New energy battery box welding device and method

Abstract

The invention discloses a new energy battery box welding device and method, and particularly relates to the field of welding devices.The new energy battery box welding device comprises a main workbench, a welding frame is arranged on the outer side of the main workbench, a battery box body is arranged at the top of the main workbench, a control table is further arranged on one side of the main workbench, and feeding conveying belts are further arranged on the two sides of the main workbench; the main workbench comprises a supporting frame, a box carrying table is arranged at the top of the supporting frame, and limiting clamp pieces are arranged between the top of the box carrying table and the battery box body and between the supporting frame and the battery box body. A to-be-welded battery box body is conveyed to the position of the main workbench through a to-be-fed conveying belt, an adjusting air cylinder works to drive a push plate to adjust the body position of a box tray, an electromagnet works to magnetically attract a magnetic metal additional part through a limiting convex column, height detection is conducted through a correlation type photoelectric switch, and then the battery box body is welded. The welding precision of the battery box can be guaranteed by improving an existing welding production line, and assembly upgrading can be carried out on an existing semi-automatic machining production line.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and more specifically, to a new energy battery box welding device and method. Background Art

[0002] With the rapid development of new energy vehicles, energy storage systems, and other fields, power batteries, as core components, have a manufacturing process that directly impacts their safety, energy density, and service life. The battery box (typically made of aluminum alloy, stainless steel, or composite materials) is the primary load-bearing and protective structure of the battery module, making its welding quality crucial. Currently, laser welding or friction stir welding are commonly used for welding new energy battery boxes, but these methods present challenges such as high equipment costs and a narrow process window. While existing laser welding devices can achieve high-speed welding, they place stringent demands on workpiece assembly precision. Specifically, weld seams in new energy battery boxes must meet airtightness, strength, and electrical conductivity requirements, otherwise they could cause battery leakage or short circuits. In particular, the precise dimensions of the mounting slots must be ensured during the preparation of multi-battery storage boxes. Otherwise, standard batteries may not fit smoothly or gaps may exist in the space, causing the inserted batteries to wobble. However, although current production line technology can ensure the accuracy of welding routes, the improvement of its fully automated production line is more difficult than the upgrade of current semi-automated production lines. The upgrade costs required for producers are too high, and it is impossible to quickly upgrade the new energy vehicle parts production line in a short period of time. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a new energy battery box welding device and method. The technical problem to be solved by the present invention is: how to reduce the cost investment when upgrading the battery box welding production line and ensure the yield of the finished new energy battery box products.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a new energy battery box welding device, comprising a main workbench, a welding frame is provided on the outside of the main workbench, a battery box body is provided on the top of the main workbench, a control console is provided on one side of the main workbench, and feeding conveyor belts are provided on both sides of the main workbench; The main workbench includes a support frame, a box loading platform is provided on the top of the support frame, and a limiting clamp is provided on the top of the box loading platform and between the support frame and the battery box body; The box loading platform includes a loading plate, on which a plurality of limiting protrusions are arranged in a row, an electromagnet is provided at the bottom of the limiting protrusions, and a beam-type photoelectric switch is also provided in the horizontal and vertical directions on the loading plate; The battery box body includes a box tray, and reinforcing ribs are arranged horizontally and vertically in the inner cavity of the box tray. A plurality of magnetic metal external parts are evenly arranged on the bottom plate of the box tray.

[0005] In a preferred embodiment, the welding frame includes a main support frame, a mechanical arm is provided on one side of the main support frame, a transverse transmission member is provided between one end of the mechanical arm and the main support frame, and a welding gun head is provided at the other end of the mechanical arm; The transverse transmission component includes a forward and reverse motor and a transmission gear connected to the output shaft of the forward and reverse motor. A transverse groove is provided inside the main support frame. A rack is provided inside the transverse groove that engages with the transmission gear. The robotic arm realizes transverse reciprocating movement along the main support frame through the rotation of the forward and reverse motor.

[0006] In a preferred embodiment, the robotic arm includes at least three swing arms, adjacent swing arms are connected by steering bearings, and an elbow joint motor is provided at the connection of the steering bearings, and the elbow joint motor and the bearings are used to adjust the position of the welding gun head in the X, Y and Z axes; The mechanical arm, the transverse transmission member, the welding gun head, the main workbench and the feeding conveyor belt are all electrically controlled and connected to the control console.

[0007] In a preferred embodiment, the box tray and the reinforcing rib plate are both cast from high-strength aluminum alloy, and an inner groove is provided at the connection between the box tray and the magnetic metal external component; The magnetic metal external parts are configured as bolts or concave caps, and the magnetic metal external parts are built-in and fixed inside the inner groove, and the magnetic metal external parts are all made of one of the materials selected from aluminum-nickel-cobalt alloy, rare earth permanent magnet alloy, platinum-cobalt alloy, iron-aluminum alloy or iron-cobalt alloy.

[0008] In a preferred embodiment, the box loading platform is fixedly mounted on the top of the support frame, and a plurality of position limiting fixtures are arranged along the outer contour of the box tray; A plurality of limiting bosses are arranged in alignment with the magnetic metal external parts, and the limiting bosses are made of magnetic metal material. A lifting frame is provided between the through-beam photoelectric switch and the carrier plate. The lifting frame is arranged in a "Z" shape to lift the detection head of the through-beam photoelectric switch to a height higher than the battery box body. The carrier plate is also provided with an adjusting cylinder, and an output shaft of the adjusting cylinder is fixed with a push plate.

[0009] In a preferred embodiment, the limiting clamp member includes a main body shell, a lower clamping plate is fixedly provided on one side of the main body shell, a flip cylinder is fixedly provided on the bottom of the main body shell, an upper clamping plate is provided on the top of the main body shell, the output shaft of the flip cylinder is hinged to the upper clamping plate, and one end of the upper clamping plate is rotatably connected to the main body shell through a steering shaft; the upper clamping plate is driven to flip along the steering shaft and abut against the lower clamping plate by the contraction of the flip cylinder, thereby realizing the clamping of the box pallet at that position.

[0010] In a preferred embodiment, the feeding conveyor belt includes a loading conveyor belt and a unloading conveyor belt, wherein the loading conveyor belt and the unloading conveyor belt are respectively arranged on both sides of the main workbench; The support frame is arranged across the outer side of the main workbench, and a grabbing arm is additionally provided on one side of the support frame.

[0011] The present invention also includes a new energy battery box welding method, and the specific welding steps are as follows: S1. Battery box assembly: Align the cast box tray and the reinforcing rib plate, fix them with bolts or snap them together, and align the magnetic metal add-on parts to the corresponding positions of the inner grooves to obtain the battery box body; S2. Loading: The battery box body obtained in step S1 is transported to the top of the main workbench by the loading conveyor. At this time, the adjusting cylinder works by the push plate to adjust the position of the battery box body on the main workbench. At this time, the electromagnet works by the limiting protrusion to position the magnetic metal external parts, and the through-beam photoelectric switch monitors whether the battery box body is accurately positioned; S3, fixing: when the battery box body is accurately positioned in step S2, the battery box body is clamped by the limiting clamp to ensure clamping stability; S4. Welding: The welding route is set by the console, and the position of the robotic arm is adjusted to practically adjust the welding point of the welding gun head to ensure the welding accuracy of the box pallet and the reinforcing rib plate to complete the welding work; S5. Unloading: The limit clamp releases the clamping state and the electromagnet is de-energized. The grabbing arm removes the welded battery box body from the main workbench and transports it to the unloading conveyor. The unloading conveyor then transports the welded battery box body to the subsequent process location.

[0012] The technical effects and advantages of the present invention are as follows: 1. In the present invention, the loading conveyor belt transports the battery box body to be welded to the main workbench position, the regulating cylinder drives the push plate to adjust the position of the box tray, and the electromagnet works to magnetically attract the magnetic metal external parts by the limiting protrusion, and the height is detected by the through-beam photoelectric switch. The welding accuracy of the battery box can be guaranteed by improving the existing welding production line, and the components can be upgraded on the existing semi-automatic processing production line; 2. In the present invention, after the battery box body is transported to the carrier plate position, the adjusting cylinder and the electromagnet complete the initial fixation, and the lower clamping plate supports the bottom of the box pallet, and the flip cylinder works to retract the output shaft, driving the upper clamping plate to flip downward along the steering axis. The upper clamping plate and the lower clamping plate corresponding to the multiple groups of limit clamps synchronously fix and clamp the battery box body to ensure a batch fixed clamping state that is adapted to the shape of the battery box body, avoiding accuracy deviation caused by dislocation due to force during welding of the welding gun head. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second viewing angle.

[0015] Figure 3 It is a structural schematic diagram of the welding frame of the present invention.

[0016] Figure 4 It is a schematic structural diagram of the main workbench of the present invention.

[0017] Figure 5 It is a schematic diagram of the box loading platform structure of the present invention.

[0018] Figure 6 This is a schematic diagram of the structure of the box-carrying platform of the present invention from an upward perspective.

[0019] Figure 7 It is a schematic structural diagram of the battery box body of the present invention.

[0020] Figure 8 It is a schematic diagram of the structure of the limiting clamp of the present invention.

[0021] Reference numerals are: 10 welding frame, 20 battery box body, 30 main workbench, 40 control console, 50 feeding conveyor belt; 101 main support frame, 102 robotic arm, 103 transverse transmission member, 104 welding gun head; 201 box pallet, 202 stiffening plate, 203 magnetic metal external parts; 301 support frame, 302 box loading platform, 303 limit fixture; 3021 carrier plate, 3022 adjusting cylinder, 3023 push plate, 3024 limiting boss, 3025 electromagnet, 3026 through-beam photoelectric switch, 3027 lifting frame; 3031 main body shell, 3032 lower clamping plate, 3033 turning cylinder, 3034 upper clamping plate, 3035 steering shaft. DETAILED DESCRIPTION

[0022] 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.

[0023] Example 1: The present invention provides Figure 1-Figure 2 A new energy battery box welding device shown includes a main workbench 30, a welding rack 10 is provided on the outside of the main workbench 30, a battery box body 20 is provided on the top of the main workbench 30, a control console 40 is also provided on one side of the main workbench 30, and feeding conveyors 50 are provided on both sides of the main workbench 30. The feeding conveyors 50 include a loading conveyor belt and a unloading conveyor belt, wherein the loading conveyor belt and the unloading conveyor belt are respectively provided on both sides of the main workbench 30. The loading conveyor belt transports the battery box body 20 to be welded to the top of the main workbench 30, and the welding rack 10 works to weld the battery box body 20 at this position, and the unloading conveyor belt transports the welded battery box body 20 away from the processing position; like Figure 2-Figure 3 The welding frame 10 includes a main support frame 101, which is arranged across the outside of the main workbench 30, and a grab arm is added to one side of the main support frame 101. A mechanical arm 102 is provided on one side of the main support frame 101, and a transverse transmission member 103 is provided between one end of the mechanical arm 102 and the main support frame 101, and a welding gun head 104 is provided at the other end of the mechanical arm 102; the transverse transmission member 103 includes a forward and reverse motor and a transmission gear connected to the output shaft of the forward and reverse motor, and a transverse slot is provided inside the main support frame 101, and a transverse slot is provided inside the transverse slot. The transmission gear meshes with the transmission rack, and the robot arm 102 is moved back and forth laterally along the main support frame 101 by rotating the forward and reverse motors; the robot arm 102 includes at least three swing arms, and adjacent swing arms are connected by steering bearings, and an elbow joint motor is provided at the connection of the steering bearings. The elbow joint motor and bearings are used to adjust the X, Y and Z axial positions of the welding gun head 104; the robot arm 102, the transverse transmission member 103, the welding gun head 104, the main workbench 30 and the feeding conveyor belt 50 are all electrically controlled and connected to the control console 40; The specific implementation method is as follows: after the battery box body 20 to be welded is transported to the top of the main workbench 30 by the feeding conveyor 50, the standard welding route on the battery box body 20 is determined based on the design drawing of the battery box body 20 to be welded (if the battery boxes of the same batch have the same specifications, the welding route is fixed). After the battery box body 20 is stably clamped by the main workbench 30, the reciprocating transverse movement of the transverse transmission member 103 on the main support frame 101 causes a large lateral adjustment of the welding gun head 104, while the axial position adjustment of the robot arm 102 changes the X, Y and Z axial positions of the welding gun head 104 to a small extent, thereby completing the successive processes of the entered welding route; like Figure 4 and Figure 7 The battery box body 20 includes a box tray 201, and the inner cavity of the box tray 201 is provided with reinforcing ribs 202 arranged horizontally and vertically. A plurality of magnetic metal external parts 203 are evenly arranged at the bottom plate of the box tray 201; the box tray 201 and the reinforcing ribs 202 are both cast from high-strength aluminum alloy, and an inner groove is provided at the connection between the box tray 201 and the magnetic metal external parts 203; the magnetic metal external parts 203 are configured as bolts or concave caps, and the magnetic metal external parts 203 are built-in and fixed inside the inner groove, and the magnetic metal external parts 203 are all made of a material selected from aluminum-nickel-cobalt alloy, rare earth permanent magnet alloy, platinum-cobalt alloy, iron-aluminum alloy or iron-cobalt alloy; like Figure 4 As shown, the main workbench 30 includes a support frame 301, a box loading platform 302 is provided on the top of the support frame 301, and a limiting clamp 303 is provided on the top of the box loading platform 302 and between the support frame 301 and the battery box body 20. The box loading platform 302 is fixed to the top of the support frame 301, and multiple limiting clamps 303 are arranged along the outer contour of the box tray 201; like Figure 5-Figure 6 The box loading platform 302 includes a loading plate 3021, on which a plurality of limiting protrusions 3024 are arranged in a row. An electromagnet 3025 is provided at the bottom of the limiting protrusions 3024. The loading plate 3021 is also provided with a beam-type photoelectric switch 3026 in the horizontal and vertical directions. The plurality of limiting protrusions 3024 are arranged in alignment with the magnetic metal external component 203, and the limiting protrusions 3024 are made of a magnetic metal material. A lifting frame 3027 is provided between the beam-type photoelectric switch 3026 and the loading plate 3021. The lifting frame 3027 is arranged in a "Z" shape to lift the detection head of the beam-type photoelectric switch 3026 to a height higher than the battery box body 20. An adjusting cylinder 3022 is also provided on the loading plate 3021, and a push plate 3023 is fixed to the output shaft of the adjusting cylinder 3022. The specific implementation method is as follows: the loading conveyor belt transports the battery box body 20 to be welded to the top of the carrier plate 3021. At this time, the adjusting cylinder 3022 drives the push plate 3023 to adjust the position of the box tray 201 (the adjusting cylinder 3022 and the push plate 3023 can also be set in the longitudinal direction to adjust the position of the box tray 201 in the longitudinal position). At this time, the electromagnet 3025 works to magnetically adsorb the magnetic metal external part 203 by the limiting boss 3024, and the position of the inner groove is limited by the limiting boss 3024 (if the limiting boss 3024 is not aligned with the inner groove, the height of the top of the box tray 201 is higher than the height of the detection point of the opposing photoelectric switch 3026), so that The aligned through-beam photoelectric switch 3026 receives the signal to form a height detection. When both the horizontal and vertical through-beam photoelectric switches 3026 detect the signal, it is proved that the battery box body 20 is accurately installed at the corresponding position of the main workbench 30, thereby ensuring that the battery box body 20 in this position conforms to the entered welding route, and has a high similarity with the existing welding production line. Improvements on the existing welding production line can ensure the welding accuracy of the battery box, and component upgrades can be performed on the existing semi-automatic processing production line. After the welding is completed, the limit fixture 303 and the electromagnet 3025 are released from the working state, and the grabbing arm sends the welded battery box body 20 to the unloading conveyor belt for transportation; like Figure 8 The limiting clamp member 303 includes a main body shell 3031, a lower clamping plate 3032 is fixedly provided on one side of the main body shell 3031, a flip cylinder 3033 is fixedly provided on the bottom of the main body shell 3031, and an upper clamping plate 3034 is provided on the top of the main body shell 3031. The output shaft of the flip cylinder 3033 is hinged to the upper clamping plate 3034, and one end of the upper clamping plate 3034 is rotatably connected to the main body shell 3031 through the steering shaft 3035; the contraction of the flip cylinder 3033 drives the upper clamping plate 3034 to flip along the steering shaft 3035 and abut against the lower clamping plate 3032, thereby clamping the box pallet 201 at that position; The specific implementation method is as follows: after the battery box body 20 is transported to the position of the carrier plate 3021, the adjusting cylinder 3022 and the electromagnet 3025 complete the initial fixation, and the lower clamping plate 3032 supports the bottom of the box tray 201, and the output shaft is retracted by the flip cylinder 3033 to drive the upper clamping plate 3034 to flip downward along the steering shaft 3035. The upper clamping plates 3034 and the lower clamping plates 3032 corresponding to the multiple groups of limiting clamps 303 are synchronously fixed to clamp the battery box body 20. After the welding work is completed, the output shaft of the flip cylinder 3033 is extended to cancel the clamping state of the upper clamping plate 3034 and the lower clamping plate 3032, so as to facilitate the subsequent grasping arm to clamp and separate the battery box body 20 after welding. The present invention also includes a new energy battery box welding method, and the specific welding steps are as follows: S1, battery box assembly: the cast tray 201 and the reinforcing rib plate 202 are installed in position, bolted or clamped in position, and the magnetic metal outer reinforcing part 203 is installed in position in the corresponding position of the inner groove, and the battery box body 20 is obtained; S2, feeding: the battery box body 20 obtained in step S1 is transported to the top of the main workbench 30 by the feeding conveyor belt, at this time the cylinder 3022 is adjusted to adjust the position of the battery box body 20 on the main workbench 30 by the push plate 3023, at this time the electromagnet 3025 is working to position the position of the magnetic metal outer reinforcing part 203 by the limiting convex column 3024, and whether the battery box body 20 is accurately positioned is monitored by the light barrier photoelectric switch 3026; S3, fixing: when the battery box body 20 is accurately positioned in step S2, the battery box body 20 is clamped by the limiting clamp 303 to ensure the clamping stability; S4, welding: the welding route is set by the control console 40, the welding point of the welding gun head 104 is adjusted by the position adjustment utility of the mechanical arm 102 to ensure the welding accuracy of the tray 201 and the reinforcing rib plate 202, and the welding work is completed; S5, discharging: the limiting clamp 303 is released from the clamping state, and the electromagnet 3025 is de-energized, the battery box body 20 after welding is clamped from the main workbench 30 by the grabbing arm and transported to the discharging conveyor belt, and the battery box body 20 after welding is transported to the subsequent process location by the discharging conveyor belt.

[0024] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change; Secondly: the drawings of the disclosed embodiments of the present application only involve the structures involved in the disclosed embodiments, other structures can refer to the usual design, and in the case of no conflict, the same embodiments and different embodiments of the present application can be combined with each other; Finally: the above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A new energy battery box welding device, characterized by: It comprises a main workbench (30), a welding frame (10) is provided on the outside of the main workbench (30), a battery box body (20) is provided on the top of the main workbench (30), a control console (40) is provided on one side of the main workbench (30), and feeding conveyor belts (50) are provided on both sides of the main workbench (30); The main workbench (30) comprises a support frame (301), a box-carrying platform (302) is provided on the top of the support frame (301), and a limiting clamp (303) is provided on the top of the box-carrying platform (302) and between the support frame (301) and the battery box body (20); The box carrying platform (302) comprises a carrier plate (3021), a plurality of position-limiting protrusions (3024) are arranged in a row on the carrier plate (3021), an electromagnet (3025) is provided at the bottom of the position-limiting protrusions (3024), and a beam-type photoelectric switch (3026) is also provided on the carrier plate (3021) in the horizontal and vertical directions; The battery box body (20) comprises a box tray (201), wherein the inner cavity of the box tray (201) has reinforcing ribs (202) arranged in a transverse and longitudinal direction, and a plurality of magnetic metal external parts (203) are evenly arranged on the bottom plate of the box tray (201).

2. A new energy battery box welding device according to claim 1, characterized in that: The welding frame (10) comprises a main support frame (101), a mechanical arm (102) is provided on one side of the main support frame (101), a transverse transmission member (103) is provided between one end of the mechanical arm (102) and the main support frame (101), and a welding gun head (104) is provided at the other end of the mechanical arm (102); The transverse transmission member (103) includes a forward and reverse motor and a transmission gear connected to the output shaft of the forward and reverse motor. A transverse slot is provided inside the main support frame (101). A rack is provided inside the transverse slot for meshing with the transmission gear. The mechanical arm (102) is moved back and forth laterally along the main support frame (101) by rotating the forward and reverse motor.

3. A new energy battery box welding device according to claim 2, characterized in that: The mechanical arm (102) comprises at least three swing arms, adjacent swing arms are connected via steering bearings, and an elbow joint motor is provided at the connection of the steering bearings, and the elbow joint motor and the bearings are used to achieve position adjustment of the welding gun head (104) in the X, Y and Z axes; The mechanical arm (102), the transverse transmission member (103), the welding gun head (104), the main workbench (30) and the feeding conveyor belt (50) are all electrically controlled and connected to the control console (40).

4. A new energy battery box welding device according to claim 1, characterized in that: The box tray (201) and the reinforcing rib plate (202) are both cast from a high-strength aluminum alloy, and an inner groove is provided at the connection between the box tray (201) and the magnetic metal external component (203); The magnetic metal external component (203) is configured as a bolt or a concave cap, and the magnetic metal external component (203) is built-in and fixed inside the inner groove, and the magnetic metal external component (203) is made of a material selected from the group consisting of aluminum-nickel-cobalt alloy, rare earth permanent magnet alloy, platinum-cobalt alloy, iron-aluminum alloy, or iron-cobalt alloy.

5. The new energy battery box welding device according to claim 1, characterized in that: The box loading platform (302) is fixedly arranged on the top of the support frame (301), and a plurality of position limiting clamps (303) are arranged along the outer contour of the box tray (201); A plurality of limiting bosses (3024) are arranged in alignment with the magnetic metal external component (203), and the limiting bosses (3024) are made of a magnetic metal material. A lifting frame (3027) is provided between the opposing photoelectric switch (3026) and the carrier plate (3021), and the lifting frame (3027) is arranged in a "Z" shape to lift the detection head of the opposing photoelectric switch (3026) to a height higher than the battery box body (20); An adjusting cylinder (3022) is also provided on the carrier plate (3021), and a push plate (3023) is fixedly provided on the output shaft of the adjusting cylinder (3022).

6. A new energy battery box welding device according to claim 5, characterized in that: The limiting clamp member (303) comprises a main body shell (3031), a lower clamping plate (3032) is fixedly provided on one side of the main body shell (3031), a turning cylinder (3033) is fixedly provided on the bottom of the main body shell (3031), and an upper clamping plate (3034) is provided on the top of the main body shell (3031), an output shaft of the turning cylinder (3033) is hinged to the upper clamping plate (3034), and one end of the upper clamping plate (3034) is rotatably connected to the main body shell (3031) via a steering shaft (3035).

7. The new energy battery box welding device according to claim 1, characterized in that: The feeding conveyor belt (50) includes a loading conveyor belt and a unloading conveyor belt, wherein the loading conveyor belt and the unloading conveyor belt are respectively arranged on both sides of the main workbench (30); The main support frame (101) is arranged across the outside of the main workbench (30), and a grabbing arm is additionally provided on one side of the main support frame (101).

8. A new energy battery box welding method, applied to the new energy battery box welding device according to any one of claims 1 to 7, characterized in that: The specific welding steps are as follows: S1. Assembling the battery box: aligning the cast box tray (201) and the reinforcing rib plate (202), fixing them with bolts or snapping them together, and aligning the magnetic metal external parts (203) to the corresponding positions of the inner grooves to obtain the battery box body (20); S2, loading: The battery box body (20) obtained in step S1 is transported to the top of the main workbench (30) by the loading conveyor belt. At this time, the adjusting cylinder (3022) works to adjust the position of the battery box body (20) on the main workbench (30) by the push plate (3023). At this time, the electromagnet (3025) works to position the magnetic metal external part (203) by the limiting protrusion (3024), and the opposing photoelectric switch (3026) monitors whether the battery box body (20) is accurately positioned; S3, fixing: when the battery box body (20) is accurately positioned in step S2, the battery box body (20) is clamped by the limiting clamp (303) to ensure clamping stability; S4, welding: according to the welding route set by the control console (40), the welding point of the welding gun head (104) is adjusted by the position adjustment of the robot arm (102) to ensure the welding accuracy of the box tray (201) and the reinforcing rib plate (202), and complete the welding work; S5, unloading: the limiting clamp (303) is released from the clamping state, and the electromagnet (3025) is released from the energized state, and the grasping arm clamps the battery box body (20) after welding from the main workbench (30) and transports it to the unloading conveyor, and the unloading conveyor transports the battery box body (20) after welding to the subsequent process location.

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