CN116571882A - Welding system and production line - Google Patents

Abstract

The invention discloses a welding system which comprises a first positioning device, a second positioning device, a welding device, a dust removing assembly and a transferring assembly. The first positioning device is used for positioning the battery in a first direction and a second direction, the first positioning device is provided with a clamping assembly and a floating support, the clamping assembly clamps the battery, the floating support is arranged below the clamping assembly, the battery is placed on the floating support, and the position of the battery along a third direction is adjustable. The second positioning device is used for positioning the battery in a third direction. The welding device welds a welding position between the top cover and the housing. The dust removing device removes dust from the welding position in the welding process. The first positioning device is arranged on the transferring assembly, and the transferring assembly is used for transferring the battery arranged on the first positioning device so that the battery is abutted to the second positioning device or the welding device. The welding system can improve welding precision and welding quality.

Description

Welding system and production line

Technical Field

The invention relates to the technical field of welding equipment, in particular to a welding system and a production line.

Background

In the production process of the battery, it is necessary to weld the case and the top cover of the battery. In the welding process, whether the welding position of the shell and the top cover of the battery is accurately aligned with the welding head position can greatly influence the welding quality and the welding efficiency of the shell and the top cover. In the actual welding process, the quality of a welding line of a battery is not up to standard due to inaccurate positioning of the battery, the quality and performance of the battery are affected, and the yield of battery production is easily reduced. Particularly for laser welding, it is necessary to precisely locate the position of the battery to ensure that the welding position is within the focus range of the laser beam.

In the prior art, the battery is typically positioned by jacking a cylinder. However, since there may be a certain deviation in the size of each battery and the height of the cylinder is constant, the distance between the welding position and the welding device is not constant, which easily results in that the welding position is not in the focusing range of the laser beam, and the welding precision and the welding quality are affected, and the quality of the battery is further affected.

Disclosure of Invention

The invention aims to solve at least one of the known technical problems to a certain extent, and proposes a welding system capable of improving welding precision and welding quality. The invention further provides a production line with the welding system.

A welding system according to a first aspect of the present invention for welding a case and a top cover of a battery, comprising:

first positioner for in first direction and second direction to the battery location, first positioner is provided with:

a clamping assembly clamping the battery;

a floating support disposed below the clamping assembly, the battery being disposed on the floating support and the position of the battery being adjustable along a third direction perpendicular to the first and second directions;

Second positioning means for positioning the battery in the third direction;

a welding device for welding a welding position between the top cover and the shell;

the dust removing device is used for removing dust from the welding position in the welding process;

and the transfer assembly is used for conveying the battery mounted on the first positioning device so as to enable the battery to be in butt joint with the second positioning device or the welding device.

The welding system according to the first aspect of the invention has the following beneficial effects: the welding precision and the welding quality can be improved.

In some embodiments, the clamping assembly comprises:

the long side clamping pieces are at least two, are respectively arranged at two sides of the long side of the battery, and clamp the long side of the battery along the first direction;

the short side clamping pieces are at least two, the two short side clamping pieces are arranged on two sides of the short side of the battery, and the short side of the battery is clamped along the second direction.

In some embodiments, the clamping assembly further comprises at least one long side driver and one short side driver;

wherein the long side driver drives at least one long side clamping piece to drive the long side clamping piece to move along the direction vertical to the long side of the battery to the direction close to the battery so as to enable the long side clamping piece to clamp the battery,

the short side driver drives at least one short side clamping piece to drive the short side clamping piece to move along the direction perpendicular to the short side of the battery to the direction close to the battery so that the short side clamping piece clamps the battery.

In some embodiments, the floating support comprises a floating part and a supporting part, the floating part is movably connected with the supporting part, the battery is mounted on the supporting part, and the position of the battery along the third direction is adjustable through the floating part.

In some embodiments, the first positioning device further comprises a jacking member and a pre-positioning member;

the jacking piece is arranged below the battery and jacks the battery along the third direction;

the pre-positioning member positions at least the bottom surface and three side surfaces of the battery.

In some embodiments, the first positioning device further comprises a shield surrounding the clamping assembly.

In some embodiments, the second positioning device comprises:

the upper positioning piece is arranged above the battery and is used for positioning the battery along the third direction;

the upper locating piece is arranged on the first guide rail;

the first driving piece drives the upper positioning piece to move on the first guide rail along the third direction.

In some embodiments, the welding device comprises:

a bracket;

the scanning galvanometer is arranged on the bracket;

the second guide rail is arranged on the bracket, and the scanning galvanometer is arranged on the second guide rail;

the second driving piece drives the scanning galvanometer to move on the second guide rail along the third direction.

In some embodiments, the dust removal device is disposed below the welding device, the dust removal device comprising:

a body having a cavity for passing a laser light therethrough,

a gas hole for blowing gas toward the obliquely lower direction based on the horizontal plane is arranged on the body at a position which is lower than the inner part of the cavity,

The body is provided with a suction hole for sucking air obliquely upward based on a horizontal plane at a position above the inside of the cavity.

The production line according to the second aspect of the invention comprises a welding system according to any of the above.

The production line according to the second aspect of the invention has the following beneficial effects: the welding precision and the welding quality can be improved.

Drawings

Fig. 1 is a perspective view of a welding system of the present invention.

Fig. 2 is a perspective view of a first positioning device of the welding system mounted to a transfer assembly.

Fig. 3 is a top view of the first positioning device mounted to the transfer assembly.

Fig. 4 is a perspective view of the first positioning device.

Fig. 5 is an exploded view of the first positioning device.

Fig. 6 is a perspective view of the second positioning device.

Fig. 7 is a perspective view of the welding device.

Fig. 8 is a perspective view of the dust removing device.

Fig. 9 is a perspective view of the dust removing device.

Fig. 10 is a top view of the dust removing device.

Fig. 11 is a front view of the dust removing device.

Fig. 12 is a cross-sectional view at A-A in fig. 11.

Fig. 13 is an enlarged view at a in fig. 12.

Fig. 14 is a schematic diagram showing the flow direction of the shielding gas at A-A in fig. 11.

Fig. 15 is an enlarged view at B in fig. 14.

Reference numerals:

100. a first positioning device; 110. a clamping assembly; 111. a long side clamping member; 112. a short side clamping member; 113. a long side driver; 114. a short side driver; 120. a floating support; 121. a floating part; 121a, a guide shaft; 121b, springs; 122. a support part; 122a, a fixing frame; 122b, a support plate; 130. a jacking member; 140. a pre-positioning piece; 150. a protective cover; 160. a bottom plate; 170. a long-side resetting piece; 180. short side reset piece; 200. a second positioning device; 201. an upper positioning piece; 202. a first guide rail; 203. a first driving member; 300. a welding device; 301. a bracket; 302. scanning a vibrating mirror; 303. a second guide rail; 304. a second driving member; 400. a dust removal device; 401. a connecting plate; 402. a third guide rail; 410. a body; 411. a cavity; 412. a blow hole; 413. an air suction hole; 414. an annular air inlet cavity; 415. an annular air outlet cavity; 420. a substrate; 421. a first cavity; 422. a first conical surface; 423. a second conical surface; 430. a first deflector; 431. a second cavity; 432. a third conical surface; 433. a fourth conical surface; 434. a fifth conical surface; 440. a second deflector; 441. a third cavity; 442. a sixth conical surface; 450. an air inlet pipe; 460. an air outlet pipe; 500. a transfer assembly; 501. a servo module; 502. an auxiliary guide rail; 503. a drag chain; 600. a battery; 601. a housing; 602. a top cover; 700. a protective cover; 800. and a defocus amount detection assembly.

Detailed Description

Examples of the present embodiment are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The examples described below by referring to the drawings are illustrative only for the explanation of the present embodiment and are not to be construed as limiting the present embodiment.

In the description of the present embodiment, it should be understood that the direction or positional relationship indicated with respect to the direction description, such as up, down, front, rear, left, right, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present embodiment and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present embodiment.

In the description of the present embodiment, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present embodiment, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly, and those skilled in the art may reasonably determine the specific meaning of the above terms in the present embodiment in combination with the specific contents of the technical solution.

The development of new energy automobiles is continuously increased, the advantages and share of the global new energy automobile market are increasingly enlarged, and the country brings out related measures development and innovation in new energy, especially new energy automobiles, so that the production demand of new energy power batteries is greatly increased, and the size and the specification of the new energy power batteries are also increasingly larger. In the production process of the battery, the shell of the battery needs to be welded with the cover plate of the battery, and the welding quality at the welding position seriously affects the quality and performance of the battery. Therefore, in the welding process, the battery needs to be ensured to be stably fixed, and the welding position needs to be in the focusing range of the laser beam, so that the welding precision and the welding efficiency between the shell and the top cover of the battery can be ensured, and the quality of the battery is further ensured.

In the prior art, because in the welding process, the position between the position for placing the battery and the welding device is constant, when the deviation of the size of the battery occurs, the welding position between the shell and the top cover of the battery is easily caused to be not in the focusing range of the laser beam, so that the welding precision is poor, the welding quality and the welding efficiency are influenced, and the battery performance is seriously influenced. Therefore, it is necessary to design a welding system capable of adjusting the position of the battery in the third direction, and when the size of the battery changes, the position of the battery can be adjusted in the third direction, so that the welding position is always in the focusing range of the laser beam, the welding quality and the welding efficiency are ensured, and the quality and the performance of the battery are further ensured.

Referring to fig. 1 to 8, and mainly to fig. 1, a welding system for welding a top cover 602 and a case 601 of a battery 600 according to a first aspect of the present invention includes a first positioning device 100, a second positioning device 200, a welding device 300, a dust removing assembly, and a transfer assembly 500. The first positioning device 100 is used for positioning the battery 600 in a first direction and a second direction, the first positioning device 100 is provided with a clamping assembly 110 and a floating support 120, and the clamping assembly 110 clamps the battery 600. In this embodiment, a square aluminum case battery will be described as an example. The clamping assembly 110 clamps in the long side direction and the short side direction of the battery 600, the floating support 120 is disposed under the clamping assembly 110, the battery 600 is placed on the floating support 120, and the position of the battery 600 in a third direction perpendicular to the first direction and the second direction is adjustable. The second positioning device 200 is used to position the battery 600 in the third direction. The welding device 300 welds a welding position 603 between the top cover 602 and the housing 601. The dust removing device 400 removes dust from the welding position 603 during welding. The first positioning device 100 is mounted on the transfer assembly 500, and the transfer assembly 500 is used for transferring the battery 600 mounted on the first positioning device 100 so that the battery 600 is abutted against the second positioning device 200 or the welding device 300.

The front-back direction in the figure is a first direction, the left-right direction in the figure is a second direction, and the up-down direction in the figure is a third direction.

Specifically, in the present embodiment, the first positioning device 100 and the second positioning device 200 are provided, and the battery 600 can be positioned in the three-axis direction, that is, the first direction, the second direction, and the third direction, so that the position of the battery 600 is more accurate. The first positioning device 100 positions the battery 600 in the first direction and the second direction, i.e., positions in the X-axis and Y-axis directions. The second positioning device 200 positions the third direction of the battery 600 to adjust the distance between the welding position 603 between the housing 601 and the top cover 602 of the battery 600 and the welding device 300, so that the welding position 603 is within the focusing range of the laser beam, thereby ensuring the welding quality and the welding efficiency, and further ensuring the quality and the performance of the battery 600. Meanwhile, in order to protect the welding position 603 from oxidation during the welding process and collect welding scraps generated during the welding process, the welding system of the embodiment further includes a dust removing device 400 to prevent the welding position 603 from being polluted by dust. In the welding process, the dust removing device 400 is disposed around the welding position 603 to blow the shielding gas to the welding position 603 and to suck and collect dust generated in the welding process, thereby improving the welding accuracy. In addition, in order to ensure accurate matching between the devices, the welding system of the present embodiment further includes a transfer assembly 500, where the transfer assembly 500 includes a servo module, a secondary rail, and a drag chain, the servo module drives the first positioning device 100, and the secondary rail can assist in guiding the first positioning device 100, so as to ensure stability of the first positioning device 100 in the conveying process. The first positioning device 100 is installed at the transfer assembly 500, the transfer assembly 500 transfers the first positioning device 100 to the lower side of the second positioning device 200 so that the first positioning device 100 is in butt joint with the second positioning device 200, the first positioning device 100 positions the battery 600 in the first direction and the second direction, the second positioning device 200 positions the battery 600 in the third direction, after the positioning is completed, the transfer assembly 500 transfers the battery 600 of the first positioning device 100 to the lower side of the welding device 300 and the dust removing device 400 so that the welding position 603 of the battery 600 is in butt joint with the dust removing device 400, and finally the welding device 300 welds the welding position 603. The welding quality and welding accuracy are ensured, and the quality of the battery 600 is improved.

Further, the first positioning device 100 is configured to position the battery 600 in the first direction and the second direction, the first positioning device 100 is provided with a clamping assembly 110 and a floating support 120, the clamping assembly 110 clamps along the long side direction and the short side direction of the battery 600, the floating support 120 is disposed below the clamping assembly 110, the battery 600 is placed on the floating support 120, and the position of the battery 600 along the third direction is adjustable. The clamping assembly 110 is used to position the battery 600 in a first direction and a second direction, i.e., to position the battery 600 in the long and short sides of the battery 600. The height of the battery 600 floatingly mounted to the floating support 120 in the third direction may be adjusted by the second positioning device 200 such that the welding position 603 of the battery 600 is located within the focusing range of the laser beam, thereby improving the welding efficiency and welding quality, and further improving the quality of the battery 600.

The welding system according to the first aspect of the invention has the following beneficial effects: the welding accuracy and welding quality can be improved, and the quality of the battery 600 can be improved. Specifically, the first positioning device 100 and the second positioning device 200 cooperate to position the battery 600, and the battery 600 can be floatingly mounted on the floating support 120, the first positioning device 100 can position the battery 600 in the first direction and the second direction, the second positioning device 200 can adjust the position of the battery 600 in the third direction according to the size of the battery 600, so that the distance between the battery 600 and the laser emitting device is constant, the welding position 603 is ensured to be in the focusing range of the laser beam, the welding precision and the welding quality are improved, and the quality of the battery 600 is further improved.

[ first positioning device 100]

Referring to fig. 1 to 5, and in particular to fig. 4, the first positioning device 100 includes a clamping assembly 110 and a floating support 120. To more accurately position the battery 600, in some embodiments, the clamping assembly 110 includes a long side clamp 111 and a short side clamp 112. The long side clamping members 111 are provided at least in two, and the two long side clamping members 111 are provided at both sides of the long side of the battery 600, respectively, to clamp the long side of the battery 600 in the first direction. The short-side clamping members 112 are provided at least in two, and the two short-side clamping members 112 are provided at both sides of the short side of the battery 600 to clamp the short side of the battery 600 in the second direction. Specifically, the long side clamping members 111 may be provided in two, and the two long side clamping members 111 are provided at both sides of the long side of the battery 600, respectively. One of the two long side clamps 111 is provided as a fixed long side clamp 111, and one long side of the battery 600 abuts against the fixed long side clamp 111 as a long side positioning reference. The other long side clamping member 111 is provided as a movable long side clamping member 111 capable of moving in a direction perpendicular to the long side of the battery 600 such that the movable long side clamping member 111 clamps or releases the battery 600. The short side clamping members 112 may be provided in two, similarly to the long side clamping members 111, and the two short side clamping members 112 may be provided on both sides of the short side of the battery 600, respectively. One of the short-side clamps 112 is provided as a fixed short-side clamp 112, and one short side of the battery 600 abuts against the fixed short-side clamp 112 as a short-side positioning reference. The other short side clamping member 112 is provided as a movable short side clamping member 112 capable of moving in a direction perpendicular to the short side of the battery 600, so that the movable short side clamping member 112 clamps or releases the battery 600. The short side clamping member 112 cooperates with the long side clamping member 111 to position the battery 600 so that the battery 600 is fixed in the first direction and the second direction, welding accuracy is ensured, and quality of the battery 600 is improved.

It should be understood that, the two long side clamping members 111 and the two short side clamping members 112 may be movably disposed, and each long side clamping member 111 and each short side clamping member 112 may be driven by a driving member, so that each long side clamping member 111 approaches the long side of the battery 600, abuts and clamps the long side of the battery 600, and each short side clamping member 112 approaches the short side of the battery 600, abuts and clamps the short side of the battery 600, so that the battery 600 is accurately positioned.

The number of the long-side clamps 111 may be 3, 4, or more, for example, and the long sides of the battery 600 may be clamped and positioned at the same time. The short edge gripping assembly 110 may be similarly arranged.

Referring to fig. 2-4, in some embodiments, the clamping assembly 110 further includes at least one long side driver 113 and one short side driver 114. Wherein the long side driver 113 drives at least one long side clamping member 111, and drives the long side clamping member 111 to move in a direction perpendicular to the long side of the battery 600 toward the direction approaching the battery 600, so that the long side clamping member 111 clamps the battery 600. The short side driver 114 drives at least one short side clamping member 112 to drive the short side clamping member 112 to move in a direction perpendicular to the short side of the battery 600 toward the battery 600 so that the short side clamping member 112 clamps the battery 600. Specifically, to more precisely position the battery 600, the clamping assembly 110 further includes at least one long side driver 113 and one short side driver 114. When one of the two long side clamps 111 is provided as a fixed long side clamp 111 and the other is provided as a movable long side clamp 111, the long side driver 113 drives the movable long side clamp 111 to move toward the long side close to the battery 600 so that the movable long side clamp 111 abuts against the long side of the battery 600 to clamp the battery 600 together with the fixed long side clamp 111, thereby positioning the battery 600. The short side clamping member 112 is provided in the same manner as the long side clamping member 111.

In the present embodiment, the long-side driver 113 and the short-side driver 114 may be cylinders, electric cylinders, or the like, as long as the driving force can be provided, and the specific structure and form thereof are not limited here.

In some embodiments, the floating support 120 includes a floating portion 121 and a supporting portion 122, the floating portion 121 is movably connected with the supporting portion 122, the battery 600 is mounted on the supporting portion 122, and a position of the battery 600 in the third direction is adjustable by the floating portion 121. Specifically, the floating part 121 includes a guide shaft 121a and a spring 121b, and the supporting part 122 includes a fixing frame 122a and a supporting plate 122b. The fixing frame 122a is provided with a through hole, the guide shaft 121a penetrates through the through hole, the spring 121b is penetrated at one end of the guide shaft 121a, which extends out of the upper portion of the through hole, and one end of the guide shaft 121a, which extends out of the lower portion of the through hole, is connected with the supporting plate 122b, so that the guide shaft 121a can move up and down in the through hole under the action of the spring 121b, and the guide shaft 121a drives the supporting plate 122b to move up and down. The battery 600 passes through the fixing frame 122a and is placed on the supporting plate 122b, under the action of the elasticity of the spring 121b, the guide shaft 121a can move up and down in the through hole under the action of the spring 121b, so that the height of the battery 600 placed on the supporting plate 122b is adjustable, the welding position 603 is ensured to be in the focusing range of the laser beam, the welding precision and the welding quality are improved, and the quality of the battery 600 is further improved.

Referring to fig. 5, in some embodiments, the first positioning device 100 further includes a lift-up member 130 and a pre-positioning member 140. The lifting member 130 is disposed below the battery 600, and lifts the battery 600 along the third direction. The pre-positioning member 140 positions at least the bottom surface and three side surfaces of the battery 600. Specifically, to prevent the clamping assembly 110 from being biased in positioning the battery 600, the first positioning device 100 further includes a pre-positioning member 140. When the battery 600 is mounted on the first positioning device 100, the pre-positioning member 140 positions the battery 600 first, and then the clamping assembly 110 positions the battery 600, so that the positioning accuracy of the battery 600 can be further improved, the welding accuracy is ensured, the welding quality is improved, and the quality of the battery 600 is further improved.

In addition, the first positioning device 100 further includes a lifting member 130, where the lifting member 130 is disposed below the battery 600 to lift the battery 600, so as to facilitate taking and placing of the battery 600. The lifting member 130 may be an air cylinder, an electric cylinder, or the like, as long as it can provide a lifting driving force to the battery 600, and the specific structure and form thereof are not limited herein.

In some embodiments, the first positioning device 100 further includes a shield 150, the shield 150 surrounding the clamping assembly 110. Specifically, to avoid contamination of the battery 600, the first positioning device 100 further includes a protection cover 150, where the protection cover 150 protects the battery 600 and the clamping assembly 110 from dust around the clamping assembly 110. In addition, the shield 150 can also mount other electrical components, saving space and improving the mounting strength of each component. Each component is tightly connected, stacked and nested, so that the whole device is compact and simple in structure and cost is saved.

In addition, in order to ensure that the protection cover 150 can be stably conveyed on the transfer assembly 500, a notch is formed in the protection cover, and the drag chain is mounted at the notch of the protection cover, so that space can be saved while stable conveying is ensured, and the whole structure of the device is compact.

In addition, in order to facilitate the installation of the first positioning device 100 to the transfer assembly 500 and to ensure compactness between the components of the apparatus, the first positioning device 100 further includes a base plate 160. The clamping assembly 110 is mounted to the base plate 160, the base plate 160 is provided with an opening through which the battery 600 can pass, be placed on the support 122, and be lifted by the lower lifting member 130.

In some embodiments, the first positioning device 100 further includes a long side reset member 170 and a short side reset member 180, the long side reset member 170 being configured to reset the movable long side clamp 111 and the short side reset member 180 being configured to reset the movable short side clamp 112.

Second positioning device 200

Referring to fig. 1 and 6, in some embodiments, the second positioning device 200 includes an upper positioning member 201, a first rail 202, and a first driving member 203. The upper positioning member 201 is disposed above the battery 600, and positions the battery 600 in the third direction. The upper positioning member 201 is mounted on the first guide rail 202, and the first driving member 203 drives the upper positioning member 201 to move on the first guide rail 202 in the third direction. Specifically, in order to position the battery 600 in the third direction, the welding system is further provided with the second positioning device 200, the upper positioning member 201 positions the top cover 602 of the battery 600 and the housing 601 of the battery 600, so that the top cover 602 and the housing 601 are accurately abutted, and the upper positioning member 201 can move along the first guide rail 202 under the driving of the first driving member 203, so that the battery 600 is positioned in the third direction, the welding precision is ensured, and the quality of the battery 600 is further ensured.

[ welding apparatus 300]

Referring to fig. 1 and 7, in some embodiments, the welding apparatus 300 includes a bracket 301, a scanning galvanometer 302, a second rail 303, and a second driver 304. The scanning galvanometer 302 is mounted to the mount 301. The second rail 303 is mounted to the bracket 301, and the scanning galvanometer 302 is mounted to the second rail 303. The second driving member 304 drives the scanning galvanometer 302 to move on the second rail 303 in the third direction. In order to enable the distance between the scanning galvanometer 302 and the welding position 603 to be adjustable, and facilitate installation and debugging, the welding device 300 is further provided with a second guide rail 303 and a second driving piece 304, and the second driving piece 304 drives the scanning galvanometer 302 to move on the second guide rail 303, so that welding precision is guaranteed, and further quality of the battery 600 is guaranteed.

[ dust collector 400]

Referring to fig. 1, 8 to 15, in some embodiments, the dust removing device 400 is disposed below the welding device 300, the dust removing device 400 is mounted on the bracket 301 through the connection plate 401, and a third guide rail 402 is further disposed on the connection plate 401, the dust removing device 400 is mounted on the connection plate 401 through the third guide rail 402, and the dust removing device 400 can move on the third guide rail 402 along a third direction, so that the dust removing device 400 is matched with the welding position 603 of the battery 600 to accurately perform air blowing dust removal on the welding position 603. The dust removing device 400 includes a body 410, the body 410 having a cavity 411 for passing laser light therethrough, a gas hole 412 for blowing gas toward a obliquely lower direction based on a horizontal plane being provided on the body 410 at a position below the inside of the cavity 411, and a gas suction hole 413 for sucking gas toward an obliquely upper direction based on a horizontal plane being provided on the body 410 at a position above the inside of the cavity 411.

During laser welding of the housing 601 and the top cover 602, a large amount of soot is generated near the welding site 603, and the soot may form defects such as dust pollution and slag at the welding site. Because smoke and dust temperature is higher and the adhesion is very strong, if not in time get rid of the smoke and dust, less smoke and dust granule in the smoke and dust can adhere to battery anchor clamps or battery 600, causes the pollution to battery 600, and then influences the quality of battery 600, and great smoke and dust granule then can glue to battery anchor clamps and be difficult to clear away, influences welding precision, and then also can influence the quality of battery 600. Therefore, when the case 601 and the top cover 602 are laser welded, the welding position 603 needs to be protected by blowing, so that on one hand, oxidation of a welding seam can be avoided, on the other hand, generated smoke dust can be taken away, and welding quality and performance of the battery 600 are ensured.

In the laser welding dust removing apparatus 400 of the prior art, the air vent 412 is generally disposed perpendicular to the welding seam, and the shielding gas blown out from the air vent 412 cannot completely cover the welding position 603, so that a better air-blowing protecting effect cannot be achieved. And because the protective cover 700 without the top cover 602 or the edge of the protective cover 700 is in a right-angle structure, dead angles exist in the protective gas diversion cavity, and smoke dust or dust generated in the welding process is easy to accumulate in the diversion cavity, so that the dust is dissipated and adsorbed around the welding position 603, and the welding quality is affected.

Therefore, in order to make the protection gas that blows out can cover welding position 603 completely, reach better protection effect of blowing, and there is not the dead angle in the water conservancy diversion intracavity, the dust is difficult to accumulate in the water conservancy diversion intracavity, reduces the dust loss, improves welding quality, and the welding system of this embodiment still includes dust collector 400. The dust removing device 400 includes a body 410, the body 410 has a cavity 411 for passing laser, the cavity 411 is located at the center of the inside of the body 410, and is a cavity penetrating up and down, the laser can pass through the cavity 411 of the body 410 to weld the housing 601 and the top cover 602. The body 410 is provided with a gas hole 412 for blowing gas toward the obliquely lower side based on the horizontal plane at a position below the inside of the cavity 411, and the body 410 is provided with a gas hole 413 for sucking gas toward the obliquely upper side based on the horizontal plane at a position above the inside of the cavity 411. Specifically, during the welding process, shielding gas is blown out from the gas vent 412 to the welding site 603 to form a shielding gas layer at the welding site 603 to isolate the welding site 603 from air and prevent oxidation of the welding site. The air suction holes 413 can suck air around the axis of the cavity 411, and when dust generated in the welding process passes through the air suction holes 413, the dust can be timely sucked away by the air suction holes 413, so that the dust is prevented from being dissipated into the environment or attached to the battery 600 to influence the quality of the battery 600.

Further, in order to protect the electrode post of the battery 600 from being contaminated by welding slag during the laser welding process, and to guide the shielding gas and dust at the same time, the shielding gas mixed with dust is guided to the air suction hole 413, and the welding system of the present embodiment further includes a protection cover 700. The protection cover 700 is mounted above the top cover 602 of the battery 600, and the protection cover 700 is accommodated in the cavity 411 in a top view, wherein a side edge of the protection cover 700 is arc-shaped. In order to ensure that there is no dead angle of suction, the side edges of the protection cover 700 are provided in an arc shape, and the dust and the shielding gas are guided so that the shielding gas and the entrained dust blown out from the gas blowing hole 412 can be sucked away by the gas suction hole 413 in a path of arc transition. The welding quality is ensured by preventing dust from being accumulated at the side edge of the protection cover 700 to cause the dust to escape into the environment and to be attached to the welding position 603 of the housing 601 and the top cover 602, thereby ensuring the performance of the battery 600.

In addition, the air blowing hole 412 is arranged below the air suction hole 413, so that the air blowing protection effect can be further improved, the contact area between the shielding gas and the welding position 603 is increased, and meanwhile, dust can be blown upwards by the shielding gas, so that the dust can be sucked away by the air suction hole 413 more easily, the dust is prevented from being deposited below under the action of gravity, the welding position 603 of the battery 600 is polluted, and the welding quality is affected.

The dust collector 400 can make the protection gas that blows out cover welding position 603 completely, reaches better protection effect of blowing, and does not have the dead angle in the water conservancy diversion intracavity, and the dust is difficult to accumulate in the water conservancy diversion intracavity, reduces the dust loss, improves welding quality. Specifically, the shielding gas is blown out from the blowing hole 412 obliquely downward based on the horizontal plane to the welding position 603 so that the weld between the housing 601 and the top cover 602 is in a state of being shielded by the shielding gas, while dust generated during the laser welding is blown up, and the suction hole 413 sucks out the blown dust and the shielding gas. Because the air hole 412 is arranged obliquely downward based on the horizontal plane, the blown protection air can completely cover the welding position 603, and a better air blowing protection effect is achieved. And because the side edge of the protective cover 700 is arc-shaped, no dead angle exists in the moving path of dust, dust is not easy to accumulate on the side edge of the protective cover 700, the dust collection rate is improved, the dust dissipation can be reduced, and the welding quality is improved.

Referring to fig. 9 and 10, in some embodiments, the gas vent 412 is annular and is disposed about the axis of the cavity 411. Specifically, the gas blowing hole 412 may be provided in a ring shape, and the ring-shaped gas blowing hole 412 may be matched with the welding position 603 of the housing 601 and the top cover 602, so that the area of the shielding gas covering the welding position 603 is increased, and a better gas flow out effect is ensured.

Further, as for the shape of the cavity 411, it may be specifically set according to the shape of the battery 600. For example, when the battery 600 is a square aluminum case battery 600, the cavity 411 may be provided in a rounded rectangular shape so that the shape of the cavity 411 matches the shape of the square aluminum case battery 600. Therefore, when the square aluminum-shell battery 600 is inserted into the cavity 411, the distance between the welding position 603 of the square aluminum-shell battery 600 and the inner wall of the cavity 411 is smaller, so that the casing 601 and the top cover 602 are welded under a sufficient protection condition, so as to improve the welding quality and further improve the performance of the battery 600.

In some embodiments, the plurality of blow holes 412 are provided, and the plurality of blow holes 412 are circumferentially distributed in the body 410 along the cavity 411. Specifically, in addition to the above-mentioned configuration of the gas blowing holes 412 being one and the annular surrounding manner of blowing the shielding gas at the welding position 603, a plurality of gas blowing holes 412 may be provided, and the plurality of gas blowing holes 412 are uniformly and alternately disposed in the body 410 along the cavity 411 in a circumferential surrounding manner, so as to ensure that the shielding gas blown out from each gas blowing hole 412 is uniformly distributed at the welding position 603, and ensure the welding quality. It will be appreciated that the blowholes 412 may take other suitable shapes or arrangements, and may be specifically selected according to actual needs, which are not limited herein.

Referring to fig. 11, 12 and 13, in some embodiments, the cross-sectional shape of the gas blowing holes 412 and the gas suction holes 413 in the third direction is a flared cone with a smaller upper part and a larger lower part. Specifically, the air hole 412 and the air suction hole 413 are both annular, and the cross-sectional shape of the air hole 412 along the third direction is tapered in a flaring shape with a small top and a large bottom, and on the one hand, the air hole 412 is configured to be obliquely downward based on the horizontal plane, so that the air pressure of the shielding gas at the inlet of the air hole 412 can be increased, and the effect of blowing the shielding gas can be improved. On the other hand, the cross section of the gas blowing hole 412 is in a conical shape with a flaring shape with a small upper part and a big lower part along the third direction, so that the flow rate of the shielding gas can be controlled, the energy consumption is saved, the area of the welding seam covered by the shielding gas is increased, and the pressure flow rate of the whole circumference of the battery 600 is uniform.

The design of the blow hole 412 is referred to herein as a "Laval nozzle" configuration. The Laval nozzle is an important component of the thrust chamber, the front half part of the nozzle is contracted from large to small to the middle to a narrow throat, the narrow throat is then expanded from small to large to the bottom of the arrow, and the gas in the arrow body flows into the front half part of the nozzle under high pressure, passes through the narrow throat and then escapes from the rear half part. This structure allows the velocity of the air stream to be varied by varying the spray cross-sectional area. The gas flow in the rocket engine moves backwards through the spray pipe under the pressure of the combustion chamber and enters the first stage of the spray pipe. At this stage, the gas movement follows the principle of "the flow velocity is large at a small section and the flow velocity is small at a large section when the fluid moves in the tube", so that the gas flow is continuously accelerated. When the narrow throat is reached, the flow rate has exceeded the sonic velocity. While transonic fluid does not follow the principle of 'large flow rate at small section and small flow rate at large section' when moving, but rather is contrary, the larger the section, the faster the flow rate. In the second stage, the velocity of the gas flow is further accelerated, thus generating a large thrust. The laval nozzle in effect acts as a "flow rate increaser". In this embodiment, the gas vent 412 is provided in a tapered shape with a flaring shape having a small top and a large bottom, so that the flow rate of the shielding gas can be increased, the effect of blowing the shielding gas is improved, the energy is saved, the area of the shielding gas covering the weld joint can be increased, the pressure flow rate of the whole circumference of the battery 600 is uniform, and the welding quality is further ensured.

Referring to fig. 12 and 13, in some embodiments, an annular air inlet chamber 414 is provided in communication with the air hole 412 at a lower position of the body 410, the annular air inlet chamber 414 being disposed around the axial center of the cavity 411. An annular discharge chamber 415 communicating with the suction hole 413 is provided at an upper position of the body 410, and the annular discharge chamber 415 is provided around the axial center of the cavity 411. Specifically, the annular air inlet cavity 414 is communicated with the air blowing hole 412, the protection air is blown out through the air blowing hole 412 through the annular air inlet cavity 414, the volume of the annular air inlet cavity 414 is larger than that of the air blowing hole 412, the flow rate of the protection air entering the air blowing hole 412 through the annular air inlet cavity 414 can be increased, and the effects of air blowing protection and dust removal are improved. Meanwhile, the area of the shielding gas covering the welding seam can be increased, and the welding quality is improved. The annular air outlet cavity 415 is communicated with the air suction holes 413, dust and protective gas are sucked into the annular air outlet cavity 415 through the air suction holes 413, and then the dust is guided out and collected through the annular air outlet cavity 415, so that the influence of dust dissipation on the environment is avoided.

The air blowing holes 412, the air suction holes 413 and the side edges of the protective cover 700 together define a flow guiding cavity, and the protective gas blown out by the air blowing holes 412 can be uniformly conducted to the air suction holes 413 through the transition of the flow guiding cavity, so that the air suction holes 413 can uniformly and stably absorb the protective gas and dust around the axis of the cavity 411, and the collection rate of dust is improved.

In addition, the shielding gas can be helium or argon, specifically, in the laser welding process, the common shielding gas mainly comprises nitrogen, helium or argon, but because the nitrogen can chemically react with aluminum alloy and carbon steel at a certain temperature to generate nitride, the brittleness of the welding seam can be improved, the toughness is reduced, and the mechanical property of the welding seam joint can be greatly adversely affected. Since the case 601 of the battery 600 is mostly an aluminum case, helium or argon is used as the shielding gas in the present embodiment in order to avoid the reaction between nitrogen and the aluminum case. Helium gas is minimally ionized, ascending metal vapor generated from a metal molten pool can be quickly expelled, helium is used as a protective gas, plasma can be maximally restrained, and accordingly penetration is increased, and welding speed is improved. In addition, helium gas is light and can escape, so that air holes are not easily formed at the welding position 603, the welding quality can be improved, and the performance of the battery 600 can be ensured.

Referring to fig. 11 and 12, in some embodiments, the body 410 includes a substrate 420, a first baffle 430, and a second baffle 440. The first deflector 430 and the substrate 420 are stacked on each other, and the first deflector 430 is disposed above the substrate 420, and the first deflector 430 is fixedly connected to the substrate 420. The second deflector 440 and the first deflector 430 are stacked on each other, and the second deflector 440 is disposed above the first deflector 430, and the second deflector 440 is fixedly connected to the first deflector 430. The substrate 420 is formed with a first cavity 421, the first baffle 430 is formed with a second cavity 431, the second baffle 440 is formed with a third cavity 441, and the first cavity 421, the second cavity 431 and the third cavity 441 together form the cavity 411. Specifically, in this embodiment, the body 410 may be formed by arranging the substrate 420, the first baffle 430 and the second baffle 440 together, so as to process the substrate 420, the first baffle 430 and the second baffle 440, thereby reducing the production cost and the construction difficulty. In the laser welding process, the laser welds the housing 601 and the top cover 602 through the cavity 411 formed by the first cavity 421, the second cavity 431 and the third cavity 441 together, so as to ensure welding accuracy.

In some embodiments, the base plate 420 and the first baffle 430 cooperate to define the blow hole 412 and the annular inlet cavity 414, and the first baffle 430 and the second baffle 440 cooperate to define the suction hole 413 and the annular outlet cavity 415. Specifically, the substrate 420 is disposed below the first baffle 430, the second baffle 440 is disposed above the first baffle 430, and the order of the second baffle 440, the first baffle 430, and the substrate 420 is from top to bottom. The surfaces of the substrate 420 and the first deflector 430, which are close to each other, jointly limit the air blowing hole 412 and the annular air inlet cavity 414, wherein the air blowing hole 412 is communicated with the annular air inlet cavity 414, and the volume of the annular air inlet cavity 414 is larger than that of the air blowing hole 412, so that the flow rate of the shielding air blown out by the air blowing hole 412 is increased, and a good air blowing effect is ensured.

Referring to fig. 14 and 15, in some embodiments, a first conical surface 422 and a second conical surface 423 are formed on a surface of the substrate 420 adjacent to the first baffle 430, a third conical surface 432 and a fourth conical surface 433 are formed on a surface of the first baffle 430 adjacent to the substrate 420, the first conical surface 422 and the third conical surface 432 together limit the blowhole 412, and the second conical surface 423 and the fourth conical surface 433 together limit the annular intake chamber 414. A fifth tapered surface 434 is formed on a surface of the first baffle 430 adjacent to the second baffle 440, a sixth tapered surface 442 is formed on a surface of the second baffle 440 adjacent to the first baffle 430, and the fifth tapered surface 434 and the sixth tapered surface 442 together define the air intake 413. Due to the arrangement of the above structure, the air blowing hole 412 and the annular air inlet cavity 414 are formed by limiting the substrate 420 and the first guide plate 430 together, the air suction hole 413 and the annular air inlet cavity 414 are formed by limiting the first guide plate 430 and the second guide plate 440 together, so that the air suction hole is convenient to process, when the internal structure needs to be adjusted, the substrate 420, the first guide plate 430 and the second guide plate 440 can be separately processed, and then the air suction hole 413 and the annular air inlet cavity 414 are fixed, so that the adjustment of the internal structure can be completed, and the air suction hole is convenient to process and convenient to maintain. The substrate 420 and the first guide plate 430 and the second guide plate 440 are fixedly connected, and the connection modes can adopt bonding, welding and the like, so that stable connection can be realized, gaps between the substrate 420 and the first guide plate 430 and gaps between the first guide plate 430 and the second guide plate 440 can be sealed, the protection gas can be sucked into the suction holes 413 from the gas blowing holes 412 through the guide cavities, the suction efficiency is improved, the dust collection rate is further improved, and the welding quality is guaranteed.

In addition, the second conical surface 423 of the substrate 420 and the fourth conical surface 433 of the first baffle 430 together define the annular air inlet chamber 414, and since the second conical surface 423 is a surface inclined downward based on a horizontal plane, the thickness of the substrate 420 can be increased compared to a surface disposed horizontally, and the risk of deformation of the substrate 420 can be reduced.

In addition, the substrate 420 is made of high temperature resistant materials such as red copper, so as to ensure the strength of the substrate 420 and avoid the deformation of the substrate 420 due to heating in the welding process.

Referring to fig. 14 and 15, in some embodiments, an air inlet pipe 450 is connected to an end of the annular air inlet cavity 414 near the outer surface of the second baffle 440, and the shielding air is blown into the annular air inlet cavity 414 through the air inlet pipe 450 and then blown out through the air blowing hole 412. One end of the annular discharge cavity 415, which is close to the outer surface of the first deflector 430, is connected with an air outlet pipe 460, and dust and shielding gas are sucked into the annular discharge cavity 415 through the air suction holes 413 and then sucked out through the air outlet pipe 460. Specifically, the air inlet pipe 450 is connected with an external air inlet device, the protection air is blown into the annular air inlet cavity 414 through the air inlet pipe 450, then blown out to the welding position 603 through the air blowing hole 412, dust mixed with the protection air is guided to the air suction hole 413 through the guide cavity, sucked out through the annular air outlet cavity 415 through the air outlet pipe 460, and then the dust is collected by the air suction device.

In some embodiments, a plurality of air inlet pipes 450 are provided, the plurality of air inlet pipes 450 are circumferentially distributed at intervals on the periphery of the first deflector 430, and the air inlet pipes 450 are communicated with a negative pressure air source for blowing in protective air into the air inlet pipes 450. The air outlet pipes 460 are provided in plurality, the plurality of air outlet pipes 460 are circumferentially distributed at intervals on the periphery of the second deflector 440, and the air outlet pipes 460 are communicated with a negative pressure air source and are used for providing suction force for the air outlet pipes 460. Specifically, the shielding gas may be helium or argon, the air inlet device may be a high-pressure steel bottle, the shielding gas is generally contained in the high-pressure steel bottle, and the shielding gas in the high-pressure steel bottle is introduced into the air blowing hole 412 through the air inlet pipe 450 when the high-pressure steel bottle needs to be used. The negative pressure air source connected with the air outlet pipe 460 can be generated by a dust collector, and the dust collector can collect sucked dust while generating negative pressure through a fan to provide suction force for the air outlet pipe 460. The plurality of air inlet pipes 450 are arranged, so that the annular air inlet cavity 414 can be uniformly blown, and the effect of blowing the shielding gas is improved. The plurality of air outlet pipes 460 are arranged, so that the air suction holes 413 can uniformly suck air around the axis of the cavity 411, the air suction effect is improved, the dust absorption rate is improved, and the welding quality is further ensured.

[ transfer Assembly 500]

Referring to fig. 1 to 3, in order to ensure accurate matching between the devices, the welding system of the present embodiment further includes a transfer assembly 500, where the transfer assembly 500 includes a servo module, a secondary rail, and a drag chain, the servo module drives the first positioning device 100, and the secondary rail can assist in guiding the first positioning device 100 to ensure stability of the first positioning device 100 in a conveying process. The first positioning device 100 is mounted on the transfer assembly 500, the transfer assembly 500 transfers the first positioning device 100 to the lower side of the second positioning device 200, the first positioning device 100 is in butt joint with the second positioning device 200, the first positioning device 100 positions the battery 600 in the first direction, and the second positioning device 200 positions the battery 600 in the second direction. After the positioning is completed, the transfer unit 500 transfers the battery 600 of the first positioning device 100 to the lower side of the welding device 300 and the dust removing device 400, so that the welding position 603 of the battery 600 is in butt joint with the dust removing device 400, and finally, the welding device 300 welds the welding position 603. The welding quality and welding accuracy are ensured, and the quality of the battery 600 is improved.

[ defocus amount detecting Member ]

Referring to fig. 1 and 6, in some embodiments, the welding system further comprises a defocus amount detector. Defocus refers to the distance the surface of a workpiece is offset from the focal plane. The defocus position directly affects the pinhole effect when tailor welded. There are two ways of defocus: positive defocus and negative defocus. The focal plane is located above the workpiece and is positive defocus and vice versa. When the positive and negative defocus amounts are equal, the power densities of the corresponding planes are approximately the same, but the shapes of the melt pools obtained are different in practice. At negative defocus, a greater penetration is obtained, which is related to the formation of the puddle. Experiments show that when the laser heats 50-200 mu s, the material starts to melt to form liquid phase metal, partial vaporization occurs, high pressure vapor is formed, and the high pressure vapor is sprayed at an extremely high speed to emit glaring white light. At the same time, the high concentration gas moves the liquid metal to the edge of the bath, forming a pit in the center of the bath. When the negative defocus is carried out, the internal power density of the material is higher than the surface, and stronger melting and gasification are easy to form, so that light energy is transmitted to the deeper part of the material. Therefore, when the penetration is large in practical application, negative defocusing is adopted, and when thin materials are welded, positive defocusing is adopted. In the present embodiment, the defocus amount detecting member can detect whether the welding position 603 is located within the focusing range of the laser beam, ensure that a desired welding effect is achieved, and improve welding accuracy and welding quality, and further improve the quality of the battery 600.

A production line according to the second aspect of the invention comprises a welding system according to any of the above.

The production line according to the second aspect of the invention has the following beneficial effects: the welding accuracy and welding quality can be improved, and the quality of the battery 600 can be improved. Specifically, when the welding system of the embodiment is applied to a production line, the welding system can be matched with a manipulator to automatically feed and discharge, the battery 600 is conveyed in place through a conveying device, the manipulator installs the battery 600 on the welding system, and after welding is completed, the manipulator feeds the battery 600 again and continues to convey. The welding precision and the welding quality are improved, the production efficiency is improved, and the manpower is saved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While examples of the present embodiment have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the embodiments, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A welding system for welding a case (601) and a top cover (602) of a battery (600), comprising:

a first positioning device (100) for positioning the battery (600) in a first direction and a second direction, the first positioning device (100) being provided with:

-a clamping assembly (110), the clamping assembly (110) clamping the battery (600);

-a floating support (120), the floating support (120) being arranged below the clamping assembly (110), the battery (600) being placed on the floating support (120) and the position of the battery (600) being adjustable along a third direction perpendicular to the first and second directions;

-second positioning means (200) for positioning said battery (600) in said third direction;

a welding device (300) for welding a welding position between the top cover (602) and the housing (601);

A dust removal device (400), the dust removal device (400) removing dust from the welding location during welding;

and a transfer assembly (500), wherein the first positioning device (100) is mounted on the transfer assembly (500), and the transfer assembly (500) is used for conveying the battery (600) mounted on the first positioning device (100) so as to enable the battery (600) to be in butt joint with the second positioning device (200) or the welding device (300).

2. The welding system of claim 1, wherein the clamping assembly (110) comprises:

the long side clamping pieces (111), at least two long side clamping pieces (111) are arranged, the two long side clamping pieces (111) are respectively arranged at two sides of the long side of the battery (600), and the long side of the battery (600) is clamped along the first direction;

the short-side clamping pieces (112), the short-side clamping pieces (112) are at least two, the two short-side clamping pieces (112) are arranged on two sides of the short side of the battery (600), and the short side of the battery (600) is clamped along the second direction.

3. The welding system of claim 2, wherein the clamping assembly (110) further comprises at least one long side driver (113) and one short side driver (114);

Wherein the long side driver (113) drives at least one long side clamping piece (111), drives the long side clamping piece (111) to move along the direction vertical to the long side of the battery (600) to the direction close to the battery (600) so that the long side clamping piece (111) clamps the battery (600),

the short side driver (114) drives at least one short side clamping member (112), and drives the short side clamping member (112) to move in a direction perpendicular to the short side of the battery (600) toward the battery (600) so that the short side clamping member (112) clamps the battery (600).

4. A welding system according to claim 3, characterized in that the floating support (120) comprises a floating part (121) and a supporting part (122), the floating part (121) is movably connected with the supporting part (122), the battery (600) is mounted to the supporting part (122), and the position of the battery (600) in the third direction is adjustable by means of the floating part (121).

5. The welding system of claim 4, wherein the first positioning device (100) further comprises a jacking member (130) and a pre-positioning member (140);

the jacking piece (130) is arranged below the battery (600) and jacks the battery (600) along the third direction;

The pre-positioning member (140) positions at least the bottom surface and three side surfaces of the battery (600).

6. The welding system of claim 5, wherein the first positioning device (100) further comprises a shield (150), the shield (150) surrounding the clamping assembly (110).

7. The welding system of claim 1, wherein the second positioning device (200) comprises:

an upper positioning member (201), wherein the upper positioning member (201) is arranged above the battery (600) and is used for positioning the battery (600) along the third direction;

a first guide rail (202), the upper positioning piece (201) being mounted on the first guide rail (202);

-a first driving member (203), said first driving member (203) driving said upper positioning member (201) to move on said first guide rail (202) along said third direction.

8. The welding system of claim 1, wherein the welding device (300) comprises:

a holder (301);

a scanning galvanometer (302), the scanning galvanometer (302) being mounted to the bracket (301);

a second guide rail (303), wherein the second guide rail (303) is mounted on the bracket (301), and the scanning galvanometer (302) is mounted on the second guide rail (303);

And a second driving piece (304), wherein the second driving piece (304) drives the scanning galvanometer (302) to move on the second guide rail (303) along the third direction.

9. The welding system of claim 1, wherein the dust removal device (400) is disposed below the welding device (300), the dust removal device (400) comprising:

a body (410), the body (410) having a cavity (411) for passing laser light therethrough;

a gas blowing hole (412) for blowing gas obliquely downward in the second direction is provided in the body (410) at a position below the interior of the cavity (411);

the body is provided with an air intake hole (413) for sucking air obliquely upward in the second direction at a position above the inside of the cavity (411).

10. Production line, characterized by comprising a welding system according to any of claims 1 to 9.