Dust removal cover, dust removal device and welding equipment

Abstract

The embodiment of the utility model provides a dust removal cover, a dust removal device and welding equipment, and relates to the technical field of batteries. The dust removal cover comprises a first cover body and a second cover body, the first cover body is provided with a first cavity, a first opening and a second opening, and the first opening is used for facing the liquid injection hole; the second cover body is connected to the outside of the first cover body in a surrounding mode, a second cavity is defined by the inner wall face of the side wall of the second cover body and the outer wall face of the side wall of the first cover body, the first cavity is communicated with the second cavity, and the side wall of the second cover body is provided with a dust discharging channel communicated with the second cavity. The first cavity of the dust hood is used for laser welding, the second cavity is used for collecting welding slag and welding ash, most of the welding slag and the welding ash generated in the welding process enter the second cavity and are discharged through the dust discharging channel, laser welding and welding slag space isolation are achieved, the possibility that batteries and welding equipment are polluted by the welding slag and the welding ash is reduced, and the welding efficiency is improved. And the welding quality and the product yield can be improved to a certain extent.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a dust removal cover, a dust removal device, and a welding device. Background Art

[0002] Batteries are widely used in electronic devices, such as mobile phones, laptops, battery cars, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc.

[0003] During the production process of batteries, it is necessary to perform sealing nail welding on the liquid injection holes of the batteries. A large amount of welding ash and welding slag will be generated during the welding process, which is likely to contaminate the batteries and the welding equipment, and reduce the welding quality and product yield. Summary of the Utility Model

[0004] The present application provides a dust removal cover, a dust removal device, and a welding device, which can discharge welding slag and welding ash during the sealing nail welding process, and reduce the possibility of welding slag and welding ash contaminating the batteries and the welding equipment.

[0005] In a first aspect, an embodiment of the present application provides a dust removal cover, which includes a first cover body and a second cover body. The first cover body is provided with a first cavity, a first opening at one end of the opposite ends of the first cavity, and a second opening at the other end of the opposite ends of the first cavity. The second cover body is surrounded and connected to the outside of the first cover body. The inner wall surface of the side wall of the second cover body and the outer wall surface of the side wall of the first cover body have a gap to form a second cavity. The second cover body has a first end close to the first opening and a second end away from the first opening. The second cavity communicates with the first cavity at the first end. The side wall of the second cover body is provided with a dust discharge channel communicating with the second cavity. In the present application, the connection between the second cavity and the first cavity is arranged at the first end close to the welding position, so that the welding slag and welding ash generated by the sealing nail welding at the first opening can directly enter the second cavity. The first cavity of the dust removal cover is used as the welding operation channel for the sealing nail, and the second cavity is used to collect the welding slag and welding ash, realizing the spatial isolation between the laser welding and the welding slag. Most of the welding slag and welding ash generated during the welding process enter the second cavity and are discharged through the dust discharge channel, reducing the possibility of welding slag and welding ash contaminating the batteries and the welding equipment, and can improve the welding quality and product yield to a certain extent.

[0006] In some embodiments of the present application, the second cover body is provided with a third opening at the first end, the first opening is located between the second opening and the third opening, and the first opening and the third opening form a flow channel connecting the first cavity and the second cavity. In the present application, a flow channel is formed through the first opening, the third opening and the interval between them, which is convenient for the welding slag and welding ash to enter the second cavity.

[0007] In some embodiments of the present application, along the arrangement direction of the first opening and the second opening, the distance between the first opening and the third opening is 2 mm - 10 mm. By designing the distance between the first opening and the third opening to be 1 mm - 20 mm, the present application meets the requirement that the welding slag splashed out from the first opening enters the second cavity.

[0008] In some embodiments of the present application, along the direction from the second opening to the first opening, the dimension of the first cavity in the first direction gradually decreases, and the first direction intersects with the arrangement direction of the first opening and the second opening. Through the above design, the present application makes the first cavity gradually narrow from the second opening to the first opening, and the air flow entering the first cavity from the second opening has a faster flow rate closer to the first opening, further improving the rate at which the welding slag and welding ash enter the second cavity.

[0009] In some embodiments of the present application, along the direction from the second opening to the first opening, the dimension of the second cavity in the first direction gradually decreases. Through the above design, the present application makes the inner wall dimension of the second cavity have better consistency in the second direction along the first opening to the second opening.

[0010] In some embodiments of the present application, the first cover body is provided with a first connecting portion at the second opening, which extends along the first direction and is close to the second cover body, and the first connecting portion is connected to the second cover body, and the first direction intersects with the arrangement direction of the first opening and the second opening. By configuring the first connecting portion on the first cover body, the present application facilitates the connection between the first cover body and the second cover body.

[0011] In some embodiments of the present application, the first connecting portion surrounds the first cover body and closes the gap between the first cover body and the second cover body at one end facing away from the first opening. By closing one end of the second cover body facing away from the first opening with the first connecting portion, the present application reduces the possibility of welding slag and dust overflowing from the top of the second cover body to pollute the welding equipment.

[0012] In some embodiments of the present application, the first connecting portion is provided with a first connecting hole and a first connecting member inserted into the first connecting hole, and the first connecting member is connected to the second cover body. By connecting the second cover body through the first connecting hole and the first connecting member, the present application has a simple structure and is convenient and fast to install.

[0013] In some embodiments of the present application, a second connecting portion is provided on the side wall of the second cover body, and the second connecting portion is used for installing a negative pressure dust suction assembly. By configuring the second connecting portion, the present application facilitates the docking of the second cover body with the negative pressure dust suction assembly.

[0014] In some embodiments of the present application, the second connecting portion includes a plurality of third connecting holes formed in the side wall of the second cover body, and the third connecting holes are used for installing the negative pressure dust suction assembly. The present application connects the negative pressure dust suction assembly by providing the third connecting holes, with a simple structure and easy processing.

[0015] In some embodiments of the present application, one end of the second cover body close to the first opening is provided with a third connecting portion extending in the first direction, and the third connecting portion is used for connecting the body of the welding equipment. The first direction intersects the arrangement direction of the first opening and the second opening. By configuring the third connecting portion to connect the body of the welding equipment, the present application can ensure that the entire dust removal cover can be installed and fixed on the body, ensuring the stability of the dust removal cover during the welding process.

[0016] In some embodiments of the present application, the third connecting portion includes a fourth connecting hole formed in the third connecting portion, and the fourth connecting hole is used for connecting the body. The present application connects the body of the welding equipment by providing the fourth connecting hole, with a simple structure and easy processing.

[0017] In some embodiments of the present application, the distance range between the inner wall surface of the side wall of the second cover body and the outer wall surface of the side wall of the first cover body is 1 mm - 30 mm. By designing the side walls of the second cover body and the first cover body with the above values, the present application can satisfy the flow of welding slag and welding ash into the dust discharge channel through the second cover body and be discharged.

[0018] In some embodiments of the present application, the maximum dimension of the first opening in the direction perpendicular to the arrangement direction of the first opening and the second opening is 10 mm - 50 mm. Through the above structural design, the present application can satisfy that the range of the first opening can cover the area above the liquid injection hole.

[0019] In some embodiments of the present application, the maximum dimension of the second opening in the direction perpendicular to the arrangement direction of the first opening and the second opening is 15 mm - 50 mm. Through the above structural design, the present application can satisfy the entry of the laser of the laser welding equipment.

[0020] In some embodiments of the present application, the extending direction of the dust discharge channel forms an angle less than or equal to 90° with the second direction, and the second direction is the arrangement direction of the first opening and the second opening. The present application designs the angle between the dust discharge channel and the second direction to be less than or equal to 90°, and designs the dust discharge channel to have a dust discharge port, so that the welding slag and dust can be directly discharged from the dust discharge port at the fourth end.

[0021] In some embodiments of the present application, the included angle range between the extending direction of the dust exhaust channel and the second direction is 15 - 90°. In the present application, the included angle between the dust exhaust channel and the second direction is designed to be 15 - 90°, which facilitates the discharge of welding slag and welding ash.

[0022] In a second aspect, an embodiment of the present application provides a dust removal device, including a negative pressure dust suction assembly and a dust removal cover as described in any one of the above technical solutions, and the dust exhaust channel of the dust removal cover is communicated with the negative pressure dust suction assembly.

[0023] In a third aspect, an embodiment of the present application provides a welding device, including a machine body, a welding device, and a dust removal device as described in the above technical solutions, and both the welding device and the dust removal device are installed on the machine body. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0025] Figure 1 Structural schematic diagram of the dust removal cover provided by some embodiments of the present application;

[0026] Figure 2 Side view of the dust removal cover provided by some embodiments of the present application;

[0027] Figure 3 Partial schematic diagram of the dust removal cover provided by some embodiments of the present application;

[0028] Figure 4 Cross-sectional view of the dust removal cover provided by some embodiments of the present application;

[0029] Figure 5 Structural schematic diagram of the dust removal device provided by some embodiments of the present application;

[0030] Figure 6 Partial structural schematic diagram of the welding device provided by some embodiments of the present application.

[0031] The reference numerals in the specific embodiments are as follows:

[0032] 1000, welding device;

[0033] 100, dust removal device;

[0034] 10, dust removal cover;

[0035] 11. First housing; 111. First cavity; 112. First opening; 113. Second opening; 114. First connecting portion; 1141. First connecting hole; 1142. First connecting member

[0036] 12. Second housing; 121. Second cavity; 122. Dust exhaust passage; 123. First end; 124. Second end; 125. Third opening; 126. Second connecting portion; 1261. Third connecting hole; 127. Third connecting portion; 1271. Fourth connecting hole

[0037] 20. Negative pressure dust suction assembly

[0038] 200. Machine body

[0039] 300. Welding device

[0040] X. First direction; Y. Second direction; Z. Third direction Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application

[0042] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the description of the present application in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "provided with" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship

[0043] Referring to "embodiments" in the present application means that specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments

[0044] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "linked", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0045] In the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents an "or" relationship between the front and back associated objects.

[0046] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of simplicity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0047] The term "a plurality of" as used in the present application refers to two or more (including two).

[0048] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application can include a battery module or a battery pack, etc. The battery generally includes a battery box for encapsulating one or more battery cells. The battery box can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0049] The battery cells mentioned in the embodiments of the present application can be lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, magnesium-ion battery cells, etc., and the embodiments of the present application do not limit this. The battery cells can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, and the embodiments of the present application also do not limit this.

[0050] The battery cell mentioned in the embodiments of the present application may include an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector; the positive current collector includes a positive coating area and a positive tab connected to the positive coating area. The positive coating area is coated with the positive active material layer, and the positive tab is not coated with the positive active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes a positive active material, and the positive active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode plate includes a negative current collector and a negative active material layer, and the negative active material layer is coated on the surface of the negative current collector; the negative current collector includes a negative coating area and a negative tab connected to the negative coating area. The negative coating area is coated with the negative active material layer, and the negative tab is not coated with the negative active material layer. The material of the negative current collector can be copper, and the negative active material layer includes a negative active material, and the negative active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0051] The battery cell described in the embodiments of the present application is applicable to batteries and electrical devices using the batteries. The electrical devices can be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc.; the spacecraft includes airplanes, rockets, space shuttles, and spaceships, etc.; the electric toys include fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc.; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose special restrictions on the above-mentioned electrical devices.

[0052] Next, the embodiments of the present application will be described in detail.

[0053] Currently, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0054] During the production process of the battery, it is necessary to perform sealing nail welding on the liquid injection hole of the battery. When welding the liquid injection hole of the battery, a large amount of welding ash and slag are generated during the welding process, which easily causes pollution to the battery and the welding equipment. This kind of pollution not only reduces the welding quality but also leads to a decrease in the product yield.

[0055] Therefore, when performing sealing nail welding, effective measures need to be taken to avoid the pollution of the battery and the equipment caused by the welding ash and slag generated during the welding process, so as to ensure the stability of the welding quality and the product yield.

[0056] In view of this, the present application provides a technical solution. By configuring a dust removal cover on the welding equipment, and the dust removal cover is provided with a first cavity and a second cavity. During the welding process, the welding slag and ash generated enter the second cavity and are discharged through the dust exhaust channel, reducing the possibility of the welding slag and ash polluting the battery and the welding equipment, and can improve the welding quality and the product yield to a certain extent.

[0057] The following will introduce the dust removal cover provided by the embodiments of the present application in conjunction with the attached Figure 1-6 drawings.

[0058] In conjunction with the attached Figure 1 - attached Figure 4 As shown in the drawings, the embodiments of the present application provide a dust removal cover 10, which is used to cover the liquid injection hole when welding the sealing nail of the liquid injection hole of the battery cell. The dust removal cover 10 includes a first cover body 11 and a second cover body 12. The first cover body 11 is provided with a first cavity 111, a first opening 112 located at one end of the opposite ends of the first cavity 111, and a second opening 113 located at the other end of the opposite ends of the first cavity 111. The first opening 112 is used to face the liquid injection hole; the second cover body 12 is surrounded and connected to the outside of the first cover body 11. There is a gap between the inner wall surface of the side wall of the second cover body 12 and the outer wall surface of the side wall of the first cover body 11 to form a second cavity 121. The second cavity 121 is configured to communicate with the first cavity 111, and the side wall of the second cover body 12 is provided with a dust exhaust channel 122 communicating with the second cavity 121.

[0059] The first cover body 11 and the second cover body 12 of this embodiment can be integrally formed during processing, or can be fixedly connected by means of welding, bonding, bolt connection, etc. The first cover body 11 and the second cover body 12 can be made of metal or ceramic. Of course, other materials with relatively high hardness and high temperature resistance can also be used to make the first cover body 11 and the second cover body 12 of this embodiment, such as carbon fiber composite materials, etc., and this embodiment will not list them in detail.

[0060] The first cover body 11 of this embodiment has a first surface and a second surface opposite to each other, and the first cavity 111 is located between the first surface and the second surface, and penetrates the first surface to form a first opening 112 located on the first surface and a second opening 113 located on the second surface. The first opening 112 of this embodiment is used to face the injection hole and the sealing pin during welding, so that the laser entering through the second opening 113 can directly irradiate the sealing pin and the injection hole to achieve welding.

[0061] The second cover body 12 of this embodiment is connected to the outside of the first cover body 11, and there is a spacing or gap along the first direction X between the inner wall surface of the side wall of the second cover body 12 and the outer wall surface of the side wall of the second cover body 12. The spacing or gap forms a second cavity 121 that is approximately annular. The second cavity 121 is connected to the first cavity 111, and the connection position may be located in the lower middle part or the bottom of the second cover body 12, so that welding slag and welding ash can directly enter the second cavity 121.

[0062] The dust exhaust channel 122 of this embodiment can be understood as a hole opened on the side wall of the second cover body 12. There are multiple ways to discharge welding slag and welding ash in the dust exhaust channel 122. One is to directly perform negative pressure suction on the dust exhaust channel 122, and the other is to use positive pressure wind at the second opening 113 to drive the welding slag and welding ash to be discharged in the dust exhaust channel 122. The first method has better efficiency and effect in removing welding slag and welding ash than the second method.

[0063] When welding the sealing pin at the injection hole, the dust cover 10 of this embodiment is provided with the injection hole and the sealing pin, the second cover body 12 surrounds the injection hole and the sealing pin, and ensures that the first opening 112 and the second opening 113 of the first cover body 11 are directly opposite to the sealing pin, and the second opening 113 can be used for the laser of the welding equipment 1000 to extend into the welding operation, and the welding slag and welding ash generated during the welding process enter the second cavity 121 and are discharged from the dust exhaust channel 122, thereby reducing the possibility of welding slag and welding ash contaminating the battery and the welding equipment 1000, and can improve the welding quality and product yield to a certain extent.

[0064] In some examples, optionally, the second cover body 12 has a first end 123 close to the first opening 112 and a second end 124 away from the first opening 112 , and the second cavity 121 is connected to the first cavity 111 at the first end 123 .

[0065] The first end 123 of this embodiment can be understood as the second cover body 12 Figure 3 and Figure 4 It should be understood that the first end 123 and the second end 124 described in this embodiment do not specifically refer to end faces, but are ends including end faces and having an end length along the second direction Y.

[0066] There are various implementation manners in which the second cavity 121 of this embodiment communicates with the first cavity 111 at the first end 123. For example, when the lower end surface of the first end 123 is flush with the first opening 112, a channel is formed in the first end 123 to achieve the communication between the second cavity 121 and the first cavity 111. For another example, when the lower end surface of the first end 123 is lower than the first opening 112, the communication between the first cavity 111 and the second cavity 121 can be achieved by forming a channel or an opening structure.

[0067] By arranging the communication between the second cavity 121 and the first cavity 111 at the first end 123 close to the welding position, the welding slag and welding ash generated by the sealing nail welding at the first opening 112 can directly enter the second cavity 121, improving the discharge efficiency of the welding slag and welding ash.

[0068] In some examples, optionally, the second cavity 121 is provided with a third opening 125 at the first end 123. The first opening 112 is located between the second opening 113 and the third opening 125, and the first opening 112 and the third opening 125 form a flow channel for communicating the first cavity 111 and the second cavity 121.

[0069] The size of the third opening 125 of this embodiment is larger than that of the first opening 112. During welding, most of the welding slag generated by the sealing nail is located between the first opening 112 and the second opening 113, and can directly enter the second cavity 121 through the flow channel formed by the first opening 112 and the third opening 125, and is finally discharged by the dust discharge channel 122 of this embodiment.

[0070] In some examples, the distance a between the first opening 112 and the third opening 125 in the second direction Y is 2 mm - 10 mm.

[0071] For example, the distance a between the first opening 112 and the third opening 125 in the second direction Y can be 2 mm, 3 mm, 6 mm, 9 mm, 10 mm, etc. By designing the distance a between the first opening 112 and the third opening 125 to be 1 mm - 20 mm, the requirement that the welding slag splashed from the first opening 112 enters the second cavity 121 is satisfied.

[0072] In some embodiments of the present application, the distance a between the first opening 112 and the third opening 125 in the second direction Y is 4 mm - 8 mm.

[0073] For example, 4 mm, 5 mm, 6 mm, 7 mm, and 8 mm. By designing the distance between the first opening 112 and the third opening 125 to be 4 mm - 8 mm, the covering of the first cavity 111 during the sealing nail welding can be satisfied, and at the same time, it is convenient for the welding slag and welding ash to enter the second cavity 121.

[0074] Combined with the attached Figure 4As shown, in some examples, along the second opening 113 to the first opening 112, the size of the first cavity 111 gradually decreases in the first direction X, and the first direction X intersects the arrangement direction of the first opening 112 and the second opening 113.

[0075] The first direction X can be perpendicular to the arrangement direction of the first opening 112 and the second opening 113. The fact that the size of the first cavity 111 gradually decreases in the first direction X can be understood as the cross-section of the inner wall surface of the first cover 11 in this embodiment being arc-shaped, or inclined with respect to the second direction Y, so that the first cavity 111 gradually narrows from the second opening 113 to the first opening 112, forming an inverted conical tube-like structure. This structure causes the air flow entering the first cavity 111 from the second opening 113 to have a faster flow rate closer to the first opening 112, and can carry away the welding slag and welding ash faster, further increasing the rate of the welding slag and welding ash entering the second cavity 121.

[0076] In some examples, optionally, along the second opening 113 to the first opening 112, the size of the second cavity 121 gradually decreases in the first direction X.

[0077] Along the second direction Y (the arrangement direction of the first opening 112 and the second opening 113), this structural design makes the size of the second cavity 121 in the first direction X have better consistency. At two adjacent locations along the second direction Y, the cross-sectional sizes of the second cavity 121 are approximately equal, ensuring better flow of the welding slag and welding ash in the second cavity 121.

[0078] In some examples, optionally, the first cover 11 is provided with a first connecting portion 114 extending along the first direction X and close to the second cover 12 at the second opening 113, and the first connecting portion 114 is connected to the second cover 12.

[0079] In this embodiment, by configuring the first connecting portion 114 on the first cover 11, it is convenient to connect the first cover 11 and the second cover 12.

[0080] The first connecting portion 114 of this embodiment can be of any shape, such as plate-shaped, ring-shaped, etc. For example, when the cross-sectional shape of the first cover 11 in this embodiment is annular, the first connecting portion 114 of this embodiment can be understood as an annular flange. The first connecting portion 114 can be integrally processed with the first cover 11, or fixed to the edge of the top of the first cover 11 by welding or other means.

[0081] There can also be various connection methods between the first cover 11 and the second cover 12 in this embodiment, such as being integrally formed during processing, or achieving connection by welding, threaded connection, snap connection, bonding, etc. This embodiment does not list them one by one.

[0082] In some examples, optionally, the first connecting portion 114 surrounds the first housing 11 and closes the gap between the first housing 11 and the second housing 12 at one end facing away from the first opening 112.

[0083] One end of the first housing 11 and the second housing 12 of this embodiment facing away from the first opening 112 can be understood as the upper ends of the first housing 11 and the second housing 12 in Figure 4 . In this embodiment, the first connecting portion 114 closes one end of the second housing 12 facing away from the first opening 112, reducing the possibility of welding slag and dust overflowing from the top of the second housing 12 and polluting the welding equipment 1000. At the same time, the first connecting portion 114 also functions to connect the first housing 11 and the second housing 12, serving multiple purposes in one body.

[0084] In some examples, optionally, the first connecting portion 114 is provided with a first connecting hole 1141 and a first connecting member 1142 inserted into the first connecting hole 1141, and the first connecting member 1142 is connected to the second housing 12.

[0085] A second connecting hole (not shown in the figure) can be opened on the second housing 12. The first connecting hole 1141 and the second connecting hole of this embodiment can be through holes. In this case, the first connecting member 1142 can be a fastener such as a rivet. It can also be that at least one of the first connecting hole 1141 and the second connecting hole in this embodiment is a threaded hole. In this case, the first connecting member 1142 can be a structure such as a bolt or a screw.

[0086] When assembling the first housing 11 and the second housing 12, the first connecting hole 1141 and the second connecting hole are docked by inserting or screwing the first connecting member 1142, with a simple structure and convenient and fast installation.

[0087] In some examples, optionally, a second connecting portion 126 adjacent to the dust exhaust channel 122 is opened on the side wall of the second housing 12, and the second connecting portion 126 is used to connect the negative pressure dust suction assembly 20.

[0088] Combined with the attached Figure 1 and the attached Figure 5 As shown, the second connecting portion 126 of this embodiment is used to externally connect the pipeline of the negative pressure dust suction assembly 20, and the connection mode between the second connecting portion 126 and the pipeline can be bolt connection, plug connection, snap connection, welding and other methods.

[0089] In some examples, optionally, the second connecting portion 126 includes a plurality of third connecting holes 1261 opened on the side wall of the second housing 12.

[0090] The third connection holes 1261 of this embodiment can be screw holes, such that a plurality of the third connection holes 1261 are arranged around the dust exhaust channel 122 to form a structure similar to a connection flange, facilitating the docking of the pipeline of the negative pressure dust suction assembly 20. It not only has a simple structure and is easy to process, but also has a stable connection in terms of the assembly direction.

[0091] In some examples, optionally, one end of the second cover 12 close to the first opening 112 is provided with a third connection portion 127 extending along the first direction X, and the third connection portion 127 is used to connect the body 200 of the welding device 1000.

[0092] Combined with the attached Figure 1 and the attached Figure 6 As shown, the second cover 12 of this embodiment can be installed on the body 200 of the welding device 1000, and the body 200 of the welding device 1000 can drive the second cover 12 to move to the battery cell so that the first opening 112 is aligned with the liquid injection hole.

[0093] By configuring the third connection portion 127 to connect the body 200 of the welding device 1000 in this embodiment, it can ensure that the entire dust removal cover 10 can be installed and fixed on the body 200, ensuring the stability of the dust removal cover 10 during the welding process.

[0094] Similar to the aforementioned second connection portion 126 and first connection portion 114, there are various connection methods between the third connection portion 127 of this embodiment and the body 200 of the welding device 1000, such as integral molding connection, welding, threaded connection, snap connection, etc., and this embodiment will not list them one by one.

[0095] In some examples, optionally, the third connection portion 127 includes a fourth connection hole 1271 formed on the third connection portion 127.

[0096] The fourth connection hole 1271 of this embodiment can be a through hole or a threaded hole, and the fourth connection hole 1271 and the body 200 of the welding device 1000 can be docked through structures such as screws, bolts, and rivets. The structure is simple and easy to process.

[0097] In some examples, optionally, the range of the distance b between the inner wall surface of the side wall of the second cover 12 and the outer wall surface of the side wall of the first cover 11 is 1 mm - 30 mm.

[0098] For example, b can be 1 mm, 5 mm, 10 mm, 15 mm, 20 mm, 30 mm, etc. By designing the side walls of the second cover 12 and the first cover 11 to the above values, it can meet the requirement that the welding slag and welding ash flow into the dust exhaust channel 122 through the second cover 12 and are discharged.

[0099] In some examples, optionally, the distance b between the inner wall surface of the side wall of the second cover 12 and the outer wall surface of the side wall of the first cover 11 ranges from 1 mm to 5 mm.

[0100] For example, b can be 1.5 mm, 2.5 mm, 3 mm, 4 mm, 4.5 mm, etc. By designing the side walls of the second cover 12 and the first cover 11 with the above values, the flow of welding slag and welding ash of most specifications in the second cavity 121 can be satisfied.

[0101] In some examples, optionally, the maximum dimension c of the first opening 112 in the direction perpendicular to the arrangement direction of the first opening 112 and the second opening 113 is 10 mm - 50 mm.

[0102] The direction perpendicular to the arrangement direction of the first opening 112 and the second opening 113 can be the first direction X in the figure.

[0103] In this embodiment, c can be 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, etc. Through the above structural design, it can be satisfied that the range of the first opening 112 can cover the area above the liquid injection hole.

[0104] In some examples, optionally, the maximum dimension c of the first opening 112 in the direction perpendicular to the arrangement direction of the first opening 112 and the second opening 113 is 15 mm - 30 mm.

[0105] For example, c can be 16.5 mm, 20.5 mm, 22.5 mm, 25.5 mm, 28.5 mm, etc. Through this size design of the first opening 112, it can be satisfied that the range of the first opening 112 can cover the area above the liquid injection hole, and at the same time, the possibility of affecting the entry of welding slag and welding ash into the second cavity 121 due to the too large size of the first opening 112 can be reduced.

[0106] In some examples, optionally, the maximum dimension d of the second opening 113 in the direction perpendicular to the arrangement direction of the first opening 112 and the second opening 113 is 15 mm - 50 mm.

[0107] For example, d can be 15 mm, 18 mm, 25 mm, 35 mm, 50 mm, etc. In this embodiment, through this size design of the second opening 113, the entry of the laser of the laser welding device 1000 can be satisfied.

[0108] In some examples, optionally, the maximum dimension d of the second opening 113 in the first direction X perpendicular to the arrangement direction of the first opening 112 and the second opening 113 is 18 mm - 30 mm.

[0109] For example, d can be 20mm, 22mm, 24mm, 26mm, 30mm, etc. Through this design of the size of the second opening 113 in this embodiment, it can meet the entry of the laser of the welding device 1000, and at the same time reduce the possibility of welding slag entering the welding assembly due to the over-large second opening 113.

[0110] In some examples, optionally, the extending direction of the dust exhaust channel 122 forms an angle less than or equal to 90° with the second direction Y, and the second direction Y is the arrangement direction of the first opening 112 and the second opening 113.

[0111] The dust exhaust channel 122 of this embodiment can be understood as a pore formed on the side wall of the second cover 12. Therefore, the extending direction of the dust exhaust channel 122 can be understood as the opening direction or the length direction of the pore. The dust exhaust channel 122 includes opposite third and fourth ends. The third end is communicated with the second cavity 121, and a dust exhaust port is provided at the fourth end. The first end 123 of the dust exhaust channel 122 is directly communicated with the second cavity 121, and the dust exhaust port is used to be directly communicated with the pipeline of the aforementioned negative pressure dust suction assembly 20.

[0112] In this embodiment, the angle between the extending direction (the third direction Z) of the dust exhaust channel 122 and the second direction Y is designed to be less than or equal to 90°, and the dust exhaust channel 122 is designed to have a dust exhaust port, so that the welding slag and dust can be directly discharged from the dust exhaust port at the fourth end.

[0113] In some examples, optionally, the range of the angle formed by the extending direction of the dust exhaust channel 122 and the second direction Y is 15 - 90°.

[0114] For example, in this application, the angle between the extending direction (the third direction Z in the figure) of the dust exhaust channel 122 and the second direction Y is designed to be 15°, 25°, 35°, 45°, 90°, etc., which is convenient for the discharge of welding slag and welding ash.

[0115] Combined with the attached Figure 5 As shown again, the embodiment of this application provides a dust removal device 100, including a negative pressure dust suction assembly 20 and the dust removal cover 10 of the above technical solution. The negative pressure dust suction assembly 20 is connected to the dust removal cover 10, and the pipeline of the negative pressure dust suction assembly 20 is communicated with the dust exhaust channel 122 of the dust removal cover 10.

[0116] Through the negative pressure generated by the negative pressure dust suction assembly 20, the welding slag and welding ash between the first opening 112 and the third opening 125 can be negatively adsorbed, so that the welding slag and welding ash can quickly separate from the welding operation surface and be discharged to the negative pressure dust suction assembly 20 through the second cavity 121 and the dust exhaust channel 122.

[0117] Combined with the attached Figure 6As shown in the figure, an embodiment of the present application provides a welding device 1000, including a welding device 300, a machine body 200, and a dust removal device 100 as described in the above technical solution. The welding device 300 and the above-mentioned dust removal device 100 are both installed on the machine body 200. The welding device 300 may include a laser welder, and the welding device 300 performs welding operations through the second opening 113 of the dust removal hood 10.

[0118] Finally, please refer to the appendix Figure 1-6, an embodiment of the present application provides a dust removal cover 10, which is used to cover the liquid injection hole when welding a sealing nail to the liquid injection hole of a battery cell. The dust removal cover 10 includes a first cover body 11 and a second cover body 12. The first cover body 11 is provided with a first cavity 111, a first opening 112 at one end of the opposite ends of the first cavity 111, and a second opening 113 at the other end of the opposite ends of the first cavity 111. The first opening 112 is used to face the liquid injection hole; the second cover body 12 is surrounded and connected to the outside of the first cover body 11. There is a gap between the inner wall surface of the side wall of the second cover body 12 and the outer wall surface of the side wall of the first cover body 11 to form a second cavity 121. The second cavity 121 is configured to communicate with the first cavity 111. The side wall of the second cover body 12 is provided with a dust discharge channel 122 communicating with the second cavity 121. The second cover body 12 has a first end 123 close to the first opening 112 and a second end 124 away from the first opening 112. The second cavity 121 communicates with the first cavity 111 at the first end 123. The second cover body 12 is provided with a third opening 125 at the first end 123. The first opening 112 is located between the second opening 113 and the third opening 125. The first opening 112 and the third opening 125 form a flow channel communicating the first cavity 111 and the second cavity 121. Along the arrangement direction of the first opening 112 and the second opening 113, the distance between the first opening 112 and the third opening 125 is 2 mm - 10 mm. Along the arrangement direction of the first opening 112 and the second opening 113, the distance between the first opening 112 and the third opening 125 is 4 mm - 8 mm. Along the second opening 113 to the first opening 112, the size of the first cavity 111 gradually decreases in the first direction X, and the first direction X is perpendicular to the arrangement direction of the first opening 112 and the second opening 113. Along the second opening 113 to the first opening 112, the size of the second cavity 121 gradually decreases in the first direction X. The first cover body 11 is provided with a first connecting portion 114 extending along the first direction X and close to the second cover body 12 at the second opening 113. The first connecting portion 114 is connected to the second cover body 12. The first direction X is perpendicular to the arrangement direction of the first opening 112 and the second opening 113. The first connecting portion 114 surrounds the first cover body 11 and closes the gap at one end of the first cover body 11 and the second cover body 12 away from the first opening 112. The first connecting portion 114 is provided with a first connecting hole 1141 and a first connecting member 1142 inserted into the first connecting hole 1141. The first connecting member 1142 is connected to the second cover body 12. The side wall of the second cover body 12 is provided with a second connecting portion 126 adjacent to the dust discharge channel 122. The second connecting portion 126 is used to connect a negative pressure dust suction assembly 20. The second connecting portion 126 includes a plurality of third connecting holes 1261 opened on the side wall of the second cover body 12.One end of the second cover 12 close to the first opening 112 is provided with a third connecting portion 127 extending along the first direction X. The third connecting portion 127 is used to connect the body 200 of the welding device 1000. The first direction X is perpendicular to the arrangement direction of the first opening 112 and the second opening 113. The third connecting portion 127 includes a fourth connecting hole 1271 formed in the third connecting portion 127. The distance range between the inner wall surface of the side wall of the second cover 12 and the outer wall surface of the side wall of the first cover 11 is 1 mm - 30 mm. The distance range between the inner wall surface of the side wall of the second cover 12 and the outer wall surface of the side wall of the first cover 11 is 1 mm - 5 mm. The size of the first opening 112 in the first direction X is 10 mm - 50 mm, and the first direction X is perpendicular to the arrangement direction of the first opening 112 and the second opening 113. The size of the first opening 112 in the first direction X is 15 mm - 30 mm. The size of the second opening 113 in the first direction X is 15 mm - 50 mm, and the first direction X is perpendicular to the arrangement direction of the first opening 112 and the second opening 113. The size of the second opening 113 in the first direction X is 18 mm - 30 mm. The extending direction of the dust exhaust channel 122 forms an angle less than or equal to 90° with the second direction Y, and the second direction Y is the arrangement direction of the first opening 112 and the second opening 113. The angle range formed by the extending direction of the dust exhaust channel 122 and the second direction Y is 15 - 90°.

[0119] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0120] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A dust removal hood, characterized in that: include: A first cover body, the first cover body having a first cavity, a first opening located at one of two opposite ends of the first cavity, and a second opening located at the other of two opposite ends of the first cavity; A second cover body, the second cover body is arranged and connected to the outside of the first cover body, the inner wall surface of the side wall of the second cover body and the outer wall surface of the side wall of the first cover body have a gap to form a second cavity, the second cover body has a first end close to the first opening and a second end away from the first opening, the second cavity is connected with the first cavity at the first end, and the side wall of the second cover body is provided with a dust exhaust channel connected with the second cavity.

2. The dust cover according to claim 1, characterized in that: The second cover body is provided with a third opening at the first end, the first opening is located between the second opening and the third opening, and the first opening and the third opening form a flow passage connecting the first cavity and the second cavity.

3. The dust cover according to claim 2, characterized in that: Along the arrangement direction of the first opening and the second opening, the distance between the first opening and the third opening is 2 mm-10 mm.

4. The dust cover according to claim 1, characterized in that: From the second opening to the first opening, a size of the first cavity in a first direction gradually decreases, and the first direction intersects with an arrangement direction of the first opening and the second opening.

5. The dust cover according to claim 4, characterized in that: From the second opening to the first opening, a size of the second cavity in the first direction gradually decreases.

6. The dust cover according to claim 1, characterized in that: The first cover body is provided with a first connecting portion extending along a first direction and close to the second cover body at the second opening, the first connecting portion is connected to the second cover body, and the first direction intersects with the arrangement direction of the first opening and the second opening.

7. The dust cover according to claim 6, characterized in that: The first connecting portion is disposed around the first cover body and closes a gap between the first cover body and the second cover body at an end away from the first opening.

8. The dust cover according to claim 7, characterized in that: The first connecting portion is provided with a first connecting hole and a first connecting member inserted into the first connecting hole, and the first connecting member is connected to the second cover body.

9. The dust cover according to claim 1, characterized in that: The side wall of the second cover body is provided with a second connecting portion, and the second connecting portion is used for installing a negative pressure dust collection component.

10. The dust cover according to claim 9, characterized in that: The second connecting portion includes a plurality of third connecting holes opened on the side wall of the second cover body, and the third connecting holes are used to connect the negative pressure dust collection assembly.

11. The dust cover according to claim 1, characterized in that: A third connection portion extending along a first direction is provided at one end of the second cover body close to the first opening, and the third connection portion is used to connect to a body of the welding device. The first direction intersects with an arrangement direction of the first opening and the second opening.

12. The dust cover according to claim 11, characterized in that: The third connection portion includes a fourth connection hole opened on the third connection portion, and the fourth connection hole is used for connecting to the body.

13. The dust cover according to claim 1, characterized in that: The distance between the inner wall surface of the side wall of the second cover body and the outer wall surface of the side wall of the first cover body is in the range of 1 mm to 30 mm.

14. The dust cover according to claim 1, characterized in that: The maximum dimension of the first opening in a direction perpendicular to an arrangement direction of the first opening and the second opening is 10 mm to 50 mm.

15. The dust cover according to claim 1, characterized in that: The maximum dimension of the second opening in a direction perpendicular to the arrangement direction of the first opening and the second opening is 15 mm to 50 mm.

16. The dust cover according to claim 1, characterized in that: The extension direction of the dust exhaust channel forms an angle less than or equal to 90° with a second direction, and the second direction is an arrangement direction of the first opening and the second opening.

17. The dust cover according to claim 16, characterized in that: The angle between the extension direction of the dust exhaust channel and the second direction is in the range of 15-90°.

18. A dust removal device, characterized in that: It comprises a negative pressure dust suction component and a dust removal hood as described in any one of claims 1 to 17, wherein the dust exhaust passage of the dust removal hood is connected to the negative pressure dust suction component.

19. A welding device, characterized in that: It comprises a machine body, a welding device and a dust removal device as claimed in claim 18, wherein the welding device and the dust removal device are both installed on the machine body.

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