A galvanometer welding device for a battery pack water cooling plate

Abstract

This invention discloses a galvanometer welding device for battery pack water-cooled plates, comprising a support base, gantry frames on both sides of the upper end of the support base, lifting devices on both sides of the upper end of the gantry frames, and a lifting welding lens fixedly connected to the center of the upper end of the lifting device. The lifting device controls the Z-axis lifting action of the lifting welding lens. The support base includes a fixed platform, with horizontal lead screw motor moving devices on both sides of the upper end of the fixed platform, and a vertical lead screw motor moving device on the upper end of the horizontal lead screw motor moving device. A dust extraction and cooling device is installed on the vertical lead screw motor moving device, and a clamping welding worktable is installed at the center of the upper end of the fixed platform. Product advantages: The horizontal and vertical lead screw motor moving devices on the support base drive the dust extraction and cooling device to follow horizontally, forming a coordinated mode of vertical movement + horizontal following, which can track the complex welding trajectory of the battery pack water-cooled plate in real time and meet the accuracy requirements.

Description

Technical Field

[0001] This invention belongs to the field of galvanometer welding technology, and particularly relates to a galvanometer welding device for water-cooled plates of battery packs. Background Technology

[0002] In the current era of rapid development in the new energy vehicle industry, the performance of battery packs is crucial. As a core component of the battery pack's heat dissipation system, the welding quality of the water-cooled plate directly affects the battery's heat dissipation efficiency and lifespan. Currently, the welding process for battery pack water-cooled plates faces numerous technical challenges. Regarding welding precision control, since water-cooled plates are typically assembled from a cover plate and a base plate, traditional clamping devices can only achieve simple mechanical fixation and cannot effectively address the issue of unevenness at the splicing surface. When the unevenness exceeds 0.1mm, defects such as burn-through and incomplete welds are prone to occur during welding, reducing the sealing performance and heat dissipation efficiency of the water-cooled plate. Simultaneously, the thermal stress generated during welding can cause workpiece deformation, further exacerbating welding precision deviations. The design of the cooling and dust removal systems also has shortcomings. Traditional devices operate with independent cooling gas blowing and fume adsorption functions, making simultaneous operation impossible. This makes the welding area prone to oxidation at high temperatures, affecting weld quality. Furthermore, the accumulation of large amounts of fume not only contaminates optical lenses and reduces the lifespan of welding equipment but may also harm the health of operators. In addition, existing cooling and dust removal devices are difficult to adjust flexibly according to workpieces of different thicknesses, resulting in poor applicability. Summary of the Invention

[0003] The purpose of this invention is to achieve cooling and fume adsorption in the welding area through a dust extraction and cooling device via coordinated motion, thereby preventing workpiece deformation or oxidation due to overheating. The clamping welding worktable and cylinder rotation and pressing device effectively fix the workpiece, preventing workpiece displacement during welding, thus improving weld accuracy. Through a precise pressure-adhesion positioning device and argon gas protection, the weld surface is ensured to be flat, avoiding welding defects.

[0004] This invention achieves the above objectives through the following technical solution: A galvanometer welding device for a battery pack water-cooled plate includes a supporting fixed base, with gantry frames arranged on both sides of the upper end of the supporting fixed base, and lifting devices arranged on both sides of the upper end of the gantry frames. A lifting welding lens is fixedly connected to the center position of the upper end of each lifting device, and the lifting device is used to control the Z-axis lifting action of the lifting welding lens; the supporting fixed base includes a fixed platform, with transverse lead screw motor moving devices arranged on both sides of the upper end of the fixed platform, and a longitudinal lead screw motor moving device arranged on the upper end of the transverse lead screw motor moving device, and a... Equipped with a dust extraction and cooling device, the fixed platform has a clamping welding worktable at its center. The welding lens is raised and lowered in the Z-axis direction through the lifting devices on both sides of the gantry frame. Combined with the longitudinal and transverse screw motor moving devices on the supporting fixed base, a coordinated motion mode of "vertical movement of the welding lens + horizontal following of the dust extraction device" is formed. This mode can track the welding trajectory in real time, improve the welding accuracy of complex workpieces, and the dust extraction and cooling device achieves transverse and longitudinal following through the screw motor moving device. During welding, it simultaneously blows cooling gas and absorbs fumes, avoiding workpiece deformation and oxidation caused by high temperature, while reducing the pollution of optical lenses by fumes, ensuring welding quality and equipment life.

[0005] Furthermore, the dust collection and cooling device includes a first lead screw motor lifting device. Both sides of the first lead screw motor lifting device are equipped with first slide rail slider moving devices. An L-shaped fixing plate is fixedly connected to one side of the upper end of each first slide rail slider moving device. A dust collection device is fixedly connected to the L-shaped fixing plate. The first lead screw motor lifting device enables Z-axis height adjustment of the dust collection device. The first slide rail slider moving devices on both sides can be finely adjusted horizontally to ensure precise alignment between the dust collection port and the welding point. This is particularly suitable for cooling and dust removal needs of workpieces of different thicknesses. The L-shaped fixing plate, through the combination of the slide rail slider and the lead screw motor, fixes the dust collection device, ensuring both mobility and reducing shaking during equipment operation through rigid support.

[0006] Furthermore, the dust collection device includes a hollow cooling dust collection column. An inner ring air-blowing and cooling chamber is located on one side of the hollow cooling dust collection column. An outer ring dust collection chamber is located adjacent to the inner ring air-blowing and cooling chamber. A trumpet-shaped sidewall is located at the bottom of the inner ring of the hollow cooling dust collection column. A plurality of sidewall air-blowing and cooling holes are evenly and equidistantly arranged on the trumpet-shaped sidewall. A plurality of bottom suction holes are evenly and equidistantly arranged around the bottom of the outer ring dust collection chamber. Inner ring air-blowing connection holes are located on both sides of the upper end of the inner ring air-blowing and cooling chamber for connecting a flexible hose to blow air into the chamber and cooling the welded area through the sidewall air-blowing and cooling holes. An outer ring suction connection hole is located on one side wall of the outer ring dust collection chamber for connecting a flexible hose to blow air into the chamber. The system extracts air and removes dust from the welding area through the bottom suction port. The inner ring air-blowing cooling chamber forms a diffused airflow through the side wall air-blowing cooling holes, quickly reducing the temperature of the welding area. The outer ring dust extraction chamber uses the bottom suction port to adsorb fumes in a ring shape. The independent chamber design of the two avoids airflow interference, achieving efficient synergy between cooling and dust removal. The trumpet-shaped sidewalls and evenly distributed air-blowing holes allow the cooling gas to cover the welding point in a fan shape, improving the uniformity of cooling. The ring arrangement of the bottom suction ports increases the dust extraction area, ensuring that fumes are collected without dead corners. It is especially suitable for metal welding scenarios with high fumes. The inner ring air-blowing connection port and the outer ring air extraction connection port are respectively connected to external hoses, supporting quick replacement of air source and dust extraction equipment. The chamber 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.

[0008] The fixed base includes a first fixed plate, with elastic buckles at each of the four corners of the upper end of the first fixed plate. A battery pack water-cooling plate is attached to the upper end of each elastic buckle. A cylinder rotation and pressing device is also provided at each of the four corners of the upper end of the first fixed plate for rotating and pressing down to position the battery pack water-cooling plate. The elastic buckles first perform initial positioning of the circulating cooling base, and the cylinder rotation and pressing device then achieves secondary fixation through rigid pressing, avoiding workpiece displacement during welding, ensuring weld position accuracy, and is suitable for high-precision welding scenarios.

[0009] Furthermore, the battery pack water-cooling plate includes a cooling base plate, inside which a serpentine liquid circulation tank is provided. A cover plate supporting step is provided at the upper end of the serpentine liquid circulation tank, and a serpentine cover plate is placed on the cover plate supporting step. A liquid circulation inlet and outlet are provided on one side of the cooling base plate. The serpentine cover plate is spliced ​​with the cover plate supporting step, and the step height of the cover plate supporting step is greater than the thickness of the serpentine cover plate. The height difference between the spliced ​​serpentine cover plate and the cooling base plate is less than 0.1 mm. The height difference between the spliced ​​cover plate supporting step and the serpentine cover plate is <0.1 mm, ensuring a flat welding surface and avoiding defects such as burn-through and incomplete welding caused by surface undulations.

[0010] Furthermore, the auxiliary fixing device includes two opposing U-shaped fixing rods. Each U-shaped fixing rod has a fixing rod at its upper end, and a second lead screw motor lifting device is located at the bottom of each end of the fixing rod. A fixed shaft is located at the output end of each second lead screw motor lifting device, and an annular fixing rod is fixedly connected to one side of each fixed shaft. A rack is located at the bottom of each annular fixing rod, and a second slide rail slider moving device is located on one side of each annular fixing rod. A gear-driven motor is located on one side of the second slide rail slider moving device, and a downward-pressing round rod is located at the output end of the gear-driven motor. Gears are located at both ends of the downward-pressing round rod and are connected to… The rack and pinion assembly, driven by the gear-driven motor and the second slide rail slider moving device, completes the longitudinal movement of the pressing rod. The pressing rod, equipped with its own bearing, is a self-rotating movable rod. The second screw motor lifting device enables the overall lifting and lowering of the pressing rod. The pressing rod presses down on the tail of the serpentine cover plate, ensuring it remains flat during welding and preventing the tail from lifting up. This is particularly suitable for welding long, narrow cover plates. The self-rotating bearing of the pressing rod prevents deformation of the cover plate due to excessive pressure. The second slide rail slider moving device, in conjunction with the screw motor, ensures uniform pressure application.

[0011] Furthermore, the welding cover plate pressing and positioning device includes two opposing gantry fixing rods. An I-shaped fixing beam is installed at the upper end of each gantry fixing rod. A longitudinal gear motor moving device is installed on one side of the upper end of the I-shaped fixing beam. A downward pressing cylinder is installed through each of the four corners of the upper end of the I-shaped fixing beam. Each downward pressing cylinder's output end is connected to a jet pressing head. There are two jet pressing heads, which are separately connected to the four downward pressing cylinders. The downward pressing cylinders drive the jet pressing heads downwards, ensuring a tight fit between the cover plate and the base plate. Before welding, an argon nozzle sprays inert gas, expelling air to form a protective gas curtain, preventing high-temperature oxidation. This is particularly suitable for welding reactive metals such as aluminum and magnesium, reducing defects such as porosity and cracks. The longitudinal screw motor moving device can adjust the position of the I-shaped fixing beam, allowing the pressing range of the jet pressing head to cover workpieces of different sizes.

[0012] Furthermore, the jet attachment head includes a pressing block containing an electromagnet for pressing down and adsorbing the serpentine cover plate, bringing it to the same horizontal level as the cooling base plate, which helps to ensure the flatness of the welding surface. A pipe is provided on one side of the pressing block, and an argon gas inlet is provided on one end of the pipe. Several argon gas nozzles are evenly and equidistantly arranged on the pipe. The argon gas nozzles spray the surface of the battery pack water-cooling plate before welding. The electromagnet inside the pressing block adsorbs the cover plate, forcibly eliminating the splicing gap. Combined with the plane drop control technology (<0.1mm), the serpentine cover plate is directly adsorbed and placed flush with the cooling base plate, ensuring the flatness of the welding surface. Argon gas is evenly sprayed out through the pipe and nozzles, forming a protective gas layer of about 5-10mm thickness in the welding area, isolating oxygen and nitrogen, and reducing the oxidation rate of the weld metal.

[0013] Furthermore, the lifting device includes a lead screw motor mounting base, a lead screw rotating motor is mounted on one side of the upper end of the lead screw motor mounting base, a transmission shaft is mounted on the output end of the lead screw rotating motor, a lead screw is mounted inside the transmission shaft, a crossbeam is fixedly connected to the top of the lead screw, and a third slide rail slider moving device is mounted on both ends of the crossbeam. The crossbeam can be lifted up and down by the cooperation of the lead screw rotating motor and the lead screw with the third slide rail slider moving device, and at the same time, it drives the overall large-scale movement of the lifting welding lens to meet the focusing problem of workpieces of different heights. The lead screw rotating motor drives the lead screw to move the crossbeam up and down, and the third slide rail slider moving device ensures smooth movement. It can realize the vertical stroke adjustment of the welding lens, quickly adapt to workpieces of different heights. The combined transmission accuracy of the lead screw and slide rail slider is 0.05mm, and the two ends of the crossbeam are guided by the third slide rail slider moving device to avoid swaying vibration during lifting and ensuring the stability of the focal length of the welding lens.

[0014] Furthermore, the lifting welding lens includes a second fixed plate, which is fixedly connected to the crossbeam. A third lead 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 of the third lead screw motor lifting device. The third lead screw motor lifting device can perform Z-axis fine adjustment of the galvanometer welding head. The third lead screw motor lifting device can perform 0.01-1mm fine adjustment of the galvanometer welding head, which can achieve precise calibration of the laser focal length on the basis of large stroke lifting, meeting the micron-level welding accuracy requirements.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The welding lens is raised and lowered in the Z direction by the lifting devices on both sides of the gantry frame. Combined with the horizontal and vertical screw motor moving devices on the bearing fixed base, the dust collection and cooling device is driven to follow horizontally, forming a coordinated mode of "vertical movement + horizontal following". It can track the complex welding trajectory of the battery pack water-cooled plate in real time, with a transmission accuracy of 0.05mm, ensuring that the weld position deviation is less than 0.1mm, which meets the high precision requirements of microchannel welding of water-cooled plate.

[0017] 2. The dust collection device adopts an independent design of the inner ring blowing cooling chamber and the outer ring dust collection chamber. The cooling gas covers the welding area in a fan shape through the blowing holes on the trumpet-shaped side wall, so that the temperature of the welding point drops sharply and avoids thermal deformation of the water-cooled plate material. At the same time, the annular dust collection hole simultaneously adsorbs the smoke and dust, greatly improving the dust removal efficiency, preventing smoke and dust from contaminating the galvanometer lens, and ensuring the laser focusing accuracy.

[0018] 3. The fixed base achieves double fixation of the water-cooled plate through elastic buckles and cylinder rotation pressing device. The pressing round rod of the auxiliary fixing device dynamically flattens the tail of the serpentine cover plate. Combined with the electromagnet adsorption of the welding cover plate pressing and positioning device and the cylinder pressing, the height difference between the splicing plane of the cover plate and the base plate is <0.1mm, which prevents workpiece displacement or warping during welding and ensures uniform and continuous weld.

[0019] 4. The jet pressure head has a built-in argon nozzle. Before welding, argon gas is sprayed onto the surface of the water-cooled plate to form a 5-10mm protective gas layer, which reduces the oxygen concentration in the weld area, effectively prevents aluminum alloy oxidation, reduces defects such as porosity and cracks, and increases the tensile strength of the weld by more than 20%, meeting the pressure resistance and sealing requirements of the battery pack water-cooled plate.

[0020] 5. Each functional module, such as the lifting welding lens, dust extraction and cooling device, and clamping welding worktable, is assembled independently and connected through a standardized interface between the lead screw motor and the slide rail slider, which can quickly adapt to water-cooled plates of different sizes of battery packs; at the same time, the cavity structure can be disassembled and cleaned, and the maintenance and replacement time of key components is shortened to less than 30 minutes, reducing equipment downtime costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the support and fixing base of the present invention;

[0023] Figure 3 This is a schematic diagram of the dust collection and cooling device of the present invention;

[0024] Figure 4 This is a schematic diagram of the dust collection device of the present invention;

[0025] Figure 5 This is a schematic diagram of the clamping and welding worktable of the present invention;

[0026] Figure 6 This is a schematic diagram of the fixed base of the present invention;

[0027] Figure 7 This is a schematic diagram of the water-cooled plate of the battery pack of the present invention;

[0028] Figure 8 This is a schematic diagram of the auxiliary fixing device of the present invention;

[0029] Figure 9 This is a schematic diagram of the welding cover plate pressing and positioning device of the present invention;

[0030] Figure 10 This is a schematic diagram of the jet pressure head of the present invention;

[0031] Figure 11 This is a schematic diagram of the lifting device of the present invention;

[0032] Figure 12 This is a schematic diagram of the lifting welding lens of the present invention.

[0033] In the diagram: 1-Supporting fixed base, 2-Gantry frame, 3-Lifting device, 4-Lifting welding lens, 11-Fixed platform, 12-Longitudinal screw motor moving device, 13-Transverse screw motor moving device, 14-Dust collection and cooling device, 141-First screw motor lifting device, 142-First slide rail slider moving device, 143-L-shaped fixed plate, 144-Dust collection device, 1441-Hollow cooling dust collection column, 1442-Inner ring air blowing cooling cavity, 1443-Outer ring dust collection cavity. 1444-Flare-shaped sidewall, 1445-Sidewall air blowing and cooling hole, 1446-Bottom dust suction hole, 1447-Inner ring air blowing connection hole, 1448-Outer ring air extraction connection hole, 15-Clamping welding workbench, 151-Fixed base, 1511-First fixing plate, 1512-Elastic buckle, 1513-Battery pack water cooling plate, 15131-Cooling base plate, 15132-Serpentine liquid circulation tank, 15133-Cover plate bearing step, 15134-Serpentine cover plate, 15135- Liquid circulation inlet / outlet, 1514-cylinder rotation and downward pressing device, 152-auxiliary fixing device, 1521-U-shaped fixing rod, 1522-fixed rod, 1523-second lead screw motor lifting device, 1524-fixed shaft, 1525-ring fixing rod, 1526-rack, 1527-second slide rail slider moving device, 1528-gear rotation motor, 1529-downward pressing round rod, 153-welded cover plate pressing and positioning device, 1531-gantry fixing rod, 1532-I-shaped Fixed crossbeam, 1533-Longitudinal gear motor moving device, 1534-Pressing cylinder, 1535-Air jet pressure head, 15351-Pressing block, 15352-Pipe, 15353-Argon gas inlet hole, 15354-Argon gas nozzle, 31-Screw motor fixing seat, 32-Screw rotating motor, 33-Drive 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 Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply 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 invention.

[0036] Combination Figure 1 As shown, a galvanometer welding device for a battery pack water-cooled plate includes a support base 1. A gantry frame 2 is mounted on both sides of the upper end of the support base 1. A lifting device 3 is mounted on both sides of the upper end of the gantry frame 2. A lifting welding lens 4 is fixedly connected to the center of the upper end of each lifting device 3. The lifting device 3 controls the Z-axis lifting motion of the lifting welding lens 4. The support base 1 includes a fixed platform 11. A longitudinal lead screw motor moving device 12 is mounted on both sides of the upper end of the fixed platform 11. A transverse lead screw motor moving device 13 is mounted on the upper end of the longitudinal lead screw motor moving device 12. A [missing information - likely a device name or function] is mounted on the transverse lead screw motor moving device 13. The dust extraction and cooling device 14 has a welding worktable 15 clamped at the center of the upper end of the fixed platform 11. The welding lens is lifted in the Z direction by the lifting devices on both sides of the gantry frame. Together with the longitudinal and transverse screw motor moving devices on the fixed base, a coordinated motion mode of "vertical movement of welding lens + horizontal following of dust extraction device" is formed. It can track the welding trajectory in real time, improve the welding accuracy of complex workpieces, and the dust extraction and cooling device achieves transverse and longitudinal following through the screw motor moving device. During welding, it blows cooling gas and absorbs fumes simultaneously to avoid workpiece deformation and oxidation caused by high temperature, while reducing the pollution of optical lens by fumes and ensuring welding quality and equipment life.

[0037] Combination Figures 2-12 As shown, the dust collection and cooling device 14 includes a first lead screw motor lifting device 141. Both sides of the first lead screw motor lifting device 141 are provided with first slide rail slider moving devices 142. 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. A dust collection device 144 is fixedly connected to the L-shaped fixing plate 143. The first lead screw motor lifting device enables Z-axis height adjustment of the dust collection device. The first slide rail slider moving devices on both sides can be finely adjusted in horizontal position to ensure precise alignment of the dust collection port with the welding point. This is particularly suitable for cooling and dust removal needs of workpieces of different thicknesses. The L-shaped fixing plate, through the combination of the slide rail slider and the lead screw motor, fixes the dust collection device, ensuring both mobility and reducing shaking during equipment operation through rigid support.

[0038] The dust collection device 144 includes a hollow cooling dust collection column 1441. An inner ring air-blowing cooling chamber 1442 is located on one side of the inner ring air-blowing cooling chamber 1442. An outer ring dust collection chamber 1443 is located adjacent to the inner ring air-blowing cooling chamber 1442 on one side. A trumpet-shaped sidewall 1444 is located at the bottom of the inner ring of the hollow cooling dust collection column 1441. Several sidewall air-blowing cooling holes 1445 are evenly and equidistantly arranged on the trumpet-shaped sidewall 1444. Several bottom dust collection holes 1446 are evenly and equidistantly arranged around the bottom of the outer ring dust collection chamber 1443. Inner ring air-blowing connection holes 1447 are located on both sides of the upper end of the inner ring air-blowing cooling chamber 1442, used to connect a flexible hose to blow air into the chamber and cool the welding area through the sidewall air-blowing cooling holes 1445. An outer ring dust collection chamber 1443 has an outer ring dust collection hole on one side wall. The air connection hole 1448 is used to connect a flexible hose to draw air from the cavity and to remove dust from the welding area through the bottom dust suction hole 1446. The inner ring air blowing cooling cavity forms a diffused airflow through the side wall air blowing cooling holes to quickly reduce the temperature of the welding area. The outer ring dust suction cavity adsorbs fumes in a ring through the bottom dust suction hole. The independent cavity design of the two avoids airflow interference and achieves efficient "cooling-dust removal" synergy. The trumpet-shaped side wall and evenly distributed air blowing holes allow the cooling gas to cover the welding point in a fan shape, improving the uniformity of cooling. The ring arrangement of the bottom dust suction holes increases the dust collection area and ensures that fumes are collected without dead corners, which is especially suitable for metal welding scenarios with high fume generation. The inner ring air blowing connection hole and the outer ring air suction connection hole are respectively connected to the external flexible hose, which supports quick replacement of air source and dust collection equipment. The cavity structure can be disassembled and cleaned separately to prevent dust accumulation from affecting performance.

[0039] 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.

[0040] The fixed base 151 includes a first fixed plate 1511. Each of the four corners of the upper end of the first fixed plate 1511 is provided with an elastic buckle 1512. The upper end of the elastic buckle 1512 is provided with a battery pack water cooling plate 1513. Each of the four corners of the upper end of the first fixed plate 1511 is provided with a cylinder rotation and pressing device 1514 for rotating and pressing down to position the battery pack water cooling plate 1513. The elastic buckle first performs preliminary positioning of the circulating cooling base, and the cylinder rotation and pressing device then achieves secondary fixation through rigid pressing, which avoids workpiece displacement during welding, ensures weld position accuracy, and is suitable for high-precision welding scenarios.

[0041] The battery pack water-cooling plate 1513 includes a cooling base plate 15131, a serpentine liquid circulation tank 15132 inside the cooling base plate 15131, a cover plate bearing step 15133 at the upper end of the serpentine liquid circulation tank 15132, a serpentine cover plate 15134 placed on the cover plate bearing step 15133, and a liquid circulation inlet / outlet 15135 on one side of the cooling base plate 15131. The serpentine cover plate 15134 is spliced ​​with the cover plate bearing step 15133, and the step height of the cover plate bearing step 15133 is greater than the thickness of the serpentine cover plate 15134. The height difference between the spliced ​​serpentine cover plate 15134 and the cooling base plate 15131 is less than 0.1mm. The height difference between the spliced ​​cover plate bearing step and the serpentine cover plate is less than 0.1mm, ensuring a flat welding surface and avoiding defects such as weld burn-through and incomplete welding caused by surface undulations.

[0042] The auxiliary fixing device 152 includes two opposing U-shaped fixing rods 1521. Each U-shaped fixing rod 1521 has a fixing rod 1522 at its upper end. A second lead screw motor lifting device 1523 is installed at the bottom of each end of the fixing rod 1522. A fixed shaft 1524 is installed at the output end of each second lead screw motor lifting device 1523. An annular fixing rod 1525 is fixedly connected to one side of each fixed shaft 1524. A rack 1526 is installed at the bottom of each annular fixing rod 1525. A second slide rail slider moving device 1527 is installed on one side of the annular fixing rod 1525. A gear-driven motor 1528 is installed on one side of the second slide rail slider moving device 1527. A downward-pressing round rod 1529 is installed at the output end of the gear-driven motor 1528. Gears are installed at both ends of the downward-pressing round rod 1529. It is assembled with rack 1526, and the longitudinal movement of the pressing rod 1529 is completed by the gear rotating motor 1528 and the second slide rail slider moving device 1527. The pressing rod 1529 is a movable rod that can rotate on its own with its own bearing. The overall lifting movement of the pressing rod 1529 can be completed by the second screw motor lifting device 1523. The height of the pressing rod is adjusted by the second screw motor lifting device, and the longitudinal movement is achieved by the gear rotating motor and rack transmission. It can dynamically flatten the tail of the serpentine cover plate to prevent the tail from lifting due to thermal stress during welding. It is especially suitable for welding long strip cover plates. The pressing rod has its own bearing and can rotate on its own to avoid deformation of the cover plate caused by hard compression. The second slide rail slider moving device and the screw motor can achieve uniform pressure application.

[0043] The welding cover plate pressing and positioning device 153 includes two opposing gantry fixing rods 1531. An I-shaped fixing beam 1532 is provided at the upper end of the gantry fixing rods 1531. A longitudinal gear motor moving device 1533 is provided on one side of the upper end of the I-shaped fixing beam 1532. A pressing cylinder 1534 is provided through each of the four corners of the upper end of the I-shaped fixing beam 1532. The output end of each pressing cylinder 1534 is connected to a jet pressing head 1535. There are two jet pressing heads 1535, which are separately connected to the four pressing cylinders 1534. The pressing cylinders drive the jet pressing heads to press down, ensuring that the cover plate and the base plate are tightly fitted. The argon nozzle sprays inert gas before welding, and the exhaust air forms a protective gas curtain to prevent high-temperature oxidation. It is especially suitable for welding active metals such as aluminum and magnesium, reducing defects such as porosity 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 pressing head covers workpieces of different sizes.

[0044] The jet pressure head 1535 includes a pressure block 15351, which contains an electromagnet for adsorbing the serpentine cover plate 15134 after pressure, so that it is level with the cooling base plate 15131, which helps to make the welding surface flat. A pipe 15352 is provided on one side of the pressure block 15351, and an argon gas inlet hole 15353 is provided on one end of the pipe 15352. Several argon gas nozzles 153 are evenly and equidistantly arranged on the pipe 15352. 54. Argon nozzle 15354 sprays gas onto the surface of the battery pack water-cooling plate 1513 before welding. The electromagnet inside the lower pressure block adsorbs the cover plate, forcibly eliminating the splicing gap. With the plane drop control technology <0.1mm, the serpentine cover plate is directly adsorbed and placed flush with the cooling base plate to ensure the flatness of the welding surface. Argon gas is evenly sprayed out through the pipe and nozzle to form a protective gas layer with a thickness of about 5-10mm in the welding area, which isolates oxygen and nitrogen and reduces the oxidation rate of the weld metal.

[0045] The lifting device 3 includes a lead screw motor mounting base 31. A lead screw motor 32 is mounted on one side of the upper end of the lead screw motor mounting base 31. A transmission shaft 33 is mounted on the output end of the lead screw motor 32. A lead screw 34 is mounted inside the transmission shaft 33. A crossbeam 35 is fixedly connected to the top of the lead screw 34. A third slide rail slider moving device 36 is mounted on both ends of the crossbeam 35. The crossbeam 35 can be lifted up and down by the cooperation of the lead screw motor 32 and the lead screw 34 with the third slide rail slider moving device 36. At the same time, it drives the lifting welding lens 4 to move a large range of motion to meet the focusing problem of workpieces of different heights. The lead screw motor drives the lead screw to lift the crossbeam. The third slide rail slider moving device ensures smooth movement and can realize the vertical stroke adjustment of the welding lens to quickly adapt to workpieces of different heights. The combined transmission accuracy of the lead screw and slide rail slider is 0.05mm. The two ends of the crossbeam are guided by the third slide rail slider moving device to avoid swaying and vibration during lifting and ensure the stability of the focal length of the welding lens.

[0046] The lifting welding lens 4 includes a second fixed plate 41, which is fixedly connected to the crossbeam 35. A third lead screw motor lifting device 42 is fixedly connected to one side of the second fixed plate 41. A galvanometer welding head 43 is fixedly connected to one side of the third lead screw motor lifting device 42. The third lead screw motor lifting device 42 can perform Z-axis fine adjustment of the galvanometer welding head 43. The third lead screw motor lifting device can perform 0.01-1mm fine adjustment of the galvanometer welding head, which can achieve precise calibration of the laser focal length on the basis of large stroke lifting, and meet the micron-level welding accuracy requirements.

[0047] Working principle: Initial fixation of water-cooled plate: The battery pack water-cooled plate (the splice of cooling base plate and serpentine cover plate) is placed on the fixed plate of the fixed base. The initial positioning is achieved by the elastic buckles at the four corners, which quickly restricts the horizontal displacement of the water-cooled plate. The cylinder rotation and pressing device is activated, and the rigid pressure is applied to the elastic buckles through the rotation and pressing action to complete the secondary fixation of the water-cooled plate, ensuring that the workpiece does not shake during welding.

[0048] Dynamic flattening of the cover plate tail: 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 ring fixing rod is adjusted by the second screw motor lifting device so that the pressing round rod is aligned with the tail of the serpentine cover plate. The gear rotating motor drives the pressing round rod to move longitudinally along the rack. At the same time, the second slide rail slider moving device adjusts in coordination. The pressing round rod contacts the cover plate through its own bearing rotation, avoiding hard extrusion deformation and dynamically flattening the tail that may be raised due to thermal stress.

[0049] Overall pressing and protective gas pretreatment of the cover plate: The I-shaped fixed beam of the welding cover plate pressing and positioning device is adjusted in position by the longitudinal screw motor moving device, so that the four pressing cylinders drive the jet pressing head to align with the surface of the cover plate. The pressing cylinders drive the pressing 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 sprayed out from the nozzle through the pipeline to form a 5-10mm thick protective gas layer in the welding area, and the air is discharged to prevent oxidation.

[0050] Coarse adjustment of welding lens height: The rotating motor of the lifting device drives the lead screw in the transmission shaft to rotate, which drives the crossbeam to move up and down through the third slide rail slider moving device, realizing a wide range of Z-axis movement of the lifting welding lens, quickly adapting to water-cooled plate workpieces of different heights, and completing the coarse adjustment of focus.

[0051] Fine-tuning of welding lens focus: The third lead screw motor lifting device is activated to make a fine adjustment of 0.01-1mm in the Z direction to the galvanometer welding head. Combined with laser ranging feedback, it ensures that the laser focus is accurately positioned on the welding surface to meet the micron-level welding accuracy requirements.

[0052] 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 and align 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 the first slide rail slider moving devices on both sides finely adjust the horizontal position to ensure precise control of the distance between the dust collection port and the welding point.

[0053] Laser welding process: The galvanometer welding head receives the control signal and achieves high-speed scanning of the laser beam by deflecting the internal galvanometer lens. The laser beam passes through the I-shaped fixed crossbeams along the preset trajectory to weld the splice between the serpentine cover plate and the cooling base plate.

[0054] Real-time cooling and dust removal: The inner ring air-blowing cooling chamber is connected to compressed air or inert gas through the inner ring air-blowing connection hole. The gas is sprayed out in a fan shape through the air-blowing cooling holes on the trumpet-shaped sidewall, covering the welding area and rapidly reducing the temperature of the welding point to prevent the water-cooled plate from deforming due to high temperature. The outer ring dust extraction chamber is connected to the dust extraction equipment through the outer ring air extraction connection hole. The bottom annular dust extraction hole simultaneously adsorbs the fumes generated during welding, with a dust removal efficiency of over 95%, preventing fumes from contaminating the lens or depositing on the workpiece surface. During the welding process, the horizontal and vertical screw motor moving device drives the dust extraction and cooling device to move in real time according to the welding trajectory, keeping the relative position of the dust extraction port and the welding point unchanged. The lifting device finely adjusts the height of the welding lens according to the undulations of the workpiece surface to ensure a constant laser focal length.

[0055] Welding complete: The electromagnet of the jet pressure head is de-energized, and the pressure cylinder retracts; the pressure rod of the auxiliary fixing device rises, and then the next area is pressure welded.

[0056] 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A galvanometer welding device for battery pack water-cooled plate, comprising a bearing fixed base (1), characterized in that: The upper end of the fixed base (1) is provided with a gantry frame (2) on both sides. The upper end of the gantry frame (2) is provided with a lifting device (3) on both sides. The lifting device (3) is fixedly connected to the center of the upper end of the lifting device (3). The lifting device (3) is used to control the Z-axis lifting action of the lifting welding lens (4). The supporting fixed base (1) includes a fixed platform (11). Both sides of the upper end of the fixed platform (11) are provided with longitudinal screw motor moving devices (12). The upper end of the longitudinal screw motor moving device (12) is provided with a transverse screw motor moving device (13). The transverse screw motor moving device (13) is provided with a dust suction and cooling device (14). The center position of the upper end of the fixed platform (11) is provided with a clamping welding workbench (15). 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 suction and cooling device (14) and follow the welding area to cool and suction the dust. 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 battery pack water-cooling plate (1513) includes a cooling base plate (15131), a serpentine liquid circulation tank (15132) is provided inside the cooling base plate (15131), a cover plate bearing step (15133) is provided at the upper end of the serpentine liquid circulation tank (15132), a serpentine cover plate (15134) is placed on the cover plate bearing step (15133), a liquid circulation inlet and outlet (15135) is provided on one side of the cooling base plate (15131), the serpentine cover plate (15134) is spliced ​​with the cover plate bearing step (15133), and the step height of the cover plate bearing step (15133) is greater than the thickness of the serpentine cover plate (15134). The height difference between the spliced ​​serpentine cover plate (15134) and the cooling base plate (15131) is less than 0.1 mm. The auxiliary fixing device (152) includes two opposing U-shaped fixing rods (1521). Each U-shaped fixing rod (1521) has a fixing rod (1522) at its upper end. Each fixing rod (1522) has a second lead screw motor lifting device (1523) at its bottom end. Each output end of the second lead screw motor lifting device (1523) has a fixed shaft (1524). Each fixed shaft (1524) has a fixed annular fixing rod (1525) on one side. Each annular fixing rod (1525) has a rack (1526) at its bottom. Each annular fixing rod (1525) has a second slide rail slider moving device (1527) on one side. Each second slide rail slider moving device (1527) has a gear-driven motor on one side. 1528), the output end of the gear rotating motor (1528) is provided with a pressing round rod (1529). Both ends of the pressing round rod (1529) are provided with gears and are matched with the rack (1526). At the same time, the longitudinal movement of the pressing round rod (1529) is completed by the drive of the gear rotating motor (1528) in conjunction with the second slide rail slider moving device (1527). The pressing round rod (1529) is a self-rotating movable round rod with its own bearing. At the same time, the overall lifting and lowering movement of the pressing round rod (1529) can be completed by the second screw motor lifting device (1523). The pressing round rod (1529) can press down on the tail of the serpentine cover plate (15134) to ensure that it is in a flat state during welding and to avoid the tail from lifting up.

2. The galvanometer welding apparatus for a battery pack water-cooled plate according to claim 1, characterized in that: The dust collection and cooling device (14) includes a first screw motor lifting device (141), and a first slide rail slider moving device (142) is 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 collection device (144) is fixedly connected to the L-shaped fixing plate (143).

3. The galvanometer welding apparatus for a battery pack water-cooled plate according to claim 2, characterized in that: The dust collection device (144) includes a hollow cooling dust collection column (1441). An inner ring air-blowing cooling chamber (1442) is provided on one side of the hollow cooling dust collection column (1441). An outer ring dust collection chamber (1443) is provided on the adjacent side of the inner ring air-blowing cooling chamber (1442). A trumpet-shaped sidewall (1444) is provided at the bottom of the inner ring of the hollow cooling dust collection column (1441). A plurality of sidewall air-blowing cooling holes (1445) are evenly and equidistantly arranged on the trumpet-shaped sidewall (1444). The outer ring dust collection chamber (1444)... 3) Several bottom dust suction holes (1446) are evenly spaced around the bottom. The inner ring air blowing cooling cavity (1442) has inner ring air blowing connection holes (1447) on both sides of the upper end. These are used to connect a hose to blow air into the cavity and cool the welding area through the side wall air blowing cooling holes (1445). The outer ring dust extraction cavity (1443) has an outer ring air extraction connection hole (1448) on one side wall. This is used to connect a hose to extract air into the cavity and extract dust from the welding area through the bottom dust suction holes (1446).

4. The galvanometer welding device for water-cooled plate of battery pack according to claim 3, characterized in that: The fixed base (151) includes a first fixed plate (1511), and each of the four corners of the upper end of the first fixed plate (1511) is provided with an elastic buckle (1512). The upper end of the elastic buckle (1512) is provided with a battery pack water cooling plate (1513). Each of the four corners of the upper end of the first fixed plate (1511) is provided with a cylinder rotation and pressing device (1514) for rotating and pressing down to position the battery pack water cooling plate (1513).

5. The galvanometer welding device for water-cooled plate of battery pack according to claim 4, characterized in that: The welding cover plate pressing and positioning device (153) includes two opposing gantry fixing rods (1531). The upper end of the gantry fixing rod (1531) is provided with an I-shaped fixing beam (1532). A longitudinal gear motor moving device (1533) is provided on one side of the upper end of the I-shaped fixing beam (1532). A downward pressing cylinder (1534) is provided through each of the four corners of the upper end of the I-shaped fixing beam (1532). The output end of each downward pressing cylinder (1534) is connected to a jet pressing head (1535). There are two jet pressing heads (1535), which are separately connected to the four downward pressing cylinders (1534).

6. The galvanometer welding device for water-cooled plate of battery pack according to claim 5, characterized in that: The jet pressure head (1535) includes a pressure block (15351), which contains an electromagnet for adsorbing the serpentine cover plate (15134) after being pressed down, so that it is at the same level as the cooling base plate (15131), which helps to make the welding surface flat. A pipe (15352) is provided on one side of the pressure block (15351), and an argon gas inlet hole (15353) is provided on one side of the pipe (15352). Several argon gas nozzles (15354) are evenly and equidistantly arranged on the pipe (15352). The argon gas nozzles (15354) spray the surface of the battery pack water cooling plate (1513) before welding.

7. The galvanometer welding device for water-cooled plate of battery pack according to claim 6, characterized in that: The lifting device (3) includes a lead screw motor mounting base (31), a lead screw rotating motor (32) is provided on one side of the upper end of the lead screw motor mounting base (31), a transmission shaft (33) is provided at the output end of the lead screw rotating motor (32), a lead screw (34) is provided inside the transmission shaft (33), a crossbeam (35) is fixedly connected to the top of the lead screw (34), and a third slide rail slider moving device (36) is provided at both ends of the crossbeam (35). The crossbeam (35) can be lifted up and down by the cooperation of the lead screw rotating motor (32) and the lead screw (34) with the third slide rail slider moving device (36), and at the same time, it drives the lifting welding lens (4) to move a large distance to meet the focusing problem of processing workpieces at different heights.

8. The galvanometer welding device for water-cooled plate of battery pack according to claim 7, characterized in that: The lifting welding lens (4) includes a second fixing 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 fixing plate (41), and a galvanometer welding head (43) is fixedly connected to one side of the third screw motor lifting device (42). The third screw motor lifting device (42) can perform Z-axis fine adjustment of the galvanometer welding head (43).

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