New energy vehicle battery cell tab automatic welding detection equipment

Abstract

The present invention relates to an automatic welding inspection device for battery cell tabs of new energy vehicles, which is characterized in that it includes a frame and a laser welding device, a plurality of tray lifting mechanisms and a plurality of auxiliary loading and unloading mechanisms are arranged in the middle of the frame, the tray lifting mechanism includes a first cylinder, a lifting bracket and an auxiliary roller, the auxiliary loading and unloading mechanism includes a second cylinder, a floating plate and an electric roller, a visual inspection mechanism and an air extraction and ranging component are arranged on both sides of the frame, the visual inspection mechanism includes a first linear module, a slide and a CCD camera, and an omnidirectional clamping mechanism is arranged above each tray lifting mechanism on the frame. The beneficial effects of the present invention are: it can automatically perform bidirectional laser welding on automobile battery cell modules, has high processing efficiency, is convenient for loading and unloading, can detect the position of the welding point before welding, can absorb the waste gas and waste slag generated during welding, can detect the welding quality of the welding point after welding, and ensure the processing quality of the product.

Description

Technical Field

[0001] The present invention relates to the field of battery cell production and processing equipment, and in particular to automatic welding equipment for battery cell tabs of new energy vehicles. Background Art

[0002] New energy vehicles are a type of transportation vehicle powered by electricity. Automotive battery cells are components used to store electricity. Tabs are a raw material for lithium-ion polymer battery products. They are metal conductors that lead the positive and negative electrodes from the battery cells. In layman's terms, tabs are the ears of the positive and negative poles of the battery. They are the contact points during charging and discharging. Automotive battery modules are usually assembled from multiple battery cells. During the processing, the tabs on the battery cells on both sides of the automotive battery module need to be welded to the reflow sheet (the two parallel sides of the automotive battery cell need to be welded with tabs).

[0003] For the welding processing of the pole lug, the existing publication number CN112453699B is a full-pole lug collecting plate welding equipment, which includes a welding fixture, multiple conveying mechanisms, a pressing mechanism and a welding mechanism; the welding fixture includes a material carrier and a positioning seat, the positioning seat is installed on the conveying mechanism, the material carrier includes a battery cell carrier and a current collecting plate positioning block, the current collecting plate positioning block is installed on the top of the battery cell carrier, the battery cell carrier is provided with a battery cell mounting portion, the current collecting plate positioning block is provided with a positioning groove, the battery cell mounting portion is used to position the battery cell to be welded, the positioning groove is used to position the cover plate of the pole lug to be welded, the battery cell mounting portion is located on one side of the positioning groove so that the current collecting plate of the pole lug to be welded is aligned with the welding end surface of the battery cell to be welded; the current collecting plate positioning block and the positioning seat are positioned and connected by a first positioning pin; the conveying mechanism is used to convey the welding fixture to the pressing mechanism, and the pressing mechanism is used to press the current collecting plate against the welding end surface for the welding mechanism to perform welding.

[0004] The aforementioned full-tab collector tray welding equipment manually loads and positions the battery cells and tabs to be welded onto a welding fixture. Multiple conveyor mechanisms then continuously transport different welding fixtures to welding stations, creating a semi-automated full-tab collector tray welding system. Compared to manual welding of collector trays, this significantly improves welding efficiency and can meet certain production needs.

[0005] However, under the premise of ensuring processing quality, the existing full-tab collector plate welding equipment can only expose a single welding side of the automobile battery cell after clamping the automobile battery cell, realizing one-way welding of the automobile battery cell, and is difficult to adapt to the two-way tab welding of the battery cell module. For automobile battery cells with double-side welding requirements, the tab is clamped and welded on one side before being welded on the other side. During clamping and transportation, the tab may be deformed or offset, resulting in misalignment of the weld point. At this time, further welding will produce defective products, and the recycling cost is high. In addition, the automobile battery module assembly is heavy after being clamped on the carrier, and it is inconvenient to load and unload. At the same time, the waste gas and waste residue generated during welding are not recycled. Summary of the Invention

[0006] The purpose of the present invention is to provide an automatic welding equipment for the tabs of new energy vehicle batteries, which can automatically perform bidirectional laser welding on the two sides of the vehicle battery module. It not only has high processing efficiency and convenient loading and unloading, but also can detect the position of the welding point before welding, remove the waste gas and waste slag generated during the welding process, and detect the welding quality of the welding point after welding to ensure the product processing quality.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: an automatic welding detection equipment for battery cell tabs of new energy vehicles, characterized in that: it includes a frame and a laser welding device, a guide rail, multiple tray lifting mechanisms and multiple auxiliary loading and unloading mechanisms are arranged in the middle of the frame, the tray lifting mechanism includes a first cylinder, a lifting bracket and an auxiliary roller, the auxiliary loading and unloading mechanism includes a second cylinder, a floating plate and an electric roller, and visual inspection mechanisms and vacuum ranging components are arranged on both sides of the frame, the visual inspection mechanism includes a first linear module, a slide and a CCD camera, the vacuum ranging component includes a second linear module, a seat plate, a third linear module, a distance sensor, a lifting platform, a third cylinder, a pressure block and an exhaust hood, and an omnidirectional clamping mechanism is arranged above each tray lifting mechanism on the frame, and the omnidirectional clamping mechanism includes a mounting seat, a fourth cylinder, a fifth cylinder, a first clamping bracket, a second clamping bracket and a connecting screw.

[0008] Furthermore, the first cylinder is fixedly connected to the frame, the lifting bracket is slidably connected to the frame, the auxiliary roller is rotatably connected to the lifting bracket, and blocking cylinders are fixedly connected to both sides of each tray lifting mechanism on the frame.

[0009] Furthermore, the first linear module is fixedly connected to the frame, the base plate is slidably connected to the frame, the slide is fixedly connected to the moving platform of the first linear module, and the CCD camera is fixedly connected to the slide.

[0010] Furthermore, the second linear module is fixedly connected to the frame, the base plate is fixedly connected to the movable platform of the second linear module, the third linear module and the distance sensor are both fixedly connected to the base plate, the lifting platform is fixedly connected to the movable platform of the third linear module, the pressure block is slidably connected to the lifting platform, the third cylinder is fixedly connected to the lifting platform, the piston rod of the third cylinder is fixedly connected to the pressure block, and the exhaust hood is fixedly connected to the side of the pressure block close to the third cylinder.

[0011] Furthermore, the mounting base is fixedly connected to the frame, and there are two of the first clamping bracket and the second clamping bracket. The two first clamping brackets are arranged in parallel on both sides of the mounting base, and the two second clamping brackets are arranged in parallel on the other two sides of the mounting base. The shell of the fourth cylinder is fixedly connected to the first clamping bracket, the piston rod of the fourth cylinder is fixedly connected to the mounting base, the shell of the fifth cylinder is fixedly connected to a second clamping bracket, and the piston rod of the fifth cylinder is fixedly connected to another second clamping bracket through a connecting screw. The first clamping bracket and the second clamping bracket are both slidably connected to the mounting base.

[0012] Furthermore, the laser welding device includes a driving assembly and a laser welding head, and the laser welding head is fixedly connected to the output end of the driving assembly.

[0013] Furthermore, a mouth-shaped groove is provided on the first clamping bracket, and a clearance groove is provided on the pressing block and the exhaust hood. The clearance groove and the mouth-shaped groove are both arranged corresponding to the laser welding device.

[0014] The beneficial effects of the present invention are: it can automatically perform bidirectional laser welding on the two sides of the automotive battery module, with high processing efficiency and convenient loading and unloading of tools. At the same time, it can detect the position of the welding point before welding, and can absorb the waste gas and waste slag generated during the welding process during welding. After welding, the welding quality of the welding point can be detected to ensure the processing quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an axonometric schematic diagram of Example 1 of the automatic welding equipment for battery cell tabs of new energy vehicles of the present invention.

[0016] Figure 2 This is an axonometric schematic diagram of embodiment 2 of the automatic welding equipment for battery cell tabs of new energy vehicles of the present invention.

[0017] Figure 3 This is a schematic diagram of the guide rail of the automatic welding equipment for the battery cell tabs of new energy vehicles of the present invention.

[0018] Figure 4 This is a schematic diagram of the tray lifting mechanism of the automatic welding equipment for battery cell tabs of new energy vehicles of the present invention.

[0019] Figure 5 This is a schematic diagram of the auxiliary loading and unloading mechanism of the automatic welding equipment for battery cell tabs of new energy vehicles of the present invention.

[0020] Figure 6 This is a schematic diagram from the first perspective of the visual inspection mechanism of the automatic welding equipment for battery cell tabs of new energy vehicles of the present invention.

[0021] Figure 7 This is a schematic diagram from the second perspective of the visual inspection mechanism of the automatic welding equipment for battery cell tabs of new energy vehicles of the present invention.

[0022] Figure 8 This is a first-perspective schematic diagram of the omnidirectional clamping mechanism of the automatic welding equipment for new energy vehicle battery cell tabs of the present invention.

[0023] Figure 9 This is a schematic diagram from the second perspective of the omnidirectional clamping mechanism of the automatic welding equipment for battery cell tabs of new energy vehicles of the present invention.

[0024] Figure 10 This is a schematic diagram of the visual inspection mechanism of the automatic welding equipment for battery cell tabs of new energy vehicles of the present invention.

[0025] Figure: 1, frame; 2, laser welding device; 3, tray lifting mechanism; 301, first cylinder; 302, lifting bracket; 303, auxiliary roller; 4, auxiliary loading and unloading mechanism; 401, second cylinder; 402, floating plate; 403, electric roller; 5, visual inspection mechanism; 501, first linear module; 502, slide; 503, CCD camera; 6, air extraction distance measurement component; 601, second linear module; 60 2. Seat plate; 603. Third linear module; 604. Distance sensor; 605. Lifting platform; 606. Third cylinder; 607. Pressure block; 608. Exhaust hood; 7. Omnidirectional clamping mechanism; 701. Mounting seat; 702. Fourth cylinder; 703. Fifth cylinder; 704. First clamping bracket; 7041. Mouth-shaped groove; 705. Second clamping bracket; 706. Connecting screw; 8. Blocking cylinder; 9. Give way groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] refer to Figures 1-10The automatic welding detection equipment for the tabs of battery cells of new energy vehicles shown in the figure is characterized in that it includes a frame 1 and a laser welding device 2, and a guide rail, multiple tray lifting mechanisms 3 and multiple auxiliary loading and unloading mechanisms 4 are arranged in the middle of the frame 1. The guide rail can guide the loading of the carrier loaded with the battery cell module, and the tray lifting mechanism 3 includes a first cylinder 301, a lifting bracket 302 and an auxiliary roller 303. The laser welding device 2 can weld each tab on both sides of the battery cell module, and the auxiliary loading and unloading mechanism 4 includes a second cylinder 401, a floating plate 402 and an electric roller 403. The auxiliary loading and unloading mechanism 4 is used to assist the carrier in unloading. Visual inspection mechanisms 5 and vacuum ranging components 6 are arranged on both sides of the frame 1. The visual inspection mechanism 5 is used to detect the tabs and the return The solder joint positions of the wafers and whether there are any welding defects after welding, the visual inspection mechanism 5 includes a first linear module 501, a slide 502 and a CCD camera 503, the vacuum distance measuring component 6 includes a second linear module 601, a seat plate 602, a third linear module 603, a distance sensor 604, a lifting platform 605, a third cylinder 606, a pressure block 607 and an exhaust hood 608, and the frame 1 is provided with an omnidirectional clamping mechanism 7 above each tray lifting mechanism 3, the omnidirectional clamping mechanism 7 is used to clamp the carrier and battery module loaded with automotive battery cells, the omnidirectional clamping mechanism 7 includes a mounting seat 701, a fourth cylinder 702, a fifth cylinder 703, a first clamping bracket 704, a second clamping bracket 705 and a connecting screw 706.

[0028] The first cylinder 301 is fixedly connected to the frame 1, and the lifting bracket 302 is slidably connected to the frame 1. The frame 1 can guide the sliding of the lifting bracket 302 to prevent the lifting bracket 302 from offsetting during the sliding process. The auxiliary roller 303 is rotatably connected to the lifting bracket 302. The frame 1 is fixedly connected to both sides of each tray lifting mechanism 3 with a blocking cylinder 8, which is used to limit the position of the carrier.

[0029] The first linear module 501 is fixedly connected to the frame 1, and the seat plate 602 is slidably connected to the frame 1. The frame 1 can guide the sliding of the seat plate 602 to prevent the seat plate 602 from offsetting during the sliding process. The slide 502 is fixedly connected to the movable platform of the first linear module 501, and the CCD camera 503 is fixedly connected to the slide 502.

[0030] The second linear module 601 is fixedly connected to the frame 1, the base plate 602 is fixedly connected to the movable platform of the second linear module 601, the third linear module 603 and the distance sensor 604 are both fixedly connected to the base plate 602, the lifting platform 605 is fixedly connected to the movable platform of the third linear module 603, the pressure block 607 is slidably connected to the lifting platform 605, and the lifting platform 605 can guide the sliding of the pressure block 607 to prevent the pressure block 607 from offsetting during the sliding process, the third cylinder 606 is fixedly connected to the lifting platform 605, the piston rod of the third cylinder 606 is fixedly connected to the pressure block 607, the exhaust hood 608 is fixedly connected to the side of the pressure block 607 close to the third cylinder 606, and the air inlet on the exhaust hood 608 is connected to the external negative pressure fan through the air pipe to remove the exhaust gas generated during the welding process.

[0031] The mounting base 701 is fixedly connected to the frame 1, and the first clamping bracket 704 and the second clamping bracket 705 each have two, the two first clamping brackets 704 are arranged in parallel on both sides of the mounting base 701, and the two second clamping brackets 705 are arranged in parallel on the other two sides of the mounting base 701, the shell of the fourth cylinder 702 is fixedly connected to the first clamping bracket 704, the piston rod of the fourth cylinder 702 is fixedly connected to the mounting base 701, the shell of the fifth cylinder 703 is fixedly connected to a second clamping bracket 705, and the piston rod of the fifth cylinder 703 is fixedly connected to another second clamping bracket 705 through a connecting screw 706, the first clamping bracket 704 and the second clamping bracket 705 are both slidably connected to the mounting base 701, and the mounting base 701 can guide the sliding of the first clamping bracket 704 and the second clamping bracket 705 to prevent the first clamping bracket 704 and the second clamping bracket 705 from offsetting during the sliding process.

[0032] The laser welding device 2 includes a driving component and a laser welding head, and the laser welding head is fixedly connected to the output end of the driving component.

[0033] A mouth-shaped groove 7041 is formed on the first clamping bracket 704 , and a clearance groove 9 is formed on both the pressing block 607 and the exhaust hood 608 . The clearance groove 9 and the mouth-shaped groove 7041 are both provided corresponding to the laser welding device 2 .

[0034] Embodiment 1: The driving component of the laser welding device 2 is a robot, and the robot is fixedly connected to the top of the frame 1, and the laser welding head is fixedly connected to the output end of the robot. When performing welding processing, the carrier loaded with the battery module is lifted to the omnidirectional clamping mechanism 7 to complete clamping and detection, and then the laser welding head is driven by the robot to move to the side of one of the first clamping brackets 704. After the third cylinder 606 drives the pressure head 607 to pass through the mouth-shaped groove 7041 of the first clamping bracket 704 to press the tab on the reflow sheet of the battery cell, the laser welding head emits laser through the exhaust hood 608 and the yield groove 9 on the pressure head 607 to weld the tab. After completing the welding processing of all the tabs at this first clamping bracket 704, the robot drives the laser welding head to another first clamping bracket 704 for welding processing.

[0035] Embodiment 2: The driving component of the laser welding device 2 is a two-axis linear module, and a laser welding device is provided on each side of the frame 1. The laser welding head is fixedly connected to the movable table of the two-axis linear module. When performing welding processing, the carrier loaded with the battery module is lifted to the omnidirectional clamping mechanism 7 to complete clamping and detection. The two-axis linear modules on both sides of the frame 1 drive the laser welding head to move to the sides of the two first clamping brackets 704 respectively. After the third cylinder 606 drives the pressure head 607 to pass through the mouth-shaped groove 7041 of the first clamping bracket 704 to press the tab on the reflow sheet of the battery cell, the laser welding head emits laser through the exhaust hood 608 and the yield groove 9 on the pressure head 607 to weld the tab. At this time, the tab welding processing can be performed on both sides of each battery cell module at the same time.

[0036] The working principle of the present invention is as follows: when the present invention is in use, the carrier equipped with the battery cell module is pushed into each tray lifting mechanism 3 along the guide rail in sequence. During the pushing process, the carrier is positioned by the blocking cylinder 8. When the carrier is positioned, the piston rods of the fourth cylinder 702 and the fifth cylinder 703 extend, and the first clamping bracket 704 and the second clamping bracket 705 slide to the side away from the mounting seat 701. Then the first cylinder 301 drives the lifting bracket 302 to support the carrier to rise to the welding station. At this time, the upper part of the battery cell module on the carrier is in contact with the bottom surface of the mounting seat 701, and the fourth cylinder 702 and the fifth cylinder 703 are in contact with each other. The piston rod is retracted, and the first clamping bracket 704 and the second clamping bracket 705 slide toward the battery module for clamping. Then, the first linear modules 501 on both sides of the frame 1 drive the CCD camera 503 to move to the side of the first clamping bracket 704. The CCD camera 503 takes pictures of the various tabs exposed at the mouth-shaped groove 7041 of the battery module to detect whether the tabs are at the solder joint position of the reflow wafer. After the detection is completed, the second linear module 601 drives the distance sensor 604 to slide beside the first clamping bracket 704, and the distance sensor 604 detects the various tabs exposed at the mouth-shaped groove 7041 and the solder joint position of the reflow wafer. Whether the distance between the distance sensors 604 is within the qualified range, after the inspection is completed, the third linear module 603 drives the lifting platform 605 to a suitable height, and then the piston rod of the third cylinder 606 extends, so that the pressing block 607 passes through the mouth-shaped groove 7041 on the first clamping bracket 704 to press the tab onto the reflow sheet of the battery cell, and then the laser welding device 2 passes through the exhaust hood 608 and the give way groove 9 on the pressure head 607 to weld the tab. The exhaust gas generated during the welding process is extracted by the exhaust hood 608. After the welding process is completed, the first linear module 501 drives the slide 502 to slide again, and the CCD camera 5 03 Take photos of each tab after welding to check whether there are welding defects. During the above three inspection processes, if defective products and defects appear in any inspection process, an alarm will be triggered for manual processing. After the welding is completed, the fourth cylinder 702 and the fifth cylinder 703 drive the first clamping bracket 704 and the second clamping bracket 705 to release the carrier and the battery module. Then the piston rods of the third cylinder 606 and the first cylinder 301 are retracted in turn, and the piston rod of the second cylinder 401 is extended. The floating plate 402 lifts the welded carrier up, and then the electric roller 403 drives the carrier to slide to the auxiliary roller 303 for unloading.

[0037] In the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] The above embodiments are used to further illustrate the present invention, but the present invention is not limited to these specific embodiments. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be understood to be within the scope of protection of the present invention.

Claims

1. An automatic welding detection equipment for battery tabs of new energy vehicles, characterized by: The invention comprises a frame (1) and a laser welding device (2), wherein a guide rail, a plurality of tray lifting mechanisms (3) and a plurality of auxiliary loading and unloading mechanisms (4) are provided in the middle of the frame (1), wherein the tray lifting mechanism (3) comprises a first cylinder (301), a lifting bracket (302) and an auxiliary roller (303), wherein the auxiliary loading and unloading mechanism (4) comprises a second cylinder (401), a floating plate (402) and an electric roller (403), and a visual detection mechanism (5) and an air extraction distance measurement component (6) are provided on both sides of the frame (1), wherein the visual detection mechanism (5) comprises a first linear module (501), a slide (502) and a CCD camera (503), and wherein the air extraction distance measurement component (6) comprises a second linear module ( 601), a seat plate (602), a third linear module (603), a distance sensor (604), a lifting platform (605), a third cylinder (606), a pressure block (607) and an exhaust hood (608), the frame (1) is provided with an omnidirectional clamping mechanism (7) above each tray lifting mechanism (3), the omnidirectional clamping mechanism (7) comprising a mounting seat (701), a fourth cylinder (702), a fifth cylinder (703), a first clamping bracket (704), a second clamping bracket (705) and a connecting screw (706), the second linear module (601) is fixedly connected to the frame (1), the seat plate (602) is fixedly connected to the moving platform of the second linear module (601), and the third cylinder (606) is fixedly connected to the moving platform of the second linear module (601). The third linear module (603) and the distance sensor (604) are both fixedly connected to the seat plate (602), the lifting platform (605) is fixedly connected to the moving platform of the third linear module (603), the pressure block (607) is slidably connected to the lifting platform (605), the third cylinder (606) is fixedly connected to the lifting platform (605), the piston rod of the third cylinder (606) is fixedly connected to the pressure block (607), the exhaust hood (608) is fixedly connected to the side of the pressure block (607) close to the third cylinder (606), the mounting seat (701) is fixedly connected to the frame (1), the first clamping bracket (704) and the second clamping bracket (705) each have two, the two The first clamping bracket (704) is arranged in parallel on both sides of the mounting base (701), and the two second clamping brackets (705) are arranged in parallel on the other two sides of the mounting base (701). The shell of the fourth cylinder (702) is fixedly connected to the first clamping bracket (704), and the piston rod of the fourth cylinder (702) is fixedly connected to the mounting base (701). The shell of the fifth cylinder (703) is fixedly connected to a second clamping bracket (705), and the piston rod of the fifth cylinder (703) is fixedly connected to another second clamping bracket (705) through a connecting screw (706). The first clamping bracket (704) and the second clamping bracket (705) are both slidably connected to the mounting base (701).

2. The automatic welding detection equipment for battery tabs of new energy vehicles according to claim 1 is characterized in that: The first cylinder (301) is fixedly connected to the frame (1), the lifting bracket (302) is slidably connected to the frame (1), the auxiliary roller (303) is rotatably connected to the lifting bracket (302), and blocking cylinders (8) are fixedly connected to both sides of each tray lifting mechanism (3) on the frame (1).

3. The automatic welding detection equipment for battery tabs of new energy vehicles according to claim 1 is characterized in that: The first linear module (501) is fixedly connected to the frame (1), the seat plate (602) is slidably connected to the frame (1), the slide (502) is fixedly connected to the moving platform of the first linear module (501), and the CCD camera (503) is fixedly connected to the slide (502).

4. The automatic welding detection equipment for battery tabs of new energy vehicles according to claim 1, characterized in that: The laser welding device (2) comprises a driving component and a laser welding head, wherein the laser welding head is fixedly connected to the output end of the driving component.

5. The automatic welding detection equipment for battery tabs of new energy vehicles according to claim 1, characterized in that: A mouth-shaped groove is formed on the first clamping bracket (704), and a clearance groove is formed on both the pressing block (607) and the exhaust hood (608), and the clearance groove and the mouth-shaped groove are both arranged corresponding to the laser welding device (2).

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