A sealing laser welding device
By introducing a cover and protective gas system into the sealing laser welding device, the problem of oxidation at the welding position is solved, achieving high-quality and high-reliability welding, and adapting to the welding needs of different battery diameters.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN ZHONGJI AUTOMATION CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-30
AI Technical Summary
Existing laser welding equipment for sealing often suffers from rapid loss of protective gas at the welding site due to the dust removal unit during the welding process, leading to oxidation at the welding site and affecting welding quality and reliability.
The system adopts a cover structure with a protective gas inlet channel and a laser inlet hole. The laser emitted by the laser welding unit enters the cover through the laser inlet hole, and the protective gas output unit inputs protective gas into the cover to form a protective gas environment, which prevents oxidation at the welding position and prevents dust from splashing by rotating the protective gas flow.
It effectively avoids oxidation at the welding position, improves welding quality and reliability, reduces operational difficulty, adapts to different battery diameters, and improves welding efficiency.
Smart Images
Figure CN224424551U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of laser welding technology, and more particularly to a sealing laser welding apparatus. Background Technology
[0002] For existing all-tab cell sealing welding, high-speed machines typically use a turret welding method. That is, the cylindrical battery to be welded moves to the sealing welding turret, the fixed unit is positioned, and when the cylindrical battery to be welded rotates to be opposite the laser welding unit, the turret stops moving, and then the laser begins welding. Low-speed machines generally use a linear horizontal welding method.
[0003] However, the dust removal unit in the existing sealing laser welding equipment can cause negative pressure at the welding point, which leads to the rapid loss of protective gas at the welding position and oxidation at the previously welded location. Utility Model Content
[0004] The purpose of this application is to provide a sealing laser welding device that can avoid oxidation of the cylindrical battery to be welded at the welding position, improve the welding yield, and improve the reliability of the sealing laser welding device.
[0005] This application discloses a sealing laser welding device for welding cylindrical batteries. The sealing laser welding device includes a laser welding unit, a dust removal unit, and a fixing unit. The fixing unit is used to fix the cylindrical battery to be welded. The laser welding unit is used to emit laser light to the welding position of the cylindrical battery to be welded. The dust removal unit is used to absorb the dust generated during welding.
[0006] The sealing laser welding device further includes a cover and a protective gas output unit. The cover is connected to the fixing unit, and a battery inlet is provided at the bottom of the cover. A protective gas inlet channel and a laser inlet are provided on the side wall of the cover. The protective gas output unit is connected to the protective gas inlet channel and is used to input protective gas into the cover. The top of the cylindrical battery to be welded extends into the cover from the battery inlet, and the laser emitted by the laser welding unit enters into the cover from the laser inlet.
[0007] Optionally, the cover includes a main sidewall and a constricted sidewall, the constricted sidewall being connected to the main sidewall, the protective gas inlet channel and the laser inlet being both disposed on the main sidewall, the end of the constricted sidewall away from the main sidewall forming the battery inlet, and the constricted sidewall being inclined toward the axis of the cover.
[0008] Optionally, the outer wall of the constricted sidewall is connected to the inner wall of the main sidewall by a thread.
[0009] Optionally, the protective gas inlet channel includes a first sub-channel and a second sub-channel, which are respectively disposed on the left and right sides of the main sidewall; the first sub-channel and the second sub-channel are both disposed obliquely on the same horizontal plane, and the first sub-channel and the second sub-channel are respectively oriented towards the front and rear sides of the main sidewall.
[0010] Optionally, the fixing unit includes a main support plate, a lifting assembly, a bearing plate, and a semi-enclosed fixing claw. The lifting assembly is disposed on the main support plate; the bearing plate is disposed on the main support plate and is located above the lifting assembly; the semi-enclosed fixing claw is disposed on the main support plate and is located on the side of the bearing plate opposite to the lifting assembly.
[0011] The lifting assembly includes a lifting assembly and a top column assembly. The lifting assembly is connected to the main support plate, and the top column assembly is rotatably connected to the side of the lifting assembly near the support plate. The support plate is provided with a carrier plate through hole. The support plate is used to place the cylindrical battery to be welded. The lifting assembly is used to drive the top column assembly through the carrier plate through hole to lift the top of the cylindrical battery to be welded into the cover. The semi-enclosed fixing claw is used to abut against the side of the cylindrical battery to be welded.
[0012] Optionally, the top column assembly includes a first column, an elastic element, and a second column. One end of the first column is connected to the lifting assembly, and the other end of the first column is provided with a groove. The elastic element is disposed in the groove of the first column. The inner wall of the groove of the first column abuts against the outer wall of the second column, and both ends of the elastic element abut against the bottom wall of the groove of the first column and the second column, respectively.
[0013] Optionally, a limiting elongated through hole is provided on the side wall of the first column, and a positioning protrusion is provided on the outer wall of the second column, the positioning protrusion being located inside the limiting elongated through hole.
[0014] Optionally, the semi-enclosed fixing claw includes a clamping arm and a roller. The clamping arm is connected to the main support plate, and the roller is connected to the end of the clamping arm away from the main support plate. The outer wall of the roller is used to abut against the side of the cylindrical battery to be welded, and the rotation direction of the roller is consistent with the rotation direction of the cylindrical battery to be welded.
[0015] Optionally, the sealing laser welding device includes a fixed horizontal plate with an opening in the middle. The laser welding unit is connected to the fixed horizontal plate, and the laser emitted by the laser welding unit passes through the fixed horizontal plate and then enters the cover through the laser inlet. The dust removal unit includes a first exhaust pipe and a second exhaust pipe, which are respectively connected to both ends of the fixed horizontal plate. Both the first exhaust pipe and the second exhaust pipe face the cover.
[0016] Compared to existing sealing laser welding devices, the sealing laser welding device of this application features a cover with a protective gas inlet channel and a laser inlet hole on the side wall of the cover. The laser emitted by the laser welding unit can enter the cover through the laser inlet hole to perform laser welding on the cylindrical battery to be welded. The protective gas output unit is connected to the protective gas inlet channel and can input protective gas into the cover, so that the battery to be welded is in a space filled with protective gas during ring welding, avoiding oxidation of the cylindrical battery at the welding position, improving the welding yield, and enhancing the reliability of the sealing laser welding device. Attached Figure Description
[0017] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:
[0018] Figure 1 This is a schematic diagram of a sealing laser welding apparatus according to an embodiment of this application;
[0019] Figure 2 This is a schematic diagram of a cover according to an embodiment of this application;
[0020] Figure 3 This is a cross-sectional schematic diagram of a cover according to an embodiment of this application;
[0021] Figure 4 This is a schematic diagram of a fixed horizontal plate according to an embodiment of this application;
[0022] Figure 5 This is a schematic diagram of a fixing unit according to an embodiment of this application;
[0023] Figure 6 This is a schematic diagram of a top post assembly according to an embodiment of this application.
[0024] Among them, 10 is a sealing laser welding device; 100 is a laser welding unit; 200 is a dust removal unit; 210 is a first exhaust pipe; 220 is a second exhaust pipe; 300 is a fixing unit; 400 is a main support plate; 500 is a lifting assembly; 510 is a lifting assembly; 520 is a top column assembly; 521 is a first column; 522 is a groove; 523 is a limiting elongated through hole; 524 is an elastic element; 525 is a second column; 526 is a positioning protrusion; 6 10. Carrier plate; 611. Carrier plate through hole; 620. Semi-enclosed fixing claw; 621. Clamping arm; 622. Roller; 710. Protective gas output unit; 720. Fixing cross plate; 730. Rotating assembly; 800. Cover; 810. Main side wall; 820. Closing side wall; 830. Protective gas inlet channel; 831. First sub-channel; 832. Second sub-channel; 840. Laser entry hole; 850. Rotation inlet; 860. Battery inlet. Detailed Implementation
[0025] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.
[0026] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.
[0027] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0028] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.
[0030] Figure 1 This is a schematic diagram of a sealing laser welding apparatus according to an embodiment of this application. Figure 2 This is a schematic diagram of a cover according to an embodiment of this application, in conjunction with... Figures 1-2 As shown, this application discloses a sealing laser welding device 10, which is used for welding cylindrical batteries. The sealing laser welding device 10 includes a laser welding unit 100, a dust removal unit 200, and a fixing unit 300. The fixing unit 300 is used to fix the cylindrical battery to be welded. The laser welding unit 100 is used to emit a laser to the welding position of the cylindrical battery to be welded. The dust removal unit 200 is used to absorb the dust generated during welding. Of course, the dust removal unit 200 can also absorb the welding slag generated during the welding process.
[0031] The sealing laser welding device 10 also includes a cover 800 and a protective gas output unit 710. The cover 800 is connected to the fixing unit 300, and a battery inlet 860 is provided at the bottom of the cover 800. A protective gas inlet channel 830 and a laser inlet hole 840 are provided on the side wall of the cover 800.
[0032] The protective gas output unit 710 is connected to the protective gas inlet channel 830. The protective gas output unit 710 is used to input protective gas into the cover 800. The top of the cylindrical battery to be welded extends into the cover 800 from the battery inlet 860. The laser emitted by the laser welding unit 100 enters into the cover 800 from the laser inlet 840.
[0033] In other words, the cover 800 covers the top of the cylindrical battery to be welded, and then the laser emitted by the laser welding unit 100 welds the top of the cylindrical battery to be welded. At the same time as welding, the cylindrical battery to be welded rotates synchronously to complete the sealing of the cylindrical battery to be welded.
[0034] Existing sealing laser welding equipment typically sprays protective gas onto the welding position of the cylindrical battery to prevent oxidation. However, because the cylindrical battery needs to be rotated during welding, and the dust removal unit 200 in the existing sealing laser welding equipment creates negative pressure at the welding point, the protective gas at the welding point is rapidly lost. This results in the previously welded area coming into contact with air after rotation, leading to oxidation.
[0035] Compared to existing sealing laser welding devices, the sealing laser welding device 10 of this application features a cover 800 with a protective gas inlet channel 830 and a laser inlet hole 840 on its side wall. The laser emitted by the laser welding unit 100 can enter the cover 800 through the laser inlet hole 840 to perform laser welding on the cylindrical battery to be welded. The protective gas output unit 710 is connected to the protective gas inlet channel 830 and can input protective gas into the cover 800, so that the battery to be welded is in a space filled with protective gas during ring welding, avoiding oxidation of the cylindrical battery at the welding position, improving the welding yield, and enhancing the reliability of the sealing laser welding device 10.
[0036] The cover 800 includes a main sidewall 810 and a tapering sidewall 820, with the tapering sidewall 820 connected to the main sidewall 810. The protective gas inlet channel 830 and the laser inlet 840 are both located on the main sidewall 810. The end of the tapering sidewall 820 away from the main sidewall 810 forms the battery inlet 860, and the tapering sidewall 820 is inclined towards the axis of the cover 800. Simply put, the tapering sidewall 820 tapers inward, thereby reducing the distance between the tapering sidewall 820 and the cylindrical battery to be welded, making it less likely for air to enter the cover 800.
[0037] Furthermore, to accommodate batteries of different diameters to be welded, the outer wall of the closing sidewall 820 in this application is threadedly connected to the inner wall of the main sidewall 810. For example, when welding cylindrical batteries with larger diameters, the closing sidewall 820 can be unscrewed from the main sidewall 810 and replaced with a closing sidewall 820 of a larger diameter, eliminating the need to replace the entire cover 800 and improving the applicability of the sealing laser welding device 10.
[0038] Figure 3 This is a cross-sectional schematic diagram of a cover according to an embodiment of this application, in conjunction with... Figure 3 As shown, Figure 3The direction indicated by the middle arrow represents the movement direction of part of the protective gas. The protective gas inlet channel 830 includes a first sub-channel 831 and a second sub-channel 832. The first sub-channel 831 and the second sub-channel 832 are respectively arranged on the left and right sides of the main sidewall 810. The first sub-channel 831 and the second sub-channel 832 are both arranged obliquely on the same horizontal plane, and the first sub-channel 831 and the second sub-channel 832 are respectively oriented towards the front and rear sides of the main sidewall 810.
[0039] The existing protective gas output unit 710 is usually coaxially arranged with the laser welding unit 100, that is, the laser emission direction of the laser welding unit 100 is the same as the direction of the protective gas output of the protective gas output unit 710. This will cause welding dust to splash. However, when the protective gas output unit 710 of this application inputs protective gas into the first sub-channel 831 and the second sub-channel 832, the protective gas can rotate within the cover 800 to avoid dust splashing.
[0040] Moreover, by simply controlling the rotation direction of the cylindrical battery to be welded to be opposite to the flow direction of the protective gas within the cover 800, it is possible to prevent welding slag from splashing onto the unwelded areas, thereby improving the welding reliability of the sealing laser welding device 10.
[0041] Figure 4 This is a schematic diagram of a fixed horizontal plate according to an embodiment of this application, in conjunction with... Figure 4 As shown, the sealing laser welding device 10 includes a fixed horizontal plate 720 with an opening in the middle. The laser welding unit 100 is connected to the fixed horizontal plate 720, and the laser emitted by the laser welding unit 100 passes through the fixed horizontal plate 720 and then enters the cover 800 through the laser inlet 840. The dust removal unit 200 includes a first exhaust pipe 210 and a second exhaust pipe 220, which are respectively connected to both ends of the fixed horizontal plate 720. Both the first exhaust pipe 210 and the second exhaust pipe 220 face the cover 800.
[0042] By setting both the first exhaust pipe 210 and the second exhaust pipe 220 to face the cover 800, the welding dust generated is absorbed from both sides simultaneously. Furthermore, the welding slag blown out by the first sub-channel 831 and the second sub-channel 832 is also absorbed, ensuring the cleanliness of the welding position and improving welding reliability. Additionally, the first exhaust pipe 210, the second exhaust pipe 220, and the laser welding unit 100 are all fixed on a fixed horizontal plate 720, eliminating the need for frequent adjustments to the positions of the first exhaust pipe 210 and the second exhaust pipe 220, thus reducing operational difficulty.
[0043] Figure 5 This is a schematic diagram of a fixing unit according to an embodiment of this application, in conjunction with... Figure 5 As shown, the fixing unit 300 includes a main support plate 400, a lifting assembly 500, a bearing plate 610, and a semi-enclosed fixing claw 620. The lifting assembly 500 is disposed on the main support plate 400; the bearing plate 610 is disposed on the main support plate 400 and is located above the lifting assembly 500; the semi-enclosed fixing claw 620 is disposed on the main support plate 400 and is located on the side of the bearing plate 610 opposite to the lifting assembly 500.
[0044] The lifting assembly 500 includes a lifting assembly 510 and a top column assembly 520. The lifting assembly 510 is connected to the main support plate 400, and the top column assembly 520 is rotatably connected to the side of the lifting assembly 510 near the support plate 610. The support plate 610 is provided with a carrier plate through hole 611. The support plate 610 is used to place the cylindrical battery to be welded. The lifting assembly 510 is used to drive the top column assembly 520 through the carrier plate through hole 611 to lift the top of the cylindrical battery to be welded into the cover 800. The semi-enclosed fixing claw 620 is used to abut against the side of the cylindrical battery to be welded.
[0045] The sealing laser welding device 10 further includes a rotating component 730, which is connected to the main support plate 400 and is located on the side of the cover 800 away from the lifting component 500. The top of the cover 800 is provided with a rotation inlet 850, and the rotating component 730 abuts against the top of the battery to be welded through the rotation inlet 850. The rotating component 730 is used to drive the battery to be welded to rotate, and the rotation direction of the rotating component 730 is opposite to the flow direction of the protective gas in the cover 800.
[0046] When welding the cylindrical battery to be welded, the cylindrical battery to be welded is transferred to the carrier plate 610. Then, the lifting assembly 510 drives the top column assembly 520 to pass through the through hole 611 of the carrier plate to lift the top of the cylindrical battery to be welded into the cover 800 and abut against the rotating assembly 730. At this time, the semi-enclosed fixing claw 620 abuts against the side of the cylindrical battery to be welded to prevent the cylindrical battery to be welded from falling. The protective gas output unit 710 inputs protective gas into the cover 800 through the protective gas inlet channel 830. Then, the laser emitted by the laser welding unit 100 enters the cover 800 through the laser inlet hole 840 to weld the cylindrical battery to be welded. At the same time, the rotating assembly 730 rotates to drive the battery to be welded to rotate, thus completing the welding work of the cylindrical battery to be welded.
[0047] The semi-enclosed fixing claw 620 includes a clamping arm 621 and a roller 622. The clamping arm 621 is connected to the main support plate 400, and the roller 622 is connected to the end of the clamping arm 621 away from the main support plate 400. The outer wall of the roller 622 is used to abut against the side of the cylindrical battery to be welded, and the rotation direction of the roller 622 is consistent with the rotation direction of the cylindrical battery to be welded.
[0048] By setting the roller 622, when the cylindrical battery to be welded rotates, the roller 622 can rotate along with it, thereby changing the relative sliding between the cylindrical battery to be welded and the semi-enclosed fixing claw 620 to rolling, thus avoiding wear on the side wall of the cylindrical battery to be welded and causing damage to the cylindrical battery to be welded.
[0049] Figure 6 This is a schematic diagram of a top post assembly according to an embodiment of this application, in conjunction with... Figure 5 and Figure 6 As shown, to avoid damage to the cylindrical battery to be welded, the top column assembly 520 includes a first column 521, an elastic element 524, and a second column 525. One end of the first column 521 is connected to the lifting assembly 510, and the other end of the first column 521 is provided with a groove 522. The elastic element 524 is disposed in the groove 522 of the first column 521. The inner wall of the groove 522 of the first column 521 abuts against the outer wall of the second column 525. The two ends of the elastic element 524 abut against the bottom wall of the groove 522 of the first column 521 and the second column 525, respectively.
[0050] In simple terms, the second column 525 abuts against the bottom of the cylindrical battery to be welded. The lifting assembly 510 drives the top column assembly 520 through the through hole 611 of the carrier plate to lift the top of the cylindrical battery to be welded into the cover 800 and abut against the rotating assembly 730. At the same time, the first column 521 presses down on the elastic member 524 to release the contact stress between the cylindrical battery to be welded and the rotating assembly 730, thereby avoiding damage to the cylindrical battery to be welded.
[0051] Furthermore, a limiting elongated through hole 523 is provided on the side wall of the first column 521, and a positioning protrusion 526 is provided on the outer wall of the second column 525. The positioning protrusion 526 is located within the limiting elongated through hole 523. This is to prevent the second column 525 from detaching from the first column 521. The length direction of the limiting elongated through hole 523 is consistent with the opposite direction of the up-and-down movement of the second column 525.
[0052] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.
[0053] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.
Claims
1. A sealing laser welding device, characterized in that, The sealing laser welding device is used to weld cylindrical batteries. The sealing laser welding device includes a laser welding unit, a dust removal unit, and a fixing unit. The fixing unit is used to fix the cylindrical battery to be welded. The laser welding unit is used to emit laser light to the welding position of the cylindrical battery to be welded. The dust removal unit is used to absorb the dust generated during welding. The sealing laser welding device further includes a cover and a protective gas output unit. The cover is connected to the fixing unit, and a battery inlet is provided at the bottom of the cover. A protective gas inlet channel and a laser inlet are provided on the side wall of the cover. The protective gas output unit is connected to the protective gas inlet channel and is used to input protective gas into the cover. The top of the cylindrical battery to be welded extends into the cover from the battery inlet, and the laser emitted by the laser welding unit enters into the cover from the laser inlet.
2. The sealing laser welding apparatus according to claim 1, characterized in that, The cover includes a main sidewall and a constricted sidewall. The constricted sidewall is connected to the main sidewall. The protective gas inlet channel and the laser inlet are both located on the main sidewall. The end of the constricted sidewall away from the main sidewall forms the battery inlet, and the constricted sidewall is inclined toward the axis of the cover.
3. The sealing laser welding apparatus according to claim 2, characterized in that, The outer wall of the constricted sidewall is connected to the inner wall of the main sidewall by a thread.
4. The sealing laser welding apparatus according to claim 2, characterized in that, The protective gas inlet channel includes a first sub-channel and a second sub-channel, which are respectively located on the left and right sides of the main sidewall. The first and second sub-channels are both obliquely arranged on the same horizontal plane, and the first and second sub-channels are respectively oriented towards the front and rear sides of the main sidewall.
5. The sealing laser welding apparatus according to claim 1, characterized in that, The fixing unit includes a main support plate, a lifting assembly, a bearing plate, and a semi-enclosed fixing claw. The lifting assembly is disposed on the main support plate. The bearing plate is disposed on the main support plate and is located above the lifting assembly. The semi-enclosed fixing claw is disposed on the main support plate and is located on the side of the bearing plate opposite to the lifting assembly. The lifting assembly includes a lifting assembly and a top column assembly. The lifting assembly is connected to the main support plate, and the top column assembly is rotatably connected to the side of the lifting assembly near the support plate. The support plate is provided with a carrier plate through hole. The support plate is used to place the cylindrical battery to be welded. The lifting assembly is used to drive the top column assembly through the carrier plate through hole to lift the top of the cylindrical battery to be welded into the cover. The semi-enclosed fixing claw is used to abut against the side of the cylindrical battery to be welded.
6. The sealing laser welding apparatus according to claim 5, characterized in that, The top column assembly includes a first column, an elastic element, and a second column. One end of the first column is connected to the lifting assembly, and the other end of the first column is provided with a groove. The elastic element is disposed in the groove of the first column. The inner wall of the groove of the first column abuts against the outer wall of the second column. The two ends of the elastic element abut against the bottom wall of the groove of the first column and the second column, respectively.
7. The sealing laser welding apparatus according to claim 6, characterized in that, The first column has a limiting elongated through hole on its side wall, and the second column has a positioning protrusion on its outer wall, the positioning protrusion being located inside the limiting elongated through hole.
8. The sealing laser welding apparatus according to claim 5, characterized in that, The semi-enclosed fixing claw includes a clamping arm and a roller. The clamping arm is connected to the main support plate, and the roller is connected to the end of the clamping arm away from the main support plate. The outer wall of the roller is used to abut against the side of the cylindrical battery to be welded, and the rotation direction of the roller is consistent with the rotation direction of the cylindrical battery to be welded.
9. The sealing laser welding apparatus according to claim 1, characterized in that, The sealing laser welding device includes a fixed horizontal plate with an opening in the middle. The laser welding unit is connected to the fixed horizontal plate, and the laser emitted by the laser welding unit passes through the fixed horizontal plate and then enters the cover through the laser inlet. The dust removal unit includes a first exhaust pipe and a second exhaust pipe, which are respectively connected to both ends of the fixed horizontal plate. Both the first exhaust pipe and the second exhaust pipe face the cover.