Visual inspection device for battery cell tab

Abstract

The invention discloses a visual inspection device for a battery cell tab, and relates to the field of visual inspection equipment, the visual inspection device comprises a main rack, and the main rack is sequentially provided with a first manipulator, a visual inspection mechanism, a second manipulator and a third manipulator along a jig circulation conveying line. According to the invention, the turnover defect detection of the battery cell tab can be fully automatically completed, the detection precision and efficiency are improved compared with manual detection, and compared with the existing detection equipment in the market, the manual carrying is reduced, the working efficiency is improved, and the possible adverse effect on the battery cell in the manual carrying process can be avoided. In addition, the jig circulating conveying line is provided with a correcting mechanism and a first belt conveyor carrying a plurality of jigs, and each jig comprises a supporting table and limiting pieces on the two sides of the supporting table. During use, the jig is used for carrying out bottom supporting and left-right positioning on the battery cell, the aligning mechanism is used for carrying out front-back positioning on the battery cell, and the first belt conveyor is used for conveying the positioned battery cell.

Description

Technical Field

[0001] The present invention relates to the field of visual inspection equipment, and in particular to a visual inspection device for a battery cell tab. Background Art

[0002] The wound battery cell is a manufacturing process for lithium-ion batteries. The core process is to wind the positive electrode sheet, negative electrode sheet and separator into a core roll in a certain order. The part of the positive and negative electrode sheets extending out of the separator is called the tab.

[0003] The development trend of new energy is very large, and the requirements for products are getting higher and higher, and the precision requirements are also relatively high, so products need to be tested. Tab detection is one of the important inspection items of battery cells. The existing market equipment can only be tested off-line, which requires manual movement, is time-consuming and labor-intensive, and has low production efficiency. Therefore, it is necessary to design a fully automatic detection device suitable for assembly line production to improve the efficiency and accuracy of battery tab detection. Summary of the invention

[0004] The purpose of the present invention is to provide a visual inspection device for a battery cell tab, which aims to overcome the problems existing in the prior art.

[0005] To achieve the purpose, the present invention provides the following technical solutions: A visual inspection device for a battery cell tab comprises a main frame, wherein the main frame is provided with a jig circulation conveyor line; the jig circulation conveyor line comprises a first belt conveyor, wherein a plurality of jigs are arranged on the belt of the first belt conveyor along a conveying direction, wherein the jig comprises a support platform and a stopper, wherein the support platform is fixedly provided on the belt, and the support platform is used to abut against the bottom surface of the battery cell; the stoppers are spaced apart on both sides of the left and right sides of the support platform along the conveying direction of the belt, and the two stoppers are used to abut against the left and right sides of the battery cell respectively; The main frame is arranged along the fixture circulation conveyor line in sequence: The first manipulator is used to grab the battery cell and place the battery cell in the jig at the upstream end of the jig circulation conveyor line; Visual inspection mechanism, used to photograph the tabs of the battery cells on the jig circulation conveyor line and detect whether the tabs have defects; The second robot is used to remove the battery cells with defective tabs from the jig circulation conveyor line; The third robot is used to remove the battery cells with qualified tabs from the jig circulation conveyor line.

[0006] Further, the first manipulator, the second manipulator and the third manipulator each include at least one gripping unit; the gripping unit includes a mounting seat, a first double-headed cylinder, a first L-shaped claw and a pressure plate, the mounting seat is fixedly provided with a first double-headed telescopic cylinder in a left-right direction, the two piston rods of the first double-headed telescopic cylinder are fixedly provided with a first connecting seat, the first connecting seat is provided with a first L-shaped claw, and the first connecting seat is provided with a pressure plate which can be moved up and down by the first cylinder; the first L-shaped claw is used to abut against the lower end surface of the chip, the pressure plate is used to abut against the upper end surface of the chip, and the pressure plate and the first L-shaped claw are opposite to each other up and down; The limiting member is provided with a second clearance groove, and the second clearance groove is used for inserting the first L-shaped claw.

[0007] Furthermore, the clamping unit further comprises a second double-headed cylinder and a second L-shaped claw, the mounting seat is fixedly provided with a second double-headed telescopic cylinder in a front-to-back direction, the two piston rods of the second double-headed telescopic cylinder are fixedly provided with a second connecting seat, the second connecting seat is provided with a second L-shaped claw, and the second L-shaped claw is used to abut against the lower end surface of the chip; The support platform comprises a plurality of support blocks arranged at intervals, and a first clearance groove is formed between at least two of the support blocks arranged at intervals, and the first clearance groove is used for inserting the second L-shaped supporting claw.

[0008] Furthermore, the first manipulator includes a first two-dimensional electric slide, a first mounting plate and a gripping unit, the main frame is movably provided with two first mounting plates through the first two-dimensional electric slide, and each first mounting plate is provided with two gripping units; The second manipulator includes a second two-dimensional electric slide, a second mounting plate and the clamping unit, and the main frame is movably provided with a second mounting plate through the second two-dimensional electric slide, and the second mounting plate is provided with the clamping unit; the third manipulator includes a third two-dimensional electric slide, a third mounting plate and the clamping unit, and the main frame is movably provided with a third mounting plate through the third two-dimensional electric slide, and the third mounting plate is provided with the clamping unit.

[0009] Further, the belt of the first belt conveyor is installed between two vertically arranged first guide plates, and the belt is equipped with a first mounting frame between two adjacent jigs, the first mounting frame is provided with two first rollers, and the two first rollers respectively roll and abut against the two first guide plates; the main frame is horizontally provided with second guide plates on both the front and rear sides of the belt, and the belt is equipped with a second mounting frame between two adjacent jigs, the second mounting frame is provided with two second rollers, and the two second rollers respectively roll and abut against the two second guide plates.

[0010] Furthermore, the visual inspection device also includes a straightening mechanism, which is located at the upstream end of the jig circulation conveyor line, and includes a driving device and two clamps. The main frame is provided with a clamp that can be moved forward and backward on both the front and rear sides of the jig, and is equipped with a driving device that allows the two clamps to open and close with each other by moving forward and backward. The two clamps are respectively used to abut the front and rear sides of the battery cell.

[0011] Furthermore, the visual inspection device also includes a visual positioning mechanism; the visual positioning mechanism is used to photograph the jigs of the jig circulation conveyor line and the battery cells they carry, and to pause the jig circulation conveyor line when the battery cells reach a predetermined position, so that the jig circulation conveyor line can cooperate with the first manipulator, the visual inspection mechanism, the second manipulator, and the third manipulator to complete corresponding operations.

[0012] Furthermore, the visual inspection device also includes an NG product conveyor line and an OK product temporary storage table, wherein the OK product temporary storage table is erected above the NG product conveyor line, and the upstream end of the NG product conveyor line is connected to the second robot process, and the OK product temporary storage table is connected to the third robot process.

[0013] Furthermore, the main frame is provided with two jig circulation conveying lines, which are parallel to each other, and are staggeredly arranged one in front of the other, and one high and one low.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention can fully automatically complete the detection of folding defects of battery cell pole ears. Compared with manual detection, the detection accuracy and efficiency are improved. Compared with the existing detection equipment on the market, it reduces manual handling, improves work efficiency, and can avoid the adverse effects on the battery cells that may be caused by manual handling. In the jig circulation conveyor line disclosed therein, a straightening mechanism and a first belt conveyor carrying a plurality of jigs are provided, and the jig includes a support table and limiters on both sides thereof. When in use, the jig supports the bottom and positions the battery cell left and right, the straightening mechanism positions the battery cell front and back, and the first belt conveyor conveys the positioned battery cell. It can be seen that the jig and the straightening mechanism of the present invention can quickly and accurately position and place the battery cell, and complete the transportation of the battery cell with the help of the first belt conveyor, as well as the circulation of the jig, which can greatly improve the efficiency of battery cell production and save manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 for Figure 1 Enlarged schematic diagram of part A.

[0017] Figure 3 It is a structural schematic diagram of the jig circulation conveyor line in the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the downstream end of the jig circulation conveyor line in the present invention.

[0019] Figure 5 This is a schematic diagram of the structure of the middle part of the jig circulation conveyor line in the present invention.

[0020] Figure 6 It is a structural schematic diagram of the upstream end of the jig circulation conveyor line and the alignment mechanism in the present invention.

[0021] Figure 7 This is a schematic structural diagram of the first manipulator in the present invention.

[0022] Figure 8 It is a structural schematic diagram of the clamping unit in the present invention.

[0023] Fig. 9 It is a structural schematic diagram of the visual positioning mechanism in the present invention.

[0024] Fig.10 It is a structural schematic diagram of the visual detection mechanism in the present invention.

[0025] Fig.11 This is a schematic structural diagram of the second manipulator in the present invention.

[0026] Fig.12 This is a schematic structural diagram of the third robot in the present invention.

[0027] Fig.13 This is a schematic diagram of the structure of the NG product conveyor line in the present invention.

[0028] Fig.14 This is a simplified structural schematic diagram of a battery cell in the present invention. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0030] like Figure 1 and Figure 2 As shown, a visual inspection device for a battery cell tab includes a main frame 1-1, and the main frame 1-1 is provided with a jig circulation conveyor line 1-3. The number of the jig circulation conveyor lines 1-3 is two, and the two jig circulation conveyor lines 1-3 are extended in the left and right directions. They are parallel to each other, and are arranged one in front of the other, one high and one low. This can make the equipment more compact and facilitate the assembly of the devices of each station along the two jig circulation conveyor lines 1-3, and even the two jig circulation conveyor lines 1-3 can share a part or mechanism.

[0031] (I) Fixture circulation conveyor line 1-3 like Figure 1-Figure 5 As shown, the jig circulation conveyor line 1-3 includes a frame 1, which is a part of the main frame 1-1. The frame 1 is provided with a first belt conveyor 2, and a plurality of jigs 23 are arranged on the belt 22 of the first belt conveyor 2 along the conveying direction.

[0032] The first belt conveyor 2 includes a reduction motor 21, a belt 22 and a first guide plate 26. The left and right ends (i.e., the upstream end and the downstream end) of the belt 22 are rollably disposed between two vertically disposed first guide plates 26 through rollers, and one of the first guide plates 26 is fixed with a reduction motor 21. The output shaft of the reduction motor 21 is transmission-connected to one of the rollers to drive the roller to rotate, thereby indirectly rolling the belt 22. Since the first belt conveyor 2 belongs to conventional technology, other specific structures are not described here.

[0033] like Figure 1-Figure 5 ,as well as Fig.14 As shown, the fixture 23 is used to place the battery cell a and position the battery cell a left and right. The fixture 23 includes a support platform and a stopper 232. The belt 22 is fixed with the support platform, and the support platform abuts against the bottom surface of the battery cell a. The belt 22 is provided with stoppers 232 at intervals on both sides of the support platform along the conveying direction. The two stoppers 232 are used to abut against the left and right sides of the battery cell a respectively.

[0034] Preferably, the support platform is composed of four support blocks 231, and the four support blocks 231 are arranged at intervals along the conveying direction of the belt 22. A rubber pad is provided on the upper end surface of the support block 231 to protect the battery cell a. The two support blocks 231 at both ends are provided with an extension portion 2311, and the extension portion 2311 is used to abut the bottom surface of the pole lug a1 of the battery cell a to support the pole lug a1. A first clearance groove 2310 is formed between the two spaced support blocks 231 in the middle, and the first clearance groove 2310 is used to facilitate the robot to remove the battery cell a from the middle. Of course, the number of support blocks 231 can be increased or decreased as needed, and is not limited to four. The number of first clearance grooves 2310 can also be increased or decreased as needed.

[0035] Preferably, the limiting member 232 is provided with a second clearance groove 2320, which, in conjunction with the interval between the limiting member 232 and the above-mentioned support platform, facilitates the robot arm to remove the discharge core a from the left and right sides.

[0036] like Figure 1-Figure 5As shown, the belt 22 is provided with a plurality of first mounting frames 25 arranged along the conveying direction, and the first mounting frames 25 are provided with two first rollers 251, and the two first rollers 251 respectively roll against the two first guide plates 26. The first rollers 251 cooperate with the first guide plates 26 to prevent the belt 22 from shifting forward and backward during the rolling process, thereby preventing the jig 23 from shifting forward and backward relative to the slapping mechanism 1-4.

[0037] Preferably, the belt 22 is equipped with two first mounting frames 25 carrying first rollers 251 between two adjacent jigs 23. Of course, the number of the first mounting frames 25 can be increased or decreased as needed.

[0038] Preferably, the jig 23 also includes a fixed block 230, which is detachably fixed to the belt 22, and two support blocks 231, a limit member 232 and a first mounting frame 25 carrying a first roller 251 are detachably fixed to a fixed block 230, so as to facilitate the loading, unloading and replacement of the jig 23.

[0039] like Figure 1-Figure 5 As shown, the frame 1 is horizontally provided with second guide plates 10 on both the front and rear sides of the belt 22, and the belt 22 is provided with a plurality of second mounting frames 24 arranged along the conveying direction, and the second mounting frames 24 are provided with two second rollers 241, and the two second rollers 241 respectively roll against the two second guide plates 10. The second rollers 241 cooperate with the second guide plates 10 to prevent the lower half of the belt 22 from being stretched and drooping due to gravity, thereby preventing the belt 22 from being deformed, and making the operation of the device more stable and reliable.

[0040] Preferably, the belt 22 is equipped with a second mounting frame 24 carrying a second roller 241 between two adjacent jigs 23. Of course, the number of the second mounting frames 24 can be increased or decreased as needed.

[0041] Preferably, the belt 22 is equipped with two first mounting frames 25 carrying first rollers 251 and a second mounting frame 24 carrying a second roller 241 between two adjacent jigs 23 , and the second mounting frame 24 is located between the two first mounting frames 25 .

[0042] Preferably, the frame 1 is provided with a dust removal device 40 in the middle of the first belt conveyor 2. Specifically, the dust removal device 40 is a jet dust removal device for cleaning the belt 22 and the fixture 23. It mainly includes a flat nozzle 401 and a baffle 402, both of which are fixed to the frame 1, and the baffle 402 is provided with a through hole 4021. The jet outlet of the flat nozzle 401 faces the through hole 4021, and jets toward the lower half of the belt 22 and the fixture 23 to achieve the purpose of dust removal and cleaning.

[0043] like Figures 1 to 13 As shown, the visual inspection device is arranged along the jig circulation conveyor line 1-3 and includes a first manipulator 1-2, a slapping mechanism 1-4, a visual positioning mechanism 1-5, a visual inspection mechanism 1-6, a second manipulator 1-7, a third manipulator 1-8 and an NG product conveyor line 1-9. The following process sequence introduces their specific structures.

[0044] 2. The first robot like Figure 1-Figure 9 ,as well as Fig.14 The first manipulator 1-2 is used to grab the battery cell a and place the battery cell a in the fixture 23 at the upstream end of the fixture circulation conveyor line 1-3.

[0045] Specifically, the first manipulator 1-2 has four clamping units 44, and the four clamping units 44 are grouped in pairs. The first manipulator 1-2 includes a frame 2 41, a first two-dimensional electric slide 42, a first mounting plate 43 and a clamping unit 44. The frame 2 41 is a part of the main frame 1-1, and it is movably provided with two first mounting plates 43 through the first two-dimensional electric slide 42, and each first mounting plate is provided with two clamping units 44. Specifically, the first two-dimensional electric slide 42 includes a first horizontal sliding module 421. Since the visual inspection device has two jig circulation conveying lines 1-3, the first horizontal sliding module 421 is equipped with two slides. A first lifting sliding module 422 is provided on each slide, and a first mounting plate 43 is fixedly installed on the slide of each first lifting sliding module 422, and each first mounting plate 43 is provided with two clamping units 44 arranged left and right. The first horizontal sliding module 421 and the first lifting sliding module 422 are existing linear sliding modules, and their specific structures are not described in detail here.

[0046] Specifically, the clamping unit 44 includes a mounting seat 441, a first double-headed cylinder 442, a first connecting seat 443, a first L-shaped claw 444, a first cylinder 445, a pressing plate 446, a second double-headed cylinder 447, a second connecting seat 448, and a second L-shaped claw 449. The mounting seat 441 is fixedly provided with a first double-headed telescopic cylinder 442 in a left-right direction, and both piston rods of the first double-headed telescopic cylinder 442 are fixedly provided with a first connecting seat 443. The first connecting seat 443 is provided with a first L-shaped claw 444, and the first connecting seat 443 is provided with a pressing plate 446 that can be moved up and down through the first cylinder 445. The first L-shaped claw 444 is used to abut against the lower end surface of the chip a, and the pressing plate 446 is used to abut against the upper end surface of the chip, and the pressing plate 446 and the first L-shaped claw 444 are opposed to each other up and down to facilitate clamping the chip a. The mounting seat 441 is also fixed with a second double-headed telescopic cylinder 447 in the front-to-back direction, and the two piston rods of the second double-headed telescopic cylinder 447 are fixed with a second connecting seat 448. The second connecting seat 448 is provided with a second L-shaped claw 449, and the second L-shaped claw 449 is used to abut the lower end surface of the chip a.

[0047] The first L-shaped claws and the pressure plate on the left and right sides can quickly and stably clamp the left and right sides of the battery cell to automatically grasp the battery cell. The second L-shaped claws on the front and rear sides can lift the middle of the battery cell from the front and rear sides to prevent the battery cell from deformation, better protect the battery cell, and avoid the tabs.

[0048] Preferably, the first connection seat 443 is provided with a first slider 4432 which can slide up and down, and is provided with a first compression spring 4431 which enables the first slider 4432 to move up and down. The first cylinder 445 and the first L-shaped claw 444 are respectively fixed on both sides of the first slider 4432, so that the first cylinder 445 and the first L-shaped claw 444 can be arranged on the first connection seat 443 in a floating manner up and down. In addition, the second connection seat 448 is provided with a second slider 4482 which can slide up and down, and is provided with a second compression spring 4481 which enables the second slider 4482 to move up and down. The second L-shaped claw 449 is fixed with the first slider 4432, so that the second L-shaped claw 449 can be arranged on the second connection seat 448 in a floating manner up and down. This design can prevent the first manipulator 1-2 from directly and rigidly contacting with the jig 23, the tray and other carriers when it moves down in the process of removing the battery cell a, and can play a good protective role for the first manipulator 1-2, the jig 23 and the battery cell a.

[0049] When used in conjunction with the jig 23 , the first L-shaped claws 444 on the left and right sides are inserted into the second clearance grooves 2320 of the jig 23 , and the second L-shaped claws 449 on the front and rear sides are inserted into the first clearance grooves 2310 of the jig 23 , so as to smoothly transfer the chip a to the jig 23 .

[0050] (III) Shooting institution like Figure 1-Figure 6 ,as well as Fig.14 As shown, the alignment mechanism 1-4 is assembled at the upstream end of the jig circulation conveyor line 1-3, and is used to perform front and rear positioning of the battery cell a placed in the jig 23 by the first manipulator 1-2.

[0051] Specifically, the alignment mechanism 1-4 includes a driving device and two clamping plates 32. The frame 1 is provided with a clamping plate 32 that can be moved forward and backward on both the front and rear sides of the fixture 23, and is equipped with a driving device 31 that allows the two clamping plates 32 to be mutually opened and closed by moving forward and backward. The two clamping plates 32 are respectively used to abut the front and rear sides of the battery cell a to achieve the front and rear positioning of the battery cell a. The driving device 31 includes but is not limited to two telescopic cylinders facing forward and backward.

[0052] Preferably, the clamping plate 32 spans across the two fixtures 23 along the conveying direction to facilitate positioning of two battery cells a at the same time.

[0053] (IV) Visual positioning mechanism like Figure 1 , Figure 2 , Figure 3 , Fig. 9 as well as Fig.14 As shown, the visual positioning mechanism 1-5 is used to shoot the jig 23 of the jig circulation conveyor line 1-3 and the battery cell a carried thereon, and to pause the jig circulation conveyor line 1-3 when the battery cell a reaches a predetermined position. At this time, each jig 23 of the jig circulation conveyor line 1-3 and the battery cell a carried thereon are just at each workstation, which facilitates the first manipulator 1-2, the alignment mechanism 1-4, the visual positioning mechanism 1-5, the visual inspection mechanism 1-6, the second manipulator 1-7, the third manipulator 1-8 and the NG product conveyor line 1-9 to complete corresponding operations.

[0054] Specifically, the visual positioning mechanism 1-5 includes a rack three 91, a positioning camera 92, a host computer (not shown in the figure) and a barcode scanner 93. Rack three 91 is a part of the main rack 1-1. Rack three 91 is fixed with a number of positioning cameras 92. The lens of the positioning camera 92 faces downward and is located above the jig circulation conveyor line 1-3. The jig 23 and the battery cell a it carries are photographed from top to bottom, and the image is collected and uploaded to the host computer. The host computer controls the jig circulation conveyor line 1-3 based on whether the jig 23 and the battery cell a it carries are in place according to the image. In addition, when the jig circulation conveyor line 1-3 is paused, the barcode scanner 93 scans the label attached to the upper surface of the battery cell a and uploads the product information carried by the label to the host computer.

[0055] (V) Visual inspection agency like Figure 1-Figure 5 , Fig.10 and Fig.14As shown, the visual inspection mechanism 1-6 is used to photograph the tab a1 of the battery cell a on the jig circulation conveyor line 1-3, and detect whether the tab a1 has defects, including but not limited to folding defects.

[0056] Specifically, the visual inspection mechanism 1-6 includes a rack 4 51 and a detection camera 52. The rack 4 51 is a part of the main rack 1-1, and a number of detection cameras 52 are arranged horizontally on the rack 4 51. Specifically, a light shield 53 is fixedly provided at the upper end of the rack 4 51, and a first mounting port 531 and a second mounting port 532 are provided on one side of the light shield, and two jig circulation conveyor lines 1-3 are laid on the first mounting port 531 and the second mounting port 532 respectively. The rack 4 51 is provided with a base 511 horizontally on the front side of the first mounting port 531 and the second mounting port 532, and each base 511 is provided with four detection cameras 52 arranged at intervals. The two detection cameras 52 in the same row collect images of the two tabs a1 of the same battery a and upload them to the above-mentioned host computer, and the host computer determines whether the tab has a folding defect based on the image; if there is a folding defect, the battery cell is recorded as an NG product, otherwise the battery cell is an OK product, which is convenient for subsequent sorting.

[0057] Preferably, the base 511 is a linear sliding module, and the detection camera 52 is arranged on the frame 51 so as to be movable left and right and adjustable through the linear sliding module, so as to adapt to and detect battery cells a of different sizes.

[0058] (6) Second robot like Figure 1-Figure 5 , Figure 8 , Fig.11 and Fig.14 As shown, the second robot 1-7 is used to remove the battery cell a with defective tab a1 from the jig circulation conveyor line 1-3.

[0059] Specifically, the second manipulator 1-7 includes a frame 5 61, a second two-dimensional electric slide 62, a second mounting plate 63 and a gripping unit 44. The frame 5 61 is a part of the main frame 1-1, and the frame 5 61 is movably provided with a second mounting plate 63 through the second two-dimensional electric slide 62, and the second mounting plate 63 is provided with a gripping unit 44.

[0060] More specifically, the second two-dimensional electric slide 62 includes a second horizontal slide module 621, and the slide of the second horizontal slide module 621 is provided with a second lifting slide module 622. The second horizontal slide module 621 and the second lifting slide module 622 are existing linear slide modules, and their specific structures are not described here. The specific structure of the clamping unit 44 is referred to the above content, and is not described here.

[0061] Preferably, so that the second manipulator 1-7 can grab the battery cells a on two adjacent fixtures 23 on the same conveyor line, the slide of the second lifting sliding module 621 is also provided with a horizontal sliding module 64, and the slide of the horizontal sliding module 64 is provided with a clamping unit 44.

[0062] (VII) The third manipulator like Figure 1-Figure 5 , Figure 8 , Fig.12 and Fig.14 As shown, the third robot 1-8 is used to remove the battery cell a with qualified tab a1 from the jig circulation conveyor line 1-3.

[0063] Specifically, the third manipulator 1-8 includes a frame six 71, a third two-dimensional electric slide 72, a third mounting plate 73 and a gripping unit 44. The frame six 71 is a part of the main frame 1-1, and the frame six 71 is movably provided with a third mounting plate 73 through the third two-dimensional electric slide 72, and the third mounting plate 73 is provided with a gripping unit 44.

[0064] More specifically, the third manipulator 1-8 has four gripping units 44. The third manipulator 1-8 includes two third horizontal sliding modules 721 arranged opposite to each other, each third horizontal sliding module 721 has two slides, each slide is provided with a third lifting sliding module 722, each slide of the third lifting sliding module 722 is provided with a third mounting plate 73, and the third mounting plate 73 is provided with a gripping unit 44. Among them, the third horizontal sliding module 721 and the third lifting sliding module 722 are existing linear sliding modules, and their specific structures are not repeated here. The specific structure of the gripping unit 44 refers to the above content and is not repeated here.

[0065] (VIII) NG product conveyor line like Figures 1 to 14 As shown, the NG product conveyor line 1-9 includes a second belt conveyor 81, and its specific structure is not repeated here. The upstream end of the second belt conveyor 81 is connected to the second manipulator 1-7 process. The two second belt conveyors 81 are arranged in staggered layers, respectively cooperating with the two fixture circulation conveyor lines 1-3. Preferably, the NG product conveyor line 1-9 is also equipped with a jet dust removal duct 82 and a protective cover 83.

[0066] In addition, an OK product temporary storage platform 84 is set above the second belt conveyor 81 located on the upper layer, and the OK product temporary storage platform 84 is connected with the third robot 1-8 process. The OK product temporary storage platform 84 has two storage positions arranged side by side.

[0067] like Figures 1 to 14 As shown, taking one of the jig circulation conveyor lines 1-3 as an example, the main working process of the present invention is: 1. A pallet (not shown in the figure) carrying a battery cell a arrives below the first manipulator 1-2 of the visual inspection device from the upstream logistics conveyor line; 2. The first manipulator 1 - 2 transports the battery cells a two at a time to the jigs 23 of one of the jig circulation conveying lines 1 - 3 , with one battery cell a placed on each jig 23 .

[0068] 3. The alignment mechanism 1-4 clamps the battery cell a placed in front and back each time, aligns it, and completes the loading operation.

[0069] 4. When the visual positioning mechanism 1-5 detects that the jig circulation conveyor line 1-3 has moved the battery cell a into position after being aligned, the jig circulation conveyor line 1-3 is paused; at this time, the visual inspection device repeats steps 1 and 2 to complete the next loading operation. This repetition can complete the intermittent continuous loading operation; at the same time, other stations also complete their respective operations at the same pace, which will not be repeated later.

[0070] 5. The photographing mechanism 1-4 transports the battery cell a to the corresponding position of the visual inspection mechanism 1-6; the visual inspection mechanism 1-6 takes a photo of the battery cell a and its tab a1, and confirms whether there is a folding defect (the inspection results are divided into NG products and OK products). At the same time, the barcode scanner 93 obtains product information from the label attached to the battery cell a.

[0071] 6. The battery cell a is conveyed to the corresponding position of the second robot 1-7 by the straightening mechanism 1-4; the battery cell a with the tab a1 folding defect (ie, NG product) is transported to the NG product conveying line 1-9 by the second robot 1-7 to complete the sorting and unloading of NG products.

[0072] 7. The battery cell a is transported to the corresponding position of the third robot 1-8 by the squaring mechanism 1-4; when there is only one OK product among the incoming materials, the third robot 1-8 moves the OK product to the OK product temporary storage table 84 for temporary storage; when there are two OK products, the third robot 1-8 grabs them together and puts them into the tray to complete the sorting and unloading of the OK products.

[0073] It is only a specific implementation method of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A visual inspection device for a battery cell tab, characterized in that: It comprises a main frame, the main frame is provided with a jig circulation conveyor line; the jig circulation conveyor line comprises a first belt conveyor, the belt of the first belt conveyor is arranged with a plurality of jigs along the conveying direction, the jig comprises a support platform and a limiter, the belt is fixed with the support platform, and the support platform is used to abut the bottom surface of the battery cell; the belt is provided with the limiters at intervals on the left and right sides of the support platform along the conveying direction, and the two limiters are used to abut the left and right sides of the battery cell respectively; The main frame is arranged along the fixture circulation conveyor line in sequence: The first manipulator is used to grab the battery cell and place the battery cell in the jig at the upstream end of the jig circulation conveyor line; Visual inspection mechanism, used to photograph the tabs of the battery cells on the jig circulation conveyor line and detect whether the tabs have defects; The second robot is used to remove the battery cells with defective tabs from the jig circulation conveyor line; The third robot is used to remove the battery cells with qualified tabs from the jig circulation conveyor line; The first manipulator, the second manipulator and the third manipulator each include at least one gripping unit; the gripping unit includes a mounting seat, a first double-headed cylinder, a first L-shaped claw and a pressure plate; the mounting seat is fixedly provided with a first double-headed telescopic cylinder in a left-right direction; the two piston rods of the first double-headed telescopic cylinder are fixedly provided with a first connecting seat; the first connecting seat is provided with a first L-shaped claw; the first connecting seat is provided with a pressure plate which can be moved up and down by the first cylinder; the first L-shaped claw is used to abut against the lower end surface of the chip, the pressure plate is used to abut against the upper end surface of the chip, and the pressure plate and the first L-shaped claw are opposite to each other up and down; The limiting member is provided with a second clearance groove, and the second clearance groove is used for inserting the first L-shaped claw.

2. A visual inspection device for a battery cell tab according to claim 1, characterized in that: The clamping unit further includes a second double-headed cylinder and a second L-shaped claw, the mounting seat is fixedly provided with a second double-headed telescopic cylinder in a front-to-back direction, the two piston rods of the second double-headed telescopic cylinder are fixedly provided with a second connecting seat, the second connecting seat is provided with a second L-shaped claw, and the second L-shaped claw is used to abut against the lower end surface of the chip; The support platform comprises a plurality of support blocks arranged at intervals, and a first clearance groove is formed between at least two of the support blocks arranged at intervals, and the first clearance groove is used for inserting the second L-shaped supporting claw.

3. The visual inspection device for a battery cell tab according to claim 1, characterized in that: The belt of the first belt conveyor is installed between two vertically arranged first guide plates, and the belt is equipped with a first mounting frame between two adjacent jigs, and the first mounting frame is provided with two first rollers, and the two first rollers respectively roll and abut against the two first guide plates; the main frame is horizontally provided with second guide plates on both the front and rear sides of the belt, and the belt is equipped with a second mounting frame between two adjacent jigs, and the second mounting frame is provided with two second rollers, and the two second rollers respectively roll and abut against the two second guide plates.

4. The visual inspection device for a battery cell tab according to claim 1, characterized in that: The visual inspection device also includes a straightening mechanism, which is located at the upstream end of the jig circulation conveyor line and includes a driving device and two clamps. The main frame is provided with a clamp that can be moved forward and backward on both the front and rear sides of the jig, and is equipped with the driving device that allows the two clamps to open and close with each other through forward and backward movement. The two clamps are respectively used to abut the front and rear sides of the battery cell.

5. The visual inspection device for a battery cell tab according to claim 1, characterized in that: The visual inspection device also includes a visual positioning mechanism; the visual positioning mechanism is used to photograph the jigs of the jig circulation conveyor line and the battery cells they carry, and to pause the jig circulation conveyor line when the battery cells reach a predetermined position, so that the jig circulation conveyor line can cooperate with the first manipulator, the visual inspection mechanism, the second manipulator, and the third manipulator to complete corresponding operations.

6. The visual inspection device for a battery cell tab according to claim 1, characterized in that: The visual inspection device also includes an NG product conveyor line and an OK product temporary storage table. The OK product temporary storage table is set up above the NG product conveyor line, and the upstream end of the NG product conveyor line is connected to the second robot process, and the OK product temporary storage table is connected to the third robot process.

7. The visual inspection device for a battery cell tab according to claim 1, characterized in that: The main frame is provided with two jig circulation conveying lines, which are parallel to each other, and are arranged in a staggered manner, one in front and one behind, one high and one low.

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