WO2025097580A1 - Welding fixture and welding system - Google Patents

Abstract

A welding fixture, comprising a welding pressure plate (1), wherein the welding pressure plate has a first surface (11) and a second surface (12) which are opposite to each other in a first direction, and first hollowed-out areas (13) and first air inlet channels (14) which are communicated with each other; the first air inlet channels allow protective gas to flow in; the first hollowed-out areas extend from the first surface to the second surface; after the first surface is fitted with a part (2) to be welded, the first hollowed-out areas can expose pre-welding positions (21) on said part. Also provided is a welding system comprising the welding fixture. The welding fixture can solve the problem of many welding seam defects of current collecting discs of lithium batteries.

Description

Welding tools and welding systems

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application No. 2023229807278, filed on November 6, 2023, the entire contents of which are incorporated by reference into this application.

Technical Field

The present application relates to the technical field of lithium batteries, and in particular to a welding tool and a welding system.

Background Art

As a secondary battery, lithium batteries have the advantages of high energy density, large capacity, high power and long life, and have been widely used in the automotive, energy storage, consumer electronics and other industries. However, the collector plate in the lithium battery has many weld defects, and the lithium battery made with the collector plate will affect the service life of the lithium battery.

Summary of the invention

The main technical problem solved by the present application is to provide a welding tool and a welding system, in order to solve the problem of many weld defects in the current collecting plate of the lithium battery.

In order to solve the above technical problems, the first technical solution adopted in the present application is: to provide a welding tool, the welding tool may include a welding pressure plate, the welding pressure plate has a first surface and a second surface opposite to each other along a first direction, and a first hollow area and a first air inlet channel connected; the first air inlet channel is used to flow in the protective gas; the first hollow area extends from the first surface to the second surface; after the first surface is matched with the workpiece to be welded, the first hollow area can expose the pre-welding position on the workpiece to be welded.

In this way, after the first surface of the welding plate is matched with the workpiece to be welded, when welding at the pre-welding position, the shielding gas flows from the first air inlet channel into the first hollow area, and the shielding gas in the first hollow area is blown toward the pre-welding position, so that the shielding gas is blown onto the weld. Compared with the related art, the use of this welding tool can reduce human factors, so that the weld defects of the workpiece to be welded are less. In addition, since the first hollow area exposes the pre-welding position, the welding device (such as a laser welding device) described below can be used to directly weld the pre-welding position through the first hollow area.

In some embodiments, the angle between the outlet direction of the first air inlet channel and the first surface is an acute angle, so that the shielding gas flows toward the side of the first hollow area close to the first surface, so that more shielding gas can be blown to the pre-welding position of the workpiece to be welded.

In some embodiments, there are multiple first hollow areas, and the multiple first hollow areas are distributed in a ring array. In this way, when the multiple pre-welding positions on the workpiece to be welded are distributed in a circular array, that is, the central axis of the multiple first hollow areas distributed in a circular array coincides with the central axis of the multiple pre-welding positions distributed in a circular array; the shielding gas can be blown to the multiple pre-welding positions through the multiple first hollow areas, thereby speeding up the welding speed of the pre-welding positions (for example, multiple pre-welding positions can be welded simultaneously, thereby speeding up the welding speed. For another example, when welding multiple pre-welding positions in sequence, there is no need to change the position of the welding tooling, thereby speeding up the welding speed).

In some embodiments, the welding platen further has a first side surface, the first side surface is located between the first surface and the second surface; one end of the first air inlet channel is connected to the first hollow area, and the other end extends to the first side surface. The other end of the first hollow area is convenient for connecting the air supply device described below.

In some embodiments, the welding tool further includes a positioning member, which is disposed on the first surface of the welding platen and is used to cooperate with the positioning structure of the workpiece to be welded. In this way, the positioning member and the positioning structure facilitate the cooperation between the welding tool and the workpiece to be welded, and can also improve the cooperation accuracy.

In some embodiments, the welding tool also includes: a protective gas housing having an installation channel and a second air inlet channel; a welding pressure plate is arranged in the installation channel, and the extension direction of the installation channel is a first direction. There are multiple first hollow areas, and there are multiple first air inlet channels, and the multiple first air inlet channels are connected to the multiple first hollow areas in a one-to-one correspondence; the welding pressure plate and the protective gas housing surround a diversion cavity; the second air inlet channel is connected to the multiple first air inlet channels through the diversion cavity. In this way, the protective gas enters from the second air inlet channel and flows into the diversion cavity. After the diversion of the diversion cavity, the protective gas flows into the multiple first air inlet channels, and the protective gas in each first air inlet channel flows to the corresponding first hollow area. Therefore, one of the following air supply devices can be used to allow the protective gas to flow into multiple first hollow areas at the same time, thereby speeding up the welding speed of the pre-welding position.

In some embodiments, the welding platen further has a first side surface, the first side surface is located between the first surface and the second surface; the welding platen further has a first side surface, the first side surface is located between the first surface and the second surface; the first side surface of the welding platen has a first groove structure, and a plurality of first air inlet channels are connected to the first groove structure; the portion of the mounting channel located at the second air inlet channel covers the notch of the first groove structure to enclose the diversion cavity. The structure is simple, and it is convenient to form the diversion cavity.

In some embodiments, the welding platen has a first negative pressure channel for forming negative pressure; one end of the first negative pressure channel is located on the first surface and is used to adsorb the workpiece to be welded. In this way, when the first negative pressure channel forms negative pressure, the workpiece to be welded can be adsorbed on one side of the first surface or on the first surface, thereby limiting the displacement of the workpiece to be welded relative to the first surface; avoiding the situation where the shielding gas blown out of the first hollow area causes the workpiece to be welded to shift, so that more shielding gas is blown to the pre-welding position. In addition, it is also convenient for the welding device described below to weld more accurately at the pre-welding position.

In some embodiments, the number of the first hollow areas and the number of the first negative pressure channels are both multiple, and the multiple first negative pressure channels are alternately arranged with the multiple first hollow areas. In this way, the multiple first negative pressure channels can be distributed more evenly; after the multiple first negative pressure channels adsorb the parts to be welded, the parts to be welded are more evenly stressed and are not easy to fall off.

In some embodiments, the welding tool further includes a cover plate, which is located on the side of the second surface away from the first surface and is connected to both the protective gas housing and the welding platen; the cover plate has a second hollow area exposing the first hollow area; the cover plate and the welding platen form a second negative pressure channel; the cover plate has an exhaust hole; the first negative pressure channel, the second negative pressure channel and the exhaust hole are connected in sequence. In this way, the exhaust hole is connected to the exhaust device described below, and the exhaust device can extract the gas in the exhaust hole, the second negative pressure channel and the first negative pressure channel, so that the workpiece to be welded is adsorbed on the first surface. The second hollow area is set to expose the first hollow area, thereby preventing the cover plate from blocking the first hollow area.

In some embodiments, the second surface of the welding plate has a second groove structure; the cover plate partially covers the groove opening of the second groove structure to form a second negative pressure channel; the other end of the first negative pressure channel is connected to the second groove structure; the second groove structure has a first opening connected to the exhaust hole. The structure is simple and convenient for forming the second negative pressure channel.

In some embodiments, there are multiple first negative pressure channels and multiple second negative pressure channels, and the multiple first negative pressure channels are connected to the multiple second negative pressure channels in a one-to-one correspondence. The portion of the cover plate located at the exhaust hole and the protective gas shell form a collecting chamber; the exhaust hole is connected to the multiple first openings through the collecting chamber. In this way, when the vacuum device is vacuuming, the gas in the multiple first negative pressure channels flows into the multiple second negative pressure channels respectively, the gas in the multiple second negative pressure channels flows into the collecting chamber, the gas in the collecting chamber flows to the exhaust hole, and the vacuum device extracts the gas in the exhaust hole; thus, a vacuum device can quickly form negative pressure in multiple first negative pressure channels at the same time to adsorb the parts to be welded.

In some embodiments, the surface of the protective gas housing near the cover plate has a third groove structure, and the portion of the cover plate located at the exhaust hole covers the groove of the third groove structure to form a collection cavity; the third groove structure has a plurality of second openings, and the plurality of first openings are directly opposite to and connected with the plurality of second openings. The structure is simple, and it is convenient to form a collection cavity.

In some embodiments, the welding tool further includes an adsorption structure, which has an adsorption channel connected to the first negative pressure channel and is disposed in the first negative pressure channel; the adsorption structure is used to adsorb the workpiece to be welded. In this way, when the negative pressure is applied, the adsorption structure can adsorb the workpiece to be welded, reducing air leakage between the workpiece to be welded and the first negative pressure channel. In addition, the flatness of the workpiece to be welded is not required to be high.

In some embodiments, the first negative pressure channel includes a first connecting channel and a second connecting channel that are connected; a step surface is formed between the first connecting channel and the second connecting channel, and the second connecting channel extends to the first surface; the adsorption structure is an annular structure, the adsorption structure is inserted into the second connecting channel, and contacts the step surface. In this way, the first connecting channel is connected to the adsorption structure of the annular structure. When the pressure is negative, the step surface can prevent the adsorption structure from moving in the first negative pressure channel, so that the adsorption structure is installed in the first negative pressure channel.

In order to solve the above technical problems, the second technical solution provided by the present application is: to provide a welding system, the welding system includes the above welding tool, the gas supply device and the welding device, the gas supply device is connected to the first air inlet channel and is configured to provide protective gas. The welding device is configured to weld the pre-welding position on the workpiece to be welded through the first hollow area. The welding system includes the effect of the above welding work.

In some embodiments, when the welding tool includes a first negative pressure channel, the welding system further includes a gas extraction device connected to the first negative pressure channel and used to extract the gas in the first negative pressure channel. The gas device can form a negative pressure in the first negative pressure channel.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments 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 any creative work.

FIG1 is a structural diagram of a welding tool provided by the present application;

FIG2 is a structural diagram of the welding tool provided by the present application and the workpiece to be welded;

FIG3 is a structural diagram of another welding tool provided by the present application;

FIG4 is an exploded view of another welding tool provided by the present application;

FIG5 is a structural diagram of a welding pressure plate provided in the present application;

FIG6 is a bottom view of the welding plate in FIG4;

Fig. 7 is a cross-sectional view along line A-A in Fig. 6;

FIG. 8 is a structural diagram of a welding system provided in the present application.

In the figure: 1. welding pressure plate; 11. first surface; 12. second surface; 13. first hollow area; 14. first air inlet channel; 15. first groove structure; 16. first side surface; 17. second groove structure; 171. first opening; 18. first negative pressure channel; 181. first connecting channel; 182. second connecting channel; 2. parts to be welded; 21. pre-welding position; 3. protective gas shell; 31. third groove structure; 32. second opening; 33. installation channel; 34. second air inlet channel; 4. cover plate; 41. exhaust hole; 42. second hollow area; 5. adsorption structure; 6. positioning member; 1000. welding tooling; 2000. air supply device; 3000. exhaust device; 4000. welding device; 5000. dust removal device.

DETAILED DESCRIPTION

The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

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

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the related art, when welding the collector plate of lithium batteries (such as square batteries, cylindrical batteries and soft-pack batteries, etc.), the shielding gas is blown to the weld through the gas pipe, so that the weld has fewer defects. However, the gas pipe needs to be held by the staff, and the staff may hold the gas pipe at an angle, so that the shielding gas in the gas pipe cannot be blown to the weld, resulting in more defects in the weld; then the lithium battery made with the collector plate will affect the service life of the lithium battery.

In order to solve the problem of many weld defects in the collector plate of the lithium battery, an embodiment of the present application provides a welding tool. Referring to Figures 1 to 7, the welding tool may include a welding plate 1, which has a first surface 11 and a second surface 12 opposite to each other along a first direction, and a first hollow area 13 and a first air inlet channel 14 connected. The first air inlet channel 14 is used to flow in the protective gas; the first hollow area 13 extends from the first surface 11 to the second surface 12; after the first surface 11 is matched with the part to be welded 2, the first hollow area 13 can expose the pre-welding position 21 on the part to be welded 2. In this way, after the first surface 11 of the welding plate 1 is matched with the part to be welded 2, when welding at the pre-welding position 21, the protective gas flows from the first air inlet channel 14 into the first hollow area 13, and the protective gas in the first hollow area 13 will blow to the pre-welding position 21, so that the protective gas is blown onto the weld. Compared with the related art, the use of the welding tool can reduce human factors, so that the weld defects of the part to be welded 2 are less. In addition, since the first hollow area 13 exposes the pre-welding position 21 , the pre-welding position 21 can be directly welded through the first hollow area 13 by using a welding device (eg, a laser welding device) described below.

The shape of the welding platen 1 can be a flat structure, for example, the flat structure can be a cuboid, a cube, a cylinder, etc. In this article, the shape of the welding platen 1 is described as a cylinder.

Referring to FIG. 1 , the welding platen 1 has a first surface 11 and a second surface 12 that are opposite to each other along a first direction. It can be understood that the first surface 11 and the second surface 12 are arranged along the first direction. Exemplarily, the welding platen 1 also has a first side surface 16, and the first side surface 16 is located between the first surface 11 and the second surface 12. For example, the first side surface 16 is in contact with and connected to both the first surface 11 and the second surface 12; when the shape of the welding platen 1 is a cylinder, the first direction is the axial direction of the cylinder, and the first surface 11 and the second surface 12 are the upper surfaces of the cylinder, respectively. and the lower surface, the first side surface 16 is the outer surface of the cylinder. For another example, the first side surface 16 is connected to the first surface 11 and the second surface 12 through other surfaces.

Continuing to refer to FIG. 1 , the welding plate 1 has a first hollow area 13 and a first air inlet channel 14 that are connected. The shape of the pre-welding position 21 on the workpiece 2 to be welded is related to the shape of the first hollow area 13. For example, when the shape of the pre-welding position 21 is circular, the shape of the corresponding first hollow area 13 can be a hole, and the first hollow area 13 can be called a first through hole. For another example, when the shape of the pre-welding position 21 is rectangular, the shape of the corresponding first hollow area 13 can be a groove, and the first hollow area 13 can be called a first through groove.

The first air inlet channel 14 is used to transmit the shielding gas to the first hollow area 13, so that the shielding gas output by the gas supply device is transmitted to the first hollow area 13 through the first air inlet channel 14. One end of the first air inlet channel 14 is connected to the first hollow area 13; the other end of the first air inlet channel 14 can be located on at least one of the first surface 11, the second surface 12 and the first side surface 16 of the welding plate 1. The following description takes the example that the other end of the first air inlet channel 14 can be located on the first side surface 16.

The shielding gas may be a gas that does not react between the workpiece 2 to be welded and the solder during welding. For example, the shielding gas may be an inert gas (such as helium).

1 , the first hollow area 13 extends from the first surface 11 to the second surface 12; for example, the first hollow area 13 extends from the upper surface of the cylinder to the lower surface of the cylinder. At this time, the extension direction of the first hollow area 13 (for example, the axial direction of the first through hole) is parallel to the axial direction of the cylinder.

Referring to FIG. 2 , after the first surface 11 is matched with the workpiece 2 to be welded, it can be understood that the welding plate 1 is detachably connected to the workpiece 2 to be welded, and the first surface 11 is closer to the workpiece 2 to be welded than the second surface 12. The first hollow area 13 can expose the pre-welding position 21 on the workpiece 2 to be welded, and the pre-welding position 21 on the workpiece 2 to be welded can be seen through the first hollow area 13. In some examples, the first hollow area 13 is directly opposite to the pre-welding position 21 on the workpiece 2 to be welded. For example, the orthographic projection of the first hollow area 13 on the workpiece 2 to be welded covers the pre-welding position 21 on the workpiece 2 to be welded. For another example, the orthographic projection of the first hollow area 13 on the workpiece 2 to be welded coincides with the pre-welding position 21 on the workpiece 2 to be welded.

2 , the part to be welded 2 may be a structure that needs to be welded, for example, the structure may be a current collector (also referred to as a current collector) of a battery (such as a lithium battery), a battery pole piece, a battery housing, etc. The pre-welding position 21 on the part to be welded 2 may be understood as a position on the part to be welded 2 that needs to be welded.

In some embodiments, the angle between the outlet direction of the first air inlet channel 14 and the first surface 11 is an acute angle. In this way, the shielding gas flows toward the side of the first hollow area 13 close to the first surface 11, so that more shielding gas can be blown to the pre-welding position 21 of the workpiece 2 to be welded.

The gas outlet direction of the first air inlet channel 14 can be understood as the direction of the protective gas coming out of the end of the first air inlet channel 14 that is connected to the first hollow area 13. For example, when the first air inlet channel 14 is the inner wall of a linear structure (such as a straight tube), the gas outlet direction can be the axial direction of the tubular structure. For another example, when the first air inlet channel 14 is a curved structure (such as a curved tube), the gas outlet direction can be the tangent direction of one end of the curved structure. Line direction.

In some embodiments, referring to FIG. 1 , the number of the first hollow areas 13 is multiple (for example, 2, 3, 5, 6, 8, 10, etc.), and the multiple first hollow areas 13 are distributed in a circular array. In this way, when the multiple pre-welding positions 21 on the workpiece 2 to be welded are also distributed in a circular array, that is, the central axis of the multiple first hollow areas 13 distributed in a circular array coincides with the central axis of the multiple pre-welding positions 21 distributed in a circular array; so that the shielding gas can be blown to the multiple pre-welding positions 21 through the multiple first hollow areas 13, and the welding speed of the pre-welding positions 21 can be accelerated (for example, multiple pre-welding positions 21 can be welded simultaneously, thereby accelerating the welding speed. For another example, when welding multiple pre-welding positions 21 in sequence, there is no need to change the position of the welding tooling, thereby accelerating the welding speed).

Exemplarily, when there are multiple first hollow areas 13 (e.g., 2, 3, 5, 6, 8, 10, etc.), there are also multiple first air inlet channels 14 (e.g., 2, 3, 5, 6, 8, 10, etc.). One of the following air supply devices may be connected to multiple first air inlet channels 14, so that the protective gas provided by one of the following air supply devices may flow into multiple first hollow areas 13 through multiple first air inlet channels 14, respectively.

As another example, when there are multiple first hollow areas 13, there are also multiple corresponding first air inlet channels 14. It is also possible to use multiple (e.g., 2, 3, 5, 6, 8, 10, etc.) air supply devices in the following text to communicate with multiple first hollow areas 13 through multiple first air inlet channels 14, so that the protective gas provided by one air supply device in the following text can flow into one first hollow area 13 through one first air inlet channel 14.

In some embodiments, there are multiple first hollow areas 13, and the multiple first hollow areas 13 are distributed in other ways (e.g., distributed in a rectangular array). In this way, when the multiple pre-welding positions 21 on the workpiece 2 to be welded are distributed in other ways (e.g., distributed in a rectangular array), the multiple first hollow areas 13 can blow the multiple pre-welding positions 21, thereby accelerating the welding speed of the pre-welding positions 21.

In some embodiments, when the number of first hollow areas 13 is one and the number of pre-welding positions 21 on the workpiece 2 to be welded is multiple, the one first hollow area 13 can be used to align with the multiple pre-welding positions 21 in sequence; thus, the one first hollow area 13 can be used to blow protective gas to the multiple pre-welding positions 21 on the workpiece 2 to be welded in sequence.

In some embodiments, referring to FIG. 1 , the welding plate 1 further has a first side surface 16, which is located between the first surface 11 and the second surface 12; one end of the first air inlet channel 14 is connected to the first hollow area 13, and the other end extends to the first side surface 16. This allows the other end of the first hollow area 13 to be easily connected to the air supply device described below.

In some embodiments, referring to FIG. 5 , the welding tool further includes a positioning member 6, which is disposed on the first surface 11 of the welding plate 1 and is used to cooperate with the positioning structure of the workpiece 2 to be welded. In this way, the positioning member 6 and the positioning structure facilitate the cooperation between the welding tool and the workpiece 2 to be welded, and can also improve the cooperation accuracy. For example, the positioning member 6 is a plug-in rod, and the positioning mechanism can be a plug-in slot, a plug-in hole, etc. The end of the positioning member 6 is rounded, which can be To reduce the damage of the positioning member 6 to the welded member 2. The positioning member 6 can be fixedly arranged (for example, welded) on the first surface 11. The positioning member 6 can be detachably arranged (for example, threaded) on the first surface 11. The positioning member 6 can be arranged in the middle of the first surface 11 (for example, at the midpoint of the circular first surface 11).

In some embodiments, referring to FIG. 3 and FIG. 4 , the welding tool further includes a shielding gas housing 3, the shielding gas housing 3 has a mounting channel 33 and a second air inlet channel 34; the welding plate 1 is arranged in the mounting channel 33, and the extending direction of the mounting channel 33 is a first direction. There are multiple first hollow areas 13, and there are multiple first air inlet channels 14, and the multiple first air inlet channels 14 are connected to the multiple first hollow areas 13 in a one-to-one correspondence; the welding plate 1 and the shielding gas housing 3 enclose a diversion cavity; the second air inlet channel 34 is connected to the multiple first air inlet channels 14 through the diversion cavity. In this way, the shielding gas enters from the second air inlet channel 34 and flows into the diversion cavity. After the diversion of the diversion cavity, the shielding gas flows into the multiple first air inlet channels 14, and the shielding gas in each first air inlet channel 14 flows into the corresponding first hollow area 13. Therefore, a gas supply device described below can be used to allow shielding gas to flow into multiple first hollow areas 13 at the same time, thereby accelerating the welding speed of the pre-welding position 21.

The welding platen 1 is disposed in the mounting channel 33, for example, the welding platen 1 is fixedly connected (for example, welded) or detachably connected in the mounting channel 33. The shape of the mounting channel 33 is designed according to the shape of the welding platen 1; for example, when the shape of the welding platen 1 is cylindrical, the shape of the mounting channel 33 is a circular channel; for another example, when the shape of the welding platen 1 is a cuboid, the shape of the mounting channel 33 is a rectangular channel. The extending direction of the mounting channel 33 is a first direction; for example, the center line of the circular channel or the rectangular channel is the first direction.

One end of the second air inlet channel 34 is connected to the diversion cavity, and the other end is located on the outer side, upper surface or lower surface of the protective gas housing 3. The following description takes the other end of the second air inlet channel 34 being located on the outer side of the protective gas housing 3 as an example.

For example, in order to increase the amount of shielding gas flowing into the diversion cavity, the number of second gas inlet channels 34 may be increased, so that the shielding gas blown from the first hollow area 13 to the pre-welding position 21 meets the demand.

The welding platen 1 and the protective gas housing 3 enclose a diversion chamber; it can be understood that the diversion chamber is composed of the welding platen 1 and the protective gas housing 3. In some examples, the diversion chamber can be set on the welding platen 1. In other examples, the diversion chamber can be set on the protective gas housing 3.

In some embodiments, referring to FIG. 3 and FIG. 4 , the welding platen 1 further has a first side surface 16, which is located between the first surface 11 and the second surface 12; the first side surface 16 of the welding platen 1 has a first groove structure 15, and a plurality of first air inlet channels 14 are connected to the first groove structure 15; the portion of the mounting channel 33 located at the second air inlet channel 34 covers the notch of the first groove structure 15 to enclose a diversion cavity. In this way, the structure is simple and it is easy to form a diversion cavity.

The shape of the first groove structure 15 is related to the shape of the welding platen 1. The shape of the first groove structure 15 can be an annular groove. For example, when the shape of the welding platen 1 is cylindrical, the shape of the first groove structure 15 is an annular circular groove; for another example, when the shape of the welding platen 1 is a cuboid, the shape of the first groove structure 15 is an annular rectangular groove.

The portion of the installation channel 33 located in the second air inlet channel 34 can be understood as the portion of the installation channel 33 that is adjacent to the second air inlet channel 34. The portion connected to one end of the air inlet channel 34. In this way, while the portion covers the first groove structure 15 to enclose the diversion cavity, it also enables one end of the second air inlet channel 34 to be connected to the diversion cavity.

In some embodiments, the mounting channel 33 has a first groove structure; the first side surface 16 located at the first air inlet channel 14 partially covers the first groove structure of the mounting channel 33 to form a diversion cavity; the second air inlet channel 34 is connected to the first groove structure of the mounting channel 33.

In some embodiments, the first side surface 16 of the welding platen 1 has a first groove structure 15, and the mounting channel 33 also has a first groove structure; the first groove structure 15 of the welding platen 1 and the first groove structure of the mounting channel 33 form a diversion cavity relative to each other; multiple first air inlet channels 14 are connected to the first groove structure 15 of the welding platen 1; and the second air inlet channel 34 is connected to the first groove structure of the mounting channel 33.

In some embodiments, referring to FIGS. 3 to 7 , the welding platen 1 has a first negative pressure channel 18 for forming negative pressure; one end of the first negative pressure channel 18 is located on the first surface 11 and is used to adsorb the workpiece 2 to be welded. In this way, when the first negative pressure channel 18 forms negative pressure, the workpiece 2 to be welded can be adsorbed on one side of the first surface 11 or on the first surface 11, thereby limiting the displacement of the workpiece 2 to be welded relative to the first surface 11; and avoiding the situation where the shielding gas blown out of the first hollow area 13 causes the workpiece 2 to be welded to be displaced, so that more shielding gas is blown to the pre-welding position 21. In addition, it is also convenient for the welding device described below to weld more accurately at the pre-welding position 21.

The first negative pressure channel 18 may be connected to the exhaust device described below, and the exhaust device may form a negative pressure in the first negative pressure channel 18. One end of the first negative pressure channel 18 is brought into contact with the workpiece 2 to be welded, and the exhaust device exhausts the first negative pressure channel 18, so that the chamber formed by the first negative pressure channel 18, the workpiece 2 to be welded, and the exhaust device is in a negative pressure state, so that the workpiece 2 to be welded is adsorbed on the first surface 11 or on one side of the first surface 11. The other end of the first negative pressure channel 18 may be located on the second surface 12; or on the first side surface 16.

In some embodiments, referring to Fig. 3 to Fig. 6, the number of the first hollow areas 13 and the number of the first negative pressure channels 18 are both multiple (for example, 2, 3, 5, 6, 8, 10, etc.), and the multiple first negative pressure channels 18 are alternately arranged with the multiple first hollow areas 13. In this way, the multiple first negative pressure channels 18 can be distributed more evenly, and after the multiple first negative pressure channels 18 adsorb the workpiece 2 to be welded, the workpiece 2 to be welded is more evenly stressed and is not easy to fall off.

The plurality of first negative pressure channels 18 are arranged alternately with the plurality of first hollow areas 13. It can be understood that one first negative pressure channel 18 is located between two adjacent first hollow areas 13, and one first hollow area 13 is located between two adjacent second negative pressure channels.

For example, multiple first hollow areas 13 are distributed in a circular array, and correspondingly multiple first negative pressure channels 18 are also distributed in a circular array, and the central axes of the two circular arrays coincide; a first negative pressure channel 18 is located between two adjacent first hollow areas 13, and a first hollow area 13 is located between two adjacent second negative pressure channels.

Exemplarily, the plurality of first negative pressure channels 18 may be connected to one of the following air extraction devices, or may be connected to a plurality of air extraction devices in a one-to-one correspondence.

In some embodiments, referring to Fig. 3 and Fig. 4, the welding tool further comprises a cover plate 4, which is located on the side of the second surface 12 away from the first surface 11 and is connected to both the protective gas housing 3 and the welding plate 1; the cover plate 4 has a second hollow area 42 exposing the first hollow area 13; the cover plate 4 and the welding plate 1 form a second negative pressure channel; the cover plate 4 has an exhaust hole 41; the first negative pressure channel 18, the second negative pressure channel and the exhaust hole 41 are connected in sequence. In this way, the exhaust hole 41 is connected to the exhaust device described below, and the exhaust device can extract the gas in the exhaust hole 41, the second negative pressure channel and the first negative pressure channel 18, so that the workpiece to be welded is adsorbed on the first surface 11. The second hollow area 42 is set to expose the first hollow area 13, so as to prevent the cover plate 4 from blocking the first hollow area 13.

The cover plate 4 is located on the side of the second surface 12 away from the first surface 11 and is connected to both the protective gas housing 3 and the welding platen 1 , so that the cover plate 4 covers the second surface 12 and the upper surface of the protective gas housing 3 as shown in FIG. 4 .

The shape of the second hollow area 42 may be the same as that of the first hollow area 13, that is, the orthographic projections of the two on the plane where the first surface 11 is located coincide with each other. The shape of the second hollow area 42 may be different from that of the first hollow area 13, that is, the orthographic projection of the second hollow area 42 on the plane where the first surface 11 is located covers the orthographic projection of the first hollow area 13 on the plane where the first surface 11 is located.

In some embodiments, referring to FIG. 4 , the second surface 12 of the welding plate 1 has a second groove structure 17; the groove of the cover plate 4 partially covers the second groove structure 17 to form a second negative pressure channel; the other end of the first negative pressure channel 18 is connected to the second groove structure 17; the second groove structure 17 has a first opening 171, which is connected to the exhaust hole 41. In this way, the structure is simple and it is easy to form the second negative pressure channel.

The second groove structure 17 may be in the shape of a strip groove, a circular groove, etc. The other end of the first negative pressure channel 18 is connected to the second groove structure 17 ; for example, the other end of the first negative pressure channel 18 is connected to the groove bottom wall of the second groove structure 17 .

In some embodiments, a second groove structure 17 is provided on the second surface 12 of the welding platen 1; the cover plate 4 also has a second groove structure near the welding platen 1; the notch of the second groove structure of the cover plate 4 is opposite to and connected with the notch of the second groove structure 17 of the welding platen 1 to form a second negative pressure channel; the other end of the first negative pressure channel 18 is connected with the second groove structure 17 of the welding platen 1; the second groove structure 17 of the welding platen 1 has a first opening 171, and the first opening 171 is connected with the exhaust hole 41.

In some embodiments, there are multiple first negative pressure channels 18 and multiple second negative pressure channels (for example, 2, 3, 5, 6, 8, 10, etc.), and multiple first negative pressure channels 18 are connected to multiple second negative pressure channels in a one-to-one correspondence. The portion of the cover plate 4 located at the exhaust hole 41 and the protective gas shell 3 form a collecting chamber; the exhaust hole 41 is connected to the multiple first openings through the collecting chamber. In this way, when the vacuum device is vacuuming, the gas in the multiple first negative pressure channels 18 flows into the multiple second negative pressure channels respectively, the gas in the multiple second negative pressure channels flows into the collecting chamber, the gas in the collecting chamber flows to the exhaust hole 41, and the vacuum device extracts the gas in the exhaust hole 41; thus, a vacuum device can quickly form negative pressure in multiple first negative pressure channels 18 at the same time to adsorb the welded parts 2.

In some embodiments, referring to FIG. 4 , the surface of the protective gas housing 3 close to the cover plate 4 (for example, the upper surface as shown in FIG. 4 ) has a third groove structure 31, and the portion of the cover plate 4 located at the exhaust hole 41 covers the third groove structure. The slots of the third slot structure 31 form a collection cavity; the third slot structure 31 has a plurality of second openings 32, and the plurality of first openings 171 are opposite to and connected with the plurality of second openings 32 (for example, the first openings 171 extend to the first side surface 16, and the second openings 32 extend to the channel wall of the installation channel 33; so that the first openings 171 are opposite to and connected with the second openings 32). In this way, the structure is simple and it is easy to form a collection cavity.

The shape of the third groove structure 31 is related to the shape of the installation channel 33; for example, the third groove structure 31 can be an annular groove such as an annular circular groove, an annular rectangular groove, etc.

In some embodiments, the surface of the cover plate 4 close to the welding plate 1 has a third groove structure, and the surface of the protective gas housing 3 close to the cover plate 4 covers the groove of the third groove structure to form a collection chamber; the third groove structure has a plurality of second openings, and the plurality of first openings are directly opposite to and connected with the plurality of second openings 32 (for example, the first opening extends to the first surface 11, and each second opening 32 can extend to the surface of the cover plate 4 close to the welding plate 1, so that the first opening is directly opposite to and connected with the second opening 32). The exhaust hole 41 is connected with the third groove structure 31.

In some embodiments, the surface of the protective gas housing 3 close to the cover plate 4 has a third groove structure 31, and the surface of the cover plate 4 close to the welding plate 1 also has a third groove structure, and the third groove structure 31 of the protective gas housing 3 and the third groove structure of the cover plate 4 are opposite to each other to form a collection cavity. The third groove structure 31 of the protective gas housing 3 has a plurality of second openings 32, and the plurality of first openings are opposite to and connected with the plurality of second openings 32 (for example, the first openings extend to the first side surface 16, and the second openings 32 extend to the channel wall of the installation channel 33, so that the first openings are opposite to and connected with the second openings 32).

In some embodiments, referring to FIG. 4 , the welding tool further includes an adsorption structure 5, which has an adsorption channel connected to the first negative pressure channel 18, and is disposed in the first negative pressure channel 18; the adsorption structure 5 is used to adsorb the workpiece 2 to be welded. In this way, when the negative pressure is applied, the adsorption structure 5 can adsorb the workpiece 2 to be welded, thereby reducing air leakage between the workpiece 2 to be welded and the first negative pressure channel 18. In addition, the flatness of the workpiece 2 to be welded is not required to be high.

The material of the adsorption structure 5 can be a flexible material, and the flexible material can be rubber, silicone, etc. The adsorption structure 5 can be an annular structure (such as an annular sealing ring), a trumpet-shaped structure (such as a suction cup), etc. Part of the adsorption structure 5 is located in the first negative pressure channel 18, and the other part is located outside the first negative pressure channel 18. The adsorption structure 5 located outside the first negative pressure channel 18 can better adsorb the workpiece 2 to be welded.

In some embodiments, referring to FIG. 6 and FIG. 7 , the first negative pressure channel 18 includes a first connecting channel 181 and a second connecting channel 182 that are connected; a step surface is formed between the first connecting channel 181 and the second connecting channel 182, and the second connecting channel 182 extends to the first surface 11; the adsorption structure 5 is an annular structure, and the adsorption structure 5 is inserted into the second connecting channel 182 and contacts the step surface. In this way, the first connecting channel 181 is connected to the adsorption structure 5 of the annular structure. When the negative pressure is applied, the step surface can prevent the adsorption structure 5 from moving in the first negative pressure channel 18, thereby installing the adsorption structure 5 in the first negative pressure channel 18.

In some embodiments, the welding platen 1 is sealed to the protective gas housing 3; for example, the welding platen 1 is welded to the protective gas housing 3; or for another example, a sealing ring is provided between the welding platen 1 and the protective gas housing 3. In the embodiment, the welding plate 1 is sealed and connected to the cover plate 4; for example, the welding plate 1 is welded to the cover plate 4; for example, a sealing ring is provided between the welding plate 1 and the cover plate 4. In some embodiments, the protective gas housing 3 is sealed and connected to the cover plate 4; for example, the protective gas housing 3 is welded to the cover plate 4; for example, a sealing ring is provided between the protective gas housing 3 and the cover plate 4.

The embodiment of the present application provides a welding system. Referring to FIG8 , the welding system includes a welding tool 1000, a gas supply device 2000 and a welding device 4000. The gas supply device 2000 is connected to the first gas inlet channel and is configured to provide a shielding gas. The welding device 4000 is configured to weld the pre-welding position on the workpiece to be welded through the first hollow area.

The welding tool 1000 at least includes a welding platen 1, and may also include a protective gas housing 3 and a cover plate 4. The embodiment of the present application is described by taking the welding tool 1000 at least including a welding platen, a protective gas housing 3 and a cover plate 4 as an example.

The gas supply device 2000 may be a tank filled with protective gas; the gas supply device 2000 may also be a delivery pipeline capable of generating protective gas. The welding device 4000 may be a laser welding device or the like.

Exemplarily, the welding system further includes a dust removal device 5000. The dust removal device 5000 is configured to absorb impurities. For example, the impurities may be shielding gas coming out of the second surface of the first hollow area, gas generated during welding, etc. The dust removal device may be an exhaust fan, etc.

Exemplarily, the welding system further comprises a mounting frame, on which the welding tool 1000, the gas supply device 2000 and the welding device 4000 are all mounted, and the workpiece to be welded can be placed on a workbench of the mounting frame. In order to facilitate the movement of the welding tool 1000, the welding tool 1000 is mounted on the mounting frame via a lifting mechanism and a translation mechanism.

In some embodiments, when the welding tool 1000 includes a first negative pressure channel, the welding system further includes an exhaust device 3000, which is connected to the first negative pressure channel and is used to extract the gas in the first negative pressure channel. In this way, the exhaust device 3000 can form a negative pressure in the first negative pressure channel. The exhaust device 3000 can be an exhaust fan. Exemplarily, the exhaust device 3000 is also used to absorb impurities.

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

Claims (17)

A welding tool, characterized by comprising: A welding plate comprises a first surface and a second surface opposite to each other along a first direction, and a first hollow area and a first air inlet channel connected to each other; the first air inlet channel is used for the flow of protective gas; the first hollow area extends from the first surface to the second surface; after the first surface is matched with the workpiece to be welded, the first hollow area can expose the pre-welding position on the workpiece to be welded. The welding tool according to claim 1 is characterized in that: An angle between an outlet direction of the first air inlet channel and the first surface is an acute angle. The welding tool according to claim 1 or 2, characterized in that: There are multiple first hollow areas, and the multiple first hollow areas are distributed in a ring array. The welding tool according to any one of claims 1 to 3, characterized in that: The welding platen also has a first side surface, and the first side surface is located between the first surface and the second surface; one end of the first air inlet channel is connected to the first hollow area, and the other end extends to the first side surface. The welding tool according to any one of claims 1 to 4, characterized in that: The welding tool also includes a positioning piece, which is arranged on the first surface of the welding pressure plate and is used to cooperate with the positioning structure of the workpiece to be welded. The welding tool according to any one of claims 1 to 5, characterized in that the welding tool further comprises: a protective gas housing having a mounting channel and a second air inlet channel; the welding pressure plate is arranged in the mounting channel, and the extending direction of the mounting channel is the first direction; There are multiple first hollow areas, there are multiple first air inlet channels, and the multiple first air inlet channels are connected to the multiple first hollow areas in a one-to-one correspondence; the welding pressure plate and the protective gas shell surround a diversion cavity; the second air inlet channel is connected to the multiple first air inlet channels through the diversion cavity. The welding tool according to claim 6 is characterized in that: The welding platen also has a first side surface, which is located between the first surface and the second surface; the first side surface of the welding platen has a first groove structure, and multiple first air inlet channels are connected to the first groove structure; the part of the installation channel located at the second air inlet channel covers the groove of the first groove structure to enclose the diversion cavity. The welding tool according to claim 6 or 7 is characterized in that: The welding platen has a first negative pressure channel for forming negative pressure; one end of the first negative pressure channel is located on the first surface and is used for adsorbing the workpiece to be welded. The welding tool according to claim 8 is characterized in that: The number of the first hollow areas and the number of the first negative pressure channels are both multiple, and the multiple first negative pressure channels and the multiple first hollow areas are alternately arranged. The welding tool according to claim 8 or 9, characterized in that the welding tool further comprises: A cover plate is located on the side of the second surface away from the first surface, and is connected to both the protective gas shell and the welding pressure plate; the cover plate has a second hollow area exposing the first hollow area; the cover plate and the welding pressure plate form a second negative pressure channel; the cover plate has an exhaust hole; the first negative pressure channel, the second negative pressure channel and the exhaust hole are connected in sequence. The welding tool according to claim 10 is characterized in that: A second groove structure is provided on the second surface of the welding plate; the cover plate partially covers the groove opening of the second groove structure to form the second negative pressure channel; the other end of the first negative pressure channel is connected to the second groove structure; the second groove structure has a first opening connected to the exhaust hole. The welding tool according to claim 10 or 11, characterized in that: There are multiple first negative pressure channels and multiple second negative pressure channels, and the multiple first negative pressure channels are connected with the multiple second negative pressure channels in a one-to-one correspondence; the part of the cover plate located at the exhaust hole and the protective gas shell form a collecting chamber; the exhaust hole is connected with the multiple first openings through the collecting chamber. The welding tool according to claim 12, characterized in that: The surface of the protective gas shell close to the cover plate has a third groove structure, and the part of the cover plate located at the exhaust hole covers the groove of the third groove structure to form the collecting chamber; the third groove structure has a plurality of second openings, and the plurality of first openings are opposite to and connected with the plurality of second openings. The welding tool according to any one of claims 8 to 13, characterized in that the welding tool further comprises: The adsorption structure is arranged in the first negative pressure channel and has an adsorption channel connected with the first negative pressure channel; the adsorption structure is used for adsorbing the workpiece to be welded. The welding tool according to claim 14 is characterized in that: The first negative pressure channel includes a first connecting channel and a second connecting channel that are connected; a step surface is formed between the first connecting channel and the second connecting channel, and the second connecting channel extends to the first surface; the adsorption structure is an annular structure, the adsorption structure is inserted into the second connecting channel, and contacts the step surface. A welding system, characterized in that it comprises: The welding tool as claimed in any one of claims 1 to 15; a gas supply device, communicated with the first gas inlet passage, and configured to provide a protective gas; The welding device is configured to weld the pre-welding position on the to-be-welded part through the first hollow area. The welding system according to claim 16, characterized in that The welding tool is the welding tool as claimed in any one of claims 8 to 15; The welding system further includes a gas extraction device which is in communication with the first negative pressure channel and is used for extracting gas in the first negative pressure channel.