A dual-station battery shell automatic welding device and welding method

Abstract

The present invention belongs to the field of battery shell welding technology, and in particular to a dual-station battery shell automatic welding device and welding method, including laser welding equipment and a multi-axis welding robot. The dual-station battery shell automatic welding device and welding method are provided with two laser welding equipment, two multi-axis welding robots, two welding support flipping mechanisms and two dual-station clamping mechanisms. When in use, the two battery shells are welded and clamped by the dual-station clamping mechanism, and the two laser welding guns are driven to move by the two multi-axis welding robots to weld the battery shells on the two stations. At the same time, when welding different angles and different surfaces of the battery shell, the battery shell is driven to move and weld by the welding support flipping mechanism, so as to realize automatic clamping and automatic welding of two battery shells at one time, thereby solving the problems of low automation and welding efficiency and large welding deformation of the battery shell welding device.

Description

Technical Field

[0001] The present invention relates to the technical field of battery shell welding, and in particular to a double-station battery shell automatic welding device and a welding method. Background Art

[0002] As a commonly used energy supply unit, the safety of batteries has always been a focus of attention. When battery packs are used, they need to be encapsulated in battery shells. As batteries are used as the main new energy source, the demand for battery shells is also increasing day by day.

[0003] When welding battery shells, most of the existing battery shell welding devices use customized fixtures with welding robots for single-station welding. This welding method not only has low welding efficiency, but is also affected by the production order volume. In order to save production costs, the degree of automation of most customized fixtures is low. During the welding process, not only manual clamping is required, but also multiple clamping is required when welding different parts of the battery shell, resulting in low welding automation and welding efficiency. In addition, after multiple clamping, there is a problem of large welding deformation. Therefore, a double-station battery shell automatic welding device and welding method are needed. Summary of the Invention

[0004] Based on the technical problems of the existing battery shell welding device, such as low automation level and welding efficiency and large welding deformation, the present invention proposes a double-station battery shell automatic welding device and welding method.

[0005] The present invention proposes a dual-station battery shell automatic welding device, which includes a laser welding device and a multi-axis welding robot, wherein the two laser welding devices correspond to the two multi-axis welding robots.

[0006] The two multi-axis welding robots are located on the same horizontal straight line. A laser welding gun is fixedly installed at one end of the multi-axis welding robot, and the laser welding gun is connected to the laser welding equipment.

[0007] Welding support flipping mechanisms are provided on both sides of the multi-axis welding robot, and a double-station clamping mechanism is provided on the surface of the welding support flipping mechanism.

[0008] Among them, the welding support flipping mechanism is used to provide support for the double-station clamping mechanism, and drive the double-station clamping mechanism and the battery shell to perform flip welding.

[0009] Among them, the double-station clamping mechanism is used for clamping and positioning welding of the battery shell.

[0010] Preferably, the welding support flipping mechanism includes a fixed base, the upper surface of which is fixedly mounted with a support box column by bolts, and the two support box columns are symmetrically arranged with the axis of the fixed base as the center;

[0011] The surface of the supporting box column is rotatably connected to a flip driving wheel through a bearing and a rotating shaft, and a flip driving motor is fixedly installed on the surface of one of the supporting box columns, and the output shaft of the flip driving motor is fixedly connected to one of the flip driving wheels through a key and a keyway.

[0012] Preferably, a connecting mounting bracket is provided on the surface of the flip driving wheel, and two ends of the connecting mounting bracket are fixedly connected to the surfaces of the two flip driving wheels respectively by bolts.

[0013] Preferably, the double-station clamping mechanism includes a fixture mounting plate, which is fixedly mounted on the surface of the connecting mounting frame, and the two fixture mounting plates are symmetrically distributed around the axis of the connecting mounting frame.

[0014] Preferably, the upper surface of the fixture mounting plate is fixedly connected with a battery shell welding pad and a battery shell welding limiting angle plate by bolts, and a plurality of the battery shell welding pads and a plurality of the battery shell welding limiting angle plates correspond to each other, and the plurality of the battery shell welding pads and the plurality of the battery shell welding limiting angle plates are symmetrically distributed with the axis of the battery shell being welded as the center;

[0015] The surface of the battery shell welding limiting angle plate is L-shaped.

[0016] Preferably, a fixed clamping cylinder, a fixed clamping limit cylinder, a bottom shell limit clamping cylinder and an adjustable pneumatic clamping mechanism are fixedly mounted on the surface of the fixture mounting plate respectively;

[0017] The two fixed clamping cylinders are symmetrically distributed with the axis of the welding battery shell as the center. Both of the fixed clamping cylinders are located on one side of the welding battery shell. The fixed clamping cylinder includes a fixed clamping gas rod, and a fixed clamp is fixedly installed on one end of the fixed clamping gas rod.

[0018] Preferably, the plurality of fixed clamping limit cylinders are respectively located on the four sides of the welded battery housing, the surfaces of the fixed clamping limit cylinders are fixedly mounted with limit hinge seats by bolts, the fixed clamping limit cylinders include fixed clamping limit gas rods, and one end of the fixed clamping limit gas rods is fixedly mounted with a fixed limit chuck;

[0019] The surface of the fixed limiting clamp is hinged to the surface of the limiting hinge seat.

[0020] Preferably, the two bottom shell limiting clamping cylinders correspond to the two fixed clamping cylinders, and a bottom shell clamping fixture is installed on the surface of the bottom shell limiting clamping cylinder, and the bottom shell clamping fixture is fixedly connected to the surface of the fixture mounting plate through a supporting angle plate.

[0021] Preferably, the adjustable pneumatic clamping mechanism includes a stroke cylinder, and four of the stroke cylinders are symmetrically distributed around the axis of the fixture mounting plate;

[0022] The stroke cylinder includes a stroke gas rod, one end of which is fixedly mounted with a movable cylinder seat, a surface of the fixture mounting plate is fixedly mounted with a stroke guide rail, and the surface of the movable cylinder seat is slidably connected to the surface of the stroke guide rail;

[0023] A mobile clamping cylinder is fixedly mounted on the surface of the mobile cylinder seat, and the mobile clamping cylinder includes a mobile clamping gas rod. A chuck frame is fixedly mounted on the surface of the mobile clamping cylinder, and a mobile chuck is slidably connected to the inner wall of the chuck frame. One end of the mobile clamping gas rod is fixedly connected to the surface of the mobile chuck.

[0024] Preferably, a welding method of a dual-station battery shell automatic welding device comprises the following steps:

[0025] Step 1: Place the battery shell to be welded on four fixture mounting plates, and support and position the battery shell by the battery shell welding pads and battery shell welding limit angle plates on the fixture mounting plates;

[0026] Step 2: Use the fixed clamping cylinder, the fixed clamping limit cylinder, the bottom shell limit clamping cylinder and the adjustable pneumatic clamping mechanism to drive the fixed clamping head, the fixed limit clamping head, the bottom shell clamping fixture and the movable clamping head to weld and fix the battery shell;

[0027] Step 3: Two laser welding guns are driven by two multi-axis welding robots to weld the battery shells clamped on the two fixture mounting plates on the welding support flip mechanism on one side of the multi-axis welding robot. The flip drive motor drives the flip drive wheel to rotate, driving the connecting mounting frame and the two fixture mounting plates and the two battery shells clamped on the fixture mounting plates to flip, and cooperate with the multi-axis welding robot to perform welding;

[0028] Step 4: When the multi-axis welding robot is welding the two battery shells on the welding support flip mechanism on one side, the welding workpiece of the battery shell is removed and clamped on the welding support flip mechanism on the other side.

[0029] The beneficial effects of the present invention are:

[0030] 1. By setting up two laser welding equipment, two multi-axis welding robots, two welding support flipping mechanisms and two double-station clamping mechanisms, when in use, the two battery shells are welded and clamped by the double-station clamping mechanism, and the two multi-axis welding robots drive the two laser welding guns to move, and weld the battery shells on the two stations. At the same time, when welding different angles and different surfaces of the battery shell, the welding support flipping mechanism drives the battery shell to move and weld, realizing automatic clamping and automatic welding of two battery shells at one time, thereby solving the problems of low automation and welding efficiency and large welding deformation of the battery shell welding device.

[0031] 2. By setting up a double-station clamping mechanism, when in use, the fixed clamping cylinder, the fixed clamping limit cylinder, the bottom shell limit clamping cylinder and the adjustable pneumatic clamping mechanism are used to drive the fixed clamping head, the fixed limit clamping head, the bottom shell clamping fixture and the movable clamping head to perform welding and fixing clamping on the welding battery shell, and the fixed clamping cylinder, the fixed clamping limit cylinder, the bottom shell limit clamping cylinder and the adjustable pneumatic clamping mechanism are installed on the fixture mounting plate using a detachable and movable installation method such as bolts, which is convenient for installation and adjustment according to different types of battery shells when welding, thereby achieving the effect of automatically clamping different types of battery shells. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of a dual-station battery shell automatic welding device and welding method proposed by the present invention;

[0033] Figure 2 A three-dimensional diagram of the structure of a multi-axis welding robot for a dual-station battery shell automatic welding device and welding method proposed in the present invention;

[0034] Figure 3 A three-dimensional diagram of the fixed base structure of a dual-station battery shell automatic welding device and welding method proposed in the present invention;

[0035] Figure 4 A three-dimensional diagram of the fixture mounting plate structure of a dual-station battery shell automatic welding device and welding method proposed in the present invention;

[0036] Figure 5 A three-dimensional diagram of the bottom shell limiting clamping cylinder structure of a dual-station battery shell automatic welding device and welding method proposed in the present invention;

[0037] Figure 6 This is a three-dimensional diagram of the stroke cylinder structure of a double-station battery shell automatic welding device and welding method proposed by the present invention.

[0038] In the figure: 1. Laser welding equipment; 2. Multi-axis welding robot; 3. Laser welding gun; 4. Fixed base; 401. Support box column; 402. Flip driving wheel; 403. Connecting mounting frame; 5. Clamp mounting plate; 501. Battery shell welding pad; 502. Battery shell welding limit angle plate; 503. Fixed clamping cylinder; 504. Fixed clamping limit cylinder; 505. Bottom shell limit clamping cylinder; 506. Fixed clamping gas rod; 507. Fixed chuck; 508. Limiting articulated seat; 509. Fixed clamping limit gas rod; 510. Fixed limit chuck; 511. Bottom shell clamping fixture; 512. Stroke cylinder; 513. Stroke gas rod; 514. Moving cylinder seat; 515. Stroke guide rail; 516. Moving clamping cylinder; 517. Moving clamping gas rod; 518. Chuck frame; 519. Moving chuck. Implementation Method

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example 1

[0040] Reference Figure 1-6 A double-station battery shell automatic welding device includes a laser welding device 1 and a multi-axis welding robot 2, and the two laser welding devices 1 correspond to the two multi-axis welding robots 2.

[0041] The two multi-axis welding robots 2 are located on the same horizontal line. A laser welding gun 3 is fixedly installed at one end of the multi-axis welding robot 2 , and the laser welding gun 3 is connected to the laser welding equipment 1 .

[0042] When in use, the laser welding gun 3 is connected to the laser welding device 1, and the laser welding gun 3 is driven by the multi-axis welding robot 2 to perform automated laser welding on the battery shell.

[0043] Welding support flipping mechanisms are provided on both sides of the multi-axis welding robot 2 , and a double-station clamping mechanism is provided on the surface of the welding support flipping mechanism.

[0044] Among them, the welding support flipping mechanism is used to provide support for the double-station clamping mechanism, and drive the double-station clamping mechanism and the battery shell to perform flip welding.

[0045] The welding support flipping mechanism includes a fixed base 4 , on the upper surface of which support box columns 401 are fixedly mounted by bolts, and the two support box columns 401 are symmetrically arranged with the axis of the fixed base 4 as the center.

[0046] The surface of the supporting box column 401 is rotatably connected to the flip driving wheel 402 through bearings and rotating shafts, and a flip driving motor is fixedly installed on the surface of one of the supporting box columns 401, and the output shaft of the flip driving motor is fixedly connected to one of the flip driving wheels 402 through a key and a keyway.

[0047] When in use, the output shaft of the flip drive motor drives one of the flip drive wheels 402 to rotate via the key and the keyway.

[0048] A connecting mounting frame 403 is provided on the surface of the flip driving wheel 402 , and both ends of the connecting mounting frame 403 are fixedly connected to the surfaces of the two flip driving wheels 402 by bolts.

[0049] When in use, the connection mounting frame 403 is supported by the two flip driving wheels 402 , and the flip driving motor drives one flip driving wheel 402 to rotate, thereby driving the connection mounting frame 403 and the other flip driving wheel 402 to rotate.

[0050] When in use, the connecting mounting frame 403 connects the two flip driving wheels 402 and provides an installation basis for the double-station clamping mechanism.

[0051] Among them, the double-station clamping mechanism is used for clamping and positioning welding of the battery shell.

[0052] The double-station clamping mechanism includes a fixture mounting plate 5 , which is fixedly mounted on the surface of the connecting mounting frame 403 . The two fixture mounting plates 5 are symmetrically distributed around the axis of the connecting mounting frame 403 .

[0053] When in use, the fixture mounting plate 5 is used to provide a supporting platform for the battery shell and the fixture when welding the battery shell.

[0054] The upper surface of the fixture mounting plate 5 is fixedly connected with a battery shell welding pad 501 and a battery shell welding limiting angle plate 502 by bolts, and multiple battery shell welding pads 501 correspond to multiple battery shell welding limiting angle plates 502. The multiple battery shell welding pads 501 and the multiple battery shell welding limiting angle plates 502 are symmetrically distributed with the axis of the welded battery shell as the center.

[0055] The surface of the battery shell welding limiting angle plate 502 is L-shaped.

[0056] When in use, the battery shell is supported by a plurality of battery shell welding pads 501 when being welded.

[0057] When in use, the plurality of battery shell welding limiting angle plates 502 cooperate with the plurality of battery shell welding pads 501 to limit the shell components during battery shell welding.

[0058] A fixed clamping cylinder 503 , a fixed clamping limit cylinder 504 , a bottom shell limit clamping cylinder 505 and an adjustable pneumatic clamping mechanism are fixedly mounted on the surface of the fixture mounting plate 5 .

[0059] The two fixed clamping cylinders 503 are symmetrically distributed with the axis of the welding battery shell as the center. The two fixed clamping cylinders 503 are both located on one side of the welding battery shell. The fixed clamping cylinder 503 includes a fixed clamping gas rod 506, and a fixed clamp 507 is fixedly installed at one end of the fixed clamping gas rod 506.

[0060] During use, the fixed clamping gas rod 506 extends from the fixed clamping cylinder 503 to drive the fixed clamping head 507 to move and contact the surface of the welded battery shell to clamp the welded battery shell.

[0061] Multiple fixed clamping limit cylinders 504 are respectively located on the four sides of the welded battery shell. The surface of the fixed clamping limit cylinder 504 is fixedly installed with a limit hinge seat 508 by bolts. The fixed clamping limit cylinder 504 includes a fixed clamping limit gas rod 509, and a fixed limit clamp 510 is fixedly installed at one end of the fixed clamping limit gas rod 509.

[0062] The surface of the fixed limiting clamp 510 is hinged to the surface of the limiting hinge seat 508 .

[0063] During use, the fixed clamping limit gas rod 509 extends from the fixed clamping limit cylinder 504, driving the fixed limit clamp 510 to move around the connection of the limit hinge seat 508, driving the fixed limit clamp 510 to move and contact the welded battery shell, limiting the welded battery shell, and cooperating with the battery shell welding pad 501 and the battery shell welding limit angle plate 502 to limit and clamp the welded battery shell.

[0064] The two bottom shell limiting clamping cylinders 505 correspond to the two fixed clamping cylinders 503 , and the surface of the bottom shell limiting clamping cylinders 505 is installed with a bottom shell clamping fixture 511 , which is fixedly connected to the surface of the fixture mounting plate 5 through a supporting angle plate.

[0065] When in use, the two bottom shell limiting clamping cylinders 505 drive the two bottom shell clamping fixtures 511 to move, so as to perform clamping and limiting welding on the bottom plate of the welded battery shell.

[0066] The adjustable pneumatic clamping mechanism includes a stroke cylinder 512 , and four stroke cylinders 512 are symmetrically distributed with the axis of the fixture mounting plate 5 as the center.

[0067] The stroke cylinder 512 includes a stroke gas rod 513, one end of which is fixedly mounted with a movable cylinder seat 514, and the surface of the fixture mounting plate 5 is fixedly mounted with a stroke guide rail 515, and the surface of the movable cylinder seat 514 is slidably connected to the surface of the stroke guide rail 515.

[0068] A mobile clamping cylinder 516 is fixedly installed on the surface of the mobile cylinder seat 514, and the mobile clamping cylinder 516 includes a mobile clamping gas rod 517. A chuck frame 518 is fixedly installed on the surface of the mobile clamping cylinder 516, and a mobile chuck 519 is slidably connected to the inner wall of the chuck frame 518. One end of the mobile clamping gas rod 517 is fixedly connected to the surface of the mobile chuck 519.

[0069] By setting up a double-station clamping mechanism, when in use, the fixed clamping cylinder 503, the fixed clamping limit cylinder 504, the bottom shell limit clamping cylinder 505 and the adjustable pneumatic clamping mechanism drive the fixed clamp 507, the fixed limit clamp 510, the bottom shell clamping fixture 511 and the movable clamp 519 to perform welding and fixed clamping on the welded battery shell, and the fixed clamping cylinder 503, the fixed clamping limit cylinder 504, the bottom shell limit clamping cylinder 505 and the adjustable pneumatic clamping mechanism are installed on the fixture mounting plate 5 using a detachable and movable installation method such as bolts, so that it is convenient to perform installation and adjustment according to different types of battery shells when welding, thereby achieving the effect of automatically clamping different types of battery shells.

[0070] By setting up two laser welding equipment 1, two multi-axis welding robots 2, two welding support flipping mechanisms and two double-station clamping mechanisms, when in use, the two battery shells are welded and clamped by the double-station clamping mechanism, and the two multi-axis welding robots 2 drive the two laser welding guns 3 to move, and weld the battery shells on the two stations. At the same time, when welding different angles and different surfaces of the battery shell, the welding support flipping mechanism drives the battery shell to move and weld, so that the two battery shells can be automatically clamped and welded at one time, thereby solving the problems of low automation and welding efficiency and large welding deformation of the battery shell welding device. Example 2

[0071] Reference Figure 1-6 , a welding method of a double-station battery shell automatic welding device, comprising the following steps:

[0072] Step 1: Place the battery shell to be welded on four fixture mounting plates 5, and support and position the battery shell by the battery shell welding pads 501 and the battery shell welding limiting angle plates 502 on the fixture mounting plates 5.

[0073] Step 2: Use the fixed clamping cylinder 503, the fixed clamping limit cylinder 504, the bottom shell limit clamping cylinder 505 and the adjustable pneumatic clamping mechanism to drive the fixed clamp 507, the fixed limit clamp 510, the bottom shell clamping fixture 511 and the movable clamp 519 to weld and fix the battery shell.

[0074] Step 3: Use two multi-axis welding robots 2 to drive the two laser welding guns 3 to move, and weld the battery shells clamped on the two fixture mounting plates 5 on the welding support flipping mechanism located on one side of the multi-axis welding robot 2. The flip driving motor drives the flip driving wheel 402 to rotate, driving the connecting mounting frame 403 and the two fixture mounting plates 5 as well as the two battery shells clamped on the fixture mounting plates 5 to flip, and cooperate with the multi-axis welding robot 2 to perform welding.

[0075] Step 4: When the multi-axis welding robot 2 is welding the two battery shells on the welding support flipping mechanism on one side, the welding workpiece of the battery shell is removed and clamped on the welding support flipping mechanism on the other side.

[0076] By setting up two laser welding equipment 1, two multi-axis welding robots 2, two welding support flipping mechanisms and two double-station clamping mechanisms, when in use, the two battery shells are welded and clamped by the double-station clamping mechanism, and the two multi-axis welding robots 2 drive the two laser welding guns 3 to move, and weld the battery shells on the two stations. At the same time, when welding different angles and different surfaces of the battery shell, the welding support flipping mechanism drives the battery shell to move and weld, so that the two battery shells can be automatically clamped and welded at one time, thereby solving the problems of low automation and welding efficiency and large welding deformation of the battery shell welding device.

[0077] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A dual-station battery shell automatic welding device, comprising a laser welding device (1) and a multi-axis welding robot (2), characterized in that: The two laser welding devices (1) correspond to the two multi-axis welding robots (2); The two multi-axis welding robots (2) are located on the same horizontal straight line, a laser welding gun (3) is fixedly mounted on one end of the multi-axis welding robot (2), and the laser welding gun (3) is connected to the laser welding device (1); Both sides of the multi-axis welding robot (2) are provided with welding support flipping mechanisms, and the surface of the welding support flipping mechanism is provided with a double-station clamping mechanism; Among them, the welding support flipping mechanism is used to provide support for the double-station clamping mechanism and drive the double-station clamping mechanism and the battery shell to perform flip welding; Wherein, a double-station clamping mechanism is used for clamping and positioning welding of a battery shell, the double-station clamping mechanism comprises a clamp mounting plate (5), the clamp mounting plate (5) is fixedly mounted on the surface of a connecting mounting frame (403), the two clamp mounting plates (5) are symmetrically distributed with the axis of the connecting mounting frame (403) as the center, the upper surface of the clamp mounting plate (5) is fixedly connected with a battery shell welding pad (501) and a battery shell welding limiting angle plate (502) by bolts, a plurality of the battery shell welding pads (501) and a plurality of the battery shell welding limiting angle plates (502) correspond to each other, and the plurality of the battery shell welding pads (501) and the plurality of the battery shell welding limiting angle plates (502) are symmetrically distributed with the axis of the welding battery shell as the center; The surface of the battery shell welding limiting angle plate (502) is L-shaped, and the surface of the clamp mounting plate (5) is respectively fixedly mounted with a fixed clamping cylinder (503), a fixed clamping limiting cylinder (504), a bottom shell limiting clamping cylinder (505) and an adjustable pneumatic clamping mechanism; The two fixed clamping cylinders (503) are symmetrically distributed with the axis of the welding battery shell as the center. The two fixed clamping cylinders (503) are both located on one side of the welding battery shell. The fixed clamping cylinder (503) includes a fixed clamping gas rod (506), and one end of the fixed clamping gas rod (506) is fixedly installed with a fixed clamp (507). The multiple fixed clamping limit cylinders (504) are respectively located on four sides of the welding battery shell. The surface of the fixed clamping limit cylinder (504) is fixedly installed with a limit hinge seat (508) by bolts. The fixed clamping limit cylinder (504) includes a fixed clamping limit gas rod (509), and one end of the fixed clamping limit gas rod (509) is fixedly installed with a fixed limit clamp (510). The surface of the fixed limiting clamp (510) is hinged to the surface of the limiting hinge seat (508), the two bottom shell limiting clamping cylinders (505) correspond to the two fixed clamping cylinders (503), the surface of the bottom shell limiting clamping cylinder (505) is installed with a bottom shell clamping fixture (511), the bottom shell clamping fixture (511) is fixedly connected to the surface of the fixture mounting plate (5) through a supporting angle plate, and the adjustable pneumatic clamping mechanism includes a stroke cylinder (512), and the four stroke cylinders (512) are symmetrically distributed with the axis of the fixture mounting plate (5) as the center; The stroke cylinder (512) includes a stroke gas rod (513), one end of the stroke gas rod (513) is fixedly mounted with a movable cylinder seat (514), a surface of the fixture mounting plate (5) is fixedly mounted with a stroke guide rail (515), and the surface of the movable cylinder seat (514) is slidably connected to the surface of the stroke guide rail (515); A movable clamping cylinder (516) is fixedly mounted on the surface of the movable cylinder seat (514), and the movable clamping cylinder (516) includes a movable clamping gas rod (517). A chuck frame (518) is fixedly mounted on the surface of the movable clamping cylinder (516), and a movable chuck (519) is slidably connected to the inner wall of the chuck frame (518), and one end of the movable clamping gas rod (517) is fixedly connected to the surface of the movable chuck (519).

2. A dual-station battery shell automatic welding device according to claim 1, characterized in that: The welding support flip mechanism comprises a fixed base (4), the upper surface of the fixed base (4) is fixedly mounted with a support box column (401) by means of bolts, and the two support box columns (401) are symmetrically distributed with the axis of the fixed base (4) as the center; The surface of the support box column (401) is rotatably connected to a flip drive wheel (402) via a bearing and a rotating shaft, a flip drive motor is fixedly mounted on the surface of one of the support box columns (401), and the output shaft of the flip drive motor is fixedly connected to one of the flip drive wheels (402) via a key and a keyway.

3. A dual-station battery shell automatic welding device according to claim 2, characterized in that: A connecting mounting frame (403) is provided on the surface of the flip driving wheel (402), and both ends of the connecting mounting frame (403) are fixedly connected to the surfaces of the two flip driving wheels (402) via bolts.

4. The welding method of a double-station battery shell automatic welding device according to claim 3, characterized in that: The following steps are involved: Step 1: Place the battery shell to be welded on four fixture mounting plates (5), and support and position the battery shell by the battery shell welding pads (501) and the battery shell welding limiting angle plates (502) on the fixture mounting plates (5); Step 2: The fixed clamping cylinder (503), the fixed clamping limit cylinder (504), the bottom shell limit clamping cylinder (505) and the adjustable pneumatic clamping mechanism drive the fixed clamp (507), the fixed limit clamp (510), the bottom shell clamping fixture (511) and the movable clamp (519) to perform welding and fixing clamping on the welded battery shell; Step 3: two laser welding guns (3) are driven by two multi-axis welding robots (2) to move, and the battery shells clamped on the two fixture mounting plates (5) on the welding support flip mechanism located on one side of the multi-axis welding robot (2) are welded, and the flip driving wheel (402) is driven to rotate by the flip driving motor, thereby driving the connecting mounting frame (403) and the two fixture mounting plates (5) as well as the two battery shells clamped on the fixture mounting plates (5) to flip, and cooperate with the multi-axis welding robot (2) to perform welding; Step 4: When the multi-axis welding robot (2) is welding the two battery shells on the welding support flip mechanism on one side, the welding workpiece of the battery shell is removed and clamped on the welding support flip mechanism on the other side.

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