Welding protection device and battery production line

Abstract

The utility model relates to the technical field of welding structures, and provides a welding protection device and a battery production line. The welding protection device comprises a protection structure, and the protection structure is provided with a through protection cavity in the first direction; the protection structure is further provided with a blowing channel, one end of the blowing channel communicates with the protection cavity, and the other end of the blowing channel communicates with the outside and is used for guiding in protection gas. Wherein the number of the air blowing channels is at least two, and the air blowing channels are sequentially arranged at intervals in the first direction; according to the welding protection device provided by the embodiment of the invention, the multiple blowing channels which are sequentially arranged at intervals in the first direction are used for introducing the protection gas into the protection cavity at the same time, so that the concentration uniformity of the protection gas at all positions in the protection cavity can be effectively improved; therefore, the probability that the welding effect is affected due to the fact that the concentration of the protective gas is inconsistent can be effectively reduced, and the welding effect is improved.

Description

Technical Field

[0001] The welding structure of the present application relates to the technical field, and in particular provides a welding protection device and a battery production line. Background Art

[0002] Welding technology is widely used in the fields of machinery, electronics, etc. It is a processing technology that joins metal parts by heating, high temperature or high pressure.

[0003] During the welding process, the welding point needs to be filled with a shielding gas to protect the welding process, and the welding point needs to be vacuumed to reduce the impact of welding slag on the welding operation. However, in the related art, the shielding gas is usually introduced into the welding point through a single air inlet, which leads to inconsistent shielding gas concentrations at various locations of the welding point, thereby affecting the welding effect. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a welding protection device and a battery production line, which aims to solve the problem that the welding effect is affected due to the inconsistent concentration of protective gas at various positions of the welding point.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:

[0006] In a first aspect, an embodiment of the present application provides a welding protection device, comprising a protection structure, wherein the protection structure is provided with a penetrating protection cavity along a first direction; a blowing channel is also provided on the protection structure, one end of the blowing channel is connected to the protection cavity, and the other end of the blowing channel is connected to the outside and is used to introduce a protective gas; wherein the number of the blowing channels is at least two, and each blowing channel is arranged in sequence and spaced apart around the first direction.

[0007] Beneficial effects of the embodiments of the present application: The welding protection device provided in the embodiments of the present application utilizes a protection chamber opened on a protection structure to cover the welding area of ​​a workpiece to be welded, and then at least two blowing channels can be used to introduce a protective gas into the protection chamber to protect the welding process; by simultaneously introducing a plurality of blowing channels arranged in sequence around a first direction into the protection chamber, the protective gas can be effectively improved in terms of the uniformity of the protective gas concentration at various locations in the protection chamber, thereby effectively reducing the probability that the welding effect is affected by inconsistent protective gas concentration, thereby improving the welding effect.

[0008] In some embodiments, a protection station is formed at an opening at one end of the protection cavity, and in any plane perpendicular to the first direction, the axial projection of at least one blowing channel is tangent to the projection of the protection station.

[0009] By adopting the above-mentioned technical solution, the protective gas introduced into at least one blowing channel can be introduced in a direction tangential to the side of the protective station, thereby reducing the probability that the protective gas moves into the protective station and causes welding slag, smoke, etc. to be carried and adhered to the surface of the welding station.

[0010] In some embodiments, one end of at least one blowing channel extends toward the protection cavity in an axial direction to form one end of the protection station.

[0011] By adopting the above-mentioned technical solution, by setting the blowing channel with one end extending in the axial direction toward the protective cavity to form one end of the protective station, the protective gas introduced into the blowing channel can be directly blown to the welding area of ​​the workpiece to be welded, so as to improve the protective effect of the protective gas on the welding process.

[0012] In some embodiments, in any plane parallel to the first direction, a projection of the axial direction of at least one blowing channel forms an angle α with a projection of the first direction, 0°<α<90°.

[0013] By adopting the above technical solution, the angle α between the projection of the axial direction of the blowing channel and the projection of the first direction is limited to between 0° and 90°, so that the shielding gas can be blown in at an angle relative to the workpiece to be welded and protect the welding operation.

[0014] In some embodiments, 30°<α<60°.

[0015] By adopting the above technical solution, the angle α between the projection of the axial direction of the blowing channel and the projection of the first direction is further limited to between 30° and 60°, so that the shielding gas is blown in at an inclination angle of between 30° and 60° relative to the workpiece to be welded and protects the welding operation.

[0016] In some embodiments, the plurality of blowing channels are arranged rotationally symmetrically about the central axis of the protection cavity.

[0017] By adopting the above technical solution, multiple blowing channels introduce protective gas into the protective cavity at the same time, and the blowing channels arranged in rotational symmetry can make the introduced protective gas more evenly distributed in the protective cavity.

[0018] In some embodiments, the welding protection device also includes an air guide structure, and the protection structure is arranged on the air guide structure; a rectifying channel is opened inside the air guide structure, and the rectifying channel is distributed on the surface of the protection structure, and the end of the blowing channel away from the protection cavity is connected to the rectifying channel; an air guide channel is also opened on the air guide structure, one end of the air guide channel is connected to the rectifying channel, and the other end of the air guide channel is connected to the outside and is used to introduce protective gas.

[0019] By adopting the above technical solution, the protective gas can be introduced into the rectifying channel inside the gas guide structure through the gas guide channel so that the protective gas fills the rectifying channel, thereby the protective gas can be introduced into the protective cavity from the multiple blowing channels opened on the protective structure.

[0020] In some embodiments, the air guide structure includes an air guide main body and an air guide connecting part, and the air guide connecting part is arranged on the air guide main body; a rectifying channel is opened inside the air guide main body, and an air guide channel is opened on the air guide connecting part.

[0021] By adopting the above technical solution, the gas guide connection part can be connected to external equipment to introduce protective gas into the rectifying channel in the gas guide main body through the gas guide channel opened on the gas guide connection part.

[0022] In some embodiments, the number of the air guide connection parts is at least two, and the air guide connection parts are arranged on the air guide main body at intervals.

[0023] By adopting the above technical solution, at least two gas guide connecting parts can be used to introduce protective gas into the rectifying channel in the gas guide main body to improve the uniformity of the protective gas in the rectifying channel, thereby improving the uniformity of the gas introduced from the blowing channel into the protective cavity.

[0024] In some embodiments, the welding protection device also includes a dust suction structure, which is connected to the protective structure; the dust suction structure is provided with a through avoidance cavity along the first direction, and one end of the avoidance cavity is connected to the protective cavity; a dust suction cavity is also provided on the dust suction structure, one end of the dust suction cavity is connected to the protective cavity, and the other end of the dust suction cavity is connected to the outside.

[0025] By adopting the above-mentioned technical solution, the dust suction structure can be connected to the external dust suction equipment through the dust suction chamber to form a negative pressure in the dust suction chamber, so that the smoke and other impurities generated by the welding operation in the protective chamber can be adsorbed and discharged from the dust suction chamber to reduce the influence of the smoke and other impurities on the welding operation; at the same time, the avoidance chamber can ensure the normal progress of the welding operation.

[0026] In some embodiments, the dust suction structure includes a dust suction main body and an inner ring part. A cavity is formed inside the dust suction main body. A dust suction port and a dust outlet connected to the cavity are provided on the dust suction main body. The dust suction port is connected to the protective cavity. The inner ring part is arranged in the cavity. The inner ring part is used to separate the cavity into an avoidance cavity and a dust suction cavity. One end of the avoidance cavity is opened toward the dust suction port.

[0027] By adopting the above-mentioned technical solution, the external dust suction equipment can suck the dust suction chamber through the dust outlet and form a negative pressure, so that the dust suction chamber can suck the smoke, welding slag, etc. in the protective chamber through the dust suction port; at the same time, one end of the avoidance chamber faces the dust suction port, so that the external welding equipment can pass through the avoidance chamber and the dust suction port and perform welding operations on the workpiece to be welded covered in the protective chamber.

[0028] In some embodiments, one end of the inner ring portion facing the suction port is tapered.

[0029] By adopting the above technical solution, the dust suction cavity has a larger range at the end facing the dust suction port, thereby achieving a better dust suction effect.

[0030] In some embodiments, the number of dust outlets is at least two.

[0031] By adopting the above technical solution and utilizing at least two dust outlets to perform suction operation on the dust suction chamber, the dust suction efficiency can be effectively improved.

[0032] In some embodiments, the welding protection device further includes a connecting structure and a driving structure, wherein the connecting structure is connected to the protection structure, and the driving structure is drivingly connected to the connecting structure.

[0033] By adopting the above technical solution, the driving structure can drive the connecting structure to move, so that the connecting structure simultaneously drives the protective structure to move to a preset position and protect the welding operation.

[0034] In a second aspect, an embodiment of the present application further provides a battery production line, including welding equipment, the welding equipment including a welding protection device as described above, and a protective structure of the welding protection device is used to cover a workpiece to be welded.

[0035] Beneficial effects of the embodiments of the present application: The battery production line provided by the embodiments of the present application includes the above-mentioned welding protection device. When the welding protection device can make the concentration of the protective gas in the protective chamber more uniform, the welding effect is better and the product quality produced by the battery production line is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 An exploded view of a welding protection device provided in an embodiment of the present application;

[0038] Figure 2 An axial cross-sectional view of a protective structure provided in an embodiment of the present application;

[0039] Figure 3 A top view of the protective structure provided in an embodiment of the present application;

[0040] Figure 4 A schematic diagram of the internal structure of the protective structure provided in an embodiment of the present application, which is assembled on the air guide structure;

[0041] Figure 5 A schematic diagram of the internal structure of the dust collection structure provided in an embodiment of the present application;

[0042] Figure 6 It is a schematic diagram of welding the electrode and the shell when the workpiece to be welded is a battery cell.

[0043] Among them, the reference numerals in the figure are:

[0044] 1000. Welding protection device;

[0045] 100, protective structure; 110, protective cavity; 1101, protective station; 120, blowing channel;

[0046] 200, air guide structure; 201, rectification channel; 202, air guide channel; 210, air guide main body; 220, air guide connection part;

[0047] 300, dust suction structure; 301, avoidance cavity; 302, dust suction cavity; 3011, first cavity; 3012, second cavity; 302, dust suction cavity; 310, dust suction main body; 311, cavity; 312, dust suction port; 313, dust outlet; 320, inner ring;

[0048] 400, connection structure;

[0049] 2000, battery cell; 2100, pole; 2200, shell; 2001, weld;

[0050] M, first direction; N, axial direction. DETAILED DESCRIPTION

[0051] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0052] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] As the market demand for batteries continues to expand, the production and use of battery products are also increasing. During the production and assembly process of batteries, welding operations are required for connection and assembly; for example, the sealing pins or poles of the battery are welded to the shell by laser welding. During the welding process, it is necessary to fill the welding point with protective gas to protect the welding process, and it is also necessary to vacuum the welding point to reduce the impact of welding slag on the welding operation. However, in the related art, the protective gas is usually introduced into the welding point through a single air inlet, which will cause inconsistent concentrations of protective gas at various positions of the welding point, that is, the concentration of protective gas is higher near the air inlet, and the concentration of protective gas is lower away from the air inlet, which will affect the welding effect.

[0056] Based on the above considerations, in order to solve the problem that the welding effect is affected by the inconsistent concentration of shielding gas at various positions of the welding point, a welding protection device is designed. A protection structure with a protection cavity is provided, and at least two blowing channels are provided on the protection structure, and each blowing channel is arranged in sequence around a first direction. At intervals, multiple blowing channels can simultaneously pass shielding gas into the protective cavity, and the shielding gas is introduced from multiple locations of the protective cavity, which effectively improves the uniformity of the concentration of the shielding gas in the protective cavity, thereby effectively reducing the probability of the welding effect being affected by the inconsistent concentration of the shielding gas, thereby improving the welding effect.

[0057] The welding protection device disclosed in the embodiment of the present application can be used to protect the process of welding the pole to the shell during the battery production process, and can also be used to protect the welding process of other components.

[0058] For the convenience of description, the following embodiments are described by taking the welding protection device used in the welding process of a battery production line as an example.

[0059] Next, the welding protection device provided in the embodiment of the present application will be introduced and described.

[0060] Please refer to Figure 1 and Figure 2 The embodiment of the present application provides a welding protection device 1000, including a protection structure 100, wherein the protection structure 100 is provided with a penetrating protection cavity 110 along a first direction M; a blowing channel 120 is also provided on the protection structure 100, one end of the blowing channel 120 is connected to the protection cavity 110, and the other end of the blowing channel 120 is connected to the outside and is used to introduce a protective gas; wherein the number of the blowing channels 120 is at least two, and each blowing channel 120 is arranged in sequence around the first direction M.

[0061] The protective structure 100 is used to cover the workpiece to be welded so that the welding area of ​​the workpiece to be welded can be exposed in the protective cavity 110 opened on the protective structure 100; thus, when the blowing channel 120 introduces protective gas into the protective cavity 110, the welding area of ​​the workpiece to be welded can be within the coverage of the protective gas.

[0062] Optionally, the protective structure 100 includes but is not limited to a block structure, a columnar structure, a plate structure, etc.

[0063] Among them, the first direction M of the protective structure 100 can be a variety of directions such as the thickness direction and axial direction of the protective structure 100; illustratively, the protective structure 100 can adopt a cylindrical block structure, so the first direction M can be the axial direction of the protective structure 100.

[0064] The protective cavity 110 is opened through the protective structure 100, so that one end opening of the protective cavity 110 can be used to accommodate the workpiece to be welded, and the welding area of ​​the workpiece to be welded can be exposed from the other end opening of the protective cavity 110, so that external welding equipment can pass through the protective cavity 110 and perform welding operations on the workpiece to be welded.

[0065] Optionally, the protection cavity 110 may be, but is not limited to, a cavity structure of various configurations such as a columnar cavity, a spherical cavity, or a conical cavity.

[0066] The protective structure 100 is also provided with an air blowing channel 120, which is used to introduce protective gas into the protective cavity 110. One end of the air blowing channel 120 is connected to the protective cavity 110, that is, one end of the air blowing channel 120 is opened on the inner wall of the protective cavity 110; the other end of the air blowing channel 120 is connected to the outside, that is, the other end of the air blowing channel 120 is opened on the outer surface of the protective structure 100, for example, it can be opened on the outer peripheral surface formed by the protective structure 100 around the first direction M.

[0067] The blowing channel 120 can introduce the shielding gas in a direction perpendicular to the first direction M, that is, the axial direction N of the blowing channel 120 is perpendicular to the first direction M; or, the blowing channel 120 can introduce the shielding gas toward the opening at either end of the protection cavity 110, that is, the angle between the axial direction N of the blowing channel 120 and the first direction M is set at an acute angle. Exemplarily, the blowing channel 120 can introduce the shielding gas toward the opening at one end of the protection cavity 110 that is covered with the workpiece to be welded, so that the shielding gas can directly blow the welding area of ​​the workpiece to be welded, so as to improve the protective effect of the shielding gas on the welding operation.

[0068] The protective gas mentioned above includes but is not limited to inert gases such as helium and nitrogen.

[0069] Optionally, the number of the blowing channels 120 may be two, three or any number greater than three, and the plurality of blowing channels 120 may be distributed in sequence at intervals around the first direction M; illustratively, the plurality of blowing channels 120 may be evenly distributed around the first direction M at equal intervals.

[0070] The welding protection device 1000 provided in the embodiment of the present application utilizes the protection cavity 110 opened on the protection structure 100 to cover the welding area of ​​the workpiece to be welded, and then at least two blowing channels 120 can be used to introduce a protective gas into the protection cavity 110 to protect the welding process; a plurality of blowing channels 120 arranged in sequence around the first direction M are used to simultaneously introduce the protective gas into the protection cavity 110, that is, the protective gas is introduced into multiple places in the protection cavity 110 at the same time, which can effectively improve the concentration uniformity of the protective gas at various places in the protection cavity 110, thereby effectively reducing the probability that the welding effect is affected by inconsistent protective gas concentration, thereby improving the welding effect.

[0071] Please refer to Figures 1 to 3 as well as Figure 6 In some embodiments, a protection station 1101 is formed at an opening at one end of the protection cavity 110 , and in any plane perpendicular to the first direction M, a projection of the axial direction N of at least one blowing channel 120 is tangent to the projection of the protection station 1101 .

[0072] Among them, the protection station 1101 refers to a partial area at the opening of one end of the protection cavity 110, and the protection station 1101 is used to accommodate the convex structure of the workpiece to be welded, so that the welding area of ​​the workpiece to be welded can be located outside the protection station 1101; illustratively, taking the workpiece to be welded as a battery cell 2000 as an example, when the pole 2100 of the battery cell 2000 is welded to the shell 2200, the protection structure 100 can abut against the end face of the shell 2200, and the part of the pole 2100 protruding from the end face of the shell 2200 will be in the protection station 1101, and the weld 2001 between the end face of the pole 2100 and the shell 2200 is located outside the protection station 1101, and a ring-shaped weld 2001 is formed between the end face of the pole 2100 and the shell 2200 around the protection station 1101.

[0073] It can be understood that when the blowing channel 120 introduces the protective gas into the protective cavity 110 , the protective gas will be blown out into the protective cavity 110 along the axial direction M of the blowing channel 120 .

[0074] The projection of the axial direction N of at least one blowing channel 120 is tangent to the projection of the protection station 1101, so that the airflow direction of the protective gas introduced into the protection cavity 110 by the blowing channel 120 will flow toward the tangent direction of the side of the protection station 1101; therefore, the probability that the protective gas introduced from the blowing channel 120 directly blows the convex structure accommodated in the protection station 1101 is low, and the probability that the protective gas carries impurities such as welding slag and smoke to contact the convex structure and adhere to the convex structure is also low.

[0075] Optionally, the projection of the axial direction N of one or more blowing channels 120 can be set to be tangent to the projection of the protection station 1101; illustratively, the projection of the axial direction N of each blowing channel 120 can be set to be tangent to the side of the projection of the protection station 1101, and multiple blowing channels 120 respectively introduce protective gas into the tangential direction of the side of the protection station 1101, and the protective gas can form a spiral airflow around the protection station 1101 and protect the annular weld 2001.

[0076] With such a configuration, the protective gas introduced into the blowing channel 120 can be introduced in a direction tangential to the side of the protective station 1101, which can reduce the probability that the protective gas moves into the protective station 1101 and causes welding slag, smoke, etc. to be carried and adhered to the surface of the welding station.

[0077] Please refer to Figure 2 In some embodiments, one end of at least one blowing channel 120 extends along the axial direction N toward the protection cavity 110 to form one end of the protection station 1101 .

[0078] It can be understood that the axial direction N of the blowing channel 120 extends toward the protective cavity 110 to form one end of the protective station 1101. As a result, the protective gas blown out of the blowing channel 120 will flow toward the end of the protective cavity 110 to form the protective station 1101, thereby making the concentration of the welding area of ​​the workpiece to be welded higher.

[0079] Optionally, the axial direction N of one or more of the multiple blowing channels 120 can be set to extend toward the protection cavity 110 to form one end of the protection station 1101; or, the axial direction N of all of the multiple blowing channels 120 can be set to extend toward the protection cavity 110 to form one end of the protection station 1101.

[0080] With such arrangement, the shielding gas introduced by the blowing channel 120 can be directly blown to the welding area of ​​the workpiece to be welded, so that the concentration of the shielding gas in the welding area is higher, so as to improve the protective effect of the shielding gas on the welding process.

[0081] Please refer to Figure 2 and Figure 3 In some embodiments, in any plane parallel to the first direction M, a projection of the axial direction N of at least one blowing channel 120 and a projection of the first direction M form an angle α, 0°<α<90°.

[0082] It can be understood that the projection of the axial direction N of the blowing channel 120 forms an angle with the projection of the first direction M, that is, the protective gas introduced from the blowing channel 120 can be blown obliquely toward the protective cavity 110 to form one end of the protective station 1101 .

[0083] The projection of the axial direction N of one or more blowing channels 120 may be set to form an angle with the projection of the first direction M; or the projection of the axial direction N of all blowing channels 120 may be set to form an angle with the projection of the first direction M.

[0084] The value range of the angle α formed by the projection of the axial direction N of the blowing channel 120 and the projection of the first direction M is between 0° and 90°, that is, the angle α is an acute angle. Optionally, the angle α can be, but is not limited to, any acute angle of 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, etc.

[0085] In some embodiments, the axial direction N of the blowing channel 120 is also tangent to the side of the protective station 1101; thus, when multiple blowing channels 120 simultaneously introduce protective gas into the protective cavity 110, the protective gas can circulate and rotate around the protective station 1101 to further improve the concentration uniformity of the protective gas in various locations in the welding area.

[0086] In this way, the angle α between the projection of the axial direction N of the blowing channel 120 and the projection of the first direction M is limited to between 0° and 90°, so that the shielding gas can be blown in at an angle relative to the workpiece to be welded and protect the welding operation.

[0087] Please refer to Figure 2 and Figure 3 , in some embodiments, 30°<α<60°.

[0088] With this arrangement, the angle α between the projection of the axial direction N of the blowing channel 120 and the projection of the first direction M is further limited to between 30° and 60°, so that the shielding gas can be blown in at an inclination angle of between 30° and 60° relative to the workpiece to be welded and protect the welding operation.

[0089] Please refer to Figure 2 and Figure 3 In some embodiments, the plurality of blowing channels 120 are arranged rotationally symmetrically about the central axis of the protection cavity 110 .

[0090] Illustratively, in this embodiment, the protection cavity 110 may be, but is not limited to, a cavity having a rotationally symmetrical structure such as a cylindrical cavity, a spherical cavity, or a truncated cone cavity; thus, the central axis of the protection cavity 110 is the rotationally symmetrical axis of the protection cavity.

[0091] It can be understood that any one or more of the blowing channels 120 can be rotated around the central axis of the protection cavity 110, so that the position after rotation coincides with the position of one or more of the blowing channels 120. The blowing channel 120 can be rotated around the central axis of the protection cavity 110 by angles such as 90°, 180°, and 270°.

[0092] With such a configuration, multiple blowing channels 120 can be more evenly distributed around the protective cavity 110, so that when multiple blowing channels 120 simultaneously introduce protective gas into the protective cavity 110, the protective gas can also be more evenly introduced into the protective cavity 110 and evenly distributed throughout the welding area of ​​the workpiece to be welded, thereby enabling the protective effect of the protective gas on the welding process to be better.

[0093] Please refer to Figures 1 to 4 In some embodiments, the welding protection device 1000 also includes an air guide structure 200, and the protective structure 100 is arranged on the air guide structure 200; a rectifying channel 201 is opened inside the air guide structure 200, and the rectifying channel 201 is distributed on the surface of the protective structure 100, and the end of the blowing channel 120 away from the protective cavity 110 is connected to the rectifying channel 201; an air guide channel 202 is also opened on the air guide structure 200, one end of the air guide channel 202 is connected to the rectifying channel 201, and the other end of the air guide channel 202 is connected to the outside and is used to introduce protective gas.

[0094] The gas guide structure 200 is used to introduce the protective gas into the internal rectifying channel 201 through the gas guide channel 202 , so that the protective gas can enter the protective cavity 110 through the blowing channel 120 .

[0095] Optionally, the air guide structure 200 includes but is not limited to a block structure, a columnar structure, a spherical structure, a plate structure, etc. The rectifying channel 201 may be an annular groove structure opened on the air guide structure 200. When the protective structure 100 is arranged on the air guide structure 200, the protective structure 100 can be sealed in the annular groove structure, so that the rectifying channel 201 forms a sealed annular channel structure. The cross section of the rectifying channel 201 may be in various shapes such as a rectangle and a circle.

[0096] The gas guide channel 202 is used to introduce external protective gas into the rectifying channel 201; optionally, the number of the gas guide channels 202 can be one, two, or any number more than two.

[0097] The protective structure 100 is arranged on the air-guiding structure 200. For example, the protective structure 100 can be fixedly installed on the air-guiding structure 200 by welding, clamping, fastener connection, screw connection, etc., or a cavity can be opened on the air-guiding structure 200, and the protective structure 100 can be embedded in the cavity of the air-guiding structure 200.

[0098] Exemplarily, in some specific embodiments, a penetrating installation cavity can be opened in the middle of the air-guiding structure 200 along the first direction M, and the inner wall surface of the installation cavity is recessed inward to form an annular groove; the protective structure 100 can be embedded in the installation cavity, and the outer peripheral wall surface of the protective structure 100 abuts against the inner wall surface of the installation cavity; the outer peripheral wall surface of the protective structure 100 is sealed in the annular groove and forms a rectification channel 201, and one end of the blowing channel 120 is connected to the rectification channel 201.

[0099] With such arrangement, the protective gas can be introduced into the rectifying channel 201 inside the air guiding structure 200 through the air guiding channel 202 so that the protective gas fills the rectifying channel 201 , thereby the protective gas can be introduced into the protective cavity 110 from the multiple blowing channels 120 opened on the protective structure 100 .

[0100] Please refer to Figures 2 to 4 In some embodiments, the air guide structure 200 includes an air guide main body 210 and an air guide connecting part 220, and the air guide connecting part 220 is arranged on the air guide main body 210; a rectifying channel 201 is opened inside the air guide main body 210, and an air guide channel 202 is opened on the air guide connecting part 220.

[0101] The air guide body 210 is used to connect with the protective structure 100, and the rectifying channel 201 is opened in the air guide body 210; the air guide body 210 includes but is not limited to air guide rings, air guide blocks, air guide columns, air guide plates and other structures.

[0102] The gas guide connection part 220 is arranged on the gas guide main body 210, and the gas guide connection part 220 is used to connect with external equipment and to introduce protective gas; the gas guide connection part 220 includes but is not limited to gas guide blocks, gas guide rods, gas guide columns and other structures, and the gas guide channel 202 is opened on the gas guide connection part 220.

[0103] Exemplarily, in some specific embodiments, the gas guide main body 210 can be a circular ring structure, and the protective structure 100 is embedded in the gas guide main body 210, so that the rectification channel 201 is arranged around the outer peripheral wall of the protective structure 100; the gas guide connection part 220 can be a columnar structure, and one end of the gas guide connection part 220 is inserted into the gas guide main body 210, and one end of the gas guide channel 202 opened on the gas guide connection part 220 is connected to the rectification channel 201; the other end of the gas guide connection part 220 extends to the outside, so that the extended gas guide connection part 220 can be more conveniently connected to external equipment and introduce protective gas.

[0104] With such configuration, the gas guide connection portion 220 can be connected to an external device to introduce protective gas to the rectifying channel 201 in the gas guide body portion 210 through the gas guide channel 202 provided on the gas guide connection portion 220 .

[0105] Please refer to Figure 3 and Figure 4 In some embodiments, the number of the gas-guiding connection parts 220 is at least two, and each gas-guiding connection part 220 is arranged on the gas-guiding main body part 210 at intervals.

[0106] Optionally, the number of the gas guide connection parts 220 may be two, three, or any number greater than three. For example, taking the number of the gas guide connection parts 220 as two, the two gas guide connection parts 220 can be symmetrically inserted on the outer peripheral wall of the gas guide main body 210, and the protective gas is simultaneously introduced into the rectifying channel 201 through the gas guide channels 202 provided on the two gas guide connection parts 220.

[0107] With such arrangement, at least two gas guide connection parts 220 can be used to introduce protective gas into the rectifying channel 201 in the gas guide main body 210 to improve the uniformity of the protective gas in the rectifying channel 201, thereby improving the uniformity of the gas introduced from the blowing channel 120 into the protective cavity 110.

[0108] Please refer to Figure 1 , Figure 2 and Figure 5 In some embodiments, the welding protection device 1000 further includes a dust suction structure 300, which is connected to the protective structure 100; the dust suction structure 300 is provided with a through avoidance cavity 301 along the first direction M, and one end of the avoidance cavity 301 is connected to the protective cavity 110; a dust suction cavity 302 is also provided on the dust suction structure 300, one end of the dust suction cavity 302 is connected to the protective cavity 110, and the other end of the dust suction cavity 302 is connected to the outside.

[0109] An avoidance chamber 301 and a dust suction chamber 302 are provided on the dust suction structure 300; wherein the avoidance chamber 301 is used to avoid welding operations and to expose the welding area of ​​the workpiece to be welded from the avoidance chamber 301, so that external welding equipment (such as laser welding equipment) can pass through the avoidance chamber 301 for welding operations.

[0110] The dust suction chamber 302 can be connected to an external dust suction device to form a negative pressure in the dust suction chamber 302 , so that the dust suction chamber 302 can suck the smoke, welding slag, etc. generated by the welding operation in the protection chamber 110 and discharge them outward from the dust suction chamber 302 .

[0111] In this way, the dust suction structure 300 can be connected to the external dust suction equipment through the dust suction chamber 302, so that a negative pressure is formed in the dust suction chamber 302, so that the smoke and other impurities generated by the welding operation in the protection chamber 110 can be adsorbed and discharged from the dust suction chamber 302, so as to reduce the influence of the smoke and other impurities on the welding operation; at the same time, the avoidance chamber 301 can ensure the normal progress of the welding operation.

[0112] Please refer to Figure 1 , Figure 4 and Figure 5 In some embodiments, the dust suction structure 300 includes a dust suction body 310 and an inner ring part 320. A cavity 311 is formed inside the dust suction body 310. A dust suction port 312 and a dust outlet 313 connected to the cavity 311 are provided on the dust suction body 310. The dust suction port 312 is connected to the protective cavity 110. The inner ring part 320 is arranged in the cavity 311. The inner ring part 320 is used to separate the cavity 311 into an avoidance cavity 301 and a dust suction cavity 302. One end of the avoidance cavity 301 is opened toward the dust suction port 312.

[0113] A cavity 311 is formed inside the dust collecting body 310 , and a dust collecting port 312 and a dust outlet 313 are provided on the dust collecting body 310 ; thus, the cavity 311 can be connected to the outside through the dust collecting port 312 and the dust outlet 313 .

[0114] The dust collecting body 310 is used to connect with the protective structure 100 or the air guide structure 200, so that the dust collecting port 312 provided on the dust collecting body 310 can be connected with the protective cavity 110 provided on the protective structure 100. The dust collecting body 310 includes but is not limited to structures such as a dust collecting ring, a dust collecting block, a dust collecting column, and a dust collecting plate.

[0115] The inner ring portion 320 is used to be arranged in the cavity 311 and to separate the cavity 311 into a dust suction chamber 302 and an avoidance chamber 301. Optionally, in some specific embodiments, the inner ring portion 320 may be an annular columnar structure, one end of the inner ring portion 320 may be arranged on a side wall of the dust suction main body 310 facing away from the dust suction port 312, and the other end of the inner ring portion 320 may be arranged toward the dust suction port 312, or may extend into the dust suction port 312; thereby, an external welding device may pass through the avoidance chamber 301 to perform welding operations on the workpiece to be welded, and at the same time, the external dust suction device may suck the dust suction chamber 302 through the dust outlet 313 and form a negative pressure.

[0116] With such arrangement, an external dust suction device can suck the dust suction chamber 302 through the dust outlet 313 and form a negative pressure, so that the dust suction chamber 302 can suck the smoke, welding slag, etc. in the protective chamber 110 through the dust outlet 312; at the same time, one end of the avoidance chamber 301 faces the dust outlet 312, so that an external welding device can pass through the avoidance chamber 301 and the dust outlet 312 and perform welding operations on the workpiece to be welded covered in the protective chamber 110.

[0117] Please refer to Figure 4 and Figure 5 In some embodiments, one end of the inner ring portion 320 facing the suction port 312 is tapered.

[0118] It can be understood that the shrinking shape means that the inner diameter of one end of the inner ring portion 320 decreases linearly in the direction toward the dust suction port 312 .

[0119] With such arrangement, the end of the inner ring portion 320 facing the dust suction port 312 is in a tapered shape, and since the thickness of the inner ring portion 320 remains unchanged, it can be considered that the end of the inner ring portion 320 facing the dust suction port 312 is offset inward, thereby, the dust suction port 312 and the dust suction chamber 302 have a larger facing range, a negative pressure environment is formed in the dust suction chamber 302, and the suction effect on the protective chamber 110 through the dust suction port 312 is better.

[0120] Please refer to Figure 4 and Figure 5 In some embodiments, the number of the dust outlets 313 is at least two.

[0121] Optionally, the number of the dust outlets 313 may be two, three, or any number greater than three.

[0122] For example, in some embodiments, the dust collecting body 310 may include a columnar main structure and two columnar protruding structures integrally formed on the main structure, and dust outlets 313 are respectively provided at the ends of the two protruding structures.

[0123] With such arrangement, the dust collection efficiency can be effectively improved by utilizing at least two dust outlets 313 to perform a suction operation on the dust collection chamber 302 .

[0124] Please refer to Figure 1 In some embodiments, the welding protection device 1000 further includes a connecting structure 400 and a driving structure (not shown in the figure), the connecting structure 400 is connected to the protection structure 100, and the driving structure is drivingly connected to the connecting structure 400.

[0125] The connection structure 400 is used to connect the protection structure 100 and the driving structure, so that the driving structure can drive the protection structure 100 to move through the connection structure 400 .

[0126] Optionally, the connection structure 400 includes but is not limited to a connection plate, a connection block, a connection column, a connection rod, a connection bracket, and other structures; the connection structure 400 can be connected to the protective structure 100 by fastener connection, screw connection, clamping connection, welding, etc. It can be understood that when the protective structure 100 is assembled on the air guide structure 200, the connection structure 400 can be connected to the air guide structure 200, so as to achieve the purpose of connecting the connection structure 400 with the connection structure 400.

[0127] The driving structure is connected to the connecting structure 400, and the driving structure can drive the connecting structure 400 to move, such as lifting, translational movement, or reciprocating movement in any direction. Optionally, the driving structure includes but is not limited to driving parts such as a driving cylinder, a driving hydraulic cylinder, and a linear motor.

[0128] With such arrangement, the driving structure can drive the connection structure 400 to move, so that the connection structure 400 simultaneously drives the protection structure 100 to move to a preset position and protect the welding operation.

[0129] Next, taking the workpiece to be welded as a battery cell 2000 as an example, the implementation manner in which the welding protection device 1000 of the embodiment of the present application is specifically used to protect the welding process of the pole 2100 and the shell 2200 of the battery cell 2000 is described.

[0130] Please refer to Figures 1 to 6 In this embodiment, the welding protection device 1000 includes a protection structure 100, an air guide structure 200, a dust suction structure 300, a connection structure 400 and a driving structure; the protection structure 100 is provided with a penetrating protection cavity 110 along the first direction M, and the protection structure 100 is also provided with more than two blowing channels 120, and the multiple blowing channels 120 are rotationally symmetrically arranged about the central axis of the protection cavity 110.

[0131] A protection station 1101 is formed at the opening of one end of the protection cavity 110. When the protection structure 100 is against the end of the shell 2200, the pole 2100 will be located in the protection station 1101, and the annular weld 2001 formed between the pole 2100 and the shell 2200 will be arranged around the protection station 1101.

[0132] In any plane perpendicular to the first direction M, the projection of the axial direction N of each blowing channel 120 is tangent to the side of the projection of the protection station 1101; and, in any plane parallel to the first direction M, the projection of the axial direction N of each blowing channel 120 forms an angle α with the projection of the first direction M, 30°<α<60°.

[0133] The air guide structure 200 includes an air guide main body 210 and an air guide connecting part 220. The air guide main body 210 is a hollow circular ring structure, and the inner wall surface of the hollow circular ring structure is recessed inward to form an annular groove; the protective structure 100 can be embedded in the hollow circular ring structure of the air guide main body 210, and the outer wall surface of the protective structure 100 abuts against the inner wall surface of the hollow circular ring structure; the outer wall surface of the protective structure 100 is sealed in the annular groove and forms a rectifying channel 201, and one end of the blowing channel 120 is connected to the rectifying channel 201. There are two gas-guiding connection parts 220, and the gas-guiding connection parts 220 include two vertically arranged columnar structures. One end of the gas-guiding connection part 220 is inserted into the gas-guiding main body 210, and the other end of the gas-guiding connection part 220 extends to the outside and is used to connect to the equipment providing protective gas; a gas-guiding channel 202 is opened on the gas-guiding connection part 220, one end of the gas-guiding channel 202 is connected to the rectification channel 201, and the other end of the gas-guiding channel 202 is connected to the outside.

[0134] The dust suction structure 300 includes a dust suction body 310 and an inner ring part 320. A cavity 311 is formed inside the dust suction body 310. A dust suction port 312 and a dust outlet 313 are provided on the dust suction body 310. The inner ring part 320 can be an annular columnar structure. One end of the inner ring part 320 can be arranged on a side wall of the dust suction body 310 facing away from the dust suction port 312. The inner ring part 320 can be connected to the outside of the dust suction body 310, and the other end of the inner ring part 320 can be arranged toward the dust suction port 312. Thus, the inner ring part 320 separates the cavity 311 into an avoidance chamber 301 and a dust suction chamber 302.

[0135] The connecting structure 400 can adopt a connecting plate, on which a connecting channel is opened. The dust collection main body 310 abuts against one end of the connecting plate and is fixedly connected to the connecting plate through fasteners, so that the avoidance chamber 301 and the dust collection chamber 302 are both connected to the connecting channel. At the same time, the air guide structure 200 abuts against the other end of the connecting plate and is fixedly connected to the connecting plate through fasteners, so that the protection chamber 110 is connected to the connecting channel.

[0136] The driving structure may adopt a driving cylinder, which is connected to the connecting plate, thereby driving the connecting plate and the dust collecting structure 300, the protective structure 100 and the air guiding structure 200 to move up and down synchronously.

[0137] In this way, the position is adjusted by driving the cylinder so that the protective structure 100 can be placed against the shell 2200, and the weld 2001 formed between the shell 2200 and the pole 2100 is covered in the protective cavity 110, and the protruding part of the pole 2100 is located in the protective station 1101. The protective gas is introduced into the rectifying channel 201 through the air guide channel 202, so that the rectifying channel 201 is filled with protective gas; at the same time, the protective gas enters the protective cavity 110 from the multiple blowing channels 120, and the protective gas is introduced along the tangential direction of the outer peripheral side of the protective station 1101, which can directly blow the welding area for protection, and at the same time reduce the probability that the protective gas is blown to the protruding part of the pole 2100, causing smoke, welding slag, etc. to be carried and adhered to the pole 2100. The external dust suction equipment can perform suction operation on the dust suction chamber through the dust outlet to form a negative pressure in the dust suction chamber and suck the smoke, welding slag, etc. in the protection chamber 110, and can be discharged from the dust suction chamber 302 to reduce the effect of smoke on the laser welding equipment penetrating from the external avoidance chamber 301 and the protection chamber 110 to weld the weld 2001 between the pole 2100 and the shell 2200.

[0138] Please refer to Figure 1 and Figure 2 In the second aspect, an embodiment of the present application further provides a battery production line, including a welding device (not shown in the figure), the welding device includes a welding protection device 1000 as described above, and the protective structure 100 of the welding protection device 1000 is used to cover the workpiece to be welded.

[0139] The battery production line provided in the embodiment of the present application includes the above-mentioned welding protection device 1000. When the welding protection device 1000 can make the concentration of the protective gas in the protective cavity 110 more uniform, the welding effect is better and the quality of the products produced by the battery production line is better.

[0140] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A welding protection device, characterized in that: The protective structure comprises a protective cavity extending through the protective structure in a first direction; the protective structure is also provided with a blowing channel, one end of which is connected to the protective cavity, and the other end of which is connected to the outside and is used to introduce a protective gas; There are at least two blowing channels, and the blowing channels are arranged in sequence and at intervals around the first direction.

2. The welding protection device according to claim 1, characterized in that: A protection station is formed at an opening at one end of the protection cavity, and in any plane perpendicular to the first direction, an axial projection of at least one of the blowing channels is tangent to a projection of the protection station.

3. The welding protection device according to claim 2, characterized in that: One end of at least one of the blowing channels extends toward the protection cavity along the axial direction to form one end of the protection station.

4. The welding protection device according to claim 3, characterized in that: In any plane parallel to the first direction, a projection of at least one of the blowing channels in the axial direction forms an angle α with a projection of the first direction, 0°<α<90°.

5. The welding protection device according to claim 4, characterized in that: 30°＜α＜60°。 6. The welding protection device according to any one of claims 1 to 5, characterized in that: The plurality of blowing channels are arranged rotationally symmetrically about the central axis of the protection cavity.

7. The welding protection device according to any one of claims 1 to 5, characterized in that: The welding protection device also includes an air guide structure, and the protection structure is arranged on the air guide structure; a rectification channel is opened inside the air guide structure, and the rectification channel is distributed on the surface of the protection structure, and the end of the blowing channel away from the protection cavity is connected to the rectification channel; an air guide channel is also opened on the air guide structure, one end of the air guide channel is connected to the rectification channel, and the other end of the air guide channel is connected to the outside and is used to introduce protective gas.

8. The welding protection device according to claim 7, characterized in that: The air guide structure comprises an air guide main body and an air guide connecting part, wherein the air guide connecting part is arranged on the air guide main body; the rectifying channel is opened inside the air guide main body, and the air guide connecting part is opened on the air guide channel.

9. The welding protection device according to claim 8, characterized in that: The number of the air guide connection parts is at least two, and the air guide connection parts are arranged on the air guide main body at intervals.

10. The welding protection device according to any one of claims 1 to 5, 8 and 9, characterized in that: The welding protection device further comprises a dust suction structure, which is connected to the protection structure; the dust suction structure is provided with a through avoidance cavity along the first direction, and one end of the avoidance cavity is connected to the protection cavity; A dust suction cavity is also provided on the dust suction structure, one end of the dust suction cavity is connected to the protection cavity, and the other end of the dust suction cavity is connected to the outside.

11. The welding protection device according to claim 10, characterized in that: The dust suction structure includes a dust suction body and an inner ring part, a cavity is formed inside the dust suction body, a dust suction port and a dust outlet connected to the cavity are provided on the dust suction body, and the dust suction port is connected to the protection cavity; the inner ring part is arranged in the cavity, and the inner ring part is used to separate the cavity into the avoidance cavity and the dust suction cavity; one end of the avoidance cavity opens toward the dust suction port.

12. The welding protection device according to claim 11, characterized in that: One end of the inner ring portion facing the dust suction port is in a constricted shape.

13. The welding protection device according to claim 11 or 12, characterized in that: The number of the dust outlets is at least two.

14. The welding protection device according to any one of claims 1 to 5, 8, 9, 11, and 12, characterized in that: The welding protection device further comprises a connecting structure and a driving structure, wherein the connecting structure is connected to the protection structure, and the driving structure is drivingly connected to the connecting structure.

15. A battery production line, characterized in that: The invention comprises welding equipment, wherein the welding equipment comprises the welding protection device according to any one of claims 1 to 14, wherein the protective structure of the welding protection device is used to cover a workpiece to be welded.

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