Galvanometer welding device for battery pack water cooling plate

Abstract

The galvanometer welding device for the battery pack water cooling plate comprises a bearing fixing base, portal frames are arranged on the two sides of the upper end of the bearing fixing base, lifting devices are arranged on the two sides of the upper ends of the portal frames, and lifting welding lenses are fixedly connected to the positions, fixed to the centers of the upper ends of the lifting devices, above the portal frames. The lifting device is used for controlling the Z-direction lifting effect of the lifting welding lens; the bearing and fixing base comprises a fixing platform, transverse lead screw motor moving devices are arranged on the two sides of the upper end of the fixing platform, longitudinal lead screw motor moving devices are arranged at the upper ends of the transverse lead screw motor moving devices, and dust collection and cooling devices are arranged on the longitudinal lead screw motor moving devices. A clamping welding workbench is arranged in the center of the upper end of the fixed platform. The product has the advantages that the transverse and longitudinal lead screw motor moving device on the bearing and fixing base drives the dust collection and cooling device to horizontally follow, a cooperative mode of vertical movement and horizontal following is formed, the complex welding track of the battery pack water-cooling plate can be tracked in real time, and the precision requirement is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of galvanometer welding, and in particular relates to a galvanometer welding device for a battery pack water cooling plate. Background Art

[0002] With the rapid development of the new energy vehicle industry, battery pack performance is crucial. As a core component of the battery pack's cooling system, the welding quality of the water cooling plate directly impacts the battery's heat dissipation efficiency and service life. Currently, the welding process for battery pack water cooling plates faces numerous technical challenges. Regarding welding precision control, since water cooling plates are typically composed of a cover and base plate, traditional clamping devices only provide simple mechanical fixation and cannot effectively address the issue of surface height differences between the joints. When the surface height difference between the joints exceeds 0.1mm, defects such as weld penetration and cold welds are highly likely to occur during welding, reducing the sealing performance and heat dissipation efficiency of the water cooling plate. Furthermore, thermal stress generated during welding can cause workpiece deformation, further exacerbating welding precision deviations. The design of the cooling and dust removal systems is also flawed. Traditional systems operate independently of each other in cooling gas delivery and fume extraction, making simultaneous operation impossible. This makes the weld area susceptible to oxidation at high temperatures, compromising weld quality. Furthermore, excessive fume accumulation not only contaminates optical lenses, shortens the life of welding equipment, but also poses a health risk to operators. In addition, the existing cooling and dust removal devices are difficult to flexibly adjust according to workpieces of different thicknesses and have poor applicability. Summary of the Invention

[0003] The purpose of the present invention is to achieve cooling and smoke adsorption in the welding area through the coordinated movement of the dust suction and cooling device, so as to avoid deformation or oxidation of the workpiece due to overheating, and to effectively fix the workpiece by clamping the welding workbench and the cylinder rotating downward pressure device to avoid displacement of the workpiece during welding, thereby improving the weld accuracy, and ensuring a smooth welding surface through a precise pressing and positioning device and argon protection, thereby avoiding the problem of welding defects.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: a galvanometer welding device for a battery pack water-cooling plate, comprising a load-bearing fixed base, a gantry is provided on both sides of the upper end of the load-bearing fixed base, a lifting device is provided on both sides of the upper end of the gantry, a lifting welding lens is fixedly connected to the center position of the upper end of the lifting device above the gantry, and the lifting device is used to control the Z-direction lifting effect of the lifting welding lens; the load-bearing fixed base comprises a fixed platform, and transverse screw motor moving devices are provided on both sides of the upper end of the fixed platform, a longitudinal screw motor moving device is provided on the upper end of the transverse screw motor moving device, and the longitudinal screw motor moving device is A dust suction and cooling device is provided on the moving device, and a clamping welding workbench is provided at the center position of the upper end of the fixed platform; the Z-direction lifting of the welding lens is realized by the lifting devices on both sides of the gantry, and the longitudinal and transverse screw motor moving devices on the supporting fixed base are used to form a "welding lens vertical movement + dust suction device horizontal following" collaborative movement mode, which can track the welding trajectory in real time and improve the welding accuracy of complex workpieces. The dust suction and cooling device realizes transverse and longitudinal following through the screw motor moving device, and synchronously blows cooling gas and absorbs smoke during welding to avoid deformation and oxidation of the workpiece caused by high temperature, while reducing the pollution of smoke to the optical lens, ensuring welding quality and equipment life.

[0005] Furthermore, the dust suction and cooling device includes a first screw motor lifting device, and first slide rail slider moving devices are provided on both sides of the first screw motor lifting device. An L-shaped fixing plate is fixedly connected to one side of the upper end of the first slide rail slider moving device, and a dust suction device is fixedly connected to the L-shaped fixing plate. The first screw motor lifting device realizes Z-direction height adjustment of the dust suction device, and the first slide rail slider moving devices on both sides can be fine-tuned in the horizontal position to ensure precise alignment of the dust suction port and the welding point, which is especially suitable for cooling and dust removal needs of workpieces of different thicknesses. The L-shaped fixing plate fixes the dust suction device through the combination of the slide rail slider and the screw motor, which not only ensures the flexibility of movement, but also reduces the shaking during equipment operation through rigid support.

[0006] Furthermore, the dust suction device includes a hollow cooling dust suction column barrel, an inner ring air blowing and cooling cavity is provided on one side of the interior of the hollow cooling dust suction column barrel, an outer ring dust extraction cavity is provided on the adjacent side of the inner ring air blowing and cooling cavity, a trumpet-shaped side wall is provided at the bottom of the inner ring of the hollow cooling dust suction column barrel, a plurality of side wall air blowing and cooling holes are evenly and equidistantly arranged on the trumpet-shaped side wall, a plurality of bottom dust suction holes are evenly and equidistantly arranged in a circle at the bottom of the outer ring dust extraction cavity, inner ring blowing connection holes are provided on both sides of the upper end of the inner ring air blowing and cooling cavity, which is used to connect a hose to blow air into the cavity and cool the welding area through the side wall air blowing and cooling holes, and an outer ring air extraction connection hole is provided on one side wall of the outer ring dust extraction cavity, which is used to connect a hose to blow air into the cavity The air is extracted and the welding area is dusted through the bottom dust suction holes. The inner ring air blowing and cooling cavity forms a diffused airflow through the side wall air blowing and cooling holes to quickly reduce the temperature of the welding area. The outer ring dust extraction cavity absorbs the smoke in a circular shape through the bottom dust suction holes. The two independent cavity designs avoid airflow interference and achieve efficient "cooling-dust removal" synergy. The trumpet-shaped side walls and evenly distributed air blowing holes make the cooling gas cover the welding points in a fan shape, improving the uniformity of cooling. The bottom dust suction holes are arranged in a circular shape to increase the dust extraction area and ensure that the smoke is collected without dead angles. It is especially suitable for metal welding scenarios with high smoke generation. The inner ring blowing connection hole and the outer ring exhaust connection hole are respectively connected to external hoses to support rapid replacement of gas source and dust collection equipment; the cavity structure can be disassembled and cleaned separately to prevent dust accumulation from affecting performance.

[0007] Furthermore, the clamping welding workbench includes a fixed base, an auxiliary fixing device is provided on the upper end of the fixed base, and a welding cover plate pressing and positioning device is provided on the upper end of the auxiliary fixing device; The fixed base includes a first fixed plate, and elastic clips are provided at the four corners of the upper end of the first fixed plate. The upper end of the elastic clips is clipped with a battery pack water cooling plate. The four corners of the upper end of the first fixed plate are provided with a cylinder rotating and pressing device for rotating and pressing down to position the battery pack water cooling plate. The elastic clips first perform a preliminary positioning of the circulating cooling seat, and the cylinder rotating and pressing device then achieves secondary fixation through rigid pressing to avoid displacement of the workpiece during welding, ensure the accuracy of the weld position, and is suitable for high-precision welding scenarios.

[0008] Furthermore, the battery pack water cooling plate includes a cooling base plate, a serpentine liquid circulation groove is provided inside the cooling base plate, a cover plate supporting step is provided at the upper end of the serpentine liquid circulation groove, a serpentine cover plate is placed on the cover plate supporting step, and a liquid circulation inlet and outlet are provided at one side end of the cooling base plate. The serpentine cover plate is spliced ​​with the cover plate supporting step, and the step size height of the cover plate supporting step is greater than the thickness of the serpentine cover plate. The plane drop height of the spliced ​​serpentine cover plate and the cooling base plate is less than 0.1mm, and the plane drop after the cover plate supporting step and the serpentine cover plate are spliced ​​is <0.1mm, ensuring that the welding surface is flat and avoiding defects such as weld penetration and cold welding due to surface undulations.

[0009] Furthermore, the auxiliary fixing device includes two opposing U-shaped fixing rods, the upper ends of the U-shaped fixing rods are provided with fixing rods, the bottoms of both ends of the fixing rods are provided with second screw motor lifting devices, the output ends of the second screw motor lifting devices are provided with fixed shafts, one side of the fixed shaft is fixedly connected to an annular fixing rod, the bottom of the annular fixing rod is provided with a rack, one side of the annular fixing rod is provided with a second slide rail slider moving device, the upper side of the second slide rail slider moving device is provided with a gear rotating motor, the output end of the gear rotating motor is provided with a downward pressing rod, and gears are provided at both ends of the downward pressing rod, which are assembled with the rack. The drive of the gear rotating motor cooperates with the second slide rail slider moving device to complete the longitudinal movement of the downward pressure round rod. The downward pressure round rod has its own bearing and is a self-rotating movable round rod. At the same time, the overall lifting movement of the downward pressure round rod can be completed through the second screw motor lifting device. The downward pressure round rod adjusts the height through the second screw motor lifting device, and cooperates with the gear rotating motor and rack transmission to achieve longitudinal movement. The tail of the serpentine cover plate can be dynamically flattened to prevent the tail from warping due to thermal stress during welding, which is especially suitable for the welding scenario of long strip cover plates. The downward pressure round rod has its own bearing and can rotate to avoid deformation of the cover plate caused by hard extrusion; the second slide rail slider moving device cooperates with the screw motor to achieve uniform pressure application.

[0010] Furthermore, the welding cover plate pressing and positioning device includes two gantry fixing rods that are installed in opposition, and an I-shaped fixed beam is provided at the upper end of the gantry fixing rod, and a longitudinal gear motor moving device is provided on one side of the upper end of the I-shaped fixed beam. A downward pressure cylinder is provided at the four corners of the upper end of the I-shaped fixed beam, and the output ends of the downward pressure cylinders are connected to jet pressure heads. The jet pressure heads are two and separately connected to the four downward pressure cylinders. The downward pressure cylinder drives the jet pressure head to press down to ensure that the cover plate and the base plate fit tightly. The argon nozzle sprays inert gas before welding, and the air is discharged to form a protective air curtain to prevent high-temperature oxidation. It is especially suitable for welding active metals such as aluminum and magnesium, reducing defects such as pores and cracks. The longitudinal screw motor moving device can adjust the position of the I-shaped fixed beam so that the pressing range of the jet pressure head covers workpieces of different sizes.

[0011] Furthermore, the jet pressure attachment head includes a pressing block, which contains an electromagnet inside, which is used to adsorb the serpentine cover plate after pressing down, so that it is on the same horizontal line as the cooling base plate, which helps to flatten the welding surface. A pipe is provided on one side of the pressing block, and an argon inlet hole is provided on one side end of the pipe. A number of argon nozzles are evenly and equidistantly arranged on the pipe. The argon nozzle performs jet treatment on the surface of the battery pack water cooling plate before welding. The electromagnet inside the pressing block adsorbs the cover plate to forcibly eliminate the splicing gap, and cooperates with the plane drop control technology (<0.1mm) to directly adsorb the serpentine cover plate flush with the cooling base plate to ensure the flatness of the welding surface. Argon is evenly sprayed through the pipe and nozzle to form a protective gas layer with a thickness of about 5-10mm in the welding area, isolating oxygen and nitrogen, and reducing the oxidation rate of the weld metal.

[0012] Furthermore, the lifting device includes a screw motor fixing seat, a screw rotating motor is provided on one side of the upper end of the screw motor fixing seat, a transmission shaft is provided at the output end of the screw rotating motor, a screw rod is provided inside the transmission shaft, the top of the screw rod is fixedly connected to a beam, and a third slide rail slider moving device is provided at both ends of the beam, and the beam is driven by the cooperation of the screw rotating motor and the screw rod to combine the third slide rail slider moving device to complete the up and down lifting of the beam, and at the same time drive the overall large-scale movement of the lifting welding lens to meet the focusing problem of processing workpieces at different heights. The screw rotating motor drives the screw rod to drive the beam to move up and down, and the third slide rail slider moving device ensures smooth movement, which can realize vertical stroke adjustment of the welding lens and quickly adapt to workpieces of different heights. The combined transmission accuracy of the screw rod and the slide rail slider reaches 0.05mm, and the two ends of the beam are guided by the third slide rail slider moving device to avoid yaw vibration during lifting and lowering, thereby ensuring the stability of the welding lens focal length.

[0013] Furthermore, the lifting welding lens includes a second fixed plate, the second fixed plate is fixedly connected to the crossbeam, a third screw motor lifting device is fixedly connected to one side of the second fixed plate, and a galvanometer welding head is fixedly connected to one side end of the third screw motor lifting device. The third screw motor lifting device can complete the Z-direction fine-tuning of the galvanometer welding head. The third screw motor lifting device can fine-tune the galvanometer welding head by 0.01-1mm, and can realize precise calibration of the laser focal length on the basis of large-stroke lifting, meeting the micron-level welding accuracy requirements.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The Z-axis elevation of the welding lens is controlled by lifting devices on both sides of the gantry. The horizontal and vertical screw motors on the fixed support base drive the dust collection and cooling device to follow horizontally, forming a "vertical motion + horizontal tracking" collaborative mode. This allows real-time tracking of the complex welding trajectory of the battery pack water cooling plate, with a transmission accuracy of 0.05mm, ensuring weld position deviation of less than 0.1mm, meeting the high-precision requirements of water cooling plate microchannel welding. 2. The dust collection device adopts an independent design of the inner ring air blowing cooling chamber and the outer ring dust extraction chamber. The cooling gas passes through the blowing holes on the trumpet-shaped side wall in a fan-shaped manner to cover the welding area, causing the temperature of the welding point to drop sharply, avoiding thermal deformation of the water-cooled plate material. At the same time, the annular dust collection holes simultaneously absorb smoke and dust, greatly improving the dust removal efficiency, preventing smoke and dust from contaminating the galvanometer lens, and ensuring laser focusing accuracy. 3. The fixed base achieves dual fixation of the water cooling plate through elastic clips and a cylinder rotating downward pressure device. The downward pressure rod of the auxiliary fixing device dynamically flattens the tail of the serpentine cover plate. Combined with the electromagnet adsorption and cylinder downward pressure of the welding cover plate pressing and positioning device, the height difference between the cover plate and the base plate is less than 0.1mm, eliminating the displacement or warping of the workpiece during welding and ensuring a uniform and continuous weld. 4. The jet pressure head has a built-in argon nozzle. Before welding, argon is sprayed on the surface of the water-cooling plate to form a 5-10mm protective gas layer, which reduces the oxygen concentration in the weld area, effectively prevents oxidation of the aluminum alloy, reduces defects such as pores and cracks, and increases the tensile strength of the weld by more than 20%, meeting the pressure-resistant sealing requirements of the battery pack water-cooling plate. 5. Each functional module, such as the lifting welding lens, dust collection and cooling device, and clamping welding workbench, is independently assembled and connected through a standardized interface between the lead screw motor and the slide rail slider, allowing for quick adaptation to battery pack water cooling plates of different sizes. The cavity structure is also removable for cleaning, reducing the maintenance and replacement time of key components to less than 30 minutes, thus reducing equipment downtime costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the present invention; Figure 2 This is a schematic diagram of the load-bearing fixed base of the present invention; Figure 3 Schematic diagram of the dust collection and cooling device of the present invention; Figure 4 is a schematic diagram of a dust collecting device according to the present invention; Figure 5 This is a schematic diagram of a clamping welding workbench according to the present invention; Figure 6 It is a schematic diagram of the fixed base of the present invention; Figure 7 This is a schematic diagram of the battery pack water cooling plate of the present invention; Figure 8 is a schematic diagram of the auxiliary fixing device of the present invention; Figure 9 This is a schematic diagram of the welding cover plate pressing and positioning device of the present invention; Figure 10 This is a schematic diagram of the air jet pressure attachment head of the present invention; Figure 11 Schematic diagram of the lifting device of the present invention.

[0016] Figure 12 It is a schematic diagram of the lifting welding lens of the present invention.

[0017] In the figure: 1-bearing fixed base, 2-gantry, 3-lifting device, 4-lifting welding lens, 11-fixed platform, 12-longitudinal screw motor moving device, 13-transverse screw motor moving device, 14-dust suction and cooling device, 141-first screw motor lifting device, 142-first slide rail slider moving device, 143-L-shaped fixed plate, 144-dust suction device, 1441-hollow cooling dust suction column barrel, 1442-inner ring air blowing and cooling cavity, 1443-outer ring dust suction cavity, 1444- trumpet-shaped side wall, 1445- side wall air blowing and cooling hole, 1446- bottom dust suction hole, 1447- inner ring air blowing connection hole, 1448- outer ring exhaust connection hole, 15- clamping welding workbench, 151- fixed base, 1511- first fixed plate, 1512- elastic clip, 1513- battery pack water cooling plate, 15131- cooling bottom plate, 15132- serpentine liquid circulation groove, 15133- cover plate bearing step, 15134- serpentine cover plate, 15135- Liquid circulation inlet and outlet, 1514-cylinder rotation and pressing device, 152-auxiliary fixing device, 1521-U-shaped fixing rod, 1522-fixing rod, 1523-second screw motor lifting device, 1524-fixed shaft, 1525-annular fixing rod, 1526-rack, 1527-second slide rail slider moving device, 1528-gear rotation motor, 1529-pressing round rod, 153-welding cover plate pressing and positioning device, 1531-gantry fixing rod, 1532-I-shaped Fixed crossbeam, 1533-longitudinal gear motor moving device, 1534-downward pressure cylinder, 1535-jet pressure attachment, 15351-downward pressure block, 15352-pipeline, 15353-argon inlet hole, 15354-argon nozzle, 31-screw motor fixing seat, 32-screw rotating motor, 33-transmission shaft, 34-screw, 35-crossbeam, 36-third slide rail slider moving device, 41-second fixed plate, 42-third screw motor lifting device, 43-galvanometer welding head. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] Combine Figure 1 As shown, a galvanometer welding device for a battery pack water-cooling plate comprises a bearing fixed base 1, a gantry 2 is provided on both sides of the upper end of the bearing fixed base 1, a lifting device 3 is provided on both sides of the upper end of the gantry 2, a lifting welding lens 4 is fixedly connected to the center position of the upper end of the lifting device 3 above the gantry 2, and the lifting device 3 is used to control the Z-direction lifting effect of the lifting welding lens 4; the bearing fixed base 1 comprises a fixed platform 11, a longitudinal screw motor moving device 12 is provided on both sides of the upper end of the fixed platform 11, a transverse screw motor moving device 13 is provided on the upper end of the longitudinal screw motor moving device 12, and a suction Dust cooling device 14, a clamping welding workbench 15 is set at the center of the upper end of the fixed platform 11; the Z-axis lifting and lowering of the welding lens is achieved through the lifting devices on both sides of the gantry, and the longitudinal and transverse screw motor moving devices on the load-bearing fixed base form a "welding lens vertical movement + dust collection device horizontal follow" collaborative movement mode, which can track the welding trajectory in real time and improve the welding accuracy of complex workpieces. The dust collection and cooling device achieves transverse and longitudinal follow-up through the screw motor moving device, and simultaneously blows cooling gas and absorbs smoke during welding to avoid workpiece deformation and oxidation caused by high temperature, while reducing smoke pollution to the optical lens, ensuring welding quality and equipment life; Combine Figure 2-Figure 12 As shown, the dust suction and cooling device 14 includes a first screw motor lifting device 141, and first slide rail slider moving devices 142 are provided on both sides of the first screw motor lifting device 141. An L-shaped fixing plate 143 is fixedly connected to one side of the upper end of the first slide rail slider moving device 142, and a dust suction device 144 is fixedly connected to the L-shaped fixing plate 143. The first screw motor lifting device realizes Z-direction height adjustment of the dust suction device, and the first slide rail slider moving devices on both sides can be fine-tuned in the horizontal position to ensure precise alignment of the dust suction port and the welding point, which is particularly suitable for cooling and dust removal needs of workpieces of different thicknesses. The L-shaped fixing plate fixes the dust suction device through the combination of the slide rail slider and the screw motor, which not only ensures the flexibility of movement, but also reduces the shaking during equipment operation through rigid support.

[0021] The dust collection device 144 includes a hollow cooling dust collection column barrel 1441, an inner ring air blowing and cooling cavity 1442 is provided on one side of the hollow cooling dust collection column barrel 1441, an outer ring dust extraction cavity 1443 is provided on the adjacent side of the inner ring air blowing and cooling cavity 1442, a trumpet-shaped side wall 1444 is provided on the inner bottom of the hollow cooling dust collection column barrel 1441, a plurality of side wall air blowing and cooling holes 1445 are evenly and equidistantly arranged on the trumpet-shaped side wall 1444, a plurality of bottom dust extraction holes 1446 are evenly and equidistantly arranged on the bottom of the outer ring dust extraction cavity 1443, inner ring air blowing connection holes 1447 are provided on both sides of the upper end of the inner ring air blowing and cooling cavity 1442, which are used to connect a hose to blow air into the cavity and cool the welding area through the side wall air blowing and cooling holes 1445, and an outer ring dust extraction cavity 1443 is provided on one side wall. The air connection hole 1448 is used to connect the hose to exhaust the air in the cavity and to exhaust the dust in the welding area through the bottom dust suction hole 1446. The inner circle air blowing and cooling cavity forms a diffuse airflow through the side wall air blowing and cooling holes to quickly reduce the temperature of the welding area. The outer circle dust extraction cavity absorbs the smoke in a circular shape through the bottom dust suction hole. The two independent cavity designs avoid airflow interference and realize efficient "cooling-dust removal" synergy. The trumpet-shaped side wall and the evenly distributed air holes make the cooling gas cover the welding point in a fan shape, thereby improving the uniformity of cooling; the bottom dust suction holes are arranged in a circular shape to increase the dust extraction area and ensure that the smoke is collected without dead angles, which is especially suitable for metal welding scenarios with high smoke generation. The inner circle air blowing connection hole and the outer circle air extraction connection hole are respectively connected to external hoses to support rapid replacement of gas source and dust collection equipment; the cavity structure can be disassembled and cleaned separately to prevent dust accumulation from affecting performance.

[0022] The clamping welding workbench 15 includes a fixed base 151, an auxiliary fixing device 152 is provided on the upper end of the fixed base 151, and a welding cover plate pressing and positioning device 153 is provided on the upper end of the auxiliary fixing device 152; The fixed base 151 includes a first fixed plate 1511, and elastic clips 1512 are provided at the four corners of the upper end of the first fixed plate 1511. The upper end of the elastic clips 1512 is clipped with a battery pack water cooling plate 1513. The four corners of the upper end of the first fixed plate 1511 are provided with a cylinder rotating and pressing device 1514, which is used to rotate and press down to position the battery pack water cooling plate 1513. The elastic clips first perform a preliminary positioning of the circulating cooling seat, and the cylinder rotating and pressing device then achieves secondary fixation through rigid downward pressure to avoid displacement of the workpiece during welding, ensure the accuracy of the weld position, and is suitable for high-precision welding scenarios.

[0023] The battery pack water-cooling plate 1513 includes a cooling base plate 15131, a serpentine liquid circulation groove 15132 is arranged inside the cooling base plate 15131, a cover plate supporting step 15133 is arranged on the upper end of the serpentine liquid circulation groove 15132, a serpentine cover plate 15134 is placed on the cover plate supporting step 15133, and a liquid circulation inlet and outlet 15135 is arranged on one side end of the cooling base plate 15131. The serpentine cover plate 15134 and the cover plate supporting step 15133 are spliced ​​together, and the step size height of the cover plate supporting step 15133 is greater than the thickness of the serpentine cover plate 15134. The plane drop height between the spliced ​​serpentine cover plate 15134 and the cooling base plate 15131 is less than 0.1mm, and the plane drop after the cover plate supporting step and the serpentine cover plate are spliced ​​is less than 0.1mm, ensuring that the welding surface is flat and avoiding defects such as welding through and cold welding due to surface undulations.

[0024] The auxiliary fixing device 152 includes two opposing U-shaped fixing rods 1521, each of which is provided with a fixing rod 1522 at the upper end of the U-shaped fixing rod 1521, and a second screw motor lifting device 1523 is provided at the bottom of each end of the fixing rod 1522. The output end of the second screw motor lifting device 1523 is provided with a fixed shaft 1524, and one side of the fixed shaft 1524 is fixedly connected to an annular fixing rod 1525, and a rack 1526 is provided at the bottom of the annular fixing rod 1525. A second slide rail slider moving device 1527 is provided on one side of the annular fixing rod 1525, and a gear rotating motor 1528 is provided on one side of the second slide rail slider moving device 1527. A downward pressing rod 1529 is provided at the output end of the gear rotating motor 1528, and a gear is provided at both ends of the downward pressing rod 1529. They are all assembled with the rack 1526, and at the same time, the longitudinal movement of the downward pressure rod 1529 is completed through the drive of the gear rotation motor 1528 and the second slide rail slider moving device 1527. The downward pressure rod 1529 has its own bearing and is a self-rotating movable rod. At the same time, the overall lifting and lowering movement of the downward pressure rod 1529 can be completed through the second screw motor lifting device 1523. The height of the downward pressure rod is adjusted by the second screw motor lifting device, and the longitudinal movement is achieved by cooperating with the gear rotation motor and the rack transmission. The tail of the serpentine cover can be dynamically flattened to prevent the tail from tilting due to thermal stress during welding. It is especially suitable for welding scenarios of long strip covers. The downward pressure rod has its own bearing and can rotate by itself to avoid deformation of the cover due to hard extrusion; the second slide rail slider moving device cooperates with the screw motor to achieve uniform pressure application.

[0025] The welding cover plate pressing and positioning device 153 includes two gantry fixing rods 1531 that are mounted in opposition. An I-shaped fixing beam 1532 is provided at the upper end of the gantry fixing rod 1531. A longitudinal gear motor moving device 1533 is provided on one side of the upper end of the I-shaped fixing beam 1532. Downward pressure cylinders 1534 are provided at the four corners of the upper end of the I-shaped fixing beam 1532. The output ends of the downward pressure cylinders 1534 are connected to jet pressure heads 1535. The jet pressure heads 1535 are two and separately connected to the four downward pressure cylinders 1534. The downward pressure cylinders drive the jet pressure heads to press down to ensure that the cover plate and the base plate are tightly fitted. The argon nozzle sprays inert gas before welding, and the exhausted air forms a protective gas curtain to prevent high-temperature oxidation. It is particularly suitable for welding active metals such as aluminum and magnesium, reducing defects such as pores and cracks. The longitudinal screw motor moving device can adjust the position of the I-shaped fixing beam so that the pressing range of the jet pressure head covers workpieces of different sizes.

[0026] The jet pressure attachment 1535 includes a pressing block 15351, which contains an electromagnet inside and is used to adsorb the serpentine cover plate 15134 after pressing down, so that it is on the same horizontal line with the cooling base plate 15131, which helps to level the welding surface. A pipe 15352 is provided on one side of the pressing block 15351, and an argon gas inlet hole 15353 is provided on one side of the pipe 15352. A plurality of argon gas nozzles 15353 are evenly and equidistantly arranged on the pipe 15352. 54. The argon nozzle 15354 sprays air on the surface of the battery pack water cooling plate 1513 before welding. The electromagnet inside the lower pressure block adsorbs the cover plate to forcibly eliminate the splicing gap. Combined with the plane drop control technology of <0.1mm, the serpentine cover plate is directly adsorbed to the cooling base plate in a flush state to ensure the flatness of the welding surface. Argon gas is evenly sprayed through the pipe and nozzle to form a protective gas layer with a thickness of about 5-10mm in the welding area, isolating oxygen and nitrogen, and reducing the oxidation rate of the weld metal.

[0027] The lifting device 3 includes a screw motor fixing seat 31, a screw rotating motor 32 is provided on one side of the upper end of the screw motor fixing seat 31, a transmission shaft 33 is provided at the output end of the screw rotating motor 32, a screw shaft 33 is provided inside the transmission shaft 33, and a crossbeam 35 is fixedly connected to the top of the screw rod 34. Both ends of the crossbeam 35 are provided with a third slide rail slider moving device 36. The crossbeam 35 is driven by the cooperation of the screw rotating motor 32 and the screw rod 34 to form the third slide rail slider moving device 36 to complete the up and down lifting of the crossbeam 35, and at the same time drive the overall large-scale movement of the lifting welding lens 4 to meet the focusing problem of workpieces at different heights. The screw rotating motor drives the screw to drive the crossbeam to move up and down, and the third slide rail slider moving device ensures smooth movement, which can realize the vertical stroke adjustment of the welding lens and quickly adapt to workpieces of different heights. The combined transmission accuracy of the screw rod and the slide rail slider reaches 0.05mm, and the two ends of the beam are guided by the third slide rail slider moving device to avoid yaw vibration during lifting and lowering, thereby ensuring the stability of the focal length of the welding lens.

[0028] The lifting welding lens 4 includes a second fixed plate 41, which is fixedly connected to the crossbeam 35. A third screw motor lifting device 42 is fixedly connected to one side of the second fixed plate 41, and a galvanometer welding head 43 is fixedly connected to one side end of the third screw motor lifting device 42. The third screw motor lifting device 42 can complete the Z-direction fine-tuning of the galvanometer welding head 43. The third screw motor lifting device can fine-tune the galvanometer welding head by 0.01-1mm, and can realize precise calibration of the laser focal length on the basis of large-stroke lifting and lowering, meeting the micron-level welding accuracy requirements.

[0029] Working Principle: Initial fixation of the water-cooling plate: Place the battery pack water-cooling plate (the assembly of the cooling base plate and the serpentine cover plate) on the fixed plate of the fixed base. Initial positioning is achieved through the elastic clips at the four corners, which quickly limit the horizontal displacement of the water-cooling plate. The cylinder rotation and pressing device is activated, and the rotation and pressing action applies rigid pressure to the elastic clips to complete the secondary fixation of the water-cooling plate, ensuring that the workpiece does not shake during welding. Dynamic flattening of the cover plate tail: The two U-shaped fixing rods of the auxiliary fixing device are symmetrically distributed on both sides of the water-cooled plate. The height of the annular fixing rods is adjusted by the second screw motor lifting device, so that the downward pressure rod is aligned with the tail of the serpentine cover plate. The gear rotation motor drives the downward pressure rod to move longitudinally along the rack. At the same time, the second slide block moving device cooperates and adjusts. The downward pressure rod rotates on its own bearing to contact the cover plate, avoiding rigid extrusion deformation and dynamically flattening the tail that may be tilted due to thermal stress. Cover plate integral pressing and shielding gas pretreatment: The I-shaped fixed crossbeam of the welding cover plate pressing and positioning device is adjusted in position by the longitudinal screw motor moving device, so that the four downward pressure cylinders drive the air jet pressing head to align with the cover plate surface. The downward pressure cylinder drives the downward pressure block to press down, and the internal electromagnet is energized to attract the serpentine cover plate, forcing it to be flush with the cooling base plate (plane drop <0.1mm). At the same time, argon gas is ejected from the nozzle through the pipe, forming a 5-10mm thick shielding gas layer in the welding area, and the air is exhausted to prevent oxidation. Coarse adjustment of the welding lens height: The rotating motor of the lifting device drives the screw in the transmission shaft to rotate, driving the crossbeam to move up and down through the third slide rail slider moving device, realizing a large range of Z-direction movement of the lifting welding lens, quickly adapting to water-cooled plate workpieces of different heights, and completing coarse focus adjustment; Fine-tuning the focal length of the welding lens: The third screw motor lifting device is started to finely adjust the Z direction of the galvanometer welding head by 0.01-1mm. Combined with the laser ranging feedback, it ensures that the laser focus is accurately positioned on the welding surface to meet the micron-level welding accuracy requirements; Position calibration of the dust collection and cooling device: The horizontal and vertical screw motor moving devices supporting the fixed base work together to drive the dust collection and cooling device to move horizontally, aligning it with the area to be welded. At the same time, the first screw motor lifting device adjusts the Z-axis height of the dust collection device, and cooperates with the first slide rail slider moving devices on both sides to fine-tune the horizontal position to ensure precise control of the distance between the dust collection port and the welding point. Laser welding process: The galvanometer welding head receives the control signal and realizes high-speed scanning of the laser beam through the deflection of the internal galvanometer lens. It passes through the I-shaped fixed beams along the preset trajectory to weld the joint between the serpentine cover plate and the cooling base plate. Real-time cooling and dust removal: The inner ring air blowing and cooling chamber is connected to compressed air or inert gas through the inner ring air blowing connection hole. The gas is ejected in a fan shape through the air blowing and cooling holes on the trumpet-shaped side wall, covering the welding area, so that the temperature of the welding point is quickly reduced, and the water-cooling plate is prevented from being deformed due to high temperature; the outer ring dust extraction chamber is connected to the dust collection equipment through the outer ring air extraction connection hole. The annular dust collection hole at the bottom synchronously absorbs the smoke generated by welding, with a dust removal efficiency of more than 95%, preventing smoke from contaminating the lens or depositing on the workpiece surface. During the welding process, the horizontal and vertical screw motor moving devices drive the dust collection and cooling device to move in real time according to the welding trajectory, keeping the relative position of the dust collection port and the welding point unchanged. The lifting device fine-tunes the height of the welding lens according to the undulations of the workpiece surface to ensure a constant laser focal length. Welding is completed: the electromagnet of the jet pressure head is powered off, the downward pressure cylinder retracts; the downward pressure round rod of the auxiliary fixing device rises, and then the downward pressure welding of the next area is carried out.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A galvanometer welding device for a battery pack water cooling plate, comprising a bearing fixed base (1), characterized in that: The upper end of the bearing fixed base (1) is provided with a gantry (2) on both sides, and the upper end of the gantry (2) is provided with a lifting device (3) on both sides. A lifting welding lens (4) is fixedly connected to the upper center position of the lifting device (3) above the gantry (2), and the lifting device (3) is used to control the Z-direction lifting action of the lifting welding lens (4); the bearing fixed base (1) includes a fixed platform (11), and the upper end of the fixed platform (11) is provided with a longitudinal screw motor moving device (12 ), a transverse screw motor moving device (13) is provided at the upper end of the longitudinal screw motor moving device (12), a dust collection and cooling device (14) is provided on the transverse screw motor moving device (13), a clamping welding workbench (15) is provided at the center position of the upper end of the fixed platform (11), and the combination of the longitudinal screw motor moving device (12) and the transverse screw motor moving device (13) can complete the transverse and longitudinal movement of the dust collection and cooling device (14), cooling and dust collection of the welding area.

2. The galvanometer welding device for a battery pack water cooling plate according to claim 1, characterized in that: The dust collection and cooling device (14) comprises a first screw motor lifting device (141), first slide rail and slider moving devices (142) are provided on both sides of the first screw motor lifting device (141), an L-shaped fixing plate (143) is fixedly connected to one side of the upper end of the first slide rail and slider moving device (142), and a dust collection device (144) is fixedly connected to the L-shaped fixing plate (143).

3. The galvanometer welding device for a battery pack water cooling plate according to claim 2, characterized in that: The dust collecting device (144) includes a hollow cooling dust collecting column barrel (1441), an inner ring air blowing and cooling cavity (1442) is provided on one side of the interior of the hollow cooling dust collecting column barrel (1441), an outer ring dust collecting cavity (1443) is provided on the adjacent side of the inner ring air blowing and cooling cavity (1442), a trumpet-shaped side wall (1444) is provided on the bottom of the inner ring of the hollow cooling dust collecting column barrel (1441), a plurality of side wall air blowing and cooling holes (1445) are evenly and equidistantly arranged on the trumpet-shaped side wall (1444), and the outer ring dust collecting cavity (1443) is provided with a plurality of side wall air blowing and cooling holes (1445) on the inner ring of the hollow cooling dust collecting column barrel (1441). 3) A plurality of bottom dust suction holes (1446) are evenly and equidistantly arranged in a circle on the bottom, and inner circle air blowing connection holes (1447) are provided on both sides of the upper end of the inner circle air blowing and cooling cavity (1442), which are used to connect a hose to blow air into the cavity and cool the welding area through the side wall air blowing and cooling holes (1445), and outer circle air exhaust connection holes (1448) are provided on one side wall of the outer circle dust extraction cavity (1443), which are used to connect a hose to exhaust air from the cavity and exhaust dust from the welding area through the bottom dust suction holes (1446).

4. The galvanometer welding device for a battery pack water cooling plate according to claim 3, characterized in that: The clamping welding workbench (15) comprises a fixed base (151), an auxiliary fixing device (152) is provided at the upper end of the fixed base (151), and a welding cover plate pressing and positioning device (153) is provided at the upper end of the auxiliary fixing device (152); The fixed base (151) includes a first fixed plate (1511), the four corners of the upper end of the first fixed plate (1511) are each provided with an elastic snap-fitting piece (1512), the upper end of the elastic snap-fitting piece (1512) is snap-fitted with a battery pack water cooling plate (1513), and the four corners of the upper end of the first fixed plate (1511) are each provided with a cylinder rotating downward pressing device (1514) for rotating downward pressing to position the battery pack water cooling plate (1513).

5. The galvanometer welding device for a battery pack water cooling plate according to claim 4, characterized in that: The battery pack water cooling plate (1513) includes a cooling base plate (15131), a serpentine liquid circulation groove (15132) is provided inside the cooling base plate (15131), a cover plate supporting step (15133) is provided at the upper end of the serpentine liquid circulation groove (15132), a serpentine cover plate (15134) is placed on the cover plate supporting step (15133), a liquid circulation inlet and outlet (15135) is provided at one side end of the cooling base plate (15131), the serpentine cover plate (15134) and the cover plate supporting step (15133) are spliced ​​together, and the step size height of the cover plate supporting step (15133) is greater than the thickness of the serpentine cover plate (15134), and the plane drop height of the spliced ​​serpentine cover plate (15134) and the cooling base plate (15131) is less than 0.1 mm.

6. The galvanometer welding device for a battery pack water cooling plate according to claim 5, characterized in that: The auxiliary fixing device (152) includes two U-shaped fixing rods (1521) in an opposing shape, the upper end of each U-shaped fixing rod (1521) is provided with a fixing rod (1522), the bottom of each end of each fixing rod (1522) is provided with a second screw motor lifting device (1523), the output end of each second screw motor lifting device (1523) is provided with a fixing shaft (1524), one side of each fixing shaft (1524) is fixedly connected to an annular fixing rod (1525), the bottom of each annular fixing rod (1525) is provided with a rack (1526), ​​one side of each annular fixing rod (1525) is provided with a second slide rail slider moving device (1527), and the upper side of the second slide rail slider moving device (1527) is provided with a gear rotation motor ( 1528), the output end of the gear rotating motor (1528) is provided with a downward pressing rod (1529), and gears are provided at both ends of the downward pressing rod (1529) and are assembled with the rack (1526). At the same time, the longitudinal movement of the downward pressing rod (1529) is completed by the driving of the gear rotating motor (1528) and the second slide rail slider moving device (1527). The downward pressing rod (1529) has its own bearing and is a self-rotating movable rod. At the same time, the overall lifting movement of the downward pressing rod (1529) can be completed by the second screw motor lifting device (1523). The downward pressing rod (1529) can press down the tail of the serpentine cover plate (15134) to ensure that it is in a flat state during welding and avoid the tail from being tilted.

7. The galvanometer welding device for a battery pack water cooling plate according to claim 6, characterized in that: The welding cover plate pressing and positioning device (153) comprises two gantry fixing rods (1531) that are arranged in opposition to each other, an I-shaped fixing beam (1532) being provided at the upper end of the gantry fixing rod (1531), a longitudinal gear motor moving device (1533) being provided at one side of the upper end of the I-shaped fixing beam (1532), downward pressure cylinders (1534) being provided through the four corners of the upper end of the I-shaped fixing beam (1532), the output ends of the downward pressure cylinders (1534) being connected to jet pressure attachment heads (1535), and two jet pressure attachment heads (1535) being separately connected to the four downward pressure cylinders (1534).

8. The galvanometer welding device for a battery pack water cooling plate according to claim 7, characterized in that: The jet pressure attachment head (1535) includes a pressing block (15351), wherein the pressing block (15351) contains an electromagnet for adsorbing the serpentine cover plate (15134) after pressing down, so that it is on the same horizontal line as the cooling base plate (15131), which helps to flatten the welding surface. A pipe (15352) is provided on one side of the pressing block (15351), and an argon inlet hole (15353) is provided on one side end of the pipe (15352). A plurality of argon nozzles (15354) are evenly and equidistantly arranged on the pipe (15352), and the argon nozzles (15354) perform jet treatment on the surface of the battery pack water cooling plate (1513) before welding.

9. The galvanometer welding device for a battery pack water cooling plate according to claim 8, characterized in that: The lifting device (3) includes a screw motor fixing seat (31), a screw rotating motor (32) is provided on one side of the upper end of the screw motor fixing seat (31), a transmission shaft (33) is provided at the output end of the screw rotating motor (32), a screw (34) is provided inside the transmission shaft (33), a crossbeam (35) is fixedly connected to the top of the screw (34), and a third slide rail slider moving device (36) is provided at both ends of the crossbeam (35). The crossbeam (35) can complete the up and down lifting of the crossbeam (35) by driving the third slide rail slider moving device (36) in combination with the screw rotating motor (32) and the screw (34), and at the same time drive the overall large-scale movement of the lifting welding lens (4) to meet the focusing problem of workpieces of different heights.

10. The galvanometer welding device for a battery pack water cooling plate according to claim 9, characterized in that: The lifting welding lens (4) includes a second fixing plate (41), the second fixing plate (41) is fixedly connected to the crossbeam (35), a third screw motor lifting device (42) is fixedly connected to one side of the second fixing plate (41), a galvanometer welding head (43) is fixedly connected to one side end of the third screw motor lifting device (42), and the third screw motor lifting device (42) can complete the Z-direction fine adjustment of the galvanometer welding head (43).

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