Battery module busbar laser welding device

Abstract

The invention discloses a battery module busbar laser welding device, and relates to the technical field of power module busbar welding, the battery module busbar laser welding device comprises a platen, the two sides of the platen are fixedly connected with side protection plates, the bottom ends of the side protection plates are fixedly connected with a bottom plate, a battery pack is arranged above the platen, a laser welding mechanism is arranged below the platen, and the bottom plate is fixedly connected with the side protection plates. A busbar positioning mechanism is arranged above the battery pack, a protective ventilation mechanism is arranged above the busbar positioning mechanism, a hydraulic rod is fixedly connected to the bottom face of the platen, side cover plates are arranged on the two sides of the protective ventilation mechanism, and the laser welding mechanism comprises a lower push plate. According to the welding device, the lower push plate drives the force buffering plate through the thin connecting rod to extrude the elastic spring to continuously move downwards, so that a battery pack positioning effect is achieved, meanwhile, a laser head is controlled to continuously move downwards to be close to a busbar wire to realize welding, and the welding machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of power module busbar welding, and in particular to a battery module busbar laser welding device. Background Art

[0002] The battery module busbar laser welding device is a device specially used for high-precision welding between the battery pack busbar and the battery cell. The busbar is usually made of metal conductive materials and is used to connect multiple battery cells to form a battery module. In the production process of the battery module, the welding quality of the busbar is crucial to the performance, reliability and safety of the entire battery pack. The battery module busbar laser welding device provides an efficient and reliable solution for the assembly of the battery pack through high-precision laser welding technology. It plays an important role in improving production efficiency, ensuring welding quality and guaranteeing battery pack performance. With the continuous development of battery technology and manufacturing processes, laser welding technology is also continuously improving and innovating to meet the growing demand for batteries.

[0003] The patent with announcement number CN221158974U discloses a battery module busbar laser welding device, including a battery module accommodating device, a busbar pressure plate is installed on the battery module accommodating device, the busbar pressure plate and the battery module accommodating device together form a accommodating cavity for accommodating the battery module, a plurality of clamping members are adjustably installed on the busbar pressure plate along the length direction of the battery module, a clamping structure for clamping the busbar and the battery pole is provided on the clamping member, a through hole for laser to pass through is provided on the clamping structure, and an avoidance groove for avoiding the clamping structure is provided on the busbar pressure plate; a locking structure is provided between the battery module accommodating device and the busbar pressure plate, and the clamping structure of the clamping member installed on the busbar pressure plate is used to clamp the busbar and the battery pole, and the busbar pressure plate and the battery module accommodating device are relatively fixed through the locking structure, thereby solving the problem in the prior art that one busbar pressure plate of the welding device can only adapt to one battery module, but the patent still has the problem that the battery pack fixing step is too complicated and affects the welding wiring efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a battery module busbar laser welding device, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a battery module busbar laser welding device, comprising a platform, side guard plates are fixedly connected to both sides of the platform, the bottom end of the side guard plate is fixedly connected to the bottom plate, a battery pack is arranged above the platform, a laser welding mechanism is arranged below the platform, a busbar positioning mechanism is arranged above the battery pack, a protective ventilation mechanism is arranged above the busbar positioning mechanism, a hydraulic rod is fixedly connected to the bottom surface of the platform, and side cover plates are arranged on both sides of the protective ventilation mechanism; The laser welding mechanism includes a lower push plate, four vertical support rods are fixedly connected to both sides of the top surface of the lower push plate, the top ends of the four vertical support rods are fixedly connected to a lifting frame, four thin connecting rods are fixedly connected to the middle part of the top surface of the lower push plate, the top ends of the four thin connecting rods are fixedly connected to a buffer plate, a side rod connecting plate is arranged between the buffer plate and the lower push plate, the front and rear sides of the side rod connecting plate are both slidably connected to a flip arc arm, wherein the middle positions of two of the flip arc arms are rotatably connected to a rotating shaft fixed seat, and the top end of each flip arc arm is hingedly connected to a positioning clamp.

[0006] According to the above technical solution, the top surface of the lifting frame is fixedly connected to a slide rail, the upper part of the slide rail is slidably connected to an electric drive frame, the inner side of the electric drive frame is slidably connected to a mobile end, the bottom end of the mobile end is fixedly connected to a laser head, the inner side of the mobile end is rotatably connected to a screw, and the inner side of the side cover is fixedly connected to an upper support frame.

[0007] The two ends of the spring are fixedly connected to the buffer plate and the lower push plate respectively, and the screw is rotatably connected to the electric drive frame, and the rotating shaft fixed seat is fixedly connected to the table, and the flip arc arm is slidably connected to the table. When welding, the battery pack needs to be moved to a specified position on the table, and the connected lower push plate is pushed downward by the hydraulic rod in an extended state. The movement of the lower push plate drives the connected vertical support rod and the lifting frame to move downward together, so that the electric drive frame on the lifting frame can slide along the slide rail and adjust the position through the built-in motor wheel, and the connected screw is driven by the built-in motor of the electric drive frame to adjust the position of the moving end on the electric drive frame. When the moving end drives the laser head to adjust the position, the lifting frame moves downward to the battery pack placed on the battery pack. The integrated busbar line is welded to the electrode contact piece on the battery pack through the high temperature generated by the laser head. At the same time, the downward movement of the push plate drives the connected thin connecting rod to pull the buffer plate, so that the buffer plate is compressed by driving the elastic spring downward and pushes the side rod connecting plate to move downward. The side rod connecting plate moves downward and slides along the connection of the flip arc arm, so that the flip arc arms on both sides are rotated around the rotating shaft seat after being stressed. The flipped flip arc arm slides with the table and pushes the connected positioning clamp plate close to the side of the battery pack. While the positioning clamp plate is close to the side of the battery pack to correct the placement position, it can also play a positioning role for the battery pack on the table to prevent the battery pack from being disturbed by the vibration of the mechanical structure and deviating from the original position, affecting the accuracy of the welding position. In addition, after the positioning clamp plate fits the battery pack, the hydraulic rod continues to extend to make the push plate continue to drive the vertical support rod downward, so that the push plate drives the buffer plate to squeeze the elastic spring and continue to move downward through the thin connecting rod.

[0008] According to the above technical solution, the busbar positioning mechanism includes four flip turning rods, and the top of each flip turning rod is fixedly connected with a push-pull rod, and the end of the push-pull rod away from the flip turning rod is slidably connected with a vertical groove folding rod, and the top surface of the vertical groove folding rod is fixedly connected with a displacement block, and the interior of the displacement block is slidably connected with a downward pressure frame, and the upper and lower sides of the downward pressure frame are fixedly connected with convex strips, and the side of the displacement block is fixedly connected with a tie rod, and an insulating belt is provided on the outer side of the displacement block.

[0009] The movable frame is connected to the lifting frame and the lifting frame is connected to the lifting frame, and the movable frame is connected to the lifting frame and the lifting frame is connected to the lifting frame. The movable frame is connected to the lifting frame and the lifting frame is connected to the lifting frame. The movable frame drives the movable frame to move along the movable frame through the movable frame. The movable frame drives the movable frame to move along the movable frame through the movable frame.

[0010] According to the above technical solution, the protective ventilation mechanism includes eight coupling seats, two of the coupling seats are rotatably connected with rollers, four of the rollers are provided with heat-resistant films on the outside, two film supporting rods are fixedly connected to the bottom surface of the electric drive frame, a baffle is provided between the two film supporting rods, and the side wall of the side cover plate is fixedly connected with a ventilation square tube.

[0011] According to the above technical solution, cooling fans are installed at both ends of the front and rear of the ventilation square tube, a sealing strip is fixedly connected to the side of the ventilation square tube, a connecting slide is slidably connected to the inner side of the sealing strip, and a cavity plate is fixedly connected to the front and rear sides of the electric drive frame.

[0012] According to the above technical solution, the front and rear sides of the upper support frame and the lifting frame are fixedly connected to the two coupling seats, the film supporting rod is fixedly connected to the heat-resistant film, the baffle is fixedly connected to the heat-resistant film, and a welding groove is provided on the inner side of the baffle, the connecting slide is slidably connected to the ventilation square tube, and the cavity plate is connected to the connecting slide. When the electric drive frame slides along the slide rail to adjust its position, the connected film supporting rod is driven to move together through the movement of the electric drive frame, and the movement of the film supporting rod drives the connected heat-resistant film to move and move around the four rollers, so that the welding groove on the inner side of the baffle is always below the laser head, and the baffle is used to The sparks generated by the laser head welding the busbar are blocked around the heat-resistant film connected to the baffle. At the same time, the movement of the electric drive frame drives the connected cavity plate to move, so that the cavity plate drives the connected connecting slide to slide along the side of the ventilation square tube. When the connecting slide slides, it pushes the sealing strip on the side of the ventilation square tube, so that the gap of the sealing strip opens when the connecting slide passes. When the cooling fan on the side cover starts to work, the cooling fan draws the air around the baffle into the connecting slide through the cavity plate, and then transports it to the ventilation square tube through the connecting slide, and then is discharged by the cooling fan, and the air around the baffle is discharged through the cavity plate.

[0013] The present invention provides a battery module busbar laser welding device, which has the following beneficial effects: The present invention is provided with a push-down plate, a vertical support rod, a lifting frame, a thin connecting rod, a buffer plate, a rotating shaft fixing seat, a flip arc arm, a positioning clamp plate, a slide rail, an electric drive frame, a movable end, a screw rod, a laser head, and a side rod connecting plate. The positioning clamp plate is close to the side of the battery pack to correct the placement position, and at the same time, it can play a positioning role on the battery pack on the table, so as to prevent the battery pack from being disturbed by the vibration of the mechanical structure and deviating from the original position, thereby affecting the accuracy of the welding position. In addition, at the same time, the push-down plate drives the buffer plate to squeeze the elastic spring and continue to move downward through the thin connecting rod, so as to control the laser head to continue to move downward close to the busbar to achieve welding while playing the role of positioning the battery pack, thereby improving the welding processing efficiency. The present invention, by providing a flip folding rod, a push-pull rod, a vertical groove folding rod, a displacement block, a downward pressing frame, a convex strip, a tie rod, and an insulating tape, allows the busbar to fit tightly to the upper electrode of the battery pack, thereby preventing the metal busbar from deforming and warping to affect the welding quality of the battery pack, and preventing short circuits or cold welds caused by loose welding. At the same time, the busbar is bound by an elastic insulating tape to better fit the overall shape of the busbar, thereby increasing friction, avoiding embossing marks or scratches on the metal material of the busbar caused by mechanical structure positioning, and providing better protection for the busbar. The present invention, by providing a coupling seat, a roller, a heat-resistant film, a film support rod, a baffle, a ventilation square tube, a heat dissipation fan, a sealing strip, a connecting slide, and a cavity plate, can prevent sparks from being generated on the busbar or the battery pack, which may cause the metal surface of the welding area to be oxidized and increase the internal resistance of the battery pack, and prevent dust or sparks from falling directly on the busbar. At the same time, the cavity plate can be used to discharge the air around the baffle, which can reduce excessive heat concentration during laser welding of the wiring and avoid safety hazards caused by increased battery pack temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention when viewed from above; Figure 3 It is a structural schematic diagram of the overall mechanism position distribution of the present invention; Figure 4 It is a structural schematic diagram of the overall laser welding mechanism of the present invention; Figure 5 It is a structural schematic diagram of the integral busbar positioning mechanism of the present invention; Figure 6 For the present invention as a whole Figure 5 A is a schematic diagram of the enlarged structure of the middle part; Figure 7 It is a structural schematic diagram of the overall protective ventilation mechanism of the present invention; Figure 8 For the present invention as a whole Figure 7 A schematic diagram of the enlarged structure of B; Fig. 9 This is a schematic diagram of the overall cavity plate connection structure of the present invention.

[0015] In the figure: 1, table; 2, side guard plate; 3, bottom plate; 4, battery pack; 5, laser welding mechanism; 51, push plate; 52, vertical support rod; 53, lifting frame; 54, thin connecting rod; 55, buffer plate; 56, rotating shaft fixed seat; 57, flip arc arm; 58, positioning clamping plate; 59, slide rail; 510, electric drive frame; 511, moving end; 512, screw; 513, laser head; 514, side rod connecting plate; 6, busbar positioning mechanism; 61, flip Folding rod; 62, push-pull rod; 63, vertical groove folding rod; 64, displacement block; 65, downward pressure frame; 66, convex strip; 67, tie rod; 68, insulating tape; 7, protective ventilation mechanism; 71, coupling seat; 72, roller shaft; 73, heat-resistant film; 74, film support rod; 75, baffle; 76, ventilation square tube; 77, cooling fan; 78, sealing strip; 79, connecting slide; 710, cavity plate; 8, side cover plate; 9, hydraulic rod; 10, upper support frame. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0017] See also Figure 1-9 , one embodiment of the present invention is: a battery module busbar laser welding device, comprising a platform 1, side guard plates 2 are fixedly connected to both sides of the platform 1, a bottom plate 3 is fixedly connected to the bottom end of the side guard plates 2, a battery pack 4 is arranged above the platform 1, a laser welding mechanism 5 is arranged below the platform 1, a busbar positioning mechanism 6 is arranged above the battery pack 4, a protective ventilation mechanism 7 is arranged above the busbar positioning mechanism 6, a hydraulic rod 9 is fixedly connected to the bottom surface of the platform 1, and side cover plates 8 are arranged on both sides of the protective ventilation mechanism 7; The laser welding mechanism 5 comprises a lower push plate 51, four vertical support rods 52 are fixedly connected to both sides of the top surface of the lower push plate 51, the tops of the four vertical support rods 52 are fixedly connected to a lifting frame 53, four thin connecting rods 54 are fixedly connected to the middle of the top surface of the lower push plate 51, and the tops of the four thin connecting rods 54 are fixedly connected to a buffer plate 55, a side rod connecting plate 514 is arranged between the buffer plate 55 and the lower push plate 51, and the front and rear sides of the side rod connecting plate 514 are slidably connected to a flip arc arm 57, wherein the middle position of two flip arc arms 57 is rotatably connected to a rotating shaft fixed seat 56, and the top of each flip arc arm 57 is hingedly connected to a positioning clamping plate 58, a slide rail 59 is fixedly connected to the top surface of the lifting frame 53, and an electric drive frame 510 is slidably connected to the top of the slide rail 59, and the electric drive frame 5 The inner side of 10 is slidably connected with a moving end 511, the bottom end of the moving end 511 is fixedly connected with a laser head 513, the side of the moving end 511 is rotatably connected with a screw rod 512, the inner side of the side cover plate 8 is fixedly connected with an upper support frame 10, the side rod connecting plate 514 is slidably connected with the thin connecting rod 54, the vertical support rod 52 slides upward from the bottom surface of the table 1 to penetrate the top surface, the outer side of the thin connecting rod 54 is provided with an elastic spring, and the two ends of the elastic spring are respectively fixedly connected with the buffer plate 55 and the lower push plate 51, the screw rod 512 is rotatably connected with the electric drive frame 510, the shaft fixing seat 56 is fixedly connected with the table 1, the flip arc arm 57 is slidably connected with the table 1, and the hydraulic rod 9 is in an extended state to push the connected lower push plate 51 downward, and the movement belt of the lower push plate 51 The vertical support rod 52 connected to the lifting frame 53 moves downward together, so that the electric drive frame 510 on the lifting frame 53 slides and adjusts its position along the slide rail 59 through the built-in motor wheel, and the connected screw 512 is driven by the built-in motor of the electric drive frame 510 to adjust the position of the moving end 511 on the electric drive frame 510. After the moving end 511 drives the laser head 513 to adjust its position, the lifting frame 53 moves downward to approach the integrated busbar placed on the battery pack 4, and the high temperature generated by the laser head 513 allows the busbar to be welded to the electrode contact piece on the battery pack 4. At the same time, the downward movement of the push plate 51 drives the connected thin connecting rod 54 to pull the buffer plate 55, so that the buffer plate 55 is compressed by driving the elastic spring downward and pushes the side rod connecting plate 514 downward The side rod connecting plate 514 moves downward and slides along the connection of the flip arc arm 57, so that the flip arc arms 57 on both sides are subjected to force and rotate around the rotating shaft fixed seat 56. The flipped flip arc arm 57 slides with the table 1 and pushes the connected positioning clamp plate 58 close to the side of the battery pack 4. While correcting the placement position by the positioning clamp plate 58 close to the side of the battery pack 4, it can position the battery pack 4 on the table 1 to prevent the battery pack 4 from being disturbed by the vibration of the mechanical structure and deviating from the original position, affecting the accuracy of the welding position. In addition, when the positioning clamp plate 58 fits the battery pack 4, the hydraulic rod 9 continues to extend to make the lower push plate 51 continue to drive the vertical support rod 52 to move downward, so that the lower push plate 51 drives the buffer plate 55 to squeeze the elastic spring and continue to move downward through the thin connecting rod 54.Thus, the laser head 513 is controlled to continue to move down close to the busbar to achieve welding while positioning the battery pack 4, thereby improving the welding processing efficiency.

[0018] The busbar positioning mechanism 6 includes four flip turning rods 61, each of which is fixedly connected to a push-pull rod 62 at the top, and a vertical groove folding rod 63 is slidably connected to the end of the push-pull rod 62 away from the flip turning rod 61. The top surface of the vertical groove folding rod 63 is fixedly connected to a displacement block 64, and a downward pressing frame 65 is slidably connected inside the displacement block 64. The upper and lower sides of the downward pressing frame 65 are fixedly connected to convex strips 66, and the side of the displacement block 64 is fixedly connected to a tie rod 67. The outer side of the displacement block 64 is provided with an insulated The edge band 68, the flipping folding rod 61 is fixedly connected to the flipping arc arm 57, the convex strip 66 is slidably connected to the pressing frame 65, the pressing frame 65 is slidably connected to the lifting frame 53, and the insulating band 68 is located between the displacement blocks 64 at the front and rear ends. The flipping arc arm 57 is flipped around the rotating shaft fixed seat 56 to drive the connected flipping folding rod 61 to move together. The moving flipping folding rod 61 pushes the vertical groove folding rod 63 through the connected push-pull rod 62, so that the vertical groove folding rod 63 is subjected to force and drives the connected displacement block 64 along the pressing The convex strip 66 on the frame 65 slides, and the position of the insulating tape 68 connected to the tie rod 67 is adjusted by sliding the displacement block 64. While the displacement block 64 moves, the downward pressing frame 65 connected to the lifting frame 53 moves downward close to the busbar on the battery pack 4, and then contacts the busbar on the battery pack 4 through the insulating tape 68 to move the downward pressing frame 65 upward, so that the downward pressing frame 65 partially slides and shrinks into the inside of the lifting frame 53. As the lifting frame 53 continues to move downward, the downward pressing frame 65 drives the insulating tape 68 connected to the displacement block 64 to apply pressure on the busbar through elastic deformation, so that the busbar is tightly attached to the upper electrode of the battery pack 4, avoiding the deformation and warping of the metal busbar and affecting the welding quality of the battery pack 4, and avoiding short circuit or cold welding caused by loose welding. At the same time, using the elastic insulating tape 68 to restrain the busbar can better fit the overall shape of the busbar, thereby increasing friction, avoiding mechanical structure positioning caused by embossing marks or scratches on the metal material of the busbar, and better protecting the busbar.

[0019] The protective ventilation mechanism 7 includes eight coupling seats 71, two coupling seats 71 are rotatably connected with roller shafts 72, the outer sides of the four roller shafts 72 are provided with heat-resistant films 73, the bottom surface of the electric drive frame 510 is fixedly connected with two film support rods 74, a baffle 75 is provided between the two film support rods 74, a side wall of the side cover plate 8 is fixedly connected with a ventilation square tube 76, the front and rear ends of the ventilation square tube 76 are both equipped with cooling fans 77, the side of the ventilation square tube 76 is fixedly connected with a sealing strip 78, the inner side of the sealing strip 78 is slidably connected with a connecting slide 79, the front and rear sides of the electric drive frame 510 are fixedly connected with a sealing strip 78, and the front and rear sides of the electric drive frame 510 are fixedly connected with a sealing strip 78. The upper support frame 10 and the lifting frame 53 are fixedly connected with the cavity plate 710, the front and rear sides of the upper support frame 10 and the lifting frame 53 are fixedly connected with the two coupling seats 71, the film support rod 74 is fixedly connected with the heat-resistant film 73, the blocking bar 75 is fixedly connected with the heat-resistant film 73, and the inner side of the blocking bar 75 is provided with a welding groove, the connecting slide 79 is slidably connected with the ventilation square tube 76, the cavity plate 710 is connected with the connecting slide 79, and the connected film support rod 74 is driven to move together through the movement of the electric drive frame 510, and the movement of the film support rod 74 drives the connected heat-resistant film 73 to move and move around the roller shafts 72, so that the blocking bar 75 The inner welding groove is always below the laser head 513, and the sparks generated by the laser head 513 welding the busbar are blocked around the heat-resistant film 73 connected to the baffle 75 by the baffle 75, so as to prevent the sparks from hitting the busbar or the battery pack 4, causing the metal surface of the welding area to be oxidized, thereby increasing the internal resistance of the battery pack 4, and preventing dust or sparks from falling directly on the busbar. At the same time, the movement of the electric drive frame 510 drives the movement of the connected cavity plate 710, so that the cavity plate 710 drives the connected connecting slide 79 to slide along the side of the ventilation square tube 76, and the connecting slide When the connecting slide 79 slides, it pushes the sealing strip 78 on the side of the ventilation square tube 76, so that the gap of the sealing strip 78 opens when the connecting slide 79 passes. When the cooling fan 77 on the side cover plate 8 starts to work, the cooling fan 77 draws the air around the baffle 75 into the connecting slide 79 through the cavity plate 710, and then transports it to the ventilation square tube 76 through the connecting slide 79, and then is discharged by the cooling fan 77. The air around the baffle 75 is discharged through the cavity plate 710, which can reduce the excessive concentration of heat during laser welding of the wiring, and avoid the safety hazard caused by the increase in temperature of the battery pack 4.

[0020] Working principle: During welding, the battery pack 4 needs to be moved to the designated position on the table 1, and the hydraulic rod 9 is in an extended state to push the connected lower push plate 51 downward. The movement of the lower push plate 51 drives the connected vertical support rod 52 and the lifting frame 53 downward together, so that the electric drive frame 510 on the lifting frame 53 can slide along the slide rail 59 through the built-in motor wheel and adjust the position, and the connected screw 512 is driven by the built-in motor of the electric drive frame 510 to adjust the position of the moving end 511 on the electric drive frame 510. After the moving end 511 drives the laser head 513 to adjust the position, the lifting frame 53 moves downward to the integrated busbar placed on the battery pack 4 with the help of the high temperature generated by the laser head 513 to weld the busbar to the electrode contact on the battery pack 4. At the same time, the downward movement of the lower push plate 51 drives the connected thin connecting rod 54 to pull the buffer plate 55, so that the buffer plate 55 is compressed and pushed by the elastic spring driven downward The side rod connecting plate 514 moves downward, and slides along the connection of the flip arc arm 57 through the downward movement of the side rod connecting plate 514, so that the flip arc arms 57 on both sides are subjected to force and rotate around the rotating shaft fixed seat 56, and the flipped flip arc arms 57 slide with the table 1 and push the connected positioning clamping plate 58 close to the side of the battery pack 4. While correcting the placement position by the positioning clamping plate 58 close to the side of the battery pack 4, it can play a positioning role for the battery pack 4 on the table 1, and prevent the battery pack 4 from being disturbed by the vibration of the mechanical structure and deviating from the original position, affecting the accuracy of the welding position. In addition, when the positioning clamping plate 58 is attached to the battery pack 4, the hydraulic rod 9 continues to extend to make the lower push plate 51 continue to drive the vertical support rod 52 to move downward, and the lower push plate 51 drives the buffer plate 55 to squeeze the elastic spring through the thin connecting rod 54 to continue to move downward, thereby playing a role in positioning the battery pack 4 while controlling the laser head 513 to continue to move down close to the busbar line to achieve welding, thereby improving the welding processing efficiency; The flipping arc arm 57 flips around the rotating shaft fixed seat 56 to drive the connected flipping folding rod 61 to move together. The moving flipping folding rod 61 pushes the vertical groove folding rod 63 through the connected push-pull rod 62, so that the vertical groove folding rod 63 is subjected to force and drives the connected displacement block 64 to slide along the convex strip 66 on the pressing frame 65. The position of the connected insulating tape 68 on the tie rod 67 is adjusted by sliding the displacement block 64. When the displacement block 64 moves, the pressing frame 65 connected to the lifting frame 53 moves downward to the busbar on the battery pack 4, and then contacts the busbar on the battery pack 4 through the insulating tape 68 to move the pressing frame 65 upward, so that the pressing frame 65 5 is partially slid and retracted into the lifting frame 53. As the lifting frame 53 continues to move downward, the pressing frame 65 drives the insulating belt 68 connected to the displacement block 64 to apply pressure on the busbar through elastic deformation, so that the busbar is tightly attached to the upper electrode of the battery pack 4, avoiding the deformation and warping of the metal busbar to affect the welding quality of the battery pack 4, and avoiding short circuit or cold welding caused by loose welding. At the same time, the elastic insulating belt 68 is used to constrain the busbar to better fit the overall shape of the busbar, thereby increasing friction, avoiding embossing marks or scratches on the metal material of the busbar caused by mechanical structure positioning, and better protecting the busbar; When the electric drive frame 510 slides along the slide rail 59 to adjust its position, the movement of the electric drive frame 510 drives the connected film support rod 74 to move together, and the movement of the film support rod 74 drives the connected heat-resistant film 73 to move and move around the rollers 72, so that the welding groove on the inner side of the baffle 75 is always below the laser head 513, and the baffle 75 blocks the sparks generated by the laser head 513 welding the busbar around the heat-resistant film 73 connected to the baffle 75, preventing the sparks from generating sparks on the busbar or the battery pack 4, causing the metal surface of the welding area to be oxidized, thereby increasing the internal resistance of the battery pack 4, and preventing dust or sparks from falling directly on the busbar. At the same time, the movement of the electric drive frame 510 drives the connected cavity plate 710 moves, so that the cavity plate 710 drives the connected connecting slide 79 to slide along the side of the ventilation square tube 76. When the connecting slide 79 slides, it pushes the sealing strip 78 on the side of the ventilation square tube 76, so that the gap of the sealing strip 78 opens when the connecting slide 79 passes. When the cooling fan 77 on the side cover plate 8 starts to work, the cooling fan 77 draws the air around the baffle 75 into the connecting slide 79 through the cavity plate 710, and then transports it to the ventilation square tube 76 through the connecting slide 79, and then is discharged by the cooling fan 77. The air around the baffle 75 is discharged through the cavity plate 710, which can reduce the excessive concentration of heat during laser welding of the wiring, and avoid the safety hazard caused by the increase in temperature of the battery pack 4.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A battery module busbar laser welding device, comprising a platform (1), characterized in that: Side guard plates (2) are fixedly connected to both sides of the platform (1), the bottom ends of the side guard plates (2) are fixedly connected to the bottom plates (3), a battery pack (4) is arranged above the platform (1), a laser welding mechanism (5) is arranged below the platform (1), a busbar positioning mechanism (6) is arranged above the battery pack (4), a protective ventilation mechanism (7) is arranged above the busbar positioning mechanism (6), a hydraulic rod (9) is fixedly connected to the bottom surface of the platform (1), and side cover plates (8) are arranged on both sides of the protective ventilation mechanism (7); The laser welding mechanism (5) comprises a push-down plate (51), four vertical support rods (52) are fixedly connected to both sides of the top surface of the push-down plate (51), the top ends of the four vertical support rods (52) are fixedly connected to a lifting frame (53), four thin connecting rods (54) are fixedly connected to the middle of the top surface of the push-down plate (51), the top ends of the four thin connecting rods (54) are fixedly connected to a buffer plate (55), a side rod connecting plate (514) is arranged between the buffer plate (55) and the push-down plate (51), the front and rear sides of the side rod connecting plate (514) are both slidably connected to a flip arc arm (57), wherein the middle positions of two flip arc arms (57) are rotatably connected to a rotating shaft fixing seat (56), and the top end of each flip arc arm (57) is hingedly connected to a positioning clamp (58).

2. A battery module busbar laser welding device according to claim 1, characterized in that: The top surface of the lifting frame (53) is fixedly connected to a slide rail (59), the upper part of the slide rail (59) is slidably connected to an electric drive frame (510), the inner side of the electric drive frame (510) is slidably connected to a mobile end (511), the bottom end of the mobile end (511) is fixedly connected to a laser head (513), the side of the mobile end (511) is rotatably connected to a screw rod (512), and the inner side of the side cover plate (8) is fixedly connected to an upper support frame (10).

3. A battery module busbar laser welding device according to claim 2, characterized in that: The side rod connecting plate (514) is slidably connected to the thin connecting rod (54); the vertical support rod (52) slides upward from the bottom surface of the table plate (1) to pass through the top surface; an elastic spring is arranged on the outer side of the thin connecting rod (54); and the two ends of the elastic spring are respectively fixedly connected to the buffer plate (55) and the lower push plate (51); the screw rod (512) is rotatably connected to the electric drive frame (510); the rotating shaft fixing seat (56) is fixedly connected to the table plate (1); and the flip arc arm (57) is slidably connected to the table plate (1).

4. A battery module busbar laser welding device according to claim 3, characterized in that: The busbar positioning mechanism (6) comprises four flip-over folding rods (61), the top end of each flip-over folding rod (61) being fixedly connected to a push-pull rod (62), one end of the push-pull rod (62) away from the flip-over folding rod (61) being slidably connected to a vertical groove folding rod (63), the top surface of the vertical groove folding rod (63) being fixedly connected to a displacement block (64), the interior of the displacement block (64) being slidably connected to a downward pressing frame (65), the upper and lower sides of the downward pressing frame (65) being fixedly connected to convex strips (66), the side of the displacement block (64) being fixedly connected to a tie rod (67), and the outer side of the displacement block (64) being provided with an insulating belt (68).

5. A battery module busbar laser welding device according to claim 4, characterized in that: The flipping turning rod (61) is fixedly connected to the flipping arc arm (57), the convex strip (66) is slidably connected to the pressing frame (65), the pressing frame (65) is slidably connected to the lifting frame (53), and the insulating belt (68) is located between the displacement blocks (64) at the front and rear ends.

6. A battery module busbar laser welding device according to claim 5, characterized in that: The protective ventilation mechanism (7) comprises eight shaft coupling seats (71), a roller shaft (72) is rotatably connected between two of the shaft coupling seats (71), a heat-resistant film (73) is arranged on the outer sides of four of the roller shafts (72), two film support rods (74) are fixedly connected to the bottom surface of the electric drive frame (510), a retaining bar (75) is arranged between the two film support rods (74), and a ventilation square tube (76) is fixedly connected to the side wall of the side cover plate (8).

7. A battery module busbar laser welding device according to claim 6, characterized in that: Cooling fans (77) are installed at both the front and rear ends of the ventilation square tube (76); a sealing strip (78) is fixedly connected to the side of the ventilation square tube (76); a connecting slideway (79) is slidably connected to the inner side of the sealing strip (78); and a cavity plate (710) is fixedly connected to both the front and rear sides of the electric drive frame (510).

8. A battery module busbar laser welding device according to claim 7, characterized in that: The front and rear sides of the upper support frame (10) and the lifting frame (53) are fixedly connected to two shaft coupling seats (71), the film support rod (74) is fixedly connected to the heat-resistant film (73), the baffle bar (75) is fixedly connected to the heat-resistant film (73), and a welding groove is provided on the inner side of the baffle bar (75), the connecting slideway (79) is slidably connected to the ventilation square tube (76), and the cavity plate (710) is connected to the connecting slideway (79).

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