A welding device and method for a power battery explosion-proof valve

Abstract

The present invention discloses a power battery explosion-proof valve welding device and welding method. The present invention relates to the field of power battery manufacturing technology, comprising a base, a welding seat fixed on the top of the base, a placement groove provided on the top of the welding seat, an explosion-proof valve body provided in the placement groove, and a rotation transposition stop mechanism provided on the welding seat for driving the explosion-proof valve body to perform intermittent rotational transposition. The power battery explosion-proof valve welding device and welding method, through the provision of the rotation transposition stop mechanism, realizes the automatic rotation and stop of the explosion-proof valve body. When one part of the explosion-proof valve body is welded, the explosion-proof valve body is driven to rotate automatically to achieve transposition welding, and stays for a period of time, and the welding operation is performed during this period. The entire transposition process is fully automated, and no manual transposition operation is required, thereby improving welding efficiency and ensuring the consistency and stability of welding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery manufacturing, and in particular to a welding device and a welding method for a power battery explosion-proof valve. Background Art

[0002] With the rapid development of the new energy vehicle industry, the safety of power batteries has become increasingly important. As a key safety component of power batteries, the quality of the weld between the explosion-proof valve and the battery casing directly affects the safety and service life of the battery.

[0003] In the existing technology, there are many deficiencies in the welding of power battery explosion-proof valves:

[0004] (1) The explosion-proof valve needs to be manually adjusted during the welding process. Traditional welding equipment has a low degree of automation and a high reliance on manual operation, resulting in low welding efficiency. The welding quality is greatly affected by the worker's operating level, making it difficult to ensure the consistency and stability of the welding quality.

[0005] (2) In the welding process of power battery explosion-proof valves, if the residual welding slag is not cleaned up in time after welding, the molten welding slag will be firmly adhered to the explosion-proof valve shell after cooling and solidification. This kind of solid welding slag is not only tightly attached but also difficult to remove, which can easily damage the surface structure of the explosion-proof valve, affect its sealing and safety performance, and may even cause the explosion-proof valve to fail, seriously threatening the safety and life of the power battery.

[0006] To solve this problem, we propose a power battery explosion-proof valve welding device and welding method. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides a welding device and a welding method for a power battery explosion-proof valve, which solve the problems raised in the background art.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a power battery explosion-proof valve welding device, comprising a base, a welding seat fixed to the top of the base, a placement groove formed on the top of the welding seat, an explosion-proof valve body disposed in the placement groove, and a rotational transposition stop mechanism provided on the welding seat for driving the explosion-proof valve body to intermittently rotate and transpose;

[0009] The rotation transposition stop mechanism includes a rotating rod rotatably connected to one side of the inner wall of the welding seat, one end of the rotating rod is fixed with a first bevel gear, a vertical rod is rotatably connected to the bottom wall of the welding seat, a second bevel gear is fixed on the vertical rod, the first bevel gear is meshed with the second bevel gear, a turntable is fixed on the top of the vertical rod, the other end of the rotating rod extends to the outside of the welding seat, a ratchet is fixed to the other end of the rotating rod, and a driving component that drives the ratchet to intermittently rotate 90 degrees is provided on one side of the welding seat.

[0010] Preferably, the driving assembly includes two mounting blocks fixed on one side of the welding seat, a driving rod is slidably connected between the inner surfaces of the two mounting blocks, a circular plate is fixed to the top end of the driving rod, a U-shaped plate is fixed to the bottom end of the driving rod, and a clamping block is rotatably connected between the opposite sides of the inner wall of the U-shaped plate through a torsion spring, and the bottom of the clamping block is engaged with the teeth of the ratchet.

[0011] Preferably, a baffle is fixed on the driving rod, a spring 1 is sleeved on the driving rod, the top end of the spring 1 is fixed to the bottom of the baffle, the bottom end of the spring 1 is fixed to the top of the mounting block, a vertical plate is fixed on one side of the welding seat, one side of the vertical plate is rotatably connected to a cross bar, a cam is fixed at one end of the cross bar, the side surface of the cam is in contact and extruded with the top of the circular plate, a motor is fixed on one side of the vertical plate, pulleys are fixed on the output end of the motor and the cross bar, and the two pulleys are connected by belt transmission.

[0012] Preferably, a scraping assembly is also provided on the welding seat, and the scraping assembly is used to scrape off the welding slag on the explosion-proof valve body shell. The scraping assembly includes a rotating plate rotatably connected to one side of the welding seat through a rotating shaft, a block is fixed on one side of the ratchet, a transmission rod is fixed on one side of the rotating plate, a fixing plate is fixed on the top of the base, a spring is fixed on the top of the fixing plate, one side of the spring is in contact and extrusion with the side surface of the block, and the other side of the spring is in contact and extrusion with one end of the transmission rod, a mounting seat is fixed on the top of the welding seat, and a T-slot is provided on the top of the mounting seat.

[0013] Preferably, the inner surface of the T-slot is slidably connected with a T-block, and a moving rod is fixed to one side of the T-block, one end of the moving rod passes through the mounting seat and extends to the outside of the mounting seat, and a spring 2 is sleeved on the outer surface of the moving rod, one end of the spring 2 is fixed to the inner wall of the T-slot, and the other end of the spring 2 is fixed to one side of the T-block, and a vertical plate is fixed to the top of the vertical plate, and a supporting plate is fixed to the top of the vertical plate, a transmission plate is fixed to one side of the supporting plate, and a push rod is fixed to one side of the rotating plate, one end of the push rod is in contact and extruded with one side of the transmission plate, and a scraper is fixed to the top of the supporting plate.

[0014] Preferably, a cooling and slag blowing assembly is provided on the mounting seat, and the cooling and slag blowing assembly is used to quickly blow away the scraped welding slag and cool the explosion-proof valve body. The cooling and slag blowing assembly includes a side plate fixed to the top of the mounting seat, an L-shaped plate is fixed to one end of the movable rod, a rack is fixed to one side of the L-shaped plate, a side plate is rotatably connected to one side of the side plate, a driving gear is fixed on the side rod, the driving gear is engaged with the rack, a rotating wheel is fixed to one end of the side rod, and a fan blade is fixed to the rotating wheel.

[0015] Preferably, two support columns are fixed on the top of the base, a top plate is fixed between the tops of the two support columns, a cylinder is fixed on the top of the top plate, a slide rail is installed on one side of the two support columns, a slide seat is slidably connected between the two slide rails, the output end of the cylinder is fixed to the top of the slide seat, a welding frame is fixed on the bottom of the slide seat, a clamping block is fixed on one side of the welding frame, and a welding gun is clamped in the clamping block.

[0016] The present invention also discloses a welding method for a power battery explosion-proof valve welding device, which specifically includes the following steps:

[0017] Step 1: Place the explosion-proof valve body in the placement slot so that the explosion-proof valve body is on the top of the turntable, start the cylinder, and drive the welding gun downward to weld the explosion-proof valve body and the battery shell. Start the motor, and the motor drives the cam to rotate. The cam squeezes the circular plate and drives the drive rod to move downward, thereby squeezing the compression spring 1. The drive rod drives the clamping block to move downward. The clamping block acts on the teeth of the ratchet, driving the ratchet to rotate a quarter turn, and then the ratchet drives the turntable and the explosion-proof valve body to rotate a quarter turn, thereby realizing the rotation transposition of the explosion-proof valve body.

[0018] Step 2: When the ratchet rotates, it drives the block to rotate synchronously, and then the block drives the spring piece to squeeze and pop out to the right, and then the spring piece squeezes the transmission rod to move to the right, and the transmission rod drives the rotating plate to rotate, and the rotating plate drives the ejector rod to squeeze the transmission plate to move to the left, and then the transmission plate drives the scraper to move to the left and contact the welding part of the explosion-proof valve body. The rotation of the explosion-proof valve body is used to make the scraper scrape off the welding slag;

[0019] Step 3: When the transmission plate moves to the left, it drives the T-shaped seat to slide to the left in the T-shaped slot, and then drives the moving rod, L-shaped plate and rack to move to the left, and then the rack drives the driving gear to rotate, and then drives the fan blades to rotate, blowing air to cool the welding area after scraping off the welding slag, and further blow away some fine welding slag.

[0020] Beneficial effects

[0021] The present invention provides a welding device and method for a power battery explosion-proof valve. Compared with the prior art, it has the following advantages:

[0022] (1) Through the setting of the rotation transposition stop mechanism, the explosion-proof valve body is automatically rotated and stopped. When one part of the explosion-proof valve body is welded, the explosion-proof valve body is driven to rotate automatically to realize transposition welding and stop for a period of time. The welding operation is performed during this period. The entire transposition process is fully automated and no manual transposition operation is required, which improves the welding efficiency and ensures the consistency and stability of the welding quality.

[0023] (2) Through the setting of the scraper assembly, when the explosion-proof valve body is driven by the rotary transposition stop mechanism to rotate, the rotary transposition stop mechanism synchronously drives the scraper assembly to work, and uses the scraper to approach the welding part of the explosion-proof valve body. The explosion-proof valve body rotates and the scraper automatically scrapes off the welding slag, thereby realizing the function of timely and rapid removal of welding slag after welding. There is no need to wait for the entire welding of the explosion-proof valve body to be completed before removing the slag, which avoids the molten welding slag from being firmly adhered to the explosion-proof valve shell after cooling and solidification. Moreover, during welding, the scraper can automatically leave the explosion-proof valve body for reset, which is highly flexible.

[0024] (3) By setting up the cooling slag blowing component and linking it with the slag scraping component, when the slag scraping component is working, it can synchronously drive the fan blades to rotate and fan the air, thereby blowing and cooling the welding area after the slag is scraped off, and further blowing away some fine slag, further improving the slag removal effect and accelerating the cooling after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The external structure of the present invention is three-dimensional Figure 1 ;

[0026] Figure 2 The external structure of the present invention is three-dimensional Figure 2 ;

[0027] Figure 3 is a cross-sectional view of the welding seat of the present invention;

[0028] Figure 4 This is a three-dimensional diagram of the explosion-proof valve body and drive assembly of the present invention;

[0029] Figure 5 A perspective view of a scraping assembly according to the present invention;

[0030] Figure 6 For the present invention Figure 5 A partial enlarged view of point A in the middle;

[0031] Figure 7 A three-dimensional diagram of the cooling and slag blowing assembly of the present invention;

[0032] Figure 8 It is a partial structural stereogram of the present invention.

[0033] In the figure: 1. Base; 2. Welding seat; 3. Placement groove; 4. Explosion-proof valve body; 5. Rotation transposition stop mechanism; 6. Drive assembly; 7. Slag scraping assembly; 8. Cooling slag blowing assembly; 9. Support column; 10. Top plate; 11. Cylinder; 12. Slide rail; 13. Slide seat; 14. Welding frame; 15. Clamp; 16. Welding gun; 51. Rotating rod; 52. First bevel gear; 53. Vertical rod; 54. Second bevel gear; 55. Turntable; 56. Ratchet; 61. Mounting block; 62. Drive rod; 63. Round plate; 64. U-shaped plate; 65. Block; 66. Baffle; 67. Spring ; 68. Vertical plate; 69. Horizontal bar; 610. Cam; 611. Motor; 612. Pulley; 613. Belt; 71. Rotating shaft; 72. Rotating plate; 73. Block; 74. Transmission rod; 75. Fixed plate; 76. Shrapnel; 77. Mounting seat; 78. T-slot; 79. T-block; 710. Moving rod; 711. Spring 2; 712. Vertical plate; 713. Support plate; 714. Transmission plate; 715. Push rod; 716. Scraper; 81. Side plate; 82. L-shaped plate; 83. Rack; 84. Side rod; 85. Drive gear; 86. Rotating wheel; 87. Fan blade. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 work are within the scope of protection of the present invention. The embodiments of the present invention provide three technical solutions, specifically including the following embodiments:

[0035] Example 1

[0036] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 8 A power battery explosion-proof valve welding device includes a base 1, a welding seat 2 is fixed on the top of the base 1, the welding seat 2 is a hollow design, a placement groove 3 is opened on the top of the welding seat 2, and the explosion-proof valve body 4 is arranged in the placement groove 3. The size of the placement groove 3 is slightly larger than the size of the explosion-proof valve body 4. The welding seat 2 is provided with a rotation transposition stop mechanism 5 that drives the explosion-proof valve body 4 to perform intermittent rotation transposition;

[0037] The rotation, transposition and stop mechanism 5 includes a rotating rod 51 rotatably connected to one side of the inner wall of the welding seat 2, one end of the rotating rod 51 is fixed with a first bevel gear 52, a vertical rod 53 is rotatably connected to the bottom wall of the welding seat 2, a second bevel gear 54 is fixed on the vertical rod 53, the first bevel gear 52 is meshed with the second bevel gear 54, a turntable 55 is fixed to the top of the vertical rod 53, the explosion-proof valve body 4 is placed on the top of the turntable 55, the other end of the rotating rod 51 extends to the outside of the welding seat 2, the other end of the rotating rod 51 is fixed with a ratchet 56, the ratchet 56 is provided with four teeth, and one side of the welding seat 2 is provided with a driving component 6 that drives the ratchet 56 to intermittently rotate 90 degrees.

[0038] The driving assembly 6 includes two mounting blocks 61 fixed to one side of the welding seat 2, and a driving rod 62 is slidably connected between the inner surfaces of the two mounting blocks 61. A circular plate 63 is fixed to the top of the driving rod 62, and a U-shaped plate 64 is fixed to the bottom end of the driving rod 62. A clamping block 65 is rotatably connected between the opposite sides of the inner wall of the U-shaped plate 64 through a torsion spring. The setting of the torsion spring allows the clamping block 65 to rotate slightly around the center part of the U-shaped plate 64. The bottom of the clamping block 65 is engaged with the teeth of the ratchet 56. Each time the clamping block 65 squeezes the teeth of the ratchet 56, it can drive the teeth to rotate 90 degrees.

[0039] A baffle 66 is fixed on the driving rod 62, and a spring 67 is sleeved on the driving rod 62. The spring 67 is set to drive the driving rod 62 to reset. The top of the spring 67 is fixed to the bottom of the baffle 66, and the bottom of the spring 67 is fixed to the top of the mounting block 61. A vertical plate 68 is fixed to one side of the welding seat 2, and a cross bar 69 is rotatably connected to one side of the vertical plate 68. A cam 610 is fixed to one end of the cross bar 69. The side surface of the cam 610 contacts and squeezes the top of the circular plate 63. A motor 611 is fixed to one side of the vertical plate 68. The motor 611 is controlled by an external switch and is electrically connected to an external power supply. After the motor 611 is started, it can drive the cam 610 to rotate, and the cam 610 intermittently squeezes the circular plate 63, so that a pulley 612 is fixed to the output end of the motor 611 and the cross bar 69, and the two pulleys 612 are connected by a belt 613.

[0040] By setting up the rotation transposition stop mechanism 5, the automatic rotation stop of the explosion-proof valve body 4 is realized. When one welding of the explosion-proof valve body 4 is completed, the explosion-proof valve body 4 is driven to rotate automatically to realize transposition welding, and stay for a period of time, and the welding operation is performed during this time. The entire transposition process is fully automated, and no manual transposition operation is required, which improves the welding efficiency and ensures the consistency and stability of the welding quality.

[0041] Two support columns 9 are fixed on the top of the base 1, and a top plate 10 is fixed between the tops of the two support columns 9. A cylinder 11 is fixed on the top of the top plate 10, and the cylinder 11 is controlled by an external switch and electrically connected to an external power supply. A slide rail 12 is installed on one side of the two support columns 9, and a slide seat 13 is slidably connected between the two slide rails 12. The output end of the cylinder 11 is fixed to the top of the slide seat 13, and a welding frame 14 is fixed to the bottom of the slide seat 13. A clamping block 15 is fixed on one side of the welding frame 14, and a welding gun 16 is clamped in the clamping block 15. The welding gun 16 is controlled by an external switch and electrically connected to an external power supply. The welding gun 16 is a prior art and can weld the explosion-proof valve body 4 and the battery shell after startup.

[0042] Example 2

[0043] Based on Example 1, see Figure 5-Figure 7 As shown, a scraping assembly 7 is also provided on the welding seat 2, and the scraping assembly 7 is used to scrape off the welding slag on the shell of the explosion-proof valve body 4. The scraping assembly 7 includes a rotating plate 72 that is rotatably connected to one side of the welding seat 2 through a rotating shaft 71. A torsion spring is provided in the rotating shaft 71. The torsion spring is provided to drive the rotating plate 72 to reset. A block 73 is fixed to one side of the ratchet 56, and a transmission rod 74 is fixed to one side of the rotating plate 72. A fixing plate 75 is fixed to the top of the base 1, and a spring is fixed to the top of the fixing plate 75. 76. The spring piece 76 is made of metal elastic material. One side of the spring piece 76 contacts and squeezes the side surface of the block 73. When the block 73 is driven to rotate by the ratchet 56, the top corner of the block 73 squeezes the spring piece 76 to pop out to the right. The other side of the spring piece 76 contacts and squeezes one end of the transmission rod 74. After the spring piece 76 pops out to the right, it squeezes the transmission rod 74 and drives the rotating plate 72 to rotate. A mounting seat 77 is fixed on the top of the welding seat 2, and a T-slot 78 is provided on the top of the mounting seat 77.

[0044] The inner surface of the T-slot 78 is slidably connected with a T-block 79, and the size of the T-block 79 is adapted to that of the T-slot 78. A moving rod 710 is fixed to one side of the T-block 79. One end of the moving rod 710 passes through the mounting seat 77 and extends to the outside of the mounting seat 77. A spring 2 711 is sleeved on the outer surface of the moving rod 710. The spring 2 711 is set to reset the T-block 79, driving one end of the spring 2 711 to be fixed to the inner wall of the T-slot 78, and the other end of the spring 2 711 is fixed to the T One side of the block 79 is fixed, a vertical plate 712 is fixed to the top of the T-block 79, a supporting plate 713 is fixed to the top of the vertical plate 712, a transmission plate 714 is fixed to one side of the supporting plate 713, a push rod 715 is fixed to one side of the rotating plate 72, one end of the push rod 715 is in contact and extrusion with one side of the transmission plate 714, a scraper 716 is fixed to the top of the supporting plate 713, and after the scraper 716 moves close to the welding part of the explosion-proof valve body 4, the high-temperature welding slag generated during welding can be quickly scraped off.

[0045] Through the setting of the scraper assembly 7, when the explosion-proof valve body 4 is driven by the rotation transposition stop mechanism 5 to rotate, the rotation transposition stop mechanism 5 synchronously drives the scraper assembly 7 to work, and uses the scraper 716 to approach the welding point of the explosion-proof valve body 4. The rotation of the explosion-proof valve body 4 is used to cooperate with the scraper 716 to automatically scrape off the welding slag, thereby realizing the function of timely and rapid removal of welding slag after welding is completed. There is no need to wait for the entire welding of the explosion-proof valve body 4 to be completed before removing the slag, which avoids the molten welding slag from being firmly adhered to the explosion-proof valve shell after cooling and solidifying. Moreover, during welding, the scraper can automatically leave the explosion-proof valve body 4 for reset, which is highly flexible.

[0046] A cooling and slag blowing assembly 8 is provided on the mounting seat 77. The cooling and slag blowing assembly 8 is used to quickly blow away the scraped welding slag and cool the explosion-proof valve body 4. The cooling and slag blowing assembly 8 includes a side plate 81 fixed to the top of the mounting seat 77, an L-shaped plate 82 is fixed to one end of the movable rod 710, a rack 83 is fixed to one side of the L-shaped plate 82, and a side rod 84 is rotatably connected to one side of the side plate 81. A driving gear 85 is fixed on the side rod 84, and the driving gear 85 is engaged with the rack 83. A runner 86 is fixed to one end of the side rod 84, and a fan blade 87 is fixed on the runner 86. The fan blade 87 is set to rotate and blow air to the welding position to blow away the fine welding slag and quickly cool it down.

[0047] By setting up the cooling and slag blowing component 8, it is linked with the slag scraping component 7. When the slag scraping component 7 is working, it can synchronously drive the fan blades 87 to rotate to fan the air, thereby blowing and cooling the welding area after the welding slag is scraped off, and further blowing away some fine welding slag, further improving the welding slag removal effect and accelerating the cooling after welding.

[0048] Example 3

[0049] Based on Example 2, see Figures 1-8 As shown, the present invention also discloses a welding method for a power battery explosion-proof valve welding device, which specifically includes the following steps:

[0050] Step 1: Place the explosion-proof valve body 4 in the placement groove 3 so that the explosion-proof valve body 4 is located on the top of the turntable 55, start the cylinder 11, and drive the welding gun 16 downward to weld the explosion-proof valve body 4 to the battery shell, start the motor 611, and the motor drives the cam 610 to rotate. The cam 610 squeezes the circular plate 63 and drives the drive rod 62 to move downward, thereby squeezing the compression spring 1 67. The drive rod 62 drives the block 65 to move downward. The block 65 acts on the teeth of the ratchet 56, driving the ratchet 56 to rotate a quarter of a turn, and then the ratchet drives the turntable 55 and the explosion-proof valve body 4 to rotate a quarter of a turn, thereby realizing the rotation transposition of the explosion-proof valve body 4;

[0051] Step 2: When the ratchet 56 rotates, it drives the block 73 to rotate synchronously, and then the block 73 drives the spring piece 76 to be squeezed and ejected to the right, and then the spring piece 76 squeezes the transmission rod 74 to move to the right, and the transmission rod 74 drives the rotating plate 72 to rotate, and the rotating plate 72 drives the push rod 715 to squeeze the transmission plate 714 to move to the left, and then the transmission plate 714 drives the scraper 716 to move to the left and contact the welding part of the explosion-proof valve body 4. The rotation of the explosion-proof valve body 4 is used to make the scraper 716 scrape off the welding slag;

[0052] Step 3: When the transmission plate 714 moves to the left, it drives the T-shaped seat to slide to the left in the T-shaped slot 78, thereby driving the moving rod 710, the L-shaped plate 82 and the rack 83 to move to the left, and then the rack 83 drives the driving gear 85 to rotate, thereby driving the fan blades to rotate, blowing air to cool the welding area after scraping off the welding slag, and further blowing away some fine welding slag.

[0053] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0054] The above embodiments of the invention are described in detail, but the contents are only preferred embodiments of the invention and should not be considered to limit the scope of the invention. All equivalent changes and improvements made within the scope of the invention should still fall within the scope of the invention.

Claims

1. A power battery explosion-proof valve welding device, comprising a base (1), characterized in that: A welding seat (2) is fixed on the top of the base (1), a placement groove (3) is provided on the top of the welding seat (2), an explosion-proof valve body (4) is provided in the placement groove (3), and a rotation transposition stop mechanism (5) is provided on the welding seat (2) for driving the explosion-proof valve body (4) to perform intermittent rotation transposition; The rotation transposition stop mechanism (5) includes a rotating rod (51) rotatably connected to one side of the inner wall of the welding seat (2), a first bevel gear (52) is fixed to one end of the rotating rod (51), a vertical rod (53) is rotatably connected to the bottom wall of the welding seat (2), a second bevel gear (54) is fixed to the vertical rod (53), the first bevel gear (52) is meshed with the second bevel gear (54), a rotating disk (55) is fixed to the top of the vertical rod (53), the other end of the rotating rod (51) extends to the outside of the welding seat (2), a ratchet (56) is fixed to the other end of the rotating rod (51), and a driving component (6) is provided on one side of the welding seat (2) for driving the ratchet (56) to intermittently rotate 90 degrees; The welding seat (2) is also provided with a scraping assembly (7), which is used to scrape off the welding slag on the shell of the explosion-proof valve body (4). The scraping assembly (7) includes a rotating plate (72) rotatably connected to one side of the welding seat (2) through a rotating shaft (71), a block (73) is fixed on one side of the ratchet (56), a transmission rod (74) is fixed on one side of the rotating plate (72), a fixing plate (75) is fixed on the top of the base (1), a spring (76) is fixed on the top of the fixing plate (75), one side of the spring (76) is in contact and extrusion with the side surface of the block (73), and the other side of the spring (76) is in contact and extrusion with one end of the transmission rod (74), a mounting seat (77) is fixed on the top of the welding seat (2), a T-slot (78) is provided on the top of the mounting seat (77), and the inner surface of the T-slot (78) is slidably connected to the mounting seat (77). A T-shaped block (79) is provided with a moving rod (710) fixed on one side of the T-shaped block (79), one end of the moving rod (710) passes through the mounting seat (77) and extends to the outside of the mounting seat (77), a second spring (711) is sleeved on the outer surface of the moving rod (710), one end of the second spring (711) is fixed to the inner wall of the T-shaped slot (78), and the other end of the second spring (711) is fixed to one side of the T-shaped block (79), a vertical plate (712) is fixed on the top of the vertical plate (712), a supporting plate (713) is fixed on one side of the supporting plate (713), a transmission plate (714) is fixed on one side, a push rod (715) is fixed on one side of the rotating plate (72), one end of the push rod (715) contacts and presses with one side of the transmission plate (714), and a scraper (716) is fixed on the top of the supporting plate (713).

2. A power battery explosion-proof valve welding device according to claim 1, characterized in that: The driving assembly (6) comprises two mounting blocks (61) fixed on one side of the welding seat (2), a driving rod (62) is slidably connected between the inner surfaces of the two mounting blocks (61), a circular plate (63) is fixed to the top end of the driving rod (62), a U-shaped plate (64) is fixed to the bottom end of the driving rod (62), a clamping block (65) is rotatably connected between the opposite sides of the inner wall of the U-shaped plate (64) via a torsion spring, and the bottom of the clamping block (65) is engaged with the teeth of the ratchet (56).

3. A power battery explosion-proof valve welding device according to claim 2, characterized in that: A baffle (66) is fixed on the driving rod (62), and a spring (67) is sleeved on the driving rod (62). The top end of the spring (67) is fixed to the bottom of the baffle (66), and the bottom end of the spring (67) is fixed to the top of the mounting block (61). A vertical plate (68) is fixed to one side of the welding seat (2), and a horizontal bar (69) is rotatably connected to one side of the vertical plate (68). A cam (610) is fixed to one end of the horizontal bar (69), and the side surface of the cam (610) contacts and presses against the top of the circular plate (63). A motor (611) is fixed to one side of the vertical plate (68).

4. A power battery explosion-proof valve welding device according to claim 3, characterized in that: A pulley (612) is fixed on the output end of the motor (611) and the crossbar (69), and the two pulleys (612) are connected to each other through a belt (613). A cooling slag blowing assembly (8) is provided on the mounting seat (77), and the cooling slag blowing assembly (8) is used to quickly blow away the scraped welding slag and cool the explosion-proof valve body (4). The cooling slag blowing assembly (8) includes a side plate (81) fixed to the top of the mounting seat (77), an L-shaped plate (82) is fixed to one end of the moving rod (710), a rack (83) is fixed to one side of the L-shaped plate (82), and a side plate (84) is rotatably connected to one side of the side plate (81), and a driving gear (85) is fixed to the side plate (84).

5. A power battery explosion-proof valve welding device according to claim 4, characterized in that: The driving gear (85) is meshed with the rack (83), a rotating wheel (86) is fixed to one end of the side rod (84), a fan blade (87) is fixed to the rotating wheel (86), two supporting columns (9) are fixed to the top of the base (1), a top plate (10) is fixed between the tops of the two supporting columns (9), a cylinder (11) is fixed to the top of the top plate (10), a slide rail (12) is installed on one side of the two supporting columns (9), a slide seat (13) is slidably connected between the two slide rails (12), an output end of the cylinder (11) is fixed to the top of the slide seat (13), a welding frame (14) is fixed to the bottom of the slide seat (13), a clamping block (15) is fixed to one side of the welding frame (14), and a welding gun (16) is clamped in the clamping block (15).

6. The welding method of a power battery explosion-proof valve welding device according to claim 5, characterized in that: The specific steps include: Step 1: Place the explosion-proof valve body (4) in the placement groove (3) so that the explosion-proof valve body (4) is located on the top of the turntable (55), start the cylinder (11), and make the cylinder (11) drive the welding gun (16) to move downward to weld the explosion-proof valve body (4) and the battery shell, start the motor (611), and the motor drives the cam (610) to rotate, and the cam (610) squeezes the circular plate (63) and drives the driving rod (62) to move downward, thereby squeezing the compression spring 1 (67), and the driving rod (62) drives the block (65) to move downward, and the block (65) acts on the teeth of the ratchet (56), driving the ratchet (56) to rotate a quarter of a turn, and then the ratchet drives the turntable (55) and the explosion-proof valve body (4) to rotate a quarter of a turn, thereby realizing the rotation transposition of the explosion-proof valve body (4); Step 2: When the ratchet (56) rotates, the block (73) is driven to rotate synchronously, and then the block (73) drives the spring (76) to be squeezed and ejected to the right, and then the spring (76) squeezes the transmission rod (74) to move to the right, and the transmission rod (74) drives the rotating plate (72) to rotate, and the rotating plate (72) drives the top rod (715) to squeeze the transmission plate (714) to move to the left, and then the transmission plate (714) drives the scraper (716) to move to the left and contact the welding part of the explosion-proof valve body (4), and the rotation of the explosion-proof valve body (4) is used to make the scraper (716) scrape off the welding slag; Step 3: When the transmission plate (714) moves to the left, it drives the T-shaped block (79) to slide to the left in the T-shaped slot (78), thereby driving the moving rod (710), the L-shaped plate (82) and the rack (83) to move to the left, and then the rack (83) drives the driving gear (85) to rotate, thereby driving the fan blade to rotate, blowing air to cool the weld after scraping off the welding slag, and further blowing away some fine welding slag.

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