the annular air channel 3 enters the second sub-cavity 2-3 from the end surface of the protruding portion 2-1 after flowing through the dust outlet 1-4, so that the dust blown up from the dust outlet 1-4 can be directed away through the dust cover 2, avoiding secondary pollution.

[0099] Therefore, by setting the end face of the protruding portion 2-1 at the bottom of the dust removal cover 2 in the cavity of the base 1, the dust removal port 1-4 can be attached to the laser processing surface of the target object, so that the dust blown by the dust removal port 1-4 is removed from the dust extraction port 3-2 as much as possible, avoiding secondary pollution caused by blowing dust outside the dust removal device during the dust removal process.

[0100] According to some embodiments of the present application, the inner diameter of the first sub-cavity 1-2 at the end far away from the dust removal port 1-4 is greater than the inner diameter at the end close to the dust removal port 1-4, that is, the first sub-cavity 1-2 is an upper large and lower small cavity.

[0101] That is, in addition to the annular flow, the gas flow flowing into the annular air channel 3 from the gas supply port 1-3 is affected by the shape of the first sub-cavity 1-2, and the gas flow will flow from top to bottom to the dust removal port 1-4, carrying away the dust on the laser processing surface.

[0102] Therefore, the gas flow in the annular air channel 3 can be inclined to blow to the dust removal port 1-4 along the side wall of the first sub-cavity 1-2, and the dust at the dust removal port 1-4 can be blown upward as much as possible, which is beneficial to better dust extraction.

[0103] According to some embodiments of the present application, the first sub-cavity 1-2 and the second sub-cavity 2-3 are coaxially arranged.

[0104] The coaxial arrangement of the first sub-cavity 1-2 and the second sub-cavity 2-3 can mean that the axes X of the first sub-cavity 1-2 and the second sub-cavity 2-3 coincide. The end of the second sub-cavity 2-3 away from the base 1 can be a laser incident port 3-1. By arranging the first sub-cavity 1-2 and the second sub-cavity 2-3 coaxially, it is beneficial for the laser to be incident through the laser incident port 3-1 to perform laser processing on the target object at the dust removal port 1-4. In the case of determining that dust removal is required, the gas flow is introduced into the dust removal port 1-4 through the gas supply port 1-3, and the dust is extracted through the dust extraction port 3-2, so that the dust can be removed in time, avoiding secondary pollution. Moreover, by arranging the first sub-cavity 1-2 and the second sub-cavity 2-3 coaxially, the dust at the dust removal port 1-4 can be better extracted through the second sub-cavity 2-3.

[0105] Therefore, by arranging the first sub-cavity 1-2 and the second sub-cavity 2-3 coaxially, it is beneficial to extract the dust blown by the dust removal port 1-4 at the bottom of the first sub-cavity 1-2 through the second sub-cavity 2-3 of the dust removal cover 2, and it is also possible to perform laser processing on the target object at the dust removal port 1-4 through the top end of the second sub-cavity 2-3. After laser processing, dust removal can be performed, which improves the dust removal effect and prevents secondary pollution.

[0106] According to some embodiments of the present application, as shown in FIGS. 1-4, the dust cover 2 comprises an upper cover 23 and a middle cover 22. The upper cover 23 is provided with a laser incidence port 3-1 and at least one dust extraction port 3-2. The middle cover 22 is located between the upper cover 23 and the base 1. The protruding part 2-1 is located on the middle cover 22. The second sub-cavity 2-3 penetrates through the middle cover 22. The laser incidence port 3-1 and the at least one dust extraction port 3-2 are in communication with the second sub-cavity 2-3.

[0107] That is, the combination of the upper cover 23 and the middle cover 22 forms the dust cover 2. The middle cover 22 cooperates with the base 1 to form the annular air channel 3, so as to form the second sub-cavity 2-3 on the dust cover 2 and the laser incidence port 3-1 and the dust extraction port 3-2 in communication with the second sub-cavity 2-3.

[0108] Therefore, the dust cover 2 is jointly constituted by the upper cover 23 and the middle cover 22, which facilitates forming the second sub-cavity 2-3 with a large upper part and a small lower part on the middle cover 22 (i.e., the inner diameter of the end of the second sub-cavity 2-3 away from the upper cover 23 is smaller than the inner diameter of the end close to the upper cover 23), which is conducive to improving the dust extraction effect. By providing the upper cover 23 independent of the middle cover 22, it is convenient to process the required laser incidence port 3-1 and the dust extraction port 3-2 on the upper cover 23, thereby simplifying the manufacturing process.

[0109] According to some embodiments of the present application, the contact interface of the base 1 with the dust cover 2 is formed with an annular buffer cavity 1-1, which surrounds and is in communication with the annular air channel 3. The gas inlet 1-3 is in communication with the buffer cavity 1-1.

[0110] Therefore, the gas inlet enters the annular air channel 3 through the buffer cavity 1-1, further improving the uniformity of the gas flow in the annular air channel 3, achieving omnidirectional gas supply to the dust outlet 1-4, and improving the dust removal effect.

[0111] According to some embodiments of the present application, the gas inlet 1-3 is provided on the base 1.

[0112] At this time, the gas inlet 1-3 is in direct communication with the annular air channel 3.

[0113] Therefore, since the gas inlet 1-3 and the annular air channel 3 are both located on the base 1, it is conducive to achieving gas supply from the gas inlet 1-3 to the annular air channel 3, thereby shortening the gas path.

[0114] According to some embodiments of the present application, as shown in FIGS. 6-9, the dust cover 2 is a one-piece structure. The sidewall of the second sub-cavity 2-3 is provided with at least one dust extraction port 3-2.

[0115] The one-piece structure of the dust cover 2 can mean that the dust cover 2 is integrally formed, which is different from the dust cover 2 composed of the separate upper cover 23 and the middle cover 22 in the above-mentioned embodiments.

[0116] It should be noted that, in the case of the dust removal cover 2 being an integral structure, the implementation structure of the dust removal device is similar to the above-mentioned embodiments.

[0117] For example, in some embodiments, the second sub-cavity 2-3 can pass through the dust removal cover 2, and an end of the second sub-cavity 2-3 away from the base 1 can be the laser incidence port 3-1. Since the second sub-cavity 2-3 is in communication with the first sub-cavity 1-2, an end of the first sub-cavity 1-2 away from the dust removal cover 2 is the dust removal port 1-4. Therefore, the laser incident via the laser incidence port 3-1 can perform laser processing on the target object at the dust removal port 1-4, and the dust generated at the dust removal port 1-4 can be removed immediately after the laser processing, thereby avoiding secondary pollution.

[0118] For another example, in some embodiments, the axes X of the second sub-cavity 2-3 and the first sub-cavity 1-2 can coincide, i.e., coaxially arranged, so as to improve the dust extraction effect and better implement the laser processing.

[0119] For another example, in some embodiments, the sidewall of the second sub-cavity 2-3 can be provided with a plurality of dust extraction ports 3-2, which can be uniformly distributed in a circumferential direction centered on the axis X of the second sub-cavity 2-3, so as to perform comprehensive dust extraction and improve the dust removal effect.

[0120] For another example, in some embodiments, the end surface of the protruding portion 2-1 of the dust removal cover 2 can be flush with the bottom surface of the base 1 away from the dust removal cover 2, and the end surface of the protruding portion 2-1 of the dust removal cover 2 can also be located within the first sub-cavity 1-2 of the base 1, so that the dust removal port 1-4 can closely fit the target object, so that the dust is directed to be extracted away from the second sub-cavity 2-3 of the dust removal cover 2 during the dust extraction process, thereby avoiding the dust from splashing into the surrounding environment and causing secondary pollution.

[0121] For another example, in some embodiments, the sidewall of the protruding portion 2-1 can be provided with at least one opening 2-2 to form a turbine feature, so as to prevent the formation of a tornado airflow in the second sub-cavity 2-3 of the dust removal cover 2 during the dust extraction process, thereby avoiding the phenomenon of dust being sucked back into the dust removal port 1-4.

[0122] Therefore, by providing the dust removal cover 2 in an integral structure, the structure of the dust removal cover 2 can be simplified.

[0123] According to some embodiments of the present application, the air supply port 1-3 is arranged on the dust removal cover 2, and the surface of the dust removal cover 2 in contact with the base 1 forms an annular buffer cavity 1-1 surrounding and in communication with the annular air channel 3, and the air supply port 1-3 is in communication with the buffer cavity 1-1.

[0124] In some embodiments, the dust cover 2 and the base 1 are in sealing contact by forming a ring-shaped groove structure on the surface of the dust cover 2 in contact with the base 1, and the buffer cavity 1-1 is formed by the groove structure, thereby simplifying the manufacturing process of the buffer cavity 1-1.

[0125] Therefore, the air inlet enters the annular air duct 3 through the annular buffer cavity 1-1, further improving the uniformity of gas flow in the annular air duct 3, achieving omnidirectional air supply to the dust removal port 1-4, improving the dust removal effect, and simplifying the structure of the base 1.

[0126] According to some embodiments of the present application, a battery production equipment is provided, which comprises a laser equipment and the dust removal device in the above embodiments. The laser equipment is used for laser processing of the battery, and the dust removal device is used for dust removal of the dust generated by the laser processing. The dust removal port 1-4 of the dust removal device is used for contact with the surface of the battery subjected to laser processing.

[0127] The laser equipment can perform laser processing such as laser cutting, laser welding, and laser cleaning on the target object.

[0128] The contact between the dust removal port 1-4 and the surface of the battery subjected to laser processing can mean that the dust removal port 1-4 is as close as possible to the surface of the battery subjected to laser processing, so as to better direct the dust generated by the laser processing away through the dust cover 2.

[0129] In some embodiments, referring to FIG. 7, the second sub-cavity 2-3 can penetrate the dust cover 2, and an end of the second sub-cavity 2-3 away from the base 1 can be configured as a laser incident port 3-1. The laser of the laser equipment can perform laser processing on the target object at the dust removal port 1-4 through the laser incident port 3-1, so as to timely remove the dust generated after the laser processing, thereby avoiding secondary pollution.

[0130] Therefore, by using the dust removal device in the above embodiments to remove the dust generated by the laser processing of the laser equipment, there is no cleaning dead angle, thereby improving the dust removal effect.

[0131] Referring to FIGS. 1-5, the embodiment of the present application provides a dust removal device. As shown in FIG. 1, the dust removal device comprises a base 1 and a dust cover 2, the dust cover 2 is configured to be assembled on the base 1. The base 1 is provided with a gas inlet 1-3, the base 1 has a first sub-cavity 1-2 penetrating through the base 1, one end of the first sub-cavity 1-2 away from the dust cover is a dust removal port 1-4, the dust removal port 1-4 is used to be in contact with the surface of the target object to be processed by laser. As shown in FIG. 2, the dust cover 2 comprises an upper cover 23 and a middle cover 22, the middle cover 22 is located between the upper cover 23 and the base 1. The dust cover 2 has a second sub-cavity 2-3 penetrating through the middle cover 22, the surface of the middle cover 22 close to the base 1 has a protruding part 2-1, the second sub-cavity 2-3 penetrates through the protruding part 2-1. The upper cover 23 is provided with a laser inlet 3-1 and at least one dust extraction port 3-2, the laser inlet 3-1 and the at least one dust extraction port 3-2 are in communication with the second sub-cavity 2-3, the laser of the laser equipment is processed on the target object at the dust removal port 1-4 through the laser inlet 3-1, and the dust is extracted away through the second sub-cavity 2-3 by the negative pressure formed by the at least one dust extraction port 3-2. As shown in FIG. 4, the sidewall of the protruding part 2-1 has a plurality of openings 2-2 to form a turbine feature. As shown in FIG. 2, the first sub-cavity 1-2 and the second sub-cavity 2-3 are coaxially arranged, the first sub-cavity 1-2 and the second sub-cavity 2-3 are both inverted cone cylinders with large upper and small lower, a part of the protruding part 2-1 is located in the first sub-cavity 1-2, the end surface of the protruding part 2-1 is close to the dust removal port 1-4, and the annular air channel 3 is formed between the protruding part 2-1 and the sidewall of the first sub-cavity 1-2. As shown in FIG. 2, the surface of the base 1 in contact with the dust cover 2 forms an annular buffer cavity 1-1, the annular buffer cavity 1-1 surrounds and communicates with the annular air channel 3, and the gas inlet 1-3 communicates with the annular buffer cavity 1-1. As shown in FIG. 5, the dust removal device can be provided with a plurality of gas inlets 1-3 and a plurality of dust extraction ports 3-2, the plurality of gas inlets 1-3 and the plurality of dust extraction ports 3-2 are distributed around the axis X of the second sub-cavity 2-3, the plurality of gas inlets 1-3 all communicate with the annular buffer cavity 1-1, the plurality of dust extraction ports 3-2 all communicate with the second sub-cavity 2-3, and the gas flow direction of the gas entering the buffer cavity 1-1 through the plurality of gas inlets 1-3 is all counterclockwise or clockwise around the axis X of the second sub-cavity 2-3.

[0132] Referring to FIGS. 6-9, the embodiments of the present application further provide another dust removal device. As shown in FIG. 6, the dust removal device comprises a base 1 and a dust removal cover 2, the dust removal cover 2 is an integral structure integrally formed, and the dust removal cover 2 is configured to be assembled on the base 1. As shown in FIG. 7, the base 1 has a first sub-cavity 1-2 penetrating through the base 1, and the first sub-cavity 1-2 has a dust removal opening 1-4 at an end away from the dust removal cover 2, the dust removal opening 1-4 is configured to be in contact with a surface of a target object to be processed by laser. The dust removal cover 2 has a second sub-cavity 2-3, and a surface of the dust removal cover 2 close to the base 1 has a protruding part 2-1, and the second sub-cavity 2-3 penetrates through the protruding part 2-1. The dust removal cover 2 is provided with a laser entrance 3-1, a dust extraction opening 3-2 and a gas supply opening 1-3, which are all in communication with the second sub-cavity 2-3, and a laser of a laser device is configured to process the target object at the dust removal opening 1-4 via the laser entrance 3-1. As shown in FIG. 9, a sidewall of the protruding part 2-1 has an opening 2-2 to form a turbine feature. The first sub-cavity 1-2 and the second sub-cavity 2-3 are coaxially arranged, the first sub-cavity 1-2 is in the shape of an inverted cone, the second sub-cavity 2-3 is in the shape of a cylinder, a part of the protruding part 2-1 is located in the first sub-cavity 1-2, an end surface of the protruding part 2-1 is close to the dust removal opening 1-4, and an annular air channel 3 is formed between the protruding part 2-1 and a sidewall of the first sub-cavity 1-2. As shown in FIG. 7, a bottom surface of the base 1 in contact with the dust removal cover 2 forms an annular buffer cavity 1-1, the annular buffer cavity 1-1 surrounds and is in communication with the annular air channel 3, the gas supply opening 1-3 is in communication with the annular buffer cavity 1-1, the gas supply opening 1-3 blows toward the dust removal opening 1-4 via the buffer cavity 1-1 and the annular air channel 3 in sequence, and the dust blown up at the dust removal opening 1-4 is extracted via the second sub-cavity 2-3 by a negative pressure formed by the dust extraction opening 3-2.

[0133] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present 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 dust removal device for removing dust when a target object is subjected to laser processing, comprising: a base having a first sub-cavity extending through the base; a dust removal cover configured to be fitted on the base, the dust removal cover having a second sub-cavity, the first sub-cavity and the second sub-cavity being in communication, an end of the first sub-cavity away from the dust removal cover being a dust removal opening, the dust removal opening being configured to be in contact with a surface of the target object to be subjected to laser processing, a surface of the dust removal cover close to the base having a protruding portion, an end face of the second sub-cavity extending through the protruding portion, at least a portion of the protruding portion being located in the first sub-cavity, and a gap being formed between the protruding portion and a side wall of the first sub-cavity to form an annular air channel, a gas inlet of the dust removal device being in communication with the annular air channel, so that gas entering the gas inlet can be blown towards the dust removal opening through the annular air channel.

2. The dust extraction device of claim 1, wherein, The dust removal cover has a plurality of dust extraction openings, the plurality of dust extraction openings being distributed around an axis of the second sub-cavity, and the plurality of dust extraction openings each being in communication with the second sub-cavity.

3. The dust extraction device of claim 1 or 2, wherein, The base and the dust removal cover cooperate at a contact interface to form an annular buffer cavity, the buffer cavity being in communication with the annular air channel and surrounding the annular air channel, and the gas inlet being in communication with the buffer cavity.

4. The dust extraction device of claim 3, wherein, The gas inlet is in tangential communication with the buffer cavity.

5. The dust extraction device of claim 3 or 4, wherein, The dust removal device has a plurality of gas inlets, the plurality of gas inlets being distributed around the buffer cavity, and the direction of gas flow after the gas entering the buffer cavity through the plurality of gas inlets being counterclockwise or clockwise.

6. The dust extraction device of any one of claims 1-5, wherein, The side wall of the protruding portion has at least one opening.

7. The dust extraction device of claim 6, wherein, An included angle a between a length direction of the opening and an axis of the second sub-cavity satisfies: 0°≤a≤90°.

8. The dust extraction device of any one of claims 1-7, wherein, The end face of the protruding portion is close to the dust removal opening.

9. The dust extraction device of claim 8, wherein, A distance d between the end face of the protruding portion and the dust removal opening along an extension direction of the axis of the second sub-cavity satisfies: 0<d≤10 mm.

10. The dust extraction device of any one of claims 1-9, wherein, The end face of the protruding portion is located in the first sub-cavity.

11. The dust extraction device of any one of claims 1-10, wherein, An inner diameter of an end of the first sub-cavity away from the dust removal opening is greater than an inner diameter of an end of the first sub-cavity close to the dust removal opening.

12. The dust extraction device of any one of claims 1-11, wherein, The first sub-cavity and the second sub-cavity are coaxially arranged.

13. The dust extraction device of any one of claims 1-12, wherein, The dust removal cover comprises: an upper cover, the upper cover being provided with a laser incidence opening and at least one dust removal opening; a middle cover located between the upper cover and the base, the protruding portion being located on the middle cover, and the second sub-cavity extending through the middle cover, the laser incidence opening and the at least one dust removal opening each being in communication with the second sub-cavity.

14. The dust extraction device of any one of claims 1-13, wherein, A surface of the base in contact with the dust removal cover is formed with an annular buffer cavity.

15. The dust extraction device of any one of claims 1-14, wherein, The gas inlet is provided on the base.

16. The dust extraction device of any one of claims 1-15, wherein, The dust removal cover is a one-piece structure, and a side wall of the second sub-cavity is provided with at least one dust extraction opening.

17. The dust extraction device of any one of claims 1-16, wherein, The gas inlet is provided on the dust removal cover, and a surface of the dust removal cover in contact with the base is formed with an annular buffer cavity. 18.A battery production device, comprising: a laser device for laser processing of a battery; The dust removal device according to any one of claims 1-17, wherein the dust removal device is used for dust removal of dust generated by the laser treatment, and the dust removal port of the dust removal device is arranged in contact with the surface of the battery subjected to the laser treatment.

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