CN114769967A

CN114769967A - Fuel cell bipolar plate runner welding device

Info

Publication number: CN114769967A
Application number: CN202210526408.7A
Authority: CN
Inventors: 沈万中; 蔡卓龙; 徐阿生; 刘若颖
Original assignee: Zhejiang Haiyan Power System Resources Environmental Technology Co ltd
Current assignee: Zhejiang Haiyan Power System Resources Environmental Technology Co ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-07-22
Anticipated expiration: 2042-05-16
Also published as: CN114769967B

Abstract

The invention discloses a fuel cell bipolar plate flow channel welding device, and relates to the technical field of cell bipolar plates. Including carriage and two supporting shoes, the cover is equipped with the landing leg on the carriage, bipolar plate has been placed on the supporting shoe, the bipolar plate periphery is equipped with the protecting crust, there is first motor on the protecting crust, install first band pulley and second band pulley on the protecting crust, first band pulley passes through the belt with the second band pulley and is connected, the second band pulley has first connecting axle, first connecting axle articulates there is first pivot pole, first pivot pole articulates there is first slider, first slider cover is equipped with removes the frame, there is first rack on the protecting crust, first rack toothing has first gear, first gear runs through there is the pivot, the pivot cover is equipped with the second slider, the pivot cover is equipped with the riser, the pivot has the kicking block, be equipped with welding mechanism on the riser. The invention can weld from two sides simultaneously.

Description

Fuel cell bipolar plate runner welding device

Technical Field

The invention belongs to the technical field of battery bipolar plates, and particularly relates to a fuel battery bipolar plate flow channel welding device.

Background

During the operation of the proton exchange membrane fuel cell, liquid water is continuously generated in a gas flow channel inside the electric pile, and if the liquid water is accumulated on the surface of an electrode, the gas transfer resistance is increased, the concentration polarization is increased, and the performance of the electric pile is reduced. Therefore, liquid water needs to be continuously drained out of the galvanic pile in time during operation. The gas flow channel of the bipolar plate in the conventional fuel cell is not specially optimized for the drainage performance, so that the water accumulation phenomenon is always generated, and therefore, a plurality of narrowed throats are arranged in the gas flow channel on the bipolar plate, the flow velocity of gas passing through the throats is increased, and the liquid water in the flow channel is blown out. At present, a fuel cell bipolar plate flow channel is generally assembled in a welding mode, but due to the fact that the shapes of the fuel cell bipolar plate flow channel are different, welding is difficult, and precision is not easy to guarantee.

The utility model discloses a chinese utility model patent that publication number is CN215034894U discloses a welding bench for welding fuel cell bipolar plate, including bottom plate and motor, the top of bottom plate is provided with the welding extension board, one side fixedly connected with rotary drum of bottom plate, and the one end of rotary drum is inserted and is equipped with the lead screw, the surface cover of lead screw is equipped with the screw, the motor is installed to one side of rotary drum, the one end of motor output shaft is connected through the bevel gear transmission with one side of screw, four face angles all fixedly connected with sleeves on bottom plate top, and telescopic one end all insert and be equipped with the movable rod, and the device makes the adjustment weld height that the user can be convenient, adapts to different installation environment, reduces the limitation when the device uses, and easy operation can be convenient fixes bipolar plate, prevents that among the welding process, leads to bipolar plate because of external force collision and to appear the skew.

However, the device cannot adapt to the flow channel welding of the bipolar plate with the narrowing throat, cannot simultaneously weld from two sides, and has certain limitation.

Disclosure of Invention

The technical problem to be solved by the present invention is to overcome the above disadvantages of the prior art, and to provide a fuel cell bipolar plate flow channel welding device.

The technical scheme for solving the technical problems is as follows:

a fuel cell bipolar plate runner welding device comprises a sliding frame and two supporting blocks, wherein a plurality of supporting legs are sleeved on the sliding frame, bipolar plates are placed on the supporting blocks, a protective shell is arranged on the periphery of the bipolar plates, a first motor is fixedly connected onto the protective shell, a first belt wheel and a second belt wheel are installed on the protective shell, the output shaft of the first motor is fixedly connected with the first belt wheel, the first belt wheel is connected with the second belt wheel through a belt, a first connecting shaft is fixedly connected onto the second belt wheel, the first connecting shaft is hinged with a first rotating rod, the first rotating rod is hinged with a first sliding block, a moving frame is sleeved on the first sliding block, the first sliding block and the moving frame are in sliding connection, a first rack is fixedly connected onto the protective shell, a first gear is meshed with the first rack, a rotating shaft penetrates through the first gear, and the first gear is fixedly connected with the rotating shaft, the pivot cover is equipped with the second slider and rotates between the two to be connected, the second slider with remove a fixed connection, the second slider is in the protecting crust goes up to slide, the pivot cover is equipped with the riser and rotates between the two to be connected, the riser with protecting crust fixed connection, pivot fixedly connected with kicking block, be equipped with welding mechanism on the riser, first band pulley with be equipped with coupling mechanism and moving mechanism between the bipolar plate, bipolar plate with be equipped with transmission device between the carriage.

Further, welding mechanism includes two guide bars, two the guide bar all with riser fixed connection, fixedly connected with bracing piece on the riser, fixedly connected with fixed block on the bracing piece, the fixed block has the disc through torsional spring connection, the eccentric articulated two second dwangs that have of disc, the second dwang articulates there is the sliding block, the sliding block is inserted and is located sliding connection between guide bar and the two, fixedly connected with welder, one of them on the sliding block fixedly connected with ejector pad.

Further, the connecting mechanism comprises a second connecting shaft and a third connecting shaft, the second connecting shaft is fixedly connected with the first belt wheel, the second connecting shaft is inserted in the protective shell and is rotatably connected with the protective shell, the second connecting shaft is sleeved with a second gear and is fixedly connected with the second gear, the third connecting shaft is sleeved with a third gear and is fixedly connected with the third gear, a first supporting plate is fixedly connected with the protective shell, a second motor is fixedly connected with the first supporting plate, an output shaft of the second motor is fixedly connected with a third rotating rod, the third rotating rod is sleeved with a fourth gear and is rotatably connected with the fourth gear, both ends of the third rotating rod are rotatably connected with a fourth rotating rod through a first connecting rod, the first connecting rod is sleeved with a fifth gear and is rotatably connected with the fifth gear, the fourth rotating rod is inserted with a second connecting rod and is rotatably connected with the second connecting rod, the second connecting rod cover is equipped with sixth gear and rotates between the two and be connected, second connecting rod fixedly connected with third slider, the third slider is in slide in the first backup pad, two the fifth gear all with fourth gear engagement, the sixth gear with fifth gear engagement, one of them the sixth gear with second gear engagement, another one the sixth gear with third gear engagement.

Furthermore, the moving mechanism includes two fourth connecting shafts, the fourth connecting shafts are inserted into the protective casing and rotatably connected therebetween, the fourth connecting shafts are sleeved with a first bevel gear and a seventh gear, the first bevel gear and the seventh gear are both fixedly connected with the fourth connecting shafts, the seventh gear is engaged with a second rack, the second rack is fixedly connected with the bipolar plate, the third connecting shafts are inserted into the protective casing and rotatably connected therebetween, the third connecting shafts are sleeved with a second bevel gear and fixedly connected therebetween, and the second bevel gear is engaged with the first bevel gear.

Furthermore, the transfer mechanism comprises two second support plates and two transfer frames, the two second support plates and the two transfer frames correspond to the two sliding frames one by one, one of the second support plates is fixedly connected with a third motor, an output shaft of the third motor is fixedly connected with a first transmission shaft, the first transmission shaft is rotatably connected with the second support plates, the first transmission shaft is sleeved with three eighth gears, the eighth gears are fixedly connected with the first transmission shaft, one of the eighth gears is meshed with a gear ring, the other two eighth gears correspond to the two sliding frames, the gear ring is meshed with a ninth gear, the ninth gear is fixedly connected with a second transmission shaft, the second transmission shaft is rotatably connected with the second support plates, and the second transmission shaft is sleeved with two tenth gears, the two tenth gears correspond to the two sliding frames, and the two ninth gears and the two tenth gears are all meshed with the transfer frame.

The invention has the following beneficial effects:

(1) the welding gun device adopts a first motor, a first belt wheel, a second belt wheel, a belt, a first connecting shaft, a first rotating rod, a first sliding block, a moving frame, a first rack, a first gear, a rotating shaft, a second sliding block, a vertical plate, a top block, a guide rod, a supporting rod, a fixing block, a disc, a second rotating rod, a sliding block, welding guns and a pushing block.

(2) The bipolar plate welding machine adopts the fourth connecting shaft, the first bevel gear, the second bevel gear, the seventh gear and the second rack, the second rack is driven to move by the second bevel gear, the first bevel gear, the fourth connecting shaft and the seventh gear, the bipolar plate is driven to move by the second rack, the bipolar plate can be intermittently moved until the whole bipolar plate is welded, manual operation is not needed, and the bipolar plate welding machine is flexible and convenient.

(3) According to the invention, the second connecting shaft, the third connecting shaft, the second motor, the third rotating rod, the fourth rotating rod, the second gear, the third gear, the fourth gear, the fifth gear, the sixth gear and the third sliding block are adopted, so that the power of the output shaft of the first motor can be transmitted to the second bevel gear, the linkage between the mechanisms is improved, the second rack and the second bipolar plate can be controlled to move or be interrupted according to actual conditions, and the device is flexible and convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of a fuel cell bipolar plate flow channel welding device according to the present invention.

Fig. 2 is a schematic diagram of a second view structure of fig. 1.

Fig. 3 is a schematic view of the structure of fig. 1 with the protective shell and the connecting mechanism removed.

Fig. 4 is a structural schematic diagram of the welding mechanism.

Fig. 5 is a schematic diagram of a second perspective structure of fig. 4.

Fig. 6 is a schematic view of the connection mechanism.

Fig. 7 is a second perspective structural view of fig. 6.

Fig. 8 is a schematic view of the transfer mechanism.

Fig. 9 is a second perspective structural view of fig. 8.

Fig. 10 is an enlarged view of the structure at a in fig. 9.

Reference numerals: 1. a carriage; 2. a support block; 3. a welding mechanism; 31. a guide rod; 32. a support bar; 33. a fixed block; 34. a disc; 35. a second rotating lever; 36. a slider; 37. a welding gun; 38. a push block; 39. a torsion spring; 4. a connecting mechanism; 401. a second connecting shaft; 402. a third connecting shaft; 403. a second gear; 404. a third gear; 405. a first support plate; 406. a second motor; 407. a third rotating rod; 408. a fourth gear; 409. a first link; 410. a fourth rotating rod; 411. a fifth gear; 412. a second link; 413. a sixth gear; 414. a third slider; 5. a moving mechanism; 51. a fourth connecting shaft; 52. a seventh gear; 53. a first bevel gear; 54. a second rack; 55. a second bevel gear; 6. a transfer mechanism; 61. a second support plate; 62. a transfer rack; 63. a third motor; 64. a first transmission shaft; 65. an eighth gear; 66. a ring gear; 67. a ninth gear; 68. a second transmission shaft; 69. a tenth gear; 7. a support leg; 8. a protective shell; 9. a first motor; 10. a belt; 11. a first connecting shaft; 12. a first rotating lever; 13. a first slider; 14. a movable frame; 15. a first rack; 16. a first gear; 17. a rotating shaft; 18. a second slider; 19. a vertical plate; 20. a top block; 21. a bipolar plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

As shown in fig. 1 and fig. 2, a fuel cell bipolar plate flow channel welding device of the present embodiment is formed by coupling a sliding frame 1, a supporting block 2, a supporting leg 7, a bipolar plate 21, a protective shell 8, a first motor 9, a first pulley, a second pulley, a belt 10, a first connecting shaft 11, a first rotating rod 12, a first slider 13, a moving frame 14, a first rack 15, a first gear 16, a rotating shaft 17, a second slider 18, a top block 20, a welding mechanism 3, a connecting mechanism 4, a moving mechanism 5, and a transmission mechanism 6.

As shown in fig. 1 and fig. 2, a fuel cell bipolar plate 21 flow channel welding device comprises a sliding frame 1 and two supporting blocks 2, wherein the sliding frame 1 is sleeved with a plurality of supporting legs 7, the number of the supporting legs 7 in the drawing is four, the sliding frame 1 slides in the supporting legs 7 in the horizontal direction, the supporting legs 7 support the sliding frame 1, bipolar plates 21 are placed on the supporting blocks 2, a protective shell 8 is arranged on the periphery of the bipolar plates 21, the protective shell 8 can improve the safety of the device, a first motor 9 is fixedly connected to the protective shell 8, a first belt wheel and a second belt wheel are mounted on the protective shell 8, the first belt wheel and the second belt wheel are not marked in the drawing, an output shaft of the first motor 9 is fixedly connected with the first belt wheel, the first belt wheel is connected with the second belt wheel through a belt 10, an output shaft of the first motor 9 drives the belt 10 to move through the first belt wheel, the belt 10 drives the second belt wheel to rotate, the second belt wheel is fixedly connected with a first connecting shaft 11, the first connecting shaft 11 is hinged with a first rotating rod 12, the first rotating rod 12 is hinged with a first sliding block 13, the first sliding block 13 is sleeved with a moving frame 14 and is in sliding connection with the moving frame 14, concretely, a sliding groove is arranged on the moving frame 14, the first sliding block 13 can slide in the sliding groove, a first rack 15 is fixedly connected with the protective shell 8, the first rack 15 is meshed with a first gear 16, the first gear 16 is penetrated with a rotating shaft 17 and is fixedly connected with the rotating shaft 17, the rotating shaft 17 is sleeved with a second sliding block 18 and is in rotating connection with the rotating shaft 18, the second sliding block 18 is fixedly connected with the moving frame 14, the second sliding block 18 slides on the protective shell 8, concretely, a guide groove is arranged on the protective shell 8, the second sliding block 18 can drive the rotating shaft 17 to rotate while sliding on the guide groove, the rotating shaft 17 is sleeved with a vertical plate 19 and is in rotating connection with the vertical plate, a vertical plate 19 is fixedly connected with the protective shell 8, a rotating shaft 17 is fixedly connected with a top block 20, a bulge is arranged on the top block 20, as shown in figure 3, a welding mechanism 3 is arranged on the vertical plate 19, a connecting mechanism 4 and a moving mechanism 5 are arranged between a first belt wheel and a bipolar plate 21, and a transmission mechanism 6 is arranged between the bipolar plate 21 and the sliding frame 1.

As shown in fig. 4 and 5, the welding mechanism 3 includes two guide rods 31, the two guide rods 31 are both fixedly connected to a vertical plate 19, a support rod 32 is fixedly connected to the vertical plate 19, a fixed block 33 is fixedly connected to the support rod 32, the support rod 32 and the fixed block 33 support a disc 34, the fixed block 33 is connected to the disc 34 through a torsion spring 39, the torsion spring 39 can ensure that the disc 34 can be restored after rotating, the disc 34 is eccentrically hinged to two second rotating rods 35, the two second rotating rods 35 are parallel to each other, the second rotating rods 35 are hinged to sliding blocks 36, the sliding blocks 36 are inserted into the guide rods 31 and slidably connected therebetween, the two sliding blocks 36 can move along the axis of the guide rods 31 in opposite directions on the guide rods 31, the sliding blocks 36 are fixedly connected to a welding gun 37, one of the sliding blocks 36 is fixedly connected with a pushing block 38, and the pushing block 20 drives the sliding block 36 to move by pushing the pushing block 38.

As shown in fig. 6 and 7, the connecting mechanism 4 includes a second connecting shaft 401 and a third connecting shaft 402, the second connecting shaft 401 is fixedly connected to the first pulley, the second connecting shaft 401 is inserted into the protective shell 8 and rotatably connected therebetween, the second connecting shaft 401 is sleeved with a second gear 403 and fixedly connected therebetween, the third connecting shaft 402 is sleeved with a third gear 404 and fixedly connected therebetween, the protective shell 8 is fixedly connected with a first supporting plate 405, the first supporting plate 405 is fixedly connected with a second motor 406, an output shaft of the second motor 406 is fixedly connected with a third rotating rod 407, the third rotating rod 407 is sleeved with a fourth gear 408 and rotatably connected therebetween, the output shaft of the second motor 406 does not drive the fourth gear 408 to rotate, both ends of the third rotating rod 407 are rotatably connected with a fourth rotating rod 410 through a first connecting rod 409, the first connecting rod 409 is sleeved with a fifth gear 411 and rotatably connected therebetween, the fourth rotating rod 410 is inserted with a second connecting rod 412 which is rotatably connected with the second connecting rod 412, the second connecting rod 412 is sleeved with a sixth gear 413 which is rotatably connected with the sixth gear 413, the second connecting rod 412 is fixedly connected with a third sliding block 414, the third sliding block 414 slides in the first supporting plate 405, the two fifth gears 411 are respectively meshed with the fourth gear 408, the sixth gear 413 is meshed with the fifth gear 411, one of the sixth gears 413 is meshed with the second gear 403, and the other sixth gear 413 is meshed with the third gear 404.

As shown in fig. 3 and 8, the moving mechanism 5 includes two fourth connecting shafts 51, the fourth connecting shafts 51 are inserted into the protective housing 8 and rotatably connected therebetween, the fourth connecting shafts 51 are sleeved with a first bevel gear 53 and a seventh gear 52, the first bevel gear 53 and the seventh gear 52 are both fixedly connected with the fourth connecting shafts 51, the seventh gear 52 is engaged with a second rack 54, the second rack 54 is fixedly connected with the bipolar plate 21, the third connecting shaft 402 is inserted into the protective housing 8 and rotatably connected therebetween, the third connecting shaft 402 is sleeved with a second bevel gear 55 and fixedly connected therebetween, the second bevel gear 55 is engaged with the first bevel gear 53, the first bevel gear 53 is a complete bevel gear, the second bevel gear 55 is an incomplete bevel gear, when the teeth of the second bevel gear 55 are engaged with the first bevel gear 53, the first bevel gear 53 can be driven to rotate, otherwise, the first bevel gear 53 cannot be driven to rotate.

As shown in fig. 9 and 10, the transmission mechanism 6 includes two second supporting plates 61 and two transmission frames 62, the two second supporting plates 61 and the two transmission frames 62 correspond to the two sliding frames 1 one by one, the transmission frames 62 have a tooth, one of the second supporting plates 61 is fixedly connected with a third motor 63, an output shaft of the third motor 63 is fixedly connected with a first transmission shaft 64, the first transmission shaft 64 is rotatably connected with the second supporting plate 61, the first transmission shaft 64 is sleeved with three eighth gears 65, the eighth gears 65 are fixedly connected with the first transmission shaft 64, one of the eighth gears 65 is engaged with a gear ring 66, the other two eighth gears 65 correspond to the two sliding frames 1, the gear ring 66 is engaged with a ninth gear 67, the ninth gear 67 is fixedly connected with a second transmission shaft 68, the second transmission shaft 68 is rotatably connected with the second supporting plate 61, the second transmission shaft 68 is provided with two tenth gears 69, two tenth gears 69 correspond to the two carriages 1, and the two ninth gears 67 and the two tenth gears 69 are each engaged with the transfer frame 62.

The working principle of the embodiment is as follows:

(1) when the device works, the device is assembled, the first motor 9 is started, the output shaft of the first motor 9 drives the first belt wheel to move, the first belt wheel drives the second belt wheel to rotate through the belt 10, the second belt wheel drives the first rotating rod 12 to move, the first rotating rod 12 drives the first sliding block 13 to move, the first sliding block 13 drives the moving frame 14 to move while sliding in the moving frame 14, the moving frame 14 drives the first sliding block 13 to slide on the protective shell 8, the first sliding block 13 drives the first gear 16 to move, the first gear 16 moves on the first rack 15, the first gear 16 drives the rotating shaft 17 to rotate, the rotating shaft 17 drives the top block 20 to move, the top block 20 pushes the pushing block 38 to move, the pushing block 38 drives the sliding block 36 connected with the pushing block to move, the sliding block 36 drives the second rotating rod 35 connected with the sliding block 36 to move on the guide rod 31, one second rotating rod 35 drives the other second rotating rod 35 to move through the disc 34, the other second rotating rod 35 drives the connected slide blocks 36 to slide on the guide rod 31, so that the two slide blocks 36 move to the side close to each other, and welding is performed simultaneously from both sides by the welding guns 37 on the slide blocks 36.

(2) An output shaft of the first motor 9 drives the first belt pulley and simultaneously drives the second connecting shaft 401 to rotate, the second connecting shaft 401 drives the second gear 403 to rotate, the second gear 403 drives the sixth gear 413 engaged therewith to rotate, the sixth gear 413 drives the fifth gear 411 engaged therewith to rotate, the fifth gear 411 drives the fourth gear 408 to rotate, the fourth gear 408 drives the other fifth gear 411 to rotate, the fifth gear 411 drives the other sixth gear 413 to rotate, the sixth gear 413 drives the third gear 404 to rotate, the third gear 404 drives the third connecting shaft 402 to rotate, the third connecting shaft 402 drives the second bevel gear 55 to rotate, the second bevel gear 55 is engaged with the first bevel gear 53, the second bevel gear 55 drives the first bevel gear 53 to rotate, the first bevel gear 53 drives the fourth connecting shaft 51 to rotate, the fourth connecting shaft 51 drives the seventh gear 52 to rotate, the seventh gear 52 moves the second rack 54, and the second rack 54 moves the bipolar plate 21 in the horizontal direction.

(3) The third motor 63 is started, the output shaft of the third motor 63 drives the eighth gear 65 to rotate, the eighth gear 65 drives the gear ring 66 to rotate, the eighth gear 65 drives the first transmission shaft 64 to rotate, the first transmission shaft 64 drives the other two eighth gears 65 to rotate, the gear ring 66 drives the ninth gear 67 to rotate, the ninth gear 67 drives the second transmission shaft 68 to rotate, the second transmission shaft 68 drives the two tenth gears 69 to rotate, the two eighth gears 65 and the two tenth gears 69 are all meshed with the gear teeth on the transmission frame 62, the movable frame 14 is driven by the eighth gear 65 and the tenth gear 69 to move on the sliding frame 1 along the vertical direction, and the bipolar plates 21 are sequentially transmitted forwards.

(4) When the first bevel gear 53 and the second bevel gear 55 need to be disconnected, the second motor 406 is started, the output shaft of the second motor 406 drives the third rotating rod 407 to move, the third rotating rod 407 drives the fourth rotating rod 410 to move through the first connecting rod 409, the first connecting rod 409 drives the fifth gear 411 to move, the fourth rotating rod 410 drives the second connecting rod 412 to move, the second connecting rod 412 drives the third slider 414 to slide in the first supporting plate 405, the second connecting rod 412 drives the sixth gear 413 to move, the sixth gear 413 meshed with the third gear 404 drives the third gear 404 to rotate, the third gear 404 drives the third connecting shaft 402 to rotate, the third connecting shaft 402 drives the second bevel gear 55 to rotate, the second bevel gear 55 is separated from the first bevel gear 53, and therefore when the output shaft of the first motor 9 rotates, the second rack 54 cannot move along with the output shaft.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A fuel cell bipolar plate runner welding device is characterized in that: comprises a sliding frame (1) and two supporting blocks (2), wherein the sliding frame (1) is sleeved with a plurality of supporting legs (7), bipolar plates (21) are placed on the supporting blocks (2), protective shells (8) are arranged on the peripheries of the bipolar plates (21), first motors (9) are fixedly connected to the protective shells (8), first belt wheels and second belt wheels are installed on the protective shells (8), output shafts of the first motors (9) are fixedly connected with the first belt wheels, the first belt wheels are connected with the second belt wheels through belts (10), first connecting shafts (11) are fixedly connected with the second belt wheels, the first connecting shafts (11) are hinged with first rotating rods (12), the first rotating rods (12) are hinged with first sliding blocks (13), the first sliding blocks (13) are sleeved with a moving frame (14) and are in sliding connection with the moving frame (14), the utility model discloses a welding machine, including protective housing (8), first rack (15) of fixedly connected with on protective housing (8), first rack (15) meshing has first gear (16), first gear (16) run through pivot (17) and fixed connection between the two, pivot (17) cover is equipped with second slider (18) and rotates between the two to be connected, second slider (18) with remove frame (14) fixed connection, second slider (18) are in protective housing (8) goes up to slide, pivot (17) cover is equipped with riser (19) and rotates between the two to be connected, riser (19) with protective housing (8) fixed connection, pivot (17) fixedly connected with kicking block (20), be equipped with welding mechanism (3) on riser (19), first band pulley with be equipped with coupling mechanism (4) and moving mechanism (5) between bipolar plate (21), a transmission mechanism (6) is arranged between the bipolar plate (21) and the sliding frame (1).

2. A fuel cell bipolar plate flow channel welding apparatus as claimed in claim 1, wherein: welding mechanism (3) include two guide bars (31), two guide bar (31) all with riser (19) fixed connection, fixedly connected with bracing piece (32) is gone up in riser (19), fixedly connected with fixed block (33) is gone up in bracing piece (32), fixed block (33) are connected with disc (34) through torsional spring (39), disc (34) eccentric articulated have two second dwang (35), second dwang (35) articulate has sliding block (36), sliding block (36) are inserted and are located guide bar (31) and sliding connection between the two, fixedly connected with welder (37), one of them on sliding block (36) fixedly connected with ejector pad (38).

3. A fuel cell bipolar plate flow channel welding apparatus as claimed in claim 1, wherein: the connecting mechanism (4) comprises a second connecting shaft (401) and a third connecting shaft (402), the second connecting shaft (401) is fixedly connected with the first belt wheel, the second connecting shaft (401) is inserted into the protective shell (8) and is rotatably connected with the protective shell (8) and the protective shell, the second connecting shaft (401) is sleeved with a second gear (403) and is fixedly connected with the second gear, the third connecting shaft (402) is sleeved with a third gear (404) and is fixedly connected with the third gear, a first supporting plate (405) is fixedly connected with the protective shell (8), a second motor (406) is fixedly connected with the first supporting plate (405), a third rotating rod (406) is fixedly connected with a third rotating rod (407) through an output shaft, the third rotating rod (407) is sleeved with a fourth gear (408) and is rotatably connected with the fourth gear, and both ends of the third rotating rod (407) are rotatably connected with a fourth rotating rod (410) through a first connecting rod (409), first connecting rod (409) cover is equipped with fifth gear (411) and rotates between the two to be connected, fourth dwang (410) are inserted and are equipped with second connecting rod (412) and rotate between the two to be connected, second connecting rod (412) cover is equipped with sixth gear (413) and rotate between the two to be connected, second connecting rod (412) fixedly connected with third slider (414), third slider (414) are in slide in first backup pad (405), two fifth gear (411) all with fourth gear (408) meshing, sixth gear (413) with fifth gear (411) meshing, one of them sixth gear (413) with second gear (403) meshing, the other sixth gear (413) with third gear (404) meshing.

4. A fuel cell bipolar plate flow channel welding apparatus as claimed in claim 3, wherein: the moving mechanism (5) comprises two fourth connecting shafts (51), the fourth connecting shafts (51) are inserted into the protective shell (8) and are in rotating connection with the protective shell, a first bevel gear (53) and a seventh gear (52) are sleeved on the fourth connecting shafts (51), the first bevel gear (53) and the seventh gear (52) are both fixedly connected with the fourth connecting shafts (51), the seventh gear (52) is meshed with a second rack (54), the second rack (54) is fixedly connected with the bipolar plate (21), the third connecting shafts (402) are inserted into the protective shell (8) and are in rotating connection with the protective shell, a second bevel gear (55) is sleeved on the third connecting shafts (402) and is fixedly connected with the protective shell, and the second bevel gear (55) is meshed with the first bevel gear (53).

5. A fuel cell bipolar plate flow channel welding apparatus as claimed in claim 1, wherein: the transmission mechanism (6) comprises two second supporting plates (61) and two transmission frames (62), the two second supporting plates (61) and the two transmission frames (62) are in one-to-one correspondence with the two sliding frames (1), one of the second supporting plates (61) is fixedly connected with a third motor (63), an output shaft of the third motor (63) is fixedly connected with a first transmission shaft (64), the first transmission shaft (64) is rotatably connected with the second supporting plates (61), the first transmission shaft (64) is sleeved with three eighth gears (65), the eighth gears (65) are fixedly connected with the first transmission shaft (64), one of the eighth gears (65) is meshed with a gear ring (66), the other two eighth gears (65) correspond to the two sliding frames (1), and the gear ring (66) is meshed with a ninth gear (67), ninth gear (67) fixedly connected with second transmission shaft (68), second transmission shaft (68) with second backup pad (61) rotates and connects, the cover is equipped with two tenth gear (69) on second transmission shaft (68), two tenth gear (69) and two carriage (1) corresponds, two ninth gear (67), two tenth gear (69) all with transmission frame (62) meshing.