Welding device for new energy battery pack
By designing a floating pressure head and laser welding components to work together, the gap problem caused by tolerance during the welding process between the battery cell electrode and the busbar was solved, achieving efficient and stable welding results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-12
- Publication Date
- 2026-04-10
AI Technical Summary
In existing technologies, laser welding of battery cell terminals and busbars suffers from gap problems caused by manufacturing tolerances, resulting in energy loss, insufficient penetration, and incomplete welding, which affects welding effect and efficiency.
Design a welding device for new energy battery packs. It adopts a floating pressure head and laser welding components. The moving components drive the mounting block and the compression spring to achieve floating compression of the busbar, ensuring that the distance between the weld points is equal during the welding process. Deep penetration welding is achieved through the coordinated work of a ring spot laser.
It significantly improves the process stability of welding, reduces spatter, decreases porosity, improves weld formation, and enhances welding effect and efficiency.
Smart Images
Figure CN121820873A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of welding technology and relates to a welding device, particularly a welding device for new energy battery packs. Background Technology
[0002] The welding equipment for new energy battery packs is crucial to the performance and safety of the battery pack. Among them, the most critical is the welding of the cell terminals to the busbar. The welding processes for cell terminals to busbars mainly include laser welding, ultrasonic welding, crimping, riveting, and resistance welding. Among these, laser welding has become the mainstream for connecting cells and busbars due to its high precision and high efficiency.
[0003] Currently, before laser welding, a busbar needs to be installed on the top surface of the battery cell terminal. Due to the micron-level manufacturing tolerances of both the top surface of the battery cell terminal and the busbar itself, there will be a height difference between the top surfaces of the terminals between the battery cells. When the busbar is placed on the terminal, a gap will be created between the two. This gap will cause laser energy to penetrate the gap, resulting in energy loss, insufficient penetration, and incomplete welding. Therefore, a fixture is needed to press the busbar tightly onto the top surface of the battery cell terminal. However, due to the height tolerance of the battery cell terminal, a rigid pressure head will cause some points to be pressed tightly while others are not, resulting in uneven pressure, which in turn affects the welding effect and welding efficiency. Summary of the Invention
[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a welding device for new energy battery packs. The technical problem this invention aims to solve is: how to simultaneously weld battery packs of different shapes by setting up multiple floating pressure heads and laser welding components that can follow the moving components up and down and left and right, thereby ensuring welding efficiency and welding effect.
[0005] The objective of this invention can be achieved through the following technical solutions: A welding device for a new energy battery pack includes a base plate, multiple circular battery packs, and multiple annular spot lasers. The circular battery packs are clamped and fixed to the top of the base plate by a clamping assembly. A busbar, which is limited and fixed by the clamping assembly, is placed at the top of the terminal post of each circular battery pack cell. A moving assembly is provided at the top of each of the multiple annular spot lasers. A limiting rod is fixed at the top of each annular spot laser, and a mounting block slides on the outer cylindrical surface of the limiting rod. The mounting block is assembled and connected to the moving assembly. A second compression spring is fixed at the bottom of the mounting block, and the bottom of the second compression spring is fixed to the top of the annular spot laser. A swing welding head is fixed at the output end of each annular spot laser, and multiple connecting rods are fixed at the bottom of each annular spot laser. A pressure head is fixed at the bottom of each of the multiple connecting rods. The pressure head is located below the swing welding head, and a welding hole is opened inside the pressure head. The pressure head is pressed and fixed to the busbar.
[0006] The working principle of this invention is as follows: When connecting the battery cell terminals and busbars of a new energy electric vehicle battery pack using laser welding, the busbars and the circular battery pack are fixed to the base plate by a clamping assembly. Then, the moving assembly drives the mounting block to move downwards. At this time, the mounting block moves downwards along the limit rod and pushes the second compression spring to contract, thereby pushing the annular laser, the oscillating welding head, and the pressure head downwards. Due to the tolerance between the heights of the multiple battery cell terminals, the pressure head floats and compresses the busbars at each welding point under the elastic force of the second compression spring. At the same time, the annular laser and the oscillating welding head move with the movement of the pressure head, ensuring that the distance between the oscillating welding head and the busbar remains equal, guaranteeing that the welding points are identical. To prevent gaps between the cell terminals and busbars of circular battery packs, which could lead to laser energy penetration, energy loss, insufficient penetration, and incomplete welds, a special beam combining a central and annular spot laser is emitted from a ring-shaped laser and directed into the oscillating welding head. The oscillating welding head then performs oscillating welding. The ring-shaped laser uses two annular spots, one inner and one outer, working in tandem. The outer spot preheats and stabilizes the molten pool, while the inner spot performs deep penetration welding. This significantly improves process stability and reduces spatter. The oscillating welding head, through the micro-high-speed oscillation of the laser beam, better stirs the molten pool, facilitating gas escape, reducing porosity, and improving weld formation, thereby increasing welding effect and efficiency.
[0007] The device includes a protective shell, and a fixing frame is fixedly provided on the inner wall of the bottom end of the protective shell. The bottom plate is slidably engaged inside the fixing frame.
[0008] Using the above structure, multiple circular battery packs fixed on the base plate are pushed along the base plate into the fixed frame and placed in place, thus fixing their approximate positions. This facilitates the subsequent scanning and positioning of the weld points by the swing welding head.
[0009] Multiple fixing plates are fixed at the top of the base plate. A screw is threaded inside the fixing plate, and an arc-shaped plate is rotatably connected to one end of the screw. The side of the arc-shaped plate away from the screw is pressed and fixed to the circular battery pack, and an elastic soft pad is provided on the side of the arc-shaped plate away from the screw.
[0010] Using the above structure, the circular battery pack is placed between the two arc-shaped plates at the corresponding positions. Then, the screw is rotated so that it moves forward along the fixed plate, thereby pushing the two arc-shaped plates at the corresponding positions to squeeze the two ends of the circular battery pack, thus completing the fixation. At the same time, the elastic soft pad can better adapt to the slight size deviation of the product, achieve better clamping effect, and reduce damage to the product.
[0011] Both ends of the arc-shaped plate are fixed with extension plates. There are two first sliding rods inside the extension plates. One end of each first sliding rod is fixed with a limiting plate. Two first compression springs are fixed between the limiting plate and the extension plate.
[0012] With the above structure, when fixing a battery pack with a square outer shell, the screw is rotated and moved forward along the fixing plate, which in turn pushes the two arc-shaped plates at the corresponding positions forward, thereby driving the extension plate forward. This allows the limiting plate to press and fix the battery pack with the square outer shell. With the cooperation of the first compression spring and the first slide rod, flexible fixing is achieved, which facilitates fixing the battery pack with the square outer shell, achieves better clamping effect, and reduces damage to the product.
[0013] The moving component includes a first rotary motor and two cylinders fixedly connected by a fixing frame. The first rotary motor is fixed to the back of the protective shell, and a first lead screw is fixed to the output end of the first rotary motor. A connecting plate is fixed to one end of the fixing frame. The first lead screw is screwed into the inside of one end of the connecting plate, and a round rod slides inside the other end of the connecting plate. The round rod is fixed inside the protective shell, and the other end of the first lead screw rotates on the front of the protective shell.
[0014] With the above structure, the first lead screw is rotated by the operation of the first rotary motor, which in turn drives the connecting plate to slide along the round rod, thereby completing the back-and-forth movement. This facilitates the back-and-forth movement of the cylinder to weld multiple round battery packs.
[0015] Both cylinders have cylinder rods that slide inside them, and mounting plates are fixed to the bottom ends of the two cylinder rods. Multiple mounting slots are opened inside the mounting plates, and the mounting slots are movably engaged with the mounting blocks.
[0016] With the above structure, the cylinder rod moves up and down along the inside of the cylinder through the operation of the cylinder, which in turn moves the mounting plate up and down. This makes it easier to fix the position of multiple circular battery packs, and also makes it easier to disassemble and install the mounting plate and mounting block, and facilitates the replacement, maintenance and adjustment of the laser welding components in the future.
[0017] Two snap-fit grooves are provided at one end of the mounting block. Each of the two snap-fit grooves has a connecting hole on the opposite side. Two snap-fit rods are fixed inside the mounting grooves. The snap-fit rods are slidably snapped into the snap-fit grooves. A positioning plate is fixed at the other end of the snap-fit rods. Two second slide rods slide inside the positioning plate. A snap-fit block is fixed at one end of each of the two second slide rods. Two return springs are fixed between the snap-fit block and the positioning plate. The snap-fit block is slidably snapped into the connecting hole.
[0018] Using the above structure, when replacing, repairing, and adjusting the laser welding components, the moving mounting block is snapped into the mounting groove, which in turn causes the snap-fit groove to snap into and fix itself inside the snap-fit rod. During this process, the return spring connected to the snap-fit block is compressed and contracted inside the snap-fit groove, which in turn causes the snap-fit block to move backward. After this process is completed, when the snap-fit block moves along the snap-fit rod to the position of the connection hole, it snaps into the connection hole under the elastic compression force of the return spring, thus completing the fixed installation. When disassembling, first press the snap-fit block to move it to the connection hole and separate it. At the same time, pull the mounting block to separate the snap-fit groove from the snap-fit rod, thereby separating the mounting block from the mounting groove and completing the disassembly.
[0019] It includes a second rotary motor and multiple storage boxes fixed to one side of the protective shell, and the protective shell has multiple through holes on one side.
[0020] With the above structure, the storage box facilitates the storage of busbars, and the busbars can be placed inside the protective shell through the through holes, thus facilitating the installation of the busbars.
[0021] Each of the fixed plates has a placement groove at its top, and an elastic block is fixed inside the placement grooves away from the through hole. The elastic block is pressed and fixed to the busbar.
[0022] With the above structure, the busbar moves along the through hole into the placement slot and is fixed by the elastic block, thereby completing the limit and ensuring the placement accuracy and stability of the busbar.
[0023] The storage box is equipped with a partition plate inside and a limit hole is opened at the bottom of the storage box. The second rotary motor is fixed to one side of the protective shell, and a second lead screw is fixed at the output end of the second rotary motor. A sliding frame is screwed onto the outer cylindrical surface of the second lead screw. The sliding frame slides inside multiple limit holes. Multiple push plates are fixed at the top of the sliding frame and the push plates are located below the partition plate.
[0024] Using the above structure, the second rotary motor drives the second lead screw to rotate, which in turn drives the sliding frame to move forward along the inside of the limiting hole, thereby pushing the push plate to move forward along the bottom of the storage box. This pushes the busbar located at the bottom of the storage box under the action of gravity to move through the through hole into the placement slot, and is fixed by the elastic block, thus completing the automatic placement of the busbar.
[0025] Compared with existing technologies, the welding device for this new energy battery pack has the following advantages: 1. In this invention, when connecting the battery cell terminals and busbars of a new energy electric vehicle battery pack using laser welding, a clamping assembly fixes the busbar and the circular battery pack to a base plate. Then, a moving assembly moves a mounting block downwards. This mounting block moves downwards along a limit rod, pushing a second compression spring to contract, which in turn pushes the annular laser, the oscillating welding head, and the pressure head downwards. Due to the height tolerances between the multiple battery cell terminals, the pressure head, under the elastic force of the second compression spring, floats and compresses the busbar at each welding point. Simultaneously, the annular laser and the oscillating welding head move with the pressure head, ensuring that the distance between the oscillating welding head and the busbar remains constant, guaranteeing identical welding points and preventing... The gap between the cell terminals and busbars of a circular battery pack causes laser energy to penetrate the gap, resulting in energy loss, insufficient penetration, and incomplete welds. To address this, a special beam combining a central and annular spot laser is emitted from a ring-shaped laser and directed into the oscillating welding head. The oscillating welding head then performs oscillating welding. The ring-shaped laser uses two annular spots, one inner and one outer, working in tandem. The outer spot preheats and stabilizes the molten pool, while the inner spot performs deep penetration welding. This significantly improves process stability and reduces spatter. The oscillating welding head, through the micro-high-speed oscillation of the laser beam, better stirs the molten pool, facilitating gas escape, reducing porosity, and improving weld formation, thereby increasing welding effect and efficiency.
[0026] 2. In this invention, a circular battery pack is placed between two arc-shaped plates at corresponding positions. Then, the screw is rotated so that it moves forward along the fixing plate, thereby pushing the two arc-shaped plates at corresponding positions to squeeze the two ends of the circular battery pack, thus completing the fixation. At the same time, the elastic soft pad can better adapt to the slight size deviation of the product, achieve better clamping effect, and reduce damage to the product. Then, multiple circular battery packs fixed on the base plate are pushed along the base plate into the fixed frame and placed and fixed, completing the approximate fixation of the position, which is convenient for the subsequent swing welding head to scan and position the weld points.
[0027] 3. In this invention, by rotating the screw, the screw moves forward along the fixed plate, thereby pushing the two arc-shaped plates at the corresponding positions forward, which in turn moves the extension plate forward. This causes the limiting plate to compress and fix the battery pack with a square casing. With the cooperation of the first compression spring and the first sliding rod, flexible fixing is achieved, which facilitates fixing the battery pack with a square casing, achieves better clamping effect, reduces damage to the product, and reduces its limitations.
[0028] 4. In this invention, the movable mounting block is snapped into the mounting groove, thereby causing the snap-fit groove to snap into and fix itself inside the snap-fit rod. During this process, the return spring connected to the snap-fit block is compressed and contracted inside the snap-fit groove, thereby causing the snap-fit block to move backward. After this process is completed, when the snap-fit block moves along the snap-fit rod to the position of the connection hole, it snaps into the connection hole under the elastic compression force of the return spring, thus completing the fixed installation. During disassembly, the snap-fit block is first pressed to move it to the connection hole and separate. At the same time, the mounting block is pulled to separate the snap-fit groove from the snap-fit rod, thereby separating the mounting block from the mounting groove and completing the disassembly. This facilitates the replacement, maintenance and adjustment of the laser welding components.
[0029] 5. In this invention, the second rotary motor drives the second lead screw to rotate, which in turn drives the sliding frame to move forward along the inside of the limiting hole, thereby pushing the push plate to move forward along the bottom of the storage box. This pushes the busbar located at the bottom of the storage box under the action of gravity to move through the through hole into the placement slot, and is fixed by the elastic block, thereby completing the automatic placement of the busbar, reducing the workload of the staff, and increasing the placement speed, accuracy and stability of the busbar.
[0030] 6. This invention increases work efficiency and product adaptability by setting up multiple laser welding components that can move up and down and left and right along the moving component to simultaneously weld square or round battery packs of different specifications. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0032] Figure 2 This is a schematic diagram of the overall internal structure of the present invention.
[0033] Figure 3 This is a schematic diagram of the protective shell in this invention.
[0034] Figure 4 This is a diagram showing the positional relationship between the base plate and multiple circular battery packs in this invention.
[0035] Figure 5 This is a diagram showing the positional relationship between the first rotary motor and the cylinder in this invention.
[0036] Figure 6 This is a diagram showing the positional relationship between the ring-shaped laser, the oscillating welding head, and the pressure head in this invention.
[0037] Figure 7 This is a diagram showing the positional relationship between the multiple storage boxes and the second rotary motor in this invention.
[0038] Figure 8 This is a schematic diagram of the storage box in this invention.
[0039] Figure 9 This is a schematic diagram of the structure of the second rotary motor in this invention.
[0040] Figure 10 This is the present invention. Figure 4 Enlarged view of the structure at point A in the middle.
[0041] Figure 11 This is a diagram showing the broken structure of the mounting plate in this invention.
[0042] Figure 12 This is the present invention. Figure 11 Enlarged view of the structure at point B in the middle.
[0043] In the diagram, 101 is the base plate; 102 is the circular battery pack; 103 is the busbar; 104 is the fixing plate; 105 is the screw; 106 is the arc plate; 107 is the extension plate; 108 is the first sliding rod; 109 is the limiting plate; 110 is the first compression spring; 120 is the placement groove; 130 is the elastic block; 201 is the protective shell; 202 is the fixing frame; 203 is the through hole; 301 is the first rotary motor; 302 is the first lead screw; 303 is the cylinder; 304 is the fixing bracket; 305 is the connecting plate; 306 is the round rod; 307 is the cylinder rod; 308 is the mounting plate; 30 9. Mounting slot; 310. Snap-fit rod; 320. Positioning plate; 330. Second slide rod; 340. Return spring; 350. Snap-fit block; 401. Annular spot laser; 402. Swing welding head; 403. Connecting rod; 404. Pressure head; 405. Welding hole; 406. Limiting rod; 407. Mounting block; 408. Snap-fit groove; 409. Connecting hole; 410. Second compression spring; 501. Storage box; 502. Second rotary motor; 503. Limiting hole; 504. Second lead screw; 505. Sliding frame; 506. Push plate; 507. Divider plate. Detailed Implementation
[0044] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0045] like Figures 1-12As shown, the welding device for this new energy battery pack includes a base plate 101, multiple circular battery packs 102, and multiple annular laser beams 401. The circular battery packs 102 are clamped and fixed to the top of the base plate 101 by a clamping assembly. A busbar 103, which is limited and fixed by the clamping assembly, is placed at the top of the cell terminal of the circular battery pack 102. A moving component is provided at the top of the multiple annular laser beams 401. A limiting rod 406 is fixed at the top of the annular laser beams 401, and a mounting block 407 slides on the outer cylindrical surface of the limiting rod 406. The mounting block 407 is assembled with the moving component. The bottom end of the mounting block 407 is fixed with a second compression spring 410, and the bottom end of the second compression spring 410 is fixed to the top end of the ring spot laser 401. The output end of the ring spot laser 401 is fixed with a swing welding head 402, and the bottom end of the ring spot laser 401 is fixed with multiple connecting rods 403. The bottom end of the multiple connecting rods 403 is fixed with a pressure head 404. The pressure head 404 is located below the swing welding head 402, and a welding hole 405 is opened inside the pressure head 404. The pressure head 404 is pressed and fixed with the busbar 103.
[0046] When connecting the battery cell terminals of a new energy electric vehicle battery pack to the busbar 103 using laser welding, the busbar 103 and the circular battery pack 102 are fixed to the base plate 101 by a clamping assembly. Then, the moving assembly drives the mounting block 407 to move downward. At this time, the mounting block 407 moves downward along the limiting rod 406 and pushes the second compression spring 410 to contract, thereby pushing the annular laser 401, the oscillating welding head 402, and the pressure head 404 to move downward. Since there is a tolerance between the heights of the multiple battery cell terminals, the pressure head 404 floats and compresses the busbar 103 at each welding point under the elastic force of the second compression spring 410. At the same time, the annular laser 401 and the oscillating welding head 402 move with the movement of the pressure head 404, so that the distance between the oscillating welding head 402 and the busbar 103 is increased. To ensure that the distance between the laser beam and the weld joints remains constant, gaps between the cell terminals and busbars 103 of the circular battery pack 102 are prevented, which could lead to laser energy penetration through the gaps, resulting in energy loss, insufficient penetration, and incomplete welds. Finally, a special beam combining the central and annular beams of the ring-shaped laser 401 is emitted into the oscillating welding head 402. Oscillating welding is then performed through the oscillating welding head 402. The ring-shaped laser 401 uses two annular beams, one inner and one outer, working in tandem. The outer ring beam preheats and stabilizes the molten pool, while the inner ring beam performs deep penetration welding. This significantly improves process stability and reduces spatter. The oscillating welding head 402, through its micro-high-speed oscillation of the laser beam, better stirs the molten pool, facilitating gas escape, reducing porosity, and improving weld formation, thereby increasing welding effect and efficiency.
[0047] It includes a protective shell 201, and a fixing frame 202 is fixedly provided on the inner wall of the bottom end of the protective shell 201. The bottom plate 101 is slidably snapped into the inside of the fixing frame 202.
[0048] In this embodiment, multiple circular battery packs 102 fixed on the base plate 101 are pushed along the base plate 101 into the fixed frame 202 and placed and fixed, thus completing the fixation of the approximate position, which facilitates the subsequent oscillating welding head 402 to scan and position the welding points.
[0049] Multiple fixing plates 104 are fixedly provided at the top of the base plate 101. The fixing plate 104 is internally threaded with a screw 105, and one end of the screw 105 is rotatably connected to an arc plate 106. The side of the arc plate 106 away from the screw 105 is pressed and fixed to the circular battery pack 102, and the side of the arc plate 106 away from the screw 105 is provided with an elastic soft pad.
[0050] In this embodiment, the circular battery pack 102 is placed between two arc-shaped plates 106 at corresponding positions. Then, the screw 105 is rotated so that the screw 105 moves forward along the fixing plate 104, thereby pushing the two arc-shaped plates 106 at corresponding positions to squeeze the two ends of the circular battery pack 102 to complete the fixation. At the same time, the elastic soft pad can better adapt to the small size deviation of the product, achieve a better clamping effect, and reduce damage to the product.
[0051] Both ends of the arc plate 106 are fixed with extension plates 107. There are two first slide rods 108 sliding inside the extension plate 107. One end of the two first slide rods 108 is fixed with a limiting plate 109. Two first compression springs 110 are fixed between the limiting plate 109 and the extension plate 107.
[0052] In this embodiment, when fixing a battery pack with a square outer shell, the screw 105 is rotated to move forward along the fixing plate 104, thereby pushing the two arc-shaped plates 106 at the corresponding positions to move forward, which in turn drives the extension plate 107 to move forward, so that the limiting plate 109 squeezes and fixes the battery pack with the square outer shell. Under the cooperation of the first compression spring 110 and the first slide bar 108, flexible fixing is completed, which facilitates fixing the battery pack with the square outer shell, achieves a better clamping effect, and reduces damage to the product.
[0053] The moving component includes a first rotary motor 301 and two cylinders 303 fixedly connected by a fixing frame 304. The first rotary motor 301 is fixed to the back of the protective shell 201, and a first lead screw 302 is fixedly provided at the output end of the first rotary motor 301. A connecting plate 305 is fixedly provided at one end of the fixing frame 304. The first lead screw 302 is screwed into the inside of one end of the connecting plate 305, and a round rod 306 slides inside the other end of the connecting plate 305. The round rod 306 is fixed inside the protective shell 201, and the other end of the first lead screw 302 rotates on the front of the protective shell 201.
[0054] In this embodiment, the first rotary motor 301 operates to rotate the first lead screw 302, which in turn drives the connecting plate 305 to slide along the round rod 306, thereby completing the forward and backward movement. This facilitates the forward and backward movement of the cylinder 303 to weld the multiple circular battery packs 102.
[0055] Both cylinders 303 have cylinder rods 307 sliding inside them. The bottom ends of the two cylinder rods 307 are fixed with mounting plates 308. Multiple mounting slots 309 are opened inside the mounting plates 308, and the mounting slots 309 are movably engaged with the mounting blocks 407.
[0056] In this embodiment, the cylinder 303 drives the cylinder rod 307 to move up and down along the inside of the cylinder 303, thereby driving the mounting plate 308 to move up and down. This facilitates the fixing of the positions of the multiple circular battery packs 102, and also facilitates the disassembly and installation of the mounting plate 308 and the mounting block 407, making it easier to replace, repair and adjust the laser welding components later.
[0057] Two snap-fit grooves 408 are provided at one end of the mounting block 407. Each of the two snap-fit grooves 408 has a connecting hole 409 on the opposite side. Two snap-fit rods 310 are fixed inside the mounting groove 309. The snap-fit rods 310 are slidably snapped into the snap-fit grooves 408. A positioning plate 320 is fixed at the other end of the snap-fit rods 310. Two second slide rods 330 slide inside the positioning plate 320. A snap-fit block 350 is fixed at one end of each of the two second slide rods 330. Two return springs 340 are fixed between the snap-fit block 350 and the positioning plate 320. The snap-fit block 350 is slidably snapped into the connecting hole 409.
[0058] In this embodiment, when replacing, repairing, and adjusting the laser welding assembly, the movable mounting block 407 is snapped into the mounting groove 309, thereby causing the snap-fit groove 408 to snap and fix into the snap-fit rod 310. During this process, the return spring 340 connected to the snap-fit block 350 is compressed and contracted inside the snap-fit groove 408, thereby causing the snap-fit block 350 to move backward. After this process is completed, when the snap-fit block 350 moves along the snap-fit rod 310 to the position of the connection hole 409, it snaps into the connection hole 409 under the elastic compression force of the return spring 340, thereby completing the fixed installation. During disassembly, the snap-fit block 350 is first pressed, causing the snap-fit block 350 to move to the connection hole 409 and separate. At the same time, the mounting block 407 is pulled to separate the snap-fit groove 408 from the snap-fit rod 310, thereby separating the mounting block 407 from the mounting groove 309 and completing the disassembly.
[0059] It includes a second rotary motor 502 and multiple storage boxes 501 fixed to one side of the protective shell 201. Multiple through holes 203 are provided on one side of the protective shell 201.
[0060] In this embodiment, the storage box 501 facilitates the storage of the busbar 103. The busbar 103 can enter the protective shell 201 through the through hole 203 to complete the placement, thereby facilitating the installation of the busbar 103.
[0061] Each of the multiple fixed plates 104 has a placement groove 120 at its top, and each of the multiple placement grooves 120 away from the through hole 203 has an elastic block 130 fixed inside, and the elastic block 130 is pressed and fixed with the busbar 103.
[0062] In this embodiment, the busbar 103 moves along the through hole 203 into the placement groove 120 and is fixed by the elastic block 130, thereby completing the limiting and ensuring the placement accuracy and stability of the busbar 103.
[0063] A partition plate 507 is fixed inside the storage box 501, and a limiting hole 503 is opened at the bottom of the storage box 501. The second rotary motor 502 is fixed to one side of the protective shell 201, and a second lead screw 504 is fixed at the output end of the second rotary motor 502. A sliding frame 505 is screwed onto the outer cylindrical surface of the second lead screw 504. The sliding frame 505 slides inside multiple limiting holes 503. Multiple push plates 506 are fixed at the top of the sliding frame 505. The push plates 506 are located below the partition plate 507.
[0064] In this embodiment, the second rotary motor 502 drives the second lead screw 504 to rotate. The rotation of the second lead screw 504 drives the sliding frame 505 to move forward along the inside of the limiting hole 503, which in turn pushes the push plate 506 to move forward along the bottom of the storage box 501. This pushes the busbar 103 located at the bottom of the storage box 501 under the action of gravity to move through the through hole 203 into the placement slot 120, and is fixed by the elastic block 130, thereby completing the automatic placement of the busbar 103.
[0065] Working principle of the invention: First, the circular battery pack 102 is placed between the two arc-shaped plates 106 at the corresponding positions. Then, the screw 105 is rotated so that the screw 105 moves forward along the fixing plate 104, thereby pushing the two arc-shaped plates 106 at the corresponding positions to press the two ends of the circular battery pack 102 to complete the fixation. When fixing the square battery pack, the screw 105 is rotated so that the screw 105 moves forward along the fixing plate 104, thereby pushing the two arc-shaped plates 106 at the corresponding positions to move forward, thereby driving the extension plate 107 to move forward, so that the limiting plate 109 presses and fixes the battery pack of the square shell, and completes the flexible fixation through the cooperation of the first compression spring 110 and the first slide bar 108. After fixing the corresponding battery pack, multiple circular or battery packs fixed on the base plate 101 are pushed along the base plate 101 into the fixing frame 202 for placement and fixation, thus completing the approximate position fixation. Then, the second rotary motor 502 drives the second lead screw 504 to rotate. The rotation of the second lead screw 504 drives the sliding frame 505 to move forward along the limiting hole 503, thereby pushing the push plate 506 to move forward along the bottom of the storage box 501. This pushes the busbar 103 located at the bottom of the storage box 501 under the action of gravity to move through the through hole 203 into the placement slot 120 and is fixed by the elastic block 130, thus completing the automatic placement of the busbar 103. Then, the camera built into the swing welding head 402 scans and positions the welding point, controls the first rotary motor 301 to work, causing the first lead screw 302 to rotate, thereby driving the connecting plate 305 to slide along the round rod 306, thus completing the back-and-forth movement, and thus driving the laser welding assembly to complete the fine adjustment. Then, the cylinder 303 operates, driving the cylinder rod 307 to move up and down along the inside of the cylinder 303, which in turn drives the mounting plate 308 to move up and down, and then drives the mounting block 407 to move down. At this time, the mounting block 407 moves down along the limit rod 406 and pushes the second compression spring 410 to contract, which in turn pushes the ring spot laser 401, the swing welding head 402 and the pressure head 404 to move down. Since there is a tolerance between the heights of multiple battery cell poles, the pressure head 404 floats and squeezes the busbar 103 at each welding point under the elastic force of the second compression spring 410. At the same time, it drives the ring spot laser 401 and the swing welding head 402 to move with the movement of the pressure head 404, so that the distance between the swing welding head 402 and the busbar 103 is always equal, thus completing the welding preparation. Finally, the ring-shaped laser 401 emits a special beam that combines the center and the ring-shaped spot, which is then directed into the oscillating welding head 402. Oscillating welding is then performed through the oscillating welding head 402. After welding a group of circular or battery packs, the laser welding assembly is moved by the moving component to repeat the above actions to fine-tune and weld the second group of circular or battery packs, thereby completing the welding of all battery packs.
[0066] In summary, by setting up multiple floating pressure heads 404 that can move up and down and left and right with the moving components and laser welding components, battery packs of different shapes can be welded simultaneously, thereby ensuring welding efficiency and welding effect.
[0067] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.
Claims
1. A welding device for new energy battery pack, comprising a bottom plate (101), a plurality of circular battery packs (102) and a plurality of annular spot lasers (401), characterized in that, The circular battery pack (102) is clamped and fixed on the top end of the bottom plate (101) through the clamping assembly, and the top end of the cell pole of the circular battery pack (102) is provided with a busbar (103) limited and fixed through the clamping assembly, a plurality of annular light spot lasers (401) are provided with a moving assembly on the top end, the top end of the annular light spot laser (401) is fixedly provided with a limiting rod (406), and the outer column surface of the limiting rod (406) is slidably provided with a mounting block (407), the mounting block (407) is assembled and connected with the moving assembly, the bottom end of the mounting block (407) is fixedly provided with a second extrusion spring (410), and the bottom end of the second extrusion spring (410) is fixed on the top end of the annular light spot laser (401), the output end of the annular light spot laser (401) is fixedly provided with a swing welding head (402), and the bottom end of the annular light spot laser (401) is fixedly provided with a plurality of connecting rods (403), the bottom end of the plurality of connecting rods (403) is fixedly provided with a pressure head (404), the pressure head (404) is located below the swing welding head (402), and the pressure head (404) is provided with a welding hole (405) in the inside, and the pressure head (404) is extruded and fixed with the busbar (103).
2. The welding device of a new energy battery pack according to claim 1, characterized in that, The protection shell (201) is provided with a fixed frame (202) on the inner wall of the bottom end, and the bottom plate (101) is slidably connected in the fixed frame (202).
3. The welding device of a new energy battery pack according to claim 2, characterized in that, The top end of the bottom plate (101) is fixedly provided with a plurality of fixed plates (104), the inside of the fixed plate (104) is threadedly connected with a screw rod (105), one end of the screw rod (105) is rotatably connected with an arc plate (106), one side of the arc plate (106) away from the screw rod (105) is extruded and fixed with the circular battery pack (102), and the other side of the arc plate (106) away from the screw rod (105) is provided with an elastic soft pad.
4. The welding device of a new energy battery pack according to claim 3, characterized in that, The two ends of the arc plate (106) are fixedly provided with an extension plate (107), the inside of the extension plate (107) is slidably provided with two first sliding rods (108), one end of the two first sliding rods (108) is fixedly provided with a limiting plate (109), and two first extrusion springs (110) are fixedly arranged between the limiting plate (109) and the extension plate (107).
5. The welding device of a new energy battery pack according to claim 2, characterized in that, The moving assembly comprises a first rotary motor (301) and two air cylinders (303) fixedly connected through a fixed frame (304), the first rotary motor (301) is fixed on the back of the protection shell (201), and the output end of the first rotary motor (301) is fixedly provided with a first screw rod (302), one end of the fixed frame (304) is fixedly provided with a connecting plate (305), the first screw rod (302) is screwed into the inside of one end of the connecting plate (305), and the other end of the connecting plate (305) is slidably provided with a circular rod (306) in the inside, the circular rod (306) is fixed in the inside of the protection shell (201), and the other end of the first screw rod (302) is rotatable on the front of the protection shell (201).
6. The welding device of a new energy battery pack according to claim 5, characterized in that, Two described cylinder (303) inside all have cylinder rod (307) that slides, two described cylinder rod (307) bottom is equipped with mounting plate (308), the mounting plate (308) inside is equipped with multiple installation slot (309), the installation slot (309) with mounting block (407) swing joint.
7. The apparatus according to claim 6, wherein The mounting block (407) one end is equipped with two clamping grooves (408), two described clamping grooves (408) are equipped with connecting hole (409) on the side away from each other, the installation slot (309) inside is equipped with two clamping rods (310), the clamping rod (310) with clamping groove (408) sliding joint, the other end of the clamping rod (310) is equipped with positioning plate (320), the positioning plate (320) inside sliding has two second slide rods (330), two described second slide rods (330) one end is equipped with clamping block (350), the clamping block (350) with positioning plate (320) between is equipped with two reset springs (340), the clamping block (350) sliding joint is in the connecting hole (409) inside.
8. The welding device of a new energy battery pack according to claim 2, characterized in that, Including second rotary motor (502) and multiple fixed storage box (501) on one side of protective shell (201), the protective shell (201) one side is equipped with multiple through holes (203).
9. The apparatus according to claim 8, wherein Multiple described fixed plate (104) top all are equipped with placement slot (120), and multiple placement slots (120) inside away from the through hole (203) are all equipped with elastic block (130), the elastic block (130) and busbar (103) extrusion fixed.
10. The apparatus according to claim 8, wherein The storage box (501) inside is equipped with a partition plate (507), and the bottom of the storage box (501) is equipped with a limiting hole (503), the second rotary motor (502) is fixed on one side of the protective shell (201), and the output end of the second rotary motor (502) is equipped with a second lead screw (504), and the outer cylindrical surface of the second lead screw (504) is screwed with a sliding frame (505), the sliding frame (505) slides in multiple limiting holes (503), the top of the sliding frame (505) is equipped with multiple push plates (506), the push plate (506) is below the partition plate (507).