Appearance detection equipment and appearance detection method for blade battery shell

Abstract

The invention discloses appearance detection equipment and an appearance detection method for a blade battery shell. The appearance detection equipment comprises a front shell detection device, a steering and material switching device, a rear shell detection device and an unloading and sorting device, the front shell detection device comprises a shell circulating conveying line and a first detection group; the steering material switching device comprises a steering carrying mechanism. The rear shell detection device comprises a detection conveying line and a second detection group; and the unloading and sorting device comprises a classified unloading mechanism and a sorting turnover mechanism. According to the invention, comprehensive detection of the blade battery shell can be realized, the omission ratio is reduced, the detection accuracy is obviously improved, and the safety of the blade battery is indirectly improved. And by adopting grouping type detection and reasonable distribution design of detection positions, the detection operation is relatively smooth, efficient and stable. And multi-position combined detection aiming at the boss and the arc wall is realized, so that the requirements of detection classification refining items are met, and richer data support is provided for evaluating the use safety of the blade battery.

Description

Technical Field

[0001] The present invention relates to an appearance detection device and an appearance detection method for a blade battery housing, belonging to the technical field of appearance detection. Background Art

[0002] In lithium iron phosphate battery technology, through structural innovation, the battery cells are arranged in a blade shape and directly integrated into the battery pack, eliminating the traditional module design, which is a typical application of CTP (Cell to Pack) technology. The blade battery adopts a module-free design, and the battery cells are in a long strip shape and are directly fixed in the battery pack through an array arrangement. The space utilization rate is increased from 40% of traditional batteries to over 60%, and the energy density can reach 180 Wh / kg, approaching the level of ternary lithium batteries. The structure of the battery pack is simplified, the number of connecting parts and housing materials is reduced, and the weight and cost are lowered. The lithium iron phosphate material has strong thermal stability, without open fire during the needle-punch test, and the temperature is only 30 - 60 °C. It is not easy to get out of control in extreme scenarios such as extrusion and collision, and its safety performance is superior to that of ternary lithium batteries.

[0003] The battery housing is a key structure for protecting the battery cells, and it is necessary to ensure that it has no defects to avoid affecting the battery performance and safety due to water ingress, air leakage, mechanical damage, etc. Appearance detection is the first process for housing quality control, which can timely detect manufacturing defects and improve the product yield.

[0004] The blade battery housing includes a tubular structure main body, and the tubular structure main body has a top wall, a bottom wall, two side walls, and two end face cutouts. In the actual application process, the blade battery housing has been optimized. A chamfered arc wall is designed between the top wall and any adjacent side wall and between the bottom wall and any side wall. At the same time, a boss structure is designed on the bottom wall.

[0005] In traditional appearance detection, six-sided detection is adopted, that is, the distribution of six-sided detection mechanisms is carried out by rotating the detection table or a conveyor line with a turning function, and the appearance defect detection is carried out through the surface detection mechanism in sequence, and such detection mainly realizes through the image acquisition of the surface, meeting the detection requirements for defect items such as perforation, concavity and convexity, stains, scratches, cracks, etc. However, when the blade battery housing is added with structural designs such as chamfered arc walls and bosses, it cannot meet the more adaptable online detection requirements. On the one hand, it is difficult to expand its detection mechanism, and on the other hand, it is also difficult to design the detection priority and the detection production line distribution. And this case is committed to meeting the comprehensive detection of the blade battery housing and improving the efficiency of the automated production line. Summary of the Invention

[0006] The object of the present invention is to solve the deficiencies of the above-mentioned prior art. Aiming at the problems of incomplete detection of the traditional blade battery housing and poor rationality of the production line construction distribution, which cannot meet the smooth and stable operation of appearance detection, an appearance detection device and an appearance detection method for a blade battery housing are proposed.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: An appearance detection device for a blade battery housing, the blade battery housing includes a housing top wall, a housing bottom wall, two housing side walls, and two cut ends. A top surface transition arc wall is provided between the housing top wall and any of the housing side walls, a bottom surface transition arc wall is provided between the housing bottom wall and any of the housing side walls, and a boss is provided at the bottom of the housing bottom wall; It includes a front-stage housing detection device, a steering and switching material device, a rear-stage housing detection device, and a discharging and sorting device arranged in sequence along the running direction of the blade battery housing; The front-stage housing detection device includes a housing circulating conveyor line, a housing code scanning mechanism arranged in sequence along the running direction of the housing circulating conveyor line, and a first detection group for performing cut end dimension detection, cut end deformation detection, and cut end relative spacing detection; The steering and switching material device includes a steering handling mechanism for picking up the blade battery housing on the housing circulating conveyor line and performing a 90° horizontal turn; The rear-stage housing detection device includes a detection conveyor line for linearly circulating the feeding received by the steering handling mechanism, and a second detection group arranged on the conveying path of the detection conveyor line for performing housing top wall detection, housing bottom wall detection, housing side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection. At least one detection conveying interval part is provided on the detection conveyor line, and the second detection group has detection positions corresponding to the detection conveying interval part; The discharging and sorting device includes a classification discharging mechanism and a sorting turnover mechanism for material turnover between the discharging end of the detection conveyor line and the classification discharging mechanism.

[0008] Preferably, the first detection group includes a cut end dimension detection mechanism, a cut end interval dimension detection mechanism, and a cut end deformation detection mechanism arranged in sequence along the running direction of the housing circulating conveyor line; The cut end dimension detection mechanism includes two relatively arranged cut end dimension detection modules for detecting the horizontal dimension, vertical dimension, and wall thickness of the top and bottom walls of the cut end. The cut end interval dimension detection mechanism includes two spaced-apart interval detection modules located at the top of the cut end. The cut end deformation detection mechanism includes two relatively arranged cut end deformation detection modules.

[0009] Preferably, the housing code scanning mechanism includes a code scanning module with linearly adjustable displacement; The incision end size detection mechanism includes an incision end size detection platform with a horizontal linear displacement toward the incision end, and the incision end size detection module includes a plurality of image module ends arranged horizontally and spaced apart on the incision end size detection platform; The cut end interval size detection mechanism includes an interval size detection platform with lifting displacement and horizontal linear displacement, and the interval detection module is arranged on the interval size detection platform; The cut end deformation detection mechanism includes a deformation detection platform with a horizontal linear displacement toward the cut end, and the cut end deformation detection module is arranged on the deformation detection platform.

[0010] Preferably, the shell circulating conveyor line includes two circulating conveyor belts arranged in parallel and at intervals, and any of the circulating conveyor belts is provided with separating and limiting ribs distributed linearly and evenly at intervals.

[0011] Preferably, the second detection group includes a side wall detection mechanism for detecting the transition arc wall between the side wall and the bottom surface of the shell, which is sequentially arranged along the running direction of the detection conveyor line; a bottom wall detection mechanism for detecting the bottom wall of the shell and the relative position of the boss, which is opposite to the detection conveyor spacer; a boss detection mechanism for detecting the relative position of the side wall of the shell and the boss; and a top wall detection mechanism located at the top of the detection conveyor line for detecting the top wall of the shell and the transition arc wall of the top surface; The side wall detection mechanism includes two side wall detection modules that are offset and relatively arranged, the bottom wall detection mechanism includes a bottom wall detection module located at the bottom of the detection and conveying space, the boss detection mechanism includes two boss detection modules that are offset and relatively arranged, and the top wall detection mechanism includes a top wall detection module facing the top wall of the shell.

[0012] Preferably, the side wall detection mechanism comprises a side wall detection platform with a linear adjustable displacement toward the side wall of the shell, and the side wall detection module is arranged on the side wall detection platform; The bottom wall detection mechanism includes a bottom wall detection supplementary light source with a hollow portion, a bottom wall detection carrier with an arc adjustment displacement arranged at the bottom of the bottom wall detection supplementary light source, and the bottom wall detection module is arranged on the bottom wall detection carrier with the detection end of the bottom wall detection module facing the hollow portion; The boss detection mechanism includes a boss detection carrier for carrying the boss detection module; The top wall detection mechanism includes a top wall detection platform with a lifting and adjusting displacement, and the top wall detection module is arranged on the top wall detection platform.

[0013] Preferably, the back-end shell detection device includes two detection conveyor lines arranged in parallel and at intervals, and the second detection group is provided on any of the detection conveyor lines.

[0014] Preferably, the steering and handling mechanism includes a rotary handling platform with rotational displacement. Two housing picking parts corresponding to the detection conveyor line one by one are provided on the rotary handling platform. The housing picking parts are used for switching displacement between the corresponding detection conveyor line and the housing circulating conveyor line.

[0015] Preferably, the sorting and discharging mechanism includes a qualified product conveyor belt, at least one re-inspection conveyor belt, and several NG conveyor belts. The qualified product conveyor belt is communicated with the detection conveyor line. The sorting and turnover mechanism includes a sorting and turnover seat with turnover displacement and a sorting and picking end arranged on the sorting and turnover seat. An artificial re-inspection position is arranged on the conveying path of the re-inspection conveyor belt. A re-inspection code scanner, a re-inspection module, and a re-inspection display electrically connected to the re-inspection module and the re-inspection code scanner are arranged at the artificial re-inspection position.

[0016] The present invention also provides an appearance detection method for an appearance detection device of a blade battery housing, including the following steps: The blade battery housing enters the housing circulating conveyor line and sequentially passes through a housing code scanning mechanism and a first detection group along the running direction of the housing circulating conveyor line. The housing code scanning mechanism scans and records the current blade battery housing. The first detection group performs detection on the cut end size, cut end deformation, and cut end relative spacing of the passing blade battery housing and then reaches the discharge end of the housing circulating conveyor line. The steering handling mechanism of the steering and switching device picks up the blade battery housing at the discharge end of the housing circulating conveyor line, turns it horizontally by 90°, and then sends it to the loading end of the detection conveyor line. The blade battery housing passes through a second detection group along the conveying path for housing top wall detection, housing bottom wall detection, housing side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection and then reaches the discharge end. The discharging and sorting device picks up the blade battery housing through the sorting and turnover mechanism and places it into the corresponding sorting and discharging mechanism.

[0017] The beneficial effects of the present invention are mainly reflected in: 1. It can achieve a comprehensive detection of the blade battery housing, reduce the missed detection rate, significantly improve the detection accuracy, and indirectly improve the safety of the blade battery.

[0018] 2. By adopting a grouped detection and a reasonable distribution design of detection positions, the detection operation is relatively smooth, efficient, and stable.

[0019] 3. It has a combined multi-position detection for bosses and arc walls, meets the requirements of refined detection classification items, and provides richer data support for the safety evaluation of the use of blade batteries. Description of the Drawings

[0020] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings: Figure 1 It is a schematic structural diagram of an appearance detection device for a blade battery housing according to the present invention.

[0021] Figure 2 It is a schematic top view structural diagram of an appearance detection device for a blade battery housing according to the present invention.

[0022] Figure 3 It is a schematic structural diagram of a housing circulating conveyor line in an appearance detection device for a blade battery housing according to the present invention.

[0023] Figure 4 It is a schematic structural diagram of a housing code scanning mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0024] Figure 5 It is a schematic structural diagram of a cut end dimension detection mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0025] Figure 6 It is a schematic structural diagram of a cut end interval dimension detection mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0026] Figure 7 It is a schematic structural diagram of a cut end deformation detection mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0027] Figure 8 It is a schematic structural diagram of a steering and switching material device in an appearance detection device for a blade battery housing according to the present invention.

[0028] Figure 9 It is a schematic structural diagram of a detection conveyor line in an appearance detection device for a blade battery housing according to the present invention.

[0029] Figure 10 It is a schematic structural diagram of a side wall detection mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0030] Figure 11 It is a schematic structural diagram of a bottom wall detection mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0031] Figure 12 It is a schematic structural diagram of a boss detection mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0032] Figure 13 It is a schematic structural diagram of a top wall detection mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0033] Figure 14 It is a schematic structural diagram of a sorting and turnover mechanism in an appearance detection device for a blade battery housing according to the present invention.

[0034] Figure 15 It is a schematic structural diagram of a re-inspection conveyor belt in an appearance detection device for a blade battery housing according to the present invention. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] The following further elaborates on the present application with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are merely for explaining the relevant invention and not for limiting the invention. Additionally, it should be noted that only parts related to the relevant invention are shown in the drawings for the sake of convenience of description. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0037] The present invention provides an appearance detection device for a blade battery housing. As Figure 3 and Figure 6 shown, the blade battery housing 100 includes a housing top wall 110, a housing bottom wall 120, two housing side walls 130, and two cut ends 140. A top surface transition arc wall 150 is provided between the housing top wall 110 and any housing side wall 130, a bottom surface transition arc wall 160 is provided between the housing bottom wall 120 and any housing side wall, and a boss 170 is provided at the bottom of the housing bottom wall 120.

[0038] As Figures 1 to 15 shown, the appearance detection device includes a front-stage housing detection device 1, a steering and switching device 2, a rear-stage housing detection device 3, and a discharging and sorting device 4 that are sequentially arranged along the running direction of the blade battery housing 100.

[0039] The front-stage housing detection device 1 includes a housing circulating conveyor line 11, a housing code scanning mechanism 12 arranged sequentially along the running direction of the housing circulating conveyor line 11, and a first detection group 5 for performing cut end dimension detection, cut end deformation detection, and cut end relative spacing detection.

[0040] The steering and switching device 2 includes a steering handling mechanism 20 for picking up the blade battery housing on the housing circulating conveyor line and performing a 90° horizontal turn.

[0041] The post-stage housing detection device 3 includes a detection conveyor line 31 for linearly circulating the feeding of the steering handling mechanism, and a second detection group 6 arranged on the conveying path of the detection conveyor line 31 for performing housing top wall detection, housing bottom wall detection, housing side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection. At least one detection conveyor interval part 32 is provided on the detection conveyor line 31, and the second detection group has a detection position corresponding to the detection conveyor interval part.

[0042] The unloading and sorting device 4 includes a sorting and unloading mechanism 41 and a sorting turnover mechanism 42 for material turnover between the discharge end of the detection conveyor line and the sorting and unloading mechanism.

[0043] Specific implementation process and principle description: The blade battery housing 100 enters the housing circulating conveyor line 11 for conveying, and sequentially passes through the housing barcode scanning mechanism 12 and the first detection group 5 along the running direction of the housing circulating conveyor line 11. The housing barcode scanning mechanism 12 scans and records the current blade battery housing, and the first detection group performs notch end dimension detection, notch end deformation detection, and notch end relative spacing detection on the passing blade battery housing and then reaches the discharge end of the housing circulating conveyor line.

[0044] Specifically, the relative direction of the two notch ends 140 of the blade battery housing 100 is perpendicular to the running direction of the housing circulating conveyor line 11. The first detection group can realize notch end dimension detection, notch end deformation detection, and notch end relative spacing detection. Regarding the notch end dimension detection, it at least includes detection items such as the horizontal dimension, vertical dimension of the notch end, and the wall thickness of the top and bottom walls of the notch end; regarding the notch end interval dimension detection mechanism, its detection item is the spacing detection between the two notch ends, that is, the length direction dimension detection of the blade battery housing 100. The notch end deformation detection is used to collect the inner and outer contour lines of the notch end to judge the deformation situation.

[0045] Then, the steering handling mechanism 20 of the steering and switching device picks up the blade battery housing at the discharge end of the housing circulating conveyor line, turns it horizontally by 90° and sends it to the loading end of the detection conveyor line. At this time, the length direction of the blade battery housing is the same as the conveying path direction. The blade battery housing 100 passes through the second detection group along the conveying path for housing top wall detection, housing bottom wall detection, housing side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection and then reaches the discharge end.

[0046] Finally, the unloading and sorting device picks up the blade battery housing through the sorting turnover mechanism 42 and puts it into the corresponding sorting and unloading mechanism 41, and sorts and classifies according to the detection results.

[0047] In a specific embodiment, the first detection group 5 includes a notch end size detection mechanism 51, a notch end interval size detection mechanism 52, and a notch end deformation detection mechanism 53 that are sequentially arranged along the running direction of the housing circulation conveyor line.

[0048] The notch end size detection mechanism 51 includes two notch end size detection modules 510 that are oppositely arranged and used to detect the horizontal dimension, vertical dimension, and wall thickness of the top and bottom walls of the notch end. The notch end interval size detection mechanism includes two spaced-apart interval detection modules 520 located at the top of the notch end. The notch end deformation detection mechanism 53 includes two oppositely arranged notch end deformation detection modules 530.

[0049] Specifically, by using the notch end size detection modules 510 facing each other, each notch end size detection module 510 correspondingly detects the opposite notch end 140 to meet the horizontal dimension, vertical dimension, and wall thickness of the top and bottom walls of the notch end. It should be noted that the horizontal dimension is the inner wall width dimension and outer wall width dimension of the notch end, the vertical dimension is the inner wall height dimension and outer wall height dimension of the notch end, and the wall thickness of the top and bottom walls can be calculated or independently identified. In addition, the wall thickness of the side wall of the notch end can also be calculated or independently identified. As long as it is an independent detection mechanism that can meet the horizontal dimension, vertical dimension, and wall thickness identification, it is within the protection scope of this case.

[0050] The two interval detection modules 520 of the notch end interval size detection mechanism respectively correspond to the plane positions of one notch end 140. By monitoring and identifying the position degrees of the planes of the two notch ends 140, the dimension in the length direction can be detected. It should be noted that the housing is relatively long in the length direction, and the traditional single-position visual acquisition or wide-angle acquisition cannot meet the detection accuracy of the dimension in the length direction. Therefore, this detection scheme is adopted.

[0051] The notch end deformation detection module 530 mainly processes the image acquisition data of the notch end 140, such as height difference and contrast, and then identifies the inner and outer contour lines of the notch end 140 to meet its deformation situation. As long as it can independently judge the deformation situation of the notch end 140, it is within the protection scope of this case.

[0052] It should be noted that the distribution order of the notch end size detection mechanism 51, the notch end interval size detection mechanism 52, and the notch end deformation detection mechanism 53 is determined.

[0053] First, the dimensional requirements for the blade battery housing are relatively high, so its priority is the highest. When the dimensions are determined to be NG, the product cannot be assembled at the backend. On this basis, a design is carried out with the front placement of the notch end dimension detection mechanism 51 and the notch end interval dimension detection mechanism 52. In addition, the notch end dimension detection mechanism 51 has more detection items and a longer operation cycle, so it is set before the notch end interval dimension detection mechanism 52. In this way, during the conveying process on the loop line, it can obtain a longer operation response time and there will be no situation where the detection result of the previous process does not appear in the image for the subsequent detection after changing the station.

[0054] That is, the battery housing passes through the notch end dimension detection mechanism 51, the notch end interval dimension detection mechanism 52, and the notch end deformation detection mechanism 53 in sequence. The notch end dimension detection mechanism 51 and the notch end interval dimension detection mechanism 52 are necessary items. After the necessary items are detected as qualified, it is necessary to perform the deformation detection of the notch end deformation detection mechanism 53.

[0055] In a specific embodiment, as Figure 4 shown, the housing code scanning mechanism 12 includes a code scanning module 121 with linear displacement adjustment.

[0056] Specifically, the housing code scanning mechanism 12 has a gantry, and there is a code scanning slide on the gantry. The code scanning module 121 is set on the code scanning slide, and it can be adjusted according to the identification positions of different blade battery housings to meet the requirements of positional tolerance adaptation.

[0057] As Figure 5 shown, the notch end dimension detection mechanism 51 includes a notch end dimension detection stage 511 with horizontal linear displacement towards the notch end. The notch end dimension detection module 510 includes a number of image module ends 512 arranged at intervals horizontally on the notch end dimension detection stage.

[0058] Specifically, through multiple image module ends 512 with different horizontal positions, it meets the requirements for image and positional tolerance data collection of the two side walls of the notch end, so that the width direction dimension is more accurate. And multiple image module ends 512 can realize the thickness direction dimension detection of multiple positional tolerances, thus realizing the thickness detection of multiple interval positional tolerances in the width direction. The dimensional tolerance detection is more comprehensive and reliable.

[0059] As Figure 6 shown, the notch end interval dimension detection mechanism includes an interval dimension detection stage 521 with lifting displacement and horizontal linear displacement. The interval detection module is set on the interval dimension detection stage.

[0060] It can be adjusted according to different specifications of blade battery housings to meet the relative positional tolerance requirements of the interval detection module.

[0061] As Figure 7As shown, the incision end deformation detection mechanism includes a deformation detection stage 531 with a horizontal linear displacement towards the incision end, and the incision end deformation detection module is arranged on the deformation detection stage.

[0062] In this way, it can adapt to the adjustment of the relative position degree of the incision ends of blade battery casings with different specifications.

[0063] In a specific embodiment, as Figure 3 shown, the housing circulating conveyor line 11 includes two parallel and spaced circulating conveyor belts 111, and evenly spaced dividing and limiting ribs 112 are arranged on any one of the circulating conveyor belts. The relative distance between the two circulating conveyor belts 111 is adjustable.

[0064] In this way, it can adapt to the adaptation and adjustment requirements of blade battery casings with various length differences. In addition, it can meet the spacing and positioning of adjacent blade batteries, with high transmission position accuracy and accurate positioning.

[0065] In a specific embodiment, the second detection group 6 includes a side wall detection mechanism 61 for detecting the transition arc wall between the side wall and the bottom surface of the housing, arranged in sequence along the running direction of the detection conveyor line, a bottom wall detection mechanism 62 for detecting the bottom wall of the housing and the relative position degree of the boss, opposite to the detection conveyor interval part, a boss detection mechanism 63 for detecting the relative position degree between the side wall of the boss and the side wall of the housing, and a top wall detection mechanism 64 located at the top of the detection conveyor line for detecting the transition arc wall between the top wall of the housing and the top surface.

[0066] The side wall detection mechanism 61 includes two side wall detection modules 610 arranged opposite to each other with a dislocation. The bottom wall detection mechanism includes a bottom wall detection module 620 located at the bottom of the detection conveyor interval part. The boss detection mechanism includes two boss detection modules 630 arranged opposite to each other with a dislocation. The top wall detection mechanism includes a top wall detection module 640 facing the top wall of the housing.

[0067] Specifically, the side wall detection module 610, the bottom wall detection module 620, the boss detection module 630, and the top wall detection module 640 all adopt line code scanning detection. It meets the long-range line scanning and complete detection requirements of the top wall 110 of the housing, the bottom wall 120 of the housing, the two side walls 130 of the housing, the top surface transition arc wall 150, and the bottom surface transition arc wall 160.

[0068] Among them, the side wall detection module 610 can perform line code scanning on the side wall 130 of the housing, so as to detect the side wall 130 of the housing and the ground transition arc wall 160. Through the line scanning detection of the detection conveyor interval part 32, the bottom wall detection module 620 can realize the detection of the bottom wall of the housing, the detection of the surface of the boss, and the detection of the relative position degree of the boss on the bottom wall of the housing. The boss detection module 630 can realize the side wall detection of the boss and the detection of the relative position degree between the boss and the side wall of the housing. The top wall detection mechanism 64 can realize the detection of the top wall of the housing and the top surface transition arc wall.

[0069] It should be noted that the side wall detection module 610 can also detect the top surface transition arc wall, and the bottom wall detection module 620 can also detect the bottom surface transition arc wall. With such a design, the top surface transition arc wall, the bottom surface transition arc wall, and the boss are all detected bidirectionally, so the detection and judgment are more comprehensive.

[0070] In a specific embodiment, as Figure 10 shown, the side wall detection mechanism 61 includes a side wall detection stage 611 that can linearly adjust the displacement towards the side wall of the housing, and the side wall detection module is arranged on the side wall detection stage.

[0071] In this way, the detection stroke adaptation adjustment requirements are met.

[0072] As Figure 11 shown, the bottom wall detection mechanism 62 includes a bottom wall detection supplementary light source 621 with a hollow part, and a bottom wall detection stage 622 with an arc adjustment displacement arranged at the bottom of the bottom wall detection supplementary light source. The bottom wall detection module is arranged on the bottom wall detection stage and the detection end of the bottom wall detection module faces the hollow part.

[0073] By adopting the design of the bottom wall detection supplementary light source 621 with a hollow part, the fixed-point supplementary light requirement for passing through the detection conveying interval part 32 is met. By adopting the design of the bottom wall detection stage 622 with an arc adjustment displacement, the relative stroke adjustment requirement for line scanning is met, and at the same time, the position of the supplementary light source does not need to be adjusted. In this way, the adaptability is relatively strong.

[0074] As Figure 12 shown, the boss detection mechanism 63 includes a boss detection carrier 631 for carrying the boss detection module. The boss detection carrier 631 has a linear adjustment displacement to meet the adjustment requirements.

[0075] As Figure 13 shown, the top wall detection mechanism 64 includes a top wall detection stage 641 with a lifting adjustment displacement, and the top wall detection module is arranged on the top wall detection stage.

[0076] In this way, different detection stroke adjustment requirements are met, which is convenient for the flexible debugging and adjustment of battery housings of various specifications.

[0077] In a specific embodiment, as Figure 1 and Figure 2 shown, the subsequent housing detection device 3 includes two parallel and spaced detection conveying lines 31, and a second detection group 6 is arranged on any detection conveying line.

[0078] That is, a one-to-two detection line combination is adopted. The first detection group 5 performs efficient detection at the front end, and the second detection group 6 at the rear end performs more detailed and comprehensive surface detection. In this way, the combined operation is efficient and smooth.

[0079] In a specific embodiment, asFigure 8 As shown, the steering and handling mechanism 20 includes a rotating handling platform 21 with rotational displacement. Two housing picking parts 22 corresponding to the detection conveyor lines one by one are provided on the rotating handling platform. The housing picking parts are used to switch the displacement between the corresponding detection conveyor line and the housing circulating conveyor line.

[0080] Specifically described, as Figure 2 and Figure 8 shown, the central angle between the two housing picking parts 22 relative to the center of the rotating handling platform 21 is 90°. In this way, the rotating handling platform only needs three 90° hover position controls to meet the requirements of tidal operation. When one housing picking part 22 faces the housing circulating conveyor line 11, the other housing picking part 22 faces the detection conveyor line 31. In this way, the tidal turnover of materials is more efficient and smooth.

[0081] In a specific embodiment, as Figure 1 , Figure 2 , Figure 14 , Figure 15 shown, the sorting and discharging mechanism 41 includes a good product conveyor belt 411, at least one re-inspection conveyor belt 412, and several NG conveyor belts 413. The good product conveyor belt is connected to the detection conveyor line. The sorting and turnover mechanism 42 includes a sorting and turnover seat 421 with turnover displacement and a sorting and picking end 422 provided on the sorting and turnover seat.

[0082] An artificial re-inspection position 4120 is provided on the conveying path of the re-inspection conveyor belt 412. The artificial re-inspection position 4120 is provided with a re-inspection barcode scanner, a re-inspection module, and a re-inspection display electrically connected to the re-inspection module and the re-inspection barcode scanner.

[0083] Specifically described, the front-end first detection group 5 and the second detection group 6 perform their respective detections. The rear-end sorting and turnover mechanism 42 sorts and discharges the detected blade battery housings according to the detection results.

[0084] Among them, the qualified products are directly conveyed through the good product conveyor belt 411. When there are products with suspected detections, they are picked up by the sorting and picking end 422 and placed on the re-inspection conveyor belt 412. After passing through the artificial re-inspection position 4120 for manual re-inspection, when the product is NG, it is classified and placed on the corresponding NG conveyor belt 413 according to its defects.

[0085] Among them, when the artificial re-inspection position 4120 performs re-inspection, the current suspected blade battery housing is scanned and entered through the re-inspection barcode scanner. The housing is manually aligned and scanned or image collected through the re-inspection module, and the image data is displayed through the re-inspection display to meet the need to magnify human eye recognition.

[0086] In a specific embodiment, as Figure 14As shown in the figure, the sorting and turnover mechanism 42 includes a number of linear frames. On any linear frame, there is a sorting and turnover seat 421. Each sorting and turnover seat 421 corresponds to a discharge end and has a lifting displacement.

[0087] The discharge ends of the sorting and turnover seats 421 respectively correspond to a double-layer classification conveyor belt. That is, through the linear displacement cooperation of a double-layer classification conveyor belt and the sorting and turnover seat 421, a one-to-two distribution can be achieved.

[0088] Such as Figure 1 、 Figure 2 、 Figure 15 , two re-inspection conveyor belts 412 are adopted. By cooperating a double-layer classification conveyor belt with a sorting and turnover seat 421, the adjustment requirements for the differential distribution of the battery casings on the two re-inspection conveyor belts 412 can be met. In this way, the sorting is more efficient and flexible.

[0089] A specific description of the appearance detection method of the appearance detection device for a blade battery casing of the present invention is as follows: The blade battery casing 100 enters the casing circulation conveyor line 11 for transportation, and sequentially passes through the casing bar code scanning mechanism 12 and the first detection group 5 along the running direction of the casing circulation conveyor line 11. The casing bar code scanning mechanism 12 scans and records the current blade battery casing, and the first detection group performs detection on the cut end size, cut end deformation, and relative distance between cut ends of the passed blade battery casing and then reaches the discharge end of the casing circulation conveyor line.

[0090] Specifically, the relative directions of the two cut ends 140 of the blade battery casing 100 are perpendicular to the running direction of the casing circulation conveyor line 11. Passing through the first detection group can realize the detection of the cut end size, cut end deformation, and relative distance between cut ends. Regarding the description of the cut end size detection, it at least includes the detection items of the horizontal dimension, vertical dimension of the cut end, and the wall thickness of the top wall and bottom wall of the cut end; regarding the description of the cut end interval size detection mechanism, its detection item is the detection of the distance between the two cut ends, that is, the length direction dimension detection of the blade battery casing 100. The cut end deformation detection is used to collect the inner and outer contour lines of the cut end to judge the deformation situation.

[0091] Among them, the first detection group 5 is the priority detection, that is, it realizes the detection of the length direction dimension, width direction dimension, and various detection items of the cut end of the blade battery casing 100. When any detection item defect appears in the first detection group 5, it means that it is NG and there is no need to pass through the second detection group for detection.

[0092] Next, the steering and handling mechanism 20 of the steering and switching material device picks up the blade battery housing at the discharge end of the housing circulating conveyor line, turns it horizontally by 90°, and then sends it to the loading end of the inspection conveyor line. At this time, the length direction of the blade battery housing is the same as the conveying path direction. The blade battery housing 100 passes through the second inspection group along the conveying path for housing top wall inspection, housing bottom wall inspection, housing side wall inspection, boss inspection, top surface transition arc wall inspection, and bottom surface transition arc wall inspection, and then reaches the discharge end.

[0093] The above inspections of the second inspection group 6 are specifically surface defect inspections, and comprehensive judgments are made according to the defect items, so as to meet the requirements of accurate sorting and classification.

[0094] Finally, the unloading and sorting device picks up the blade battery housing through the sorting and turnover mechanism 42 and places it into the corresponding sorting and unloading mechanism 41, and performs sorting and classification according to the inspection results.

[0095] Through the above description, it can be found that it can achieve a comprehensive inspection of the blade battery housing, reduce the missed inspection rate, significantly improve the inspection accuracy, and indirectly improve the safety of the blade battery. The adoption of grouped inspections and a reasonable distribution design of inspection positions makes the inspection operation more smooth, efficient and stable. It has a combined multi-position inspection for bosses and arc walls, meets the requirements of refined inspection and classification items, and provides richer data support for the safety evaluation of the use of blade batteries.

[0096] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus / device comprising a series of elements includes not only those elements but also other elements not expressly listed, or also elements inherent in these processes, methods, articles, or apparatus / device.

[0097] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An appearance detection device for a blade battery housing, the blade battery housing including a housing top wall, a housing bottom wall, two housing side walls, and two cut ends, a top surface transition arc wall being provided between the housing top wall and any one of the housing side walls, a bottom surface transition arc wall being provided between the housing bottom wall and any one of the housing side walls, and a boss being provided at the bottom of the housing bottom wall; characterized in that: It includes a front-stage housing detection device, a steering and switching material device, a rear-stage housing detection device, and a discharging and sorting device that are sequentially arranged along the running direction of the blade battery housing; The front-stage housing detection device includes a housing circulating conveyor line, a housing code scanning mechanism arranged sequentially along the running direction of the housing circulating conveyor line, and a first detection group for performing cut end size detection, cut end deformation detection, and cut end relative spacing detection; The steering and switching material device includes a steering handling mechanism for picking up the blade battery housing on the housing circulating conveyor line and performing a 90° horizontal turn; The rear-stage housing detection device includes a detection conveyor line for receiving the feeding of the steering handling mechanism for linear turnover, and a second detection group arranged on the conveying path of the detection conveyor line for performing housing top wall detection, housing bottom wall detection, housing side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection. At least one detection conveying interval part is provided on the detection conveyor line, and the second detection group has detection positions corresponding to the detection conveying interval parts; The discharging and sorting device includes a classification discharging mechanism and a sorting turnover mechanism for material turnover between the discharging end of the detection conveyor line and the classification discharging mechanism.

2. The appearance detection device for a blade battery housing according to claim 1, characterized in that: The first detection group includes a cut end size detection mechanism, a cut end interval size detection mechanism, and a cut end deformation detection mechanism that are sequentially arranged along the running direction of the housing circulating conveyor line; The cut end size detection mechanism includes two relatively arranged cut end size detection modules for detecting the horizontal dimension, vertical dimension, and wall thickness of the top and bottom walls of the cut end. The cut end interval size detection mechanism includes two spaced-apart interval detection modules located at the top of the cut end. The cut end deformation detection mechanism includes two relatively arranged cut end deformation detection modules.

3. The appearance detection device for a blade battery housing according to claim 2, characterized in that: The housing code scanning mechanism includes a code scanning module with linear adjustment displacement; The cut end size detection mechanism includes a cut end size detection stage with horizontal linear displacement towards the cut end. The cut end size detection module includes a number of image module ends arranged horizontally and spaced apart on the cut end size detection stage; The cut end interval size detection mechanism includes an interval size detection stage with lifting displacement and horizontal linear displacement, and the interval detection module is arranged on the interval size detection stage; The incision end deformation detection mechanism includes a deformation detection stage with a horizontal linear displacement towards the incision end, and the incision end deformation detection module is arranged on the deformation detection stage.

4. The appearance detection device for a blade battery housing according to claim 2, wherein: The housing circulating conveyor line includes two parallel and spaced circulating conveyor belts, and any of the circulating conveyor belts is provided with evenly spaced dividing and limiting ribs.

5. The appearance detection device for a blade battery housing according to claim 1, wherein: The second detection group includes a side wall detection mechanism for detecting the transition arc wall between the side wall and the bottom surface of the housing, arranged in sequence along the running direction of the detection conveyor line; a bottom wall detection mechanism opposite to the detection conveyor interval for detecting the bottom wall of the housing and the relative position degree of the boss, arranged opposite to the detection conveyor interval; a boss detection mechanism for detecting the relative position degree between the side wall and the boss of the housing; and a top wall detection mechanism located at the top of the detection conveyor line for detecting the transition arc wall between the top wall and the top surface of the housing. The side wall detection mechanism includes two side wall detection modules arranged in a staggered and opposite manner. The bottom wall detection mechanism includes a bottom wall detection supplementary light source with a hollow part, and a bottom wall detection stage with an arc-shaped adjustable displacement arranged at the bottom of the bottom wall detection supplementary light source. The bottom wall detection module is arranged on the bottom wall detection stage and the detection end of the bottom wall detection module faces the hollow part. The boss detection mechanism includes a boss detection carrier for carrying the boss detection module. The top wall detection mechanism includes a top wall detection stage with a lifting and adjustable displacement, and the top wall detection module is arranged on the top wall detection stage.

6. The appearance detection device for a blade battery housing according to claim 5, wherein: The side wall detection mechanism includes a side wall detection stage with a linear adjustable displacement towards the side wall of the housing, and the side wall detection module is arranged on the side wall detection stage. The bottom wall detection mechanism includes a bottom wall detection supplementary light source with a hollow part, and a bottom wall detection stage with an arc-shaped adjustable displacement arranged at the bottom of the bottom wall detection supplementary light source. The bottom wall detection module is arranged on the bottom wall detection stage and the detection end of the bottom wall detection module faces the hollow part. The boss detection mechanism includes a boss detection carrier for carrying the boss detection module. The top wall detection mechanism includes a top wall detection stage with a lifting and adjustable displacement, and the top wall detection module is arranged on the top wall detection stage.

7. The appearance detection device for a blade battery housing according to claim 5, wherein: The subsequent housing detection device includes two parallel and spaced detection conveyor lines, and any of the detection conveyor lines is provided with the second detection group.

8. The appearance detection device for a blade battery housing according to claim 7, wherein: The steering handling mechanism includes a rotating handling stage with a rotational displacement, and two housing picking parts corresponding to the detection conveyor lines are arranged on the rotating handling stage. The housing picking parts are used for switching displacements between the corresponding detection conveyor lines and the housing circulating conveyor line.

9. The appearance detection device for a blade battery housing according to claim 1, wherein: The classification and unloading mechanism includes a good product conveyor belt, at least one re-inspection conveyor belt, and several NG conveyor belts. The good product conveyor belt is communicated with the detection conveyor line. The sorting and turnover mechanism includes a sorting and turnover seat with turnover displacement and a sorting and picking end arranged on the sorting and turnover seat. An artificial re-inspection position is arranged on the conveying path of the re-inspection conveyor belt. The artificial re-inspection position is provided with a re-inspection code scanner, a re-inspection module, and a re-inspection display electrically connected to the re-inspection module and the re-inspection code scanner.

10. The appearance detection method of an appearance detection device for a blade battery housing according to any one of claims 1 to 9, characterized in that It includes the following steps: The blade battery case enters the case circulating conveyor line and sequentially passes through a case code scanning mechanism and a first detection group along the running direction of the case circulating conveyor line. The case code scanning mechanism scans and records the current blade battery case, and the first detection group performs detection on the cut end size, cut end deformation, and cut end relative spacing of the passing blade battery case and then reaches the discharge end of the case circulating conveyor line. The steering and transfer mechanism of the steering and switching device picks up the blade battery case on the discharge end of the case circulating conveyor line, turns it horizontally by 90° and sends it to the loading end of the detection conveyor line. The blade battery case passes through a second detection group along the conveying path for case top wall detection, case bottom wall detection, case side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection and then reaches the discharge end. The unloading and sorting device picks up the blade battery case through the sorting and turnover mechanism and places it into the corresponding classification and unloading mechanism.

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