Appearance inspection equipment and method for blade battery housing

Abstract

The present invention discloses an appearance inspection device and an appearance inspection method for blade battery shells, including a front-end shell inspection device, a steering switching device, a back-end shell inspection device, and a discharge and sorting device; the front-end shell inspection device includes a shell circulation conveyor line and a first inspection group; the steering switching device includes a steering transport mechanism; the back-end shell inspection device includes an inspection conveyor line and a second inspection group; the discharge and sorting device includes a classification discharge mechanism and a sorting turnover mechanism. The present invention can achieve comprehensive inspection of blade battery shells, reduce the missed detection rate, significantly improve the detection accuracy, and indirectly improve the safety of blade batteries. The use of grouped detection and reasonable distribution design of detection positions makes the detection operation smoother, more efficient and more stable. It has a multi-machine combined detection for bosses and arc walls, meets the requirements of detailed detection classification items, and provides richer data support for the safety evaluation of blade batteries.

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, structural innovations allow the cells to be arranged in a blade-like pattern and integrated directly into the battery pack, eliminating the traditional module design. This is a typical application of CTP (cell-to-pack) technology. Blade batteries utilize a module-free design, with long, rectangular cells arranged in an array and fixed directly within the battery pack. This increases space utilization from 40% of traditional batteries to over 60%, and allows for an energy density of 180Wh / kg, approaching that of ternary lithium batteries. This simplifies the battery pack structure, reduces connectors and casing material, and reduces weight and cost. Lithium iron phosphate material exhibits strong thermal stability, exhibiting no open flames in needle penetration tests, with temperatures ranging from 30-60°C. It is also less susceptible to loss of control in extreme scenarios such as crushing and collision, resulting in superior safety compared to ternary lithium batteries.

[0003] The battery case is a key structure that protects the battery cell. It must be free of defects to prevent water ingress, air leakage, mechanical damage, and other factors that may affect battery performance and safety. Appearance inspection is the first step in case quality control, which can promptly detect manufacturing defects and improve product yield.

[0004] The blade battery shell includes a tubular structural body, which has a top wall, a bottom wall, two side walls and two end face cuts. In actual application, the blade battery shell has been optimized, and chamfered arc walls are 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 inspection, six-sided inspection is adopted, that is, the six-sided inspection mechanisms are distributed through a rotating inspection table or a conveyor line with a flipping function, and appearance defect inspection is carried out in sequence through the surface inspection mechanisms. This type of inspection is mainly achieved by surface image acquisition to meet the detection needs of defects such as perforations, bumps, stains, scratches, and cracks. However, when the blade battery shell adds structural designs such as chamfered arc walls and bosses, it cannot meet the needs of more suitable online inspection. On the one hand, its inspection mechanism is difficult to expand, and on the other hand, the inspection priority and inspection production line distribution design are also more difficult. This case is dedicated to meeting the comprehensive inspection of blade battery shells and improving the efficiency of automated production lines. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art. Aiming at the problems that the traditional blade battery shell inspection is incomplete and the production line construction distribution is unreasonable and cannot meet the requirements of smooth and stable appearance inspection operation, a blade battery shell appearance inspection device and appearance inspection method are proposed.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A device for inspecting the appearance of a blade battery housing, the blade battery housing comprising a housing top wall, a housing bottom wall, two housing side walls, and two cutout ends; a top transition arc wall is provided between the housing top wall and any of the housing side walls; a bottom 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;

[0009] It includes a front-end shell detection device, a steering switching device, a rear-end shell detection device, and a discharge and sorting device which are sequentially arranged along the running direction of the blade battery shell;

[0010] The front-end shell detection device includes a shell circulating conveyor line, a shell code scanning mechanism arranged in sequence along the running direction of the shell circulating conveyor line, and a first detection group for detecting the size of the cut end, the deformation of the cut end, and the relative distance between the cut ends;

[0011] The turning and switching device includes a turning and transporting mechanism for picking up the blade battery shell on the shell circulation conveyor line and turning it horizontally by 90 degrees;

[0012] The back-end shell detection device includes a detection conveyor line for receiving the feeding of the steering conveying mechanism and performing linear turnover, and a second detection group arranged on the conveying path of the detection conveyor line for performing shell top wall detection, shell bottom wall detection, shell side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection. The detection conveyor line is provided with at least one detection conveying interval, and the second detection group has a detection machine position corresponding to the detection conveying interval;

[0013] The unloading and sorting device includes a classification unloading mechanism and a sorting turnover mechanism for performing material turnover between the discharge end of the detection conveying line and the classification unloading mechanism.

[0014] Preferably, 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, which are sequentially arranged along the running direction of the shell circulation conveying line;

[0015] The incision end size detection mechanism includes two relatively arranged incision end size detection modules for detecting the horizontal size, vertical size, and wall thickness of the top wall and bottom wall of the incision end; the incision end interval size detection mechanism includes two interval detection modules arranged at intervals and located at the top of the incision end; and the incision end deformation detection mechanism includes two relatively arranged incision end deformation detection modules.

[0016] Preferably, the housing code scanning mechanism includes a code scanning module with linear adjustable displacement;

[0017] 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;

[0018] The cut end spacing size detection mechanism includes a spacing size detection platform with lifting displacement and horizontal linear displacement, and the spacing detection module is arranged on the spacing size detection platform;

[0019] 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.

[0020] 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 linearly evenly spaced separating and limiting ribs.

[0021] 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;

[0022] 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.

[0023] 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;

[0024] 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;

[0025] The boss detection mechanism includes a boss detection carrier for carrying the boss detection module;

[0026] 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.

[0027] 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.

[0028] Preferably, the steering conveying mechanism includes a rotating conveying platform with rotational displacement, and the rotating conveying platform is provided with two shell picking parts corresponding to the detection conveying lines one by one, and the shell picking parts are used to switch the displacement between the corresponding detection conveying line and the shell circulation conveying line.

[0029] Preferably, 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 connected to the inspection conveyor line, and the sorting turnover mechanism includes a sorting turnover seat with turnover displacement and a sorting and picking end provided on the sorting turnover seat;

[0030] A manual re-inspection position is provided on the conveying path of the re-inspection conveyor belt, and the manual 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.

[0031] The present invention also provides an appearance inspection method of a blade battery housing appearance inspection device, comprising the following steps:

[0032] The blade battery shell enters the shell circulation conveyor line and passes through the shell code scanning mechanism and the first detection group in sequence along the running direction of the shell circulation conveyor line. The shell code scanning mechanism scans and records the current blade battery shell. The first detection group performs incision end size detection, incision end deformation detection, and incision end relative spacing detection on the blade battery shell before it reaches the discharge end of the shell circulation conveyor line;

[0033] The steering conveying mechanism of the steering switching device picks up the blade battery shell on the discharge end of the shell circulation conveyor line, turns it horizontally 90 degrees, and then sends it to the loading end of the inspection conveyor line. The blade battery shell passes through the second inspection group along the conveying path to undergo shell top wall inspection, shell bottom wall inspection, shell side wall inspection, boss inspection, top surface transition arc wall inspection, and bottom surface transition arc wall inspection before being sent to the discharge end;

[0034] The unloading and sorting device picks up the blade battery shell through the sorting turnover mechanism and puts it into the corresponding classification unloading mechanism.

[0035] The beneficial effects of the present invention are mainly reflected in:

[0036] 1. It can realize comprehensive inspection of blade battery shells, reduce the missed detection rate, significantly improve the detection accuracy, and indirectly improve the safety of blade batteries.

[0037] 2. The use of grouped detection and reasonable distribution of detection positions makes the detection operation smoother, more efficient and more stable.

[0038] 3. It is capable of multi-camera combined detection of bosses and arc walls, meeting the requirements of detailed detection classification items and providing richer data support for the safety evaluation of blade batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0040] Figure 1 It is a structural schematic diagram of an appearance inspection device for a blade battery housing according to the present invention.

[0041] Figure 2 It is a schematic top view of the structure of an appearance inspection device for a blade battery housing according to the present invention.

[0042] Figure 3 It is a structural schematic diagram of a shell circulation conveyor line in an appearance inspection device for a blade battery shell of the present invention.

[0043] Figure 4 It is a structural schematic diagram of a shell code scanning mechanism in an appearance inspection device for a blade battery shell of the present invention.

[0044] Figure 5 It is a structural schematic diagram of a cut end dimension detection mechanism in an appearance detection device for a blade battery housing of the present invention.

[0045] Figure 6 The present invention is a schematic structural diagram of a cut end spacing dimension detection mechanism in an appearance detection device for a blade battery housing.

[0046] Figure 7 It is a structural schematic diagram of a cut end deformation detection mechanism in an appearance detection device for a blade battery housing of the present invention.

[0047] Figure 8 It is a structural schematic diagram of a steering switching device in an appearance inspection device for a blade battery housing of the present invention.

[0048] Figure 9 It is a structural schematic diagram of a detection conveyor line in an appearance detection device for a blade battery shell of the present invention.

[0049] Figure 10It is a structural schematic diagram of a side wall detection mechanism in an appearance detection device for a blade battery housing of the present invention.

[0050] Figure 11 It is a structural schematic diagram of a bottom wall detection mechanism in an appearance detection device for a blade battery housing of the present invention.

[0051] Figure 12 It is a structural schematic diagram of a boss detection mechanism in an appearance detection device for a blade battery housing of the present invention.

[0052] Figure 13 It is a structural schematic diagram of a top wall detection mechanism in an appearance detection device for a blade battery housing of the present invention.

[0053] Figure 14 It is a structural schematic diagram of a sorting turnover mechanism in an appearance inspection device for a blade battery housing of the present invention.

[0054] Figure 15 It is a structural schematic diagram of a re-inspection conveyor belt in an appearance inspection device for a blade battery housing of the present invention. DETAILED DESCRIPTION

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0056] The present application will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to explain the relevant inventions and are not intended to limit the inventions. It should also be noted that, for ease of description, only portions relevant to the relevant inventions are shown in the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of this application may be combined with each other.

[0057] The present invention provides a device for inspecting the appearance of a blade battery housing. Figure 3 and Figure 6 As 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.

[0058] like Figures 1 to 15As shown, the appearance inspection equipment includes a front-end shell inspection device 1, a steering switching device 2, a back-end shell inspection device 3, and a unloading and sorting device 4, which are arranged in sequence along the running direction of the blade battery shell 100.

[0059] The front-end shell detection device 1 includes a shell circulating conveyor line 11, a shell code scanning mechanism 12 arranged in sequence along the running direction of the shell circulating conveyor line 11, and a first detection group 5 for performing incision end size detection, incision end deformation detection, and incision end relative spacing detection.

[0060] The turning and switching device 2 includes a turning and transporting mechanism 20 for picking up the blade battery shells on the shell circulation conveyor line and turning them horizontally by 90 degrees.

[0061] The back-end shell detection device 3 includes a detection conveyor line 31 for receiving the feeding of the steering conveying mechanism for linear turnover, and a second detection group 6 arranged on the conveying path of the detection conveyor line 31 for performing shell top wall detection, shell bottom wall detection, shell side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection. At least one detection and conveying interval 32 is provided on the detection conveyor line 31, and the second detection group has a detection machine position corresponding to the detection and conveying interval.

[0062] The unloading and sorting device 4 includes a classification unloading mechanism 41 and a sorting turnover mechanism 42 for performing material turnover between the discharge end of the detection conveying line and the classification unloading mechanism.

[0063] Specific implementation process and principle description:

[0064] The blade battery shell 100 enters the shell circulation conveyor line 11 for transportation, and passes through the shell code scanning mechanism 12 and the first detection group 5 in turn along the running direction of the shell circulation conveyor line 11. The shell code scanning mechanism 12 scans and records the current blade battery shell. The first detection group performs incision end size detection, incision end deformation detection, and incision end relative spacing detection on the blade battery shell before it reaches the discharge end of the shell circulation conveyor line.

[0065] Specifically, the relative direction of the two incision ends 140 of the blade battery shell 100 is perpendicular to the running direction of the shell circulation conveyor line 11. The first detection group can realize the incision end size detection, incision end deformation detection, and incision end relative spacing detection. The incision end size detection is explained, which at least includes the horizontal size, vertical size, and wall thickness of the incision end top wall and bottom wall; the incision end spacing size detection mechanism is explained, and its detection item is the spacing detection between the two incision ends, that is, the length direction size detection of the blade battery shell 100, and the incision end deformation detection is used to collect the inner and outer contour lines of the incision end, so as to judge the deformation condition.

[0066] Then the steering and conveying mechanism 20 of the steering switching device picks up the blade battery shell on the discharge end of the shell circulation conveyor line, turns it horizontally 90 degrees, and then sends it to the loading end of the inspection conveyor line. At this time, the length direction of the blade battery shell is in the same direction as the conveying path. The blade battery shell 100 passes through the second inspection group along the conveying path for shell top wall inspection, shell bottom wall inspection, shell side wall inspection, boss inspection, top surface transition arc wall inspection, and bottom surface transition arc wall inspection before reaching the discharge end.

[0067] Finally, the unloading and sorting device picks up the blade battery shell through the sorting turnover mechanism 42 and puts it into the corresponding classification unloading mechanism 41, and sorts and classifies it according to the detection results.

[0068] In a specific embodiment, the first detection group 5 includes a cut end size detection mechanism 51, a cut end interval size detection mechanism 52, and a cut end deformation detection mechanism 53, which are sequentially arranged along the running direction of the shell circulation conveyor line.

[0069] The incision end dimension detection mechanism 51 includes two relatively arranged incision end dimension detection modules 510 for detecting the horizontal dimension, vertical dimension, and wall thickness of the top wall and bottom wall of the incision end; the incision end interval dimension detection mechanism includes two interval detection modules 520 arranged at intervals and located at the top of the incision end; the incision end deformation detection mechanism 53 includes two relatively arranged incision end deformation detection modules 530.

[0070] Specifically, relatively oriented incision end dimension detection modules 510 are used, and each incision end dimension detection module 510 corresponds to detecting the relative incision end 140, meeting the horizontal dimension, vertical dimension, and wall thickness of the top and bottom walls of the incision end. It should be noted that the horizontal dimension is the inner wall width dimension and the outer wall width dimension of the incision end, and the vertical dimension is the inner wall height dimension and the outer wall height dimension of the incision end, while 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 incision end can also be calculated or independently identified. Independent detection mechanisms that only need to meet the horizontal dimension, vertical dimension, and wall thickness identification are within the protection scope of this case.

[0071] The two interval detection modules 520 of the incision end interval dimension detection mechanism correspond to the plane position of a incision end 140 respectively. By monitoring and identifying the plane positions of the two incision ends 140, the length direction dimension can be detected. It should be noted that the shell is relatively long in the length direction, and traditional single-camera visual acquisition or wide-angle acquisition cannot meet the detection accuracy of the length direction dimension, so this detection scheme is adopted.

[0072] The incision end deformation detection module 530 mainly processes the image acquisition data of the incision end 140 by performing height difference, contrast and other processing, and then identifies the inner and outer contour lines of the incision end 140 to meet its deformation conditions. Only the detection of the deformation condition of the incision end 140 that needs to be independently judged is within the protection scope of this case.

[0073] It should be noted that the distribution order of the incision end size detection mechanism 51 , the incision end interval size detection mechanism 52 , and the incision end deformation detection mechanism 53 is fixed.

[0074] First, the blade battery housing has high dimensional requirements, so its priority is the highest. If the size is judged to be NG, the product cannot be assembled at the back end. On this basis, the incision end dimension detection mechanism 51 and the incision end interval dimension detection mechanism 52 are designed to be pre-positioned. In addition, the incision end dimension detection mechanism 51 has many detection items and a long operation cycle, so it is placed before the incision end interval dimension detection mechanism 52. In this way, during the circulation line conveying process, it can obtain a longer operation response time, and the situation where the front-end detection result does not appear in the image back-end detection after the workstation is transferred will not occur.

[0075] That is, the battery shell passes through the cut end size detection mechanism 51, the cut end interval size detection mechanism 52, and the cut end deformation detection mechanism 53 in sequence. The cut end size detection mechanism 51 and the cut end interval size detection mechanism 52 are necessary items. Only after the necessary items are tested and passed, the deformation detection of the cut end deformation detection mechanism 53 is required.

[0076] In a specific embodiment, Figure 4 As shown, the shell code scanning mechanism 12 includes a code scanning module 121 with linear adjustable displacement.

[0077] Specifically, the shell code scanning mechanism 12 has a door frame, and the door frame is provided with a code scanning slide. The code scanning module 121 is arranged on the code scanning slide, which can be adjusted according to the identification position of different blade battery shells to meet the position adaptation requirements.

[0078] like Figure 5 As shown, the incision end size detection mechanism 51 includes an incision end size detection platform 511 with horizontal linear displacement toward the incision end, and the incision end size detection module 510 includes a plurality of horizontally spaced image module ends 512 arranged on the incision end size detection platform.

[0079] Specifically, multiple image module ends 512 at different horizontal positions allow for image and position data capture of both sidewalls of the cutout, resulting in more accurate width dimensions. Multiple image module ends 512 can also detect thickness dimensions at multiple positional scales, thus enabling thickness measurements at multiple intervals along the width. This makes dimensional detection more comprehensive and reliable.

[0080] like Figure 6 As shown, the cut end interval dimension detection mechanism includes an interval dimension detection platform 521 with lifting displacement and horizontal linear displacement, and the interval detection module is arranged on the interval dimension detection platform.

[0081] It can be adjusted according to blade battery shells of different specifications to meet the relative position requirements of the interval detection module.

[0082] like Figure 7 As shown, the incision end deformation detection mechanism includes a deformation detection platform 531 with a horizontal linear displacement toward the incision end, and the incision end deformation detection module is arranged on the deformation detection platform.

[0083] In this way, the relative position adjustment of the cutout ends of blade battery shells of different specifications can be adapted.

[0084] In a specific embodiment, Figure 3 As shown, the shell circulating conveyor line 11 includes two parallel and spaced circulating conveyor belts 111, and any circulating conveyor belt is provided with linear and evenly spaced separating and limiting ribs 112. The relative distance between the two circulating conveyor belts 111 is adjustable.

[0085] This can adapt to the adaptation and adjustment needs of blade battery shells of various length differences, and can also meet the spacing and positioning of adjacent blade batteries, with high transmission position accuracy and accurate positioning.

[0086] 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 shell, which is 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 shell and the relative position of the boss, which is opposite to the detection conveying spacer, a boss detection mechanism 63 for detecting the relative position of the side wall of the shell and the boss, and a top wall detection mechanism 64 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.

[0087] The side wall detection mechanism 61 includes two side wall detection modules 610 that are offset and arranged opposite to each other, the bottom wall detection mechanism includes a bottom wall detection module 620 located at the bottom of the detection and conveying space, the boss detection mechanism includes two boss detection modules 630 that are offset and arranged opposite to each other, and the top wall detection mechanism includes a top wall detection module 640 facing the top wall of the shell.

[0088] Specifically, the sidewall inspection module 610, bottom wall inspection module 620, boss inspection module 630, and top wall inspection module 640 all employ line scanning to inspect the housing top wall 110, housing bottom wall 120, both housing sidewalls 130, top transition arc wall 150, and bottom transition arc wall 160.

[0089] Among them, the side wall detection module 610 can realize line scanning of the shell side wall 130, thereby detecting the shell side wall 130 and the ground transition arc wall 160. The bottom wall detection module 620 can realize shell bottom wall detection and boss surface detection and relative position detection of the boss on the shell bottom wall through line scanning detection of the conveying spacer 32. The boss detection module 630 can realize side wall detection of the boss and relative position detection of the boss and the shell side wall. The top wall detection mechanism 64 can realize detection of the shell top wall and the top surface transition arc wall.

[0090] 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 this design, the top surface transition arc wall, the bottom surface transition arc wall, and the boss can all be detected in two directions, so that the detection and judgment are more comprehensive.

[0091] In a specific embodiment, Figure 10 As shown, the side wall detection mechanism 61 includes a side wall detection platform 611 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.

[0092] This satisfies the need for adaptive adjustment of the detection stroke.

[0093] like Figure 11 As shown, the bottom wall detection mechanism 62 includes a bottom wall detection supplementary light source 621 with a hollow portion, and a bottom wall detection platform 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 platform and the detection end of the bottom wall detection module faces the hollow portion.

[0094] The bottom wall detection fill light source 621 with a hollow portion is designed to meet the fixed-point fill light requirements passing through the detection and conveying interval 32, while the bottom wall detection carrier 622 with arc adjustment displacement is designed to meet the relative stroke adjustment requirements of line scanning, while there is no need to adjust the fill light source position, which makes it more adaptable.

[0095] like Figure 12 As 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.

[0096] like Figure 13As shown, the top wall detection mechanism 64 includes a top wall detection platform 641 with lifting and lowering adjustable displacement, and the top wall detection module is arranged on the top wall detection platform.

[0097] This satisfies the different detection stroke adjustment requirements and facilitates flexible debugging and adjustment of battery shells of various specifications.

[0098] In a specific embodiment, Figure 1 and Figure 2 As shown, the back-end shell detection device 3 includes two detection conveyor lines 31 arranged in parallel and spaced apart, and a second detection group 6 is provided on any detection conveyor line.

[0099] That is, a one-to-two detection line is used, the first detection group 5 performs efficient front-end detection, and the second detection group 6 at the back end performs more detailed and comprehensive surface detection. This coordinated operation is efficient and smooth.

[0100] In a specific embodiment, Figure 8 As shown, the steering conveying mechanism 20 includes a rotating conveying platform 21 with rotational displacement, and the rotating conveying platform is provided with two shell picking parts 22 corresponding to the detection conveying lines one by one. The shell picking parts are used to switch the displacement between the corresponding detection conveying line and the shell circulation conveying line.

[0101] Specifically, Figure 2 and Figure 8 As shown, the angle between the two shell picking parts 22 and the center of the rotating transport platform 21 is 90°, so that the rotating transport platform only needs three 90° hovering position controls to meet the tidal operation requirements. When one shell picking part 22 is opposite to the shell circulation conveyor line 11, the other shell picking part 22 is opposite to the detection conveyor line 31, so that the tidal turnover of materials is more efficient and smooth.

[0102] In a specific embodiment, Figure 1 、 Figure 2 、 Figure 14 、 Figure 15 As shown, the classification and unloading 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 inspection conveyor line. The sorting turnover mechanism 42 includes a sorting turnover seat 421 with turnover displacement and a sorting picking end 422 arranged on the sorting turnover seat.

[0103] A manual re-inspection position 4120 is provided on the conveying path of the re-inspection conveyor belt 412. The manual 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.

[0104] Specifically, the front-end first detection group 5 and the second detection group 6 perform their own detections, and the rear-end sorting and turnover mechanism 42 sorts and classifies the detected blade battery shells according to the detection results and unloads them.

[0105] Qualified products are directly transported to the good product conveyor belt 411. When there are products with doubtful inspection, they are picked up by the sorting and picking end 422 and placed on the re-inspection conveyor belt 412. They are manually re-inspected at the manual re-inspection position 4120. When the product is NG, it is placed on the corresponding NG conveyor belt 413 according to its defect classification.

[0106] Among them, when the manual re-inspection position 4120 is re-inspected, the blade battery shell in question is scanned and entered through the re-inspection scanner, the shell is manually scanned or imaged through the re-inspection module, and the image data is displayed on the re-inspection display to meet the magnified human eye recognition requirements.

[0107] In a specific embodiment, Figure 14 As shown, the sorting turnover mechanism 42 includes a plurality of linear racks, and any linear rack is provided with a sorting turnover seat 421 . Each sorting turnover seat 421 corresponds to a discharge end and has lifting displacement.

[0108] The discharge ends of the sorting revolving seat 421 correspond to a double-layer sorting conveyor belt, that is, through the cooperation of a double-layer sorting conveyor belt and the linear displacement of the sorting revolving seat 421, a one-to-two distribution can be achieved.

[0109] like Figure 1 、 Figure 2 、 Figure 15 Two re-inspection conveyor belts 412 are used, and through the cooperation of a double-layer classification conveyor belt and a sorting turnover seat 421, the adjustment requirements for differentiated distribution of battery shells on the two re-inspection conveyor belts 412 can be met, so that sorting is more efficient and flexible.

[0110] The appearance inspection method of the blade battery housing appearance inspection device of the present invention is specifically described:

[0111] The blade battery shell 100 enters the shell circulation conveyor line 11 for transportation, and passes through the shell code scanning mechanism 12 and the first detection group 5 in turn along the running direction of the shell circulation conveyor line 11. The shell code scanning mechanism 12 scans and records the current blade battery shell. The first detection group performs incision end size detection, incision end deformation detection, and incision end relative spacing detection on the blade battery shell before it reaches the discharge end of the shell circulation conveyor line.

[0112] Specifically, the relative direction of the two incision ends 140 of the blade battery shell 100 is perpendicular to the running direction of the shell circulation conveyor line 11. The first detection group can realize the incision end size detection, incision end deformation detection, and incision end relative spacing detection. The incision end size detection is explained, which at least includes the horizontal size, vertical size, and wall thickness of the incision end top wall and bottom wall; the incision end spacing size detection mechanism is explained, and its detection item is the spacing detection between the two incision ends, that is, the length direction size detection of the blade battery shell 100, and the incision end deformation detection is used to collect the inner and outer contour lines of the incision end, so as to judge the deformation condition.

[0113] Among them, the first detection group 5 is the priority detection, that is, it realizes the detection of various detection items of the length direction dimension, width direction dimension and cut end of the blade battery shell 100. When any detection item defect occurs in the first detection group 5, it means it is NG and does not need to be detected by the second detection group.

[0114] Then the steering and conveying mechanism 20 of the steering switching device picks up the blade battery shell on the discharge end of the shell circulation conveyor line, turns it horizontally 90 degrees, and then sends it to the loading end of the inspection conveyor line. At this time, the length direction of the blade battery shell is in the same direction as the conveying path. The blade battery shell 100 passes through the second inspection group along the conveying path for shell top wall inspection, shell bottom wall inspection, shell side wall inspection, boss inspection, top surface transition arc wall inspection, and bottom surface transition arc wall inspection before reaching the discharge end.

[0115] The detection of the second detection group 6 is a specific surface defect detection, which makes a comprehensive judgment based on the defect items to meet the needs of accurate sorting and classification.

[0116] Finally, the unloading and sorting device picks up the blade battery shell through the sorting turnover mechanism 42 and puts it into the corresponding classification unloading mechanism 41, and sorts and classifies it according to the detection results.

[0117] The above description demonstrates that comprehensive inspection of blade battery housings is possible, reducing missed detection rates and significantly improving detection accuracy, indirectly enhancing blade battery safety. The use of grouped inspection and a rational distribution of inspection locations ensures smooth, efficient, and stable inspections. The ability to combine multiple inspection locations for bosses and curved walls meets the requirements for detailed inspection classification and provides richer data support for blade battery safety assessments.

[0118] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0119] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A device for inspecting the appearance of a blade battery housing, the blade battery housing comprising a housing top wall, a housing bottom wall, two housing side walls, and two cutout ends; a top transition arc wall is provided between the housing top wall and any of the housing side walls; a bottom 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; characterized in that: It includes a front-end shell detection device, a steering switching device, a rear-end shell detection device, and a discharge and sorting device which are sequentially arranged along the running direction of the blade battery shell; The front-end shell detection device includes a shell circulating conveyor line, a shell code scanning mechanism arranged in sequence along the running direction of the shell circulating conveyor line, and a first detection group for detecting the size of the cut end, the deformation of the cut end, and the relative distance between the cut ends; The turning and switching device includes a turning and transporting mechanism for picking up the blade battery shell on the shell circulation conveyor line and turning it horizontally by 90 degrees; The back-end shell detection device includes a detection conveyor line for receiving the feeding of the steering conveying mechanism and performing linear turnover, and a second detection group arranged on the conveying path of the detection conveyor line for performing shell top wall detection, shell bottom wall detection, shell side wall detection, boss detection, top surface transition arc wall detection, and bottom surface transition arc wall detection. The detection conveyor line is provided with at least one detection conveying interval, and the second detection group has a detection machine position corresponding to the detection conveying interval; The unloading and sorting device includes a classification unloading mechanism and a sorting turnover mechanism for performing material turnover between the discharge end of the detection conveying line and the classification unloading mechanism; 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, which are sequentially arranged along the running direction of the shell circulation conveyor line; The incision end dimension detection mechanism includes two oppositely arranged incision end dimension detection modules for detecting the horizontal dimension, vertical dimension, and thickness of the top and bottom walls of the incision end; the incision end interval dimension detection mechanism includes two interval detection modules located at the top of the incision end; and the incision end deformation detection mechanism includes two oppositely arranged incision end deformation detection modules. The second detection group includes a side wall detection mechanism arranged in sequence along the running direction of the detection conveyor line for detecting the transition arc wall between the side wall and the bottom surface of the shell, a bottom wall detection mechanism located opposite to the detection conveyor spacer for detecting the bottom wall of the shell and the relative position of the boss, 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.

2. The appearance inspection device for a blade battery housing according to claim 1, characterized in that: The housing code scanning mechanism includes a code scanning module with linear adjustment 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 spacing size detection mechanism includes a spacing size detection platform with lifting displacement and horizontal linear displacement, and the spacing detection module is arranged on the spacing 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.

3. The appearance inspection device for a blade battery housing according to claim 1, characterized in that: 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.

4. The appearance inspection device for a blade battery housing according to claim 1, characterized in that: The side wall detection mechanism includes 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.

5. The appearance inspection device for a blade battery housing according to claim 1, characterized in that: The back-end shell detection device includes two detection conveying lines arranged in parallel and at intervals, and the second detection group is provided on any of the detection conveying lines.

6. The appearance inspection device for a blade battery housing according to claim 5, characterized in that: The steering conveying mechanism includes a rotating conveying platform with rotational displacement, and the rotating conveying platform is provided with two shell picking parts arranged in a one-to-one correspondence with the detection conveying line. The shell picking parts are used to switch the displacement between the corresponding detection conveying line and the shell circulation conveying line.

7. The appearance inspection device for a blade battery housing according to claim 1, characterized in that: 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 connected to the inspection conveyor line. The sorting turnover mechanism includes a sorting turnover seat with turnover displacement and a sorting and picking end provided on the sorting turnover seat. A manual re-inspection position is provided on the conveying path of the re-inspection conveyor belt, and the manual 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.

8. An appearance inspection method for a blade battery housing according to any one of claims 1 to 7, characterized in that The steps include: The blade battery shell enters the shell circulation conveyor line and passes through the shell code scanning mechanism and the first detection group in sequence along the running direction of the shell circulation conveyor line. The shell code scanning mechanism scans and records the current blade battery shell. The first detection group performs incision end size detection, incision end deformation detection, and incision end relative spacing detection on the blade battery shell before it reaches the discharge end of the shell circulation conveyor line; The steering conveying mechanism of the steering switching device picks up the blade battery shell on the discharge end of the shell circulation conveyor line, turns it horizontally 90 degrees, and then sends it to the loading end of the inspection conveyor line. The blade battery shell passes through the second inspection group along the conveying path to undergo shell top wall inspection, shell bottom wall inspection, shell side wall inspection, boss inspection, top surface transition arc wall inspection, and bottom surface transition arc wall inspection before being sent to the discharge end; The unloading and sorting device picks up the blade battery shell through the sorting turnover mechanism and puts it into the corresponding classification unloading mechanism.

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