Cylindrical lithium battery shell surface quality detection device and method

Abstract

The invention relates to a cylindrical lithium battery shell surface quality detection device which comprises a bearing rack, a conveying mechanism, at least one assembly frame, at least one non-contact detection mechanism and at least one contact detection mechanism, and the non-contact detection mechanism and the contact detection mechanism are connected with the upper end face of the bearing rack through the assembly frame and located over the conveying mechanism. The axis of the non-contact detection mechanism and the axis of the contact detection mechanism are perpendicular to the axis of the conveying mechanism and the upper end face of the bearing rack, and the conveying mechanism is embedded in the upper end face of the bearing rack. According to the invention, non-contact detection, air tightness detection and ultrasonic detection operation through machine vision are realized, so that the flexibility, universality, working efficiency and precision of quality detection operation of the lithium battery shell are effectively improved, the equipment structure is effectively simplified, and the operation difficulty is reduced.

Description

Technical Field

[0001] The invention belongs to lithium battery processing equipment technology, and specifically relates to a cylindrical lithium battery shell surface quality detection device and a use method. Background Art

[0002] At present, in the production and processing of lithium batteries, the quality of lithium battery shells plays an important role in the operating performance and quality stability of lithium batteries. To address this problem, a variety of lithium battery shell quality inspection equipment has been developed, such as the "A lithium-ion battery aluminum shell burr removal quality inspection method and system" with patent application number "202211552579.3", and the "A lithium battery welding quality inspection device based on machine vision" with patent application number "202122082964.3". Although these equipment or technologies can meet the needs of use, the current equipment has different degrees of single detection means, relatively complex equipment structure, poor flexibility in equipment maintenance and function adjustment, high difficulty and relatively high cost, which leads to certain defects in the efficiency and quality of lithium battery shell quality inspection, and leads to quality risks for lithium batteries.

[0003] Based on the above problems, after researching and improving the existing problems, a cylindrical lithium battery shell surface quality detection device and a method of use are provided, aiming to solve some existing equipment problems through this device. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a cylindrical lithium battery shell surface quality detection device and a use method.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A surface quality detection device for a cylindrical lithium battery case, comprising a carrying frame, a conveying mechanism, an assembly frame, a non-contact detection mechanism, a contact detection mechanism and a driving circuit. The carrying frame is a frame structure with a rectangular axial cross-section. There is at least one non-contact detection mechanism and at least one contact detection mechanism, which are respectively connected to the upper end face of the carrying frame through the assembly frame and are located directly above the conveying mechanism. The axes of the non-contact detection mechanism and the contact detection mechanism are both vertically distributed with respect to the axis of the conveying mechanism and the upper end face of the carrying frame. The conveying mechanism is embedded in the upper end face of the carrying frame, and its axis is parallel to the upper end face of the carrying frame. It includes a belt conveyor, a carrying seat, a fitting sleeve, a flipping mechanism, a turntable mechanism, a carrying backing plate, and a telescopic push rod. Among them, the belt conveyor is embedded in the upper end face of the carrying frame and is parallel to the upper end face of the carrying frame. At the same time, both ends of the belt conveyor extend at least 10 cm beyond both ends of the carrying frame. There are several carrying seats, all of which are connected to the belt conveyor and are evenly distributed along the axis direction of the belt conveyor. The carrying seat is a "U"-shaped groove structure. Each carrying seat is provided with a fitting sleeve. The fitting sleeve is a hollow cylindrical structure. The lower half of the fitting sleeve is embedded in the groove body of the carrying seat and is hinged to the side wall of the carrying seat through the flipping mechanism. The carrying backing plate is embedded in the rear half of the fitting sleeve, is coaxially distributed with the fitting sleeve and is slidably connected to the inner side surface of the fitting sleeve. The rear end face of the carrying backing plate is connected to the front end face of the telescopic push rod through the turntable mechanism. The telescopic push rod is embedded in the rear half of the fitting sleeve and is coaxially distributed with the fitting sleeve. At the same time, the rear end face of the telescopic push rod is connected to the bottom of the fitting sleeve. The belt conveyor, the flipping mechanism, the turntable mechanism and the telescopic push rod are all electrically connected to the driving circuit. The driving circuit is connected to the outer side surface of the carrying frame and is also electrically connected to the assembly frame, the non-contact detection mechanism and the contact detection mechanism.

[0007] Further, the fitting sleeve rotates within the range of 0° - 180° through the flipping mechanism. When the rotation angle is 0° and 180°, the axis of the fitting sleeve is parallel to the upper end face of the belt conveyor. When the rotation angle is 90°, the axis of the fitting sleeve is perpendicular to the upper end face of the belt conveyor. At least three spring-type universal ball bearings evenly distributed around its axis are provided on the inner side surface of the fitting sleeve.

[0008] Furthermore, the assembly frame includes a horizontal driving guide rail, a load-bearing column, a positioning cross arm, a lifting drive mechanism and a slider, wherein there are two load-bearing columns, which are symmetrically distributed on both sides of the axis of the conveying mechanism, and each load-bearing column is vertically distributed with the upper end surface of the load-bearing frame, and is slidably connected with the upper end surface of the load-bearing frame through the horizontal driving guide rail, and the horizontal driving guide rail is parallel to the axis of the conveying mechanism. The positioning cross arm is located between the two load-bearing columns, and its two ends are respectively slidably connected with the load-bearing columns through the lifting drive mechanism, and the axis of the positioning cross arm is vertically distributed with the axis of the load-bearing column. The lifting drive mechanism is connected to the side surface of the load-bearing column and is parallel to the axis of the load-bearing column. The lower end surface of the positioning cross arm is further provided with at least one horizontal driving guide rail parallel to its axis. There are a number of sliders, which are slidably connected with the load-bearing column and the load-bearing cross arm through the lifting drive mechanism, the horizontal driving guide rail, and the lifting drive mechanism are electrically connected to the driving circuit.

[0009] Furthermore, the non-contact detection mechanism includes a bearing shell, a main control box, a main control circuit, a CCD camera, a fill light, a three-dimensional laser scanner, a serial communication circuit, a serial communication port, and a turntable mechanism. The bearing shell and the main control box are both closed cavity structures with a rectangular cross-section. The main control circuit is located in the main control box and is connected to the outer side of the assembly frame through the main control box. The bearing shell is respectively connected to the bearing columns of the assembly frame and the sliders provided by the positioning crossarms, and the rear end surface of the bearing shell connected to the slider is hinged to the front end surface of the slider through a turntable mechanism. At the same time, a CCD camera and at least two fill lights evenly distributed around the axis of the CCD camera are provided on the front end surface of the bearing shell. The outer side surface of the bearing shell is connected to at least one three-dimensional laser scanner through a turntable mechanism. The optical axis of the optical scanner intersects with the optical axis of the CCD camera, and the intersection is located 0-10 cm above the axis of the conveying mechanism. Serial communication circuits are provided in the carrying shell and the main control box, and at least one serial communication port is provided on the side surface thereof. The serial communication circuits in the carrying shell are electrically connected to the CCD camera, fill light, three-dimensional laser scanner, turntable mechanism and serial communication port provided in the carrying shell, respectively, and the serial communication circuits in the main control box are electrically connected to the main control circuit and the serial communication port, respectively. At the same time, the serial communication ports of each carrying shell are electrically connected to the serial communication ports at the main control box through wires, and are electrically connected to the main control circuit. At the same time, the main control circuit is electrically connected to the driving circuit through the serial communication circuit and the serial communication port provided in the main control box.

[0010] Further, the contact detection mechanism includes a protective wall, lifting adjustment columns, in-place sensors, detection columns, air pressure sensors, booster pumps, ultrasonic flaw detectors, control valves, and flexible diversion pipes. The protective wall has a trough-shaped structure with a "冂"-shaped cross-section, is connected to the load-bearing columns of the assembly frame through sliders, and covers the upper end surface of the conveying mechanism. At the same time, the axis of the protective wall is parallel to the axis of the conveying mechanism. An adjustment groove parallel to the axis of the conveying mechanism is provided at the top of the protective wall. There are at least two lifting adjustment columns. Each lifting adjustment column is embedded in the adjustment groove and evenly distributed along the axis of the conveying mechanism. The lifting adjustment column is connected to the side wall of the adjustment groove, and its axis is perpendicular to and intersects with the upper end surface of the conveying mechanism, and the intersection point is located on the axis of the conveying mechanism. The lower end surface of the lifting adjustment column is connected to the detection column and is coaxially distributed. The detection column has a cylindrical columnar structure, and a gas guide cavity parallel to its axis is provided inside. The upper end surface of the gas guide cavity is communicated with the control valve and is communicated with the flexible diversion pipe through the control valve. The flexible diversion pipe is also communicated with the booster pump through the control valve. An in-place sensor coaxially distributed with it is provided on the lower end surface of the detection column, and an air pressure sensor is also provided on its lower end surface. In addition, at least one detection contact of the ultrasonic flaw detector is provided on the outer side surface of the detection column. The detection contact of the ultrasonic flaw detector is electrically connected to the ultrasonic flaw detector through a flexible wire. The number of booster pumps and ultrasonic flaw detectors is the same as the number of detection columns, and each detection column forms a detection group with a booster pump and an ultrasonic flaw detector. At the same time, each booster pump and ultrasonic flaw detector are connected to the top of the protective wall. The lifting adjustment columns, in-place sensors, air pressure sensors, booster pumps, ultrasonic flaw detectors, and control valves are all electrically connected to the drive circuit.

[0011] Further, the detection column includes a rigid flow guide tube, a rigid column body, an elastic column body, an elastic sealing ring, and an elastic sealing end cover. The rigid column body has a cylindrical structure, and a gas guide cavity parallel to its axis is provided inside. The rigid flow guide tube is embedded in the gas guide cavity and coaxially distributed with the gas guide cavity. The upper end surface of the rigid flow guide tube is communicated with the control valve. The elastic column body is a hollow columnar structure coaxially distributed with the rigid column body, wrapped outside the rigid column body and coaxially distributed with the rigid column body. The upper end surface of the elastic column body is flush with the upper end surface of the rigid column body, and the length of the elastic column body is not less than 1.2 times the length of the rigid column body. The elastic sealing ring is an annular structure coaxially distributed with the rigid column body, at least three and wrapped outside the elastic column body, and each elastic sealing ring is evenly distributed along the axis direction of the elastic column body. The elastic sealing end cover has a "冂"-shaped groove structure in the axial section, wrapped on the outer side of the upper half of the elastic column body and coaxially distributed with the elastic column body. The upper end surface of the elastic sealing end cover is located 0 to 30% of the length of the rigid column body below the upper end surface of the elastic column body. At least one elastic sealing ring coaxially distributed with it is provided on the bottom of the groove and the inner side surface of the groove wall of the elastic sealing end cover. A number of assembly holes are provided on the rigid column body, and the detection contacts of the in-place sensor, the air pressure sensor, and the ultrasonic flaw detector are all connected to the rigid column body through the assembly holes.

[0012] Further, the lifting and adjusting column is any one of an electric telescopic column, a hydraulic telescopic column, and a pneumatic telescopic column. At the same time, the lifting and adjusting column is connected to the adjusting groove through a connecting mechanism. The connecting mechanism includes a guiding slide rail, a slider, a positioning clamp, a positioning pin, and a three-dimensional displacement table. There are two guiding slide rails in total, embedded in the adjusting groove, symmetrically distributed with the center line of the adjusting groove and connected to the groove wall of the adjusting groove. Both guiding slide rails are parallel to the axis of the conveying mechanism. The number of sliders is the same as the number of lifting and adjusting columns. The two ends of the slider are respectively slidably connected to the two guiding slide rails, and each slider is evenly distributed along the axis direction of the adjusting groove. The slider is connected to at least one positioning clamp through a three-dimensional displacement table and connected to a lifting and adjusting column through a vacant clamp. The slider is also connected to a positioning pin and connected to the groove wall of the adjusting groove through the positioning pin. The three-dimensional displacement table is electrically connected to the driving circuit.

[0013] Further, the lower end surface of the protective wall is connected to a number of pulleys through spring telescopic columns, and is in contact with and slidably connected to the upper end surface of the bearing frame through the pulleys. A temperature sensor and a gas sensor are further provided on the inner side surface of the protective wall. The temperature sensor and the gas sensor are both electrically connected to the driving circuit.

[0014] A method for using a surface quality detection device for a cylindrical lithium battery shell includes the following steps:

[0015] S1, equipment assembly, first assemble the bearing frame, conveying mechanism, assembly frame, non-contact detection mechanism, contact detection mechanism and driving circuit to obtain the finished product quality detection device, then install and position the quality detection device to the designated working position through the bearing frame, and on the one hand, connect the front end of the conveying mechanism with the external feeding device; on the other hand, connect the rear end of the conveying mechanism with the external collecting device, and finally, electrically connect the driving circuit with the external power supply system and remote monitoring system to complete the system preset;

[0016] S2, quality inspection operation, first drive the conveying mechanism, assembly frame, non-contact detection mechanism, and contact detection mechanism to operate at the same time, and when each assembly set of the conveying mechanism is located at the front end face position of the conveying mechanism, the assembly set axis is adjusted to be parallel to the upper end face of the conveying mechanism through the flipping mechanism; then the lithium battery shell to be inspected is inserted into the assembly set through the feeding equipment, and the telescopic push rod is contracted at the same time so that the assembly set clamps and positions the lithium battery shell to be inspected, and after the clamping and positioning are completed, it is transported by the belt conveyor, and during the transportation process, the assembly set and the lithium battery shell to be inspected connected to the assembly set are adjusted to be vertically distributed with the upper end face of the carrying frame through the flipping mechanism, and when adjusted to the vertical distribution state After the lithium battery shell to be inspected passes through the non-contact detection mechanism, the non-contact detection mechanism performs video scanning and observation on the lithium battery shell, collects the surface structural parameters of the lithium battery shell to be inspected, and detects and identifies the obvious defects on the surface of the lithium battery shell to be inspected; after the lithium battery shell to be inspected passes through the non-contact detection mechanism, it is then subjected to secondary inspection by the contact detection mechanism. During the secondary inspection by the contact detection mechanism, the contact detection mechanism detects the air tightness of the lithium battery shell to be inspected on the one hand; on the other hand, the lithium battery shell to be inspected is subjected to ultrasonic flaw detection, thereby realizing the operation of detecting subtle defects of the lithium battery shell to be inspected;

[0017] S3, lithium battery shell collection, after completing step S2, the lithium battery shell to be inspected that has completed the inspection is transported to the rear end face of the conveying mechanism through the belt conveyor, and the assembly set is driven to rotate through the flip mechanism during the transportation process, and the axis of the assembly set is parallel to the upper end face of the carrying frame, and when it is transported to the rear end face of the carrying frame and is parallel to the upper end face of the carrying frame, the telescopic push rod in the assembly set is driven to extend, so that the assembled lithium battery shell to be inspected is pushed out of the assembly set, and then the lithium battery shells to be inspected are classified and processed through subsequent collection equipment according to the inspection results in step S2.

[0018] Furthermore, in the step S2, when the contact detection mechanism performs secondary detection, the gas input into the lithium battery casing to be detected in the airtightness test is high-pressure air, an inert gas including but not limited to carbon dioxide, argon, or a mixed gas between high-pressure air and inert gas.

[0019] The present invention has good structural versatility, high system integration, automation and modularity, and realizes non-contact detection, airtightness detection and ultrasonic detection through machine vision, thereby effectively improving the flexibility, versatility, work efficiency and accuracy of lithium battery shell quality detection operations, and effectively simplifying the equipment structure and reducing the difficulty of operation; at the same time, it also effectively reduces the difficulty and cost of equipment operation and maintenance; in addition, the structure of the equipment can be effectively and flexibly adjusted according to the needs of use, and the needs of different detection operations can be met. At the same time, the equipment parts can be quickly adjusted and replaced, thereby improving the flexibility of equipment use and the ability to operate continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0021] Figure 1 It is a schematic diagram of the top view structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the local structure of the conveying mechanism from the side;

[0023] Figure 3 is a schematic diagram of the assembly rack structure;

[0024] Figure 4 It is a structural schematic diagram of the connection relationship between the non-contact detection mechanism and the assembly;

[0025] Figure 5 It is a schematic diagram of the partial structure of the contact detection mechanism in side section;

[0026] Figure 6 It is a schematic diagram of the partial structure of the whole detection column;

[0027] Figure 7 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0028] In order to facilitate the construction of the technical means, creative features, objectives and effects achieved by the present invention, the present invention is further described below in conjunction with specific implementation methods.

[0029] like Figure 1-6As shown in the figure, a surface quality detection device for a cylindrical lithium battery case includes a bearing frame 1, a conveying mechanism 2, an assembly frame 3, a non-contact detection mechanism 4, a contact detection mechanism 5 and a drive circuit 6. The bearing frame 1 is a frame structure with a rectangular axial cross-section. There is at least one non-contact detection mechanism 4 and at least one contact detection mechanism 5. They are respectively connected to the upper end surface of the bearing frame 1 through the assembly frame 1 and are located directly above the conveying mechanism 2. The axes of the non-contact detection mechanism 4 and the contact detection mechanism 5 are both perpendicular to the axis of the conveying mechanism 2 and the upper end surface of the bearing frame 1.

[0030] In this embodiment, the conveying mechanism 2 is embedded in the upper end surface of the bearing frame 1, and its axis is parallel to the upper end surface of the bearing frame 1. It includes a belt conveyor 21, a bearing seat 22, a fitting sleeve 23, a flipping mechanism 24, a turntable mechanism 25, a bearing pad 26, and a telescopic push rod 27. Among them, the belt conveyor 21 is embedded in the upper end surface of the bearing frame 1 and is parallel to the upper end surface of the bearing frame 1. At the same time, both ends of the belt conveyor 21 extend at least 10 cm beyond both ends of the bearing frame 1. There are several bearing seats 22, all of which are connected to the belt conveyor 21 and are evenly distributed along the axis of the belt conveyor 21. The bearing seat 22 is a "U"-shaped groove structure. There is a fitting sleeve in each bearing seat 22. The fitting sleeve 23 is a cylindrical hollow columnar structure. The lower half of the fitting sleeve 23 is embedded in the groove body of the bearing seat 22 and is hinged to the side wall of the bearing seat 22 through the flipping mechanism 24. The bearing pad 26 is embedded in the rear half of the fitting sleeve 23, is coaxially distributed with the fitting sleeve 23 and is slidably connected to the inner side surface of the fitting sleeve 23. The rear end surface of the bearing pad 26 is connected to the front end surface of the telescopic push rod 27 through the turntable mechanism 25. The telescopic push rod 27 is embedded in the rear half of the fitting sleeve 23 and is coaxially distributed with the fitting sleeve 23. At the same time, the rear end surface of the telescopic push rod 27 is connected to the bottom of the fitting sleeve 23. The belt conveyor 21, the flipping mechanism 24, the turntable mechanism 25 and the telescopic push rod 27 are all electrically connected to the drive circuit 6. The drive circuit 6 is connected to the outer side surface of the bearing frame 1 and is also electrically connected to the assembly frame 3, the non-contact detection mechanism 4 and the contact detection mechanism 5.

[0031] In this embodiment, the fitting sleeve 23 rotates within the range of 0° - 180° through the flipping mechanism 24. When the rotation angle is 0° and 180°, the axis of the fitting sleeve 23 is parallel to the upper end surface of the belt conveyor 21. When the rotation angle is 90°, the axis of the fitting sleeve 23 is perpendicular to the upper end surface of the belt conveyor 21. At least three spring-type universal ball bearings 28 are evenly distributed around the axis on the inner side surface of the fitting sleeve 23.

[0032] The set spring-type universal ball bearings can hold and position the lithium battery case to be detected, improving the stability of positioning.

[0033] In this embodiment, the assembly frame 3 includes a horizontal driving guide rail 31, a bearing column 32, a positioning cross arm 33, a lifting drive mechanism 34 and a slider 35, wherein the bearing columns 32 are two in total and are symmetrically distributed on both sides of the axis of the conveying mechanism 22. At the same time, each bearing column 32 is vertically distributed with respect to the upper end surface of the bearing frame 1, and is slidably connected with the upper end surface of the bearing frame 1 through the horizontal driving guide rail 31, and the horizontal driving guide rail 31 is parallel to the axis of the conveying mechanism 2, and the positioning cross arm 33 is located between the two bearing columns 32, and the two ends of the positioning cross arm 33 are respectively connected by the lifting drive mechanism 34. It is slidably connected to the load-bearing column 32, and the axis of the positioning crossarm 33 is perpendicular to the axis of the load-bearing column 32. The lifting drive mechanism 34 is connected to the side surface of the load-bearing column 32 and is parallel to the axis of the load-bearing column 32. The lower end surface of the positioning crossarm 33 is further provided with at least one horizontal driving guide rail 31 parallel to its axis. There are a number of sliders 35, which are slidably connected to the load-bearing column 32 and the load-bearing crossarm 33 through the lifting drive mechanism 34 and the horizontal driving guide rail 31 respectively. The horizontal driving guide rail 31 and the lifting drive mechanism 34 are electrically connected to the driving circuit 6.

[0034] Through the setting of the horizontal driving guide rail, on the one hand, by adjusting the working position of the assembly frame in the horizontal direction, the slider connected to the positioning crossarm can jump the needle working position in the horizontal direction; the setting of the lifting drive mechanism can adjust the positioning crossarm as a whole, and the slider connected to the load-bearing column can be adjusted in the vertical direction, so as to achieve the purpose of adjusting the working position of the non-contact detection mechanism and the contact detection mechanism.

[0035] It should be noted that the non-contact detection mechanism 4 includes a bearing shell 41, a main control box 42, a main control circuit 43, a CCD camera 44, a fill light 45, a three-dimensional laser scanner 46, a serial communication circuit 47, a serial communication port 48, and a turntable mechanism 25. The bearing shell 41 and the main control box 42 are both closed cavity structures with a rectangular cross section. The main control circuit 43 is located in the main control box 42 and is connected to the outer side of the assembly frame 3 through the main control box 42. The bearing shell 41 is respectively connected to the bearing column 32 of the assembly frame and the slider 35 provided on the positioning cross arm 33, and the rear end face of the bearing shell 41 connected to the slider 35 is hinged to the front end face of the slider 35 through the turntable mechanism 25. At the same time, a CCD camera 44 and at least two fill lights 45 evenly distributed around the axis of the CCD camera 44 are provided on the front end face of the bearing shell 41. The outer side of the bearing shell 41 is connected to at least one three-dimensional laser scanner 46 through the turntable mechanism 25. The optical axis of the three-dimensional laser scanner 46 intersects with the optical axis of the CCD camera 44, and the intersection is located 0-10 cm above the axis of the conveying mechanism 2. A serial communication circuit 47 is provided in the carrier shell 41 and the main control box 42, and at least one serial communication port 48 is provided on the side surface thereof. The serial communication circuit 47 in the carrier shell 41 is electrically connected to the CCD camera 44, the fill light 45, the three-dimensional laser scanner 46, the turntable mechanism 25 and the serial communication port 48 provided in the carrier shell 41, respectively, and the serial communication circuit 47 in the main control box 42 is electrically connected to the main control circuit 43 and the serial communication port 48, respectively. At the same time, the serial communication ports 48 of each carrier shell 41 are electrically connected to the serial communication ports 48 at the main control box 42 through wires, and are electrically connected to the main control circuit 43. At the same time, the main control circuit 43 is electrically connected to the drive circuit 6 through the serial communication circuit 47 and the serial communication port 48 provided in the main control box 42.

[0036] Further optimized, the main control circuit 43 is a circuit system based on any one of a DSP chip and an FPGA chip.

[0037] During operation, the CCD camera and fill light can realize visual inspection of scratches, contaminants and other defects on the outer surface of the lithium battery shell to be inspected; at the same time, the 3D laser scanner can accurately model, scan and identify defects such as the structural dimensions of the outer surface of the lithium battery shell to be inspected;

[0038] The serial communication circuit and serial communication port set at the same time can transmit and summarize the detection data, and the turntable mechanism set can adjust the detection angle to further improve the detection accuracy.

[0039] It should be emphasized that the contact detection mechanism 5 includes a protective wall 51, a lifting adjustment column 52, a position sensor 53, a detection column 54, a pressure sensor 55, a booster pump 56, an ultrasonic flaw detector 57, a control valve 58, and a flexible guide pipe 59. Among them, the protective wall 51 is a groove-shaped structure with a "冂"-shaped cross-section, which is connected to the load-bearing column 32 of the assembly frame 3 through a slider 35 and covers the upper end surface of the conveying mechanism 2. At the same time, the axis of the protective wall 51 is parallel to the axis of the conveying mechanism 2. An adjustment groove 50 parallel to the axis of the conveying mechanism 2 is provided at the top of the protective wall 51. There are at least two lifting adjustment columns 52, and each lifting adjustment column 52 is embedded in the adjustment groove 50 and evenly distributed along the axis of the conveying mechanism 2. The lifting adjustment column 52 is connected to the side wall of the adjustment groove 50, and its axis is vertically distributed and intersects with the upper end surface of the conveying mechanism 2, and the intersection point is located on the axis of the conveying mechanism 2. The lower end surface of the lifting adjustment column 52 is connected to the detection column 54 and is coaxially distributed. The detection column 54 is a cylindrical columnar structure, and a gas guide cavity 510 parallel to its axis is provided inside it. The upper end surface of the gas guide cavity 510 is communicated with the control valve 58 and is communicated with the flexible guide pipe 59 through the control valve 58. The flexible guide pipe 59 is also communicated with the booster pump 56 through the control valve 58. A position sensor 53 coaxially distributed with it is provided on the lower end surface of the detection column 54. At the same time, a pressure sensor 55 is also provided on its lower end surface. In addition, at least one detection contact 571 of the ultrasonic flaw detector 57 is provided on the outer side surface of the detection column 54. The detection contact 571 of the ultrasonic flaw detector 57 is electrically connected to the ultrasonic flaw detector 57 through a flexible wire. The number of the booster pumps 56 and the ultrasonic flaw detectors 57 is the same as the number of the detection columns 54, and each detection column 54 forms a detection group with a booster pump 56 and an ultrasonic flaw detector 57. At the same time, each booster pump 56 and ultrasonic flaw detector 57 are connected to the top of the protective wall 51. The lifting adjustment column 52, the position sensor 53, the pressure sensor 55, the booster pump 56, the ultrasonic flaw detector 57, and the control valve 58 are all electrically connected to the drive circuit 6.

[0040] During the detection operation, first, through the position sensor, when it is detected that the lithium battery case to be detected is conveyed directly below the detection column and the lithium battery case to be detected is in a coaxial distribution state with the detection column, the lifting adjustment column drives the detection column to descend and inserts the front half of the detection column into the lithium battery case to be detected, and seals the upper end surface of the lithium battery case to be detected. Then, on the one hand, the pressure sensor, the booster pump, and the control valve cooperate to inject high-pressure gas into the lithium battery case to be detected and maintain the pressure for a certain period of time. When the pressure is successfully maintained, it indicates that the lithium battery case to be detected has good sealing performance; otherwise, there are quality problems such as leakage. At the same time, the ultrasonic flaw detector is used to perform ultrasonic flaw detection on the lithium battery case to be detected to detect defects such as micro-cracks and sand holes in the lithium battery case to be detected.

[0041] Among them, it should be particularly noted that the detection column 54 includes a rigid diversion tube 541, a rigid column 542, an elastic column 543, an elastic sealing ring 544, and an elastic sealing end cover 545. The rigid column 542 has a cylindrical structure, and a gas guide cavity 510 parallel to its axis is provided inside. The rigid diversion tube 541 is embedded in the gas guide cavity 510 and is coaxially distributed with the gas guide cavity 510. The upper end surface of the rigid diversion tube 541 is communicated with the control valve 58. The elastic column 543 is a hollow columnar structure coaxially distributed with the rigid column 542, is wrapped outside the rigid column 542 and is coaxially distributed with the rigid column 542. The upper end surface of the elastic column 543 is flush with the upper end surface of the rigid column 542, and the length of the elastic column 543 is not less than 1.2 times the length of the rigid column 542. The elastic sealing ring 544 is a ring-shaped structure coaxially distributed with the rigid column 542, at least three and is wrapped outside the elastic column 543, and the elastic sealing rings 544 are evenly distributed along the axis direction of the elastic column 543. The elastic sealing end cover 545 has a groove-shaped structure with a "冂" - shaped axial cross - section, is wrapped on the outer side of the upper half of the elastic column 543, and is coaxially distributed with the elastic column 543. The upper end surface of the elastic sealing end cover 545 is located 0 to 30% of the length of the rigid column 543 below the upper end surface of the elastic column 543. At least one elastic sealing ring 544 coaxially distributed with it is provided on the bottom of the groove and the inner side surface of the groove wall of the elastic sealing end cover 544. A number of assembly holes 546 are further provided on the rigid column 542, and the detection contacts 571 of the in - place sensor 53, the air pressure sensor 55, and the ultrasonic flaw detector 57 are all connected to the rigid column 542 through the assembly holes 546.

[0042] The rigid column can improve the strength of the detection column and meet the need for installation and positioning of devices such as the in - place sensor. The elastic column and the elastic sealing ring provided can, on the one hand, reduce the frictional damage to the lithium - battery shell to be detected during the detection operation, and at the same time can seal the lithium - battery shell to be detected, preventing air leakage through the gap between the side wall of the lithium - battery shell to be detected and the detection column and affecting the detection accuracy; at the same time, the elastic sealing end cover provided further improves the sealing effect on the port position of the lithium - battery shell to be detected.

[0043] In addition, the lifting and adjusting column 52 is any one of an electric telescopic column, a hydraulic telescopic column, and a pneumatic telescopic column. At the same time, the lifting and adjusting column 52 is connected to the adjusting groove 50 through a connecting mechanism, and the connecting mechanism includes a guide rail 501, a slider 35, a positioning clamp 502, a positioning pin 503, and a three-dimensional displacement platform 504. There are two guide rails 501, which are embedded in the adjusting groove 50, symmetrically distributed along the center line of the adjusting groove 50 and connected to the groove wall of the adjusting groove 50, and the two guide rails 501 are distributed parallel to the axis of the conveying mechanism 2. The number of the sliders 35 is consistent with the number of the lifting adjustment columns 52, and the two ends of the sliders 35 are respectively slidably connected to the two guide rails 501, and each slider 35 is evenly distributed along the axial direction of the adjustment groove 50. The slider 35 is connected to at least one positioning clamp 502 through a three-dimensional displacement platform 504, and is connected to a lifting adjustment column 52 through an empty clamp 502. The slider 35 is also connected to a positioning pin 503, and is connected to the groove wall of the adjustment groove 50 through the positioning pin 503. The three-dimensional displacement platform 504 is electrically connected to the drive circuit 6.

[0044] Through the set guide rail, the working position and number of the lifting and adjusting columns along the axis direction of the conveying mechanism can be flexibly set. At the same time, the working position of the lifting and adjusting columns can be further fine-tuned through the set three-dimensional displacement platform, so as to adjust the equipment structure according to the needs of use, improve the work efficiency of the equipment detection operation, and improve the reliability and stability of the overall operation of the equipment.

[0045] Further optimized, the lower end surface of the protective wall 51 is connected to a plurality of pulleys 8 through a spring telescopic column 7, and is abutted and slidably connected to the upper end surface of the supporting frame 1 through the pulley 8. A temperature sensor 9 and a gas sensor 10 are further provided on the inner side surface of the protective wall 51, and the temperature sensor 9 and the gas sensor 10 are both electrically connected to the drive circuit 6.

[0046] The set temperature sensor detects the environment of the detection operation, and the set gas sensor can detect the gas composition in the detection environment within the protective wall. When the booster pump injects inert gas, special detection gas including marking gas, etc. into the shell of the lithium battery to be detected, when the special detection gas is detected in the protective wall space, it means that there is a gas leakage in the shell of the lithium battery to be detected, that is, the shell of the lithium battery to be detected has an airtight defect.

[0047] Further optimized, the driving circuit 6 is a circuit system based on a programmable controller.

[0048] Further optimized, the lifting drive mechanism 34 is any one of a linear motor, a screw mechanism, a gear rack mechanism, a hydraulic telescopic column, a pneumatic telescopic column, and an electric telescopic column.

[0049] like Figure 7 As shown, a method for using a cylindrical lithium battery shell surface quality detection device comprises the following steps:

[0050] S1, equipment assembly, first assemble the bearing frame, conveying mechanism, assembly frame, non-contact detection mechanism, contact detection mechanism and driving circuit to obtain the finished product quality detection device, then install and position the quality detection device to the designated working position through the bearing frame, and on the one hand, connect the front end of the conveying mechanism with the external feeding device; on the other hand, connect the rear end of the conveying mechanism with the external collecting device, and finally, electrically connect the driving circuit with the external power supply system and remote monitoring system to complete the system preset;

[0051] S2, quality inspection operation, first drive the conveying mechanism, assembly frame, non-contact detection mechanism, and contact detection mechanism to operate at the same time, and when each assembly set of the conveying mechanism is located at the front end face position of the conveying mechanism, the assembly set axis is adjusted to be parallel to the upper end face of the conveying mechanism through the flipping mechanism; then the lithium battery shell to be inspected is inserted into the assembly set through the feeding equipment, and the telescopic push rod is contracted at the same time so that the assembly set clamps and positions the lithium battery shell to be inspected, and after the clamping and positioning are completed, it is transported by the belt conveyor, and during the transportation process, the assembly set and the lithium battery shell to be inspected connected to the assembly set are adjusted to be vertically distributed with the upper end face of the carrying frame through the flipping mechanism, and when adjusted to the vertical distribution state After the lithium battery shell to be inspected passes through the non-contact detection mechanism, the non-contact detection mechanism performs video scanning and observation on the lithium battery shell, collects the surface structural parameters of the lithium battery shell to be inspected, and detects and identifies the obvious defects on the surface of the lithium battery shell to be inspected; after the lithium battery shell to be inspected passes through the non-contact detection mechanism, it is then subjected to secondary inspection by the contact detection mechanism. During the secondary inspection by the contact detection mechanism, the contact detection mechanism detects the air tightness of the lithium battery shell to be inspected on the one hand; on the other hand, the lithium battery shell to be inspected is subjected to ultrasonic flaw detection, thereby realizing the operation of detecting subtle defects of the lithium battery shell to be inspected;

[0052] S3, lithium battery shell collection, after completing step S2, the lithium battery shell to be inspected that has completed the inspection is transported to the rear end face of the conveying mechanism through the belt conveyor, and the assembly set is driven to rotate through the flip mechanism during the transportation process, and the axis of the assembly set is parallel to the upper end face of the carrying frame, and when it is transported to the rear end face of the carrying frame and is parallel to the upper end face of the carrying frame, the telescopic push rod in the assembly set is driven to extend, so that the assembled lithium battery shell to be inspected is pushed out of the assembly set, and then the lithium battery shells to be inspected are classified and processed through subsequent collection equipment according to the inspection results in step S2.

[0053] In this embodiment, in the S2 step, when the contact detection mechanism performs secondary detection, the gas input into the lithium battery casing to be detected in the airtightness test is high-pressure air, an inert gas including but not limited to carbon dioxide, argon, or a mixed gas between high-pressure air and inert gas.

[0054] The present invention has good structural versatility, high system integration, automation and modularity, and realizes non-contact detection, airtightness detection and ultrasonic detection through machine vision, thereby effectively improving the flexibility, versatility, work efficiency and accuracy of lithium battery shell quality detection operations, and effectively simplifying the equipment structure and reducing the difficulty of operation; at the same time, it also effectively reduces the difficulty and cost of equipment operation and maintenance; in addition, the structure of the equipment can be effectively and flexibly adjusted according to the needs of use, and the needs of different detection operations can be met. At the same time, the equipment parts can be quickly adjusted and replaced, thereby improving the flexibility of equipment use and the ability to operate continuously.

[0055] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cylindrical lithium battery shell surface quality detection device, characterized in that: The surface quality detection device for the cylindrical lithium battery shell includes a bearing frame, a conveying mechanism, an assembly frame, a non-contact detection mechanism, a contact detection mechanism and a drive circuit. The bearing frame is a frame structure with a rectangular axial cross-section. There is at least one non-contact detection mechanism and at least one contact detection mechanism. They are respectively connected to the upper end surface of the bearing frame through the assembly frame and are located directly above the conveying mechanism. The axes of the non-contact detection mechanism and the contact detection mechanism are both perpendicular to the axis of the conveying mechanism and the upper end surface of the bearing frame. The conveying mechanism is embedded in the upper end surface of the bearing frame, and its axis is parallel to the upper end surface of the bearing frame. It includes a belt conveyor, a bearing seat, a fitting sleeve, a flipping mechanism, a turntable mechanism, a bearing pad and a telescopic push rod. Among them, the belt conveyor is embedded in the upper end surface of the bearing frame and is parallel to the upper end surface of the bearing frame. At the same time, both ends of the belt conveyor extend at least 10 cm beyond both ends of the bearing frame. There are several bearing seats, all of which are connected to the belt conveyor and are evenly distributed along the axis direction of the belt conveyor. The bearing seat is a "U"-shaped groove structure. Each bearing seat is provided with a fitting sleeve. The fitting sleeve is a hollow cylindrical structure. The lower half of the fitting sleeve is embedded in the groove body of the bearing seat and is hinged to the side wall of the bearing seat through the flipping mechanism. The bearing pad is embedded in the rear half of the fitting sleeve, is coaxially distributed with the fitting sleeve and is slidably connected to the inner side surface of the fitting sleeve. The rear end surface of the bearing pad is connected to the front end surface of the telescopic push rod through the turntable mechanism. The telescopic push rod is embedded in the rear half of the fitting sleeve and is coaxially distributed with the fitting sleeve. At the same time, the rear end surface of the telescopic push rod is connected to the bottom of the fitting sleeve. The belt conveyor, the flipping mechanism, the turntable mechanism and the telescopic push rod are all electrically connected to the drive circuit. The drive circuit is connected to the outer side surface of the bearing frame and is also electrically connected to the assembly frame, the non-contact detection mechanism and the contact detection mechanism.

2. A cylindrical lithium battery casing surface quality detection device according to claim 1, characterized in that: The fitting sleeve rotates within the range of 0° - 180° through the flipping mechanism. When the rotation angle is 0° and 180°, the axis of the fitting sleeve is parallel to the upper end surface of the belt conveyor. When the rotation angle is 90°, the axis of the fitting sleeve is perpendicular to the upper end surface of the belt conveyor. At least three spring-type universal balls are evenly distributed around the axis on the inner side surface of the fitting sleeve.

3. A cylindrical lithium battery shell surface quality detection device according to claim 1, characterized in that: The assembly frame includes a horizontal driving guide rail, a load-bearing column, a positioning cross arm, a lifting drive mechanism and a sliding block, wherein there are two load-bearing columns, which are symmetrically distributed on both sides of the axis of the conveying mechanism. At the same time, each load-bearing column is vertically distributed with the upper end surface of the load-bearing frame, and is slidably connected with the upper end surface of the load-bearing frame through the horizontal driving guide rail, and the horizontal driving guide rail is parallel to the axis of the conveying mechanism. The positioning cross arm is located between the two load-bearing columns, and its two ends are respectively slidably connected with the load-bearing columns through the lifting drive mechanism, and the axis of the positioning cross arm is vertically distributed with the axis of the load-bearing column. The lifting drive mechanism is connected to the side surface of the load-bearing column and is parallel to the axis of the load-bearing column. The lower end surface of the positioning cross arm is also provided with at least one horizontal driving guide rail parallel to its axis. There are a number of sliding blocks, which are slidably connected with the load-bearing column and the load-bearing cross arm through the lifting drive mechanism, the horizontal driving guide rail, and the lifting drive mechanism are electrically connected to the driving circuit.

4. A cylindrical lithium battery casing surface quality detection device according to claim 1, characterized in that: The non-contact detection mechanism includes a bearing shell, a main control box, a main control circuit, a CCD camera, a fill light, a three-dimensional laser scanner, a serial communication circuit, a serial communication port, and a turntable mechanism. The bearing shell and the main control box are both closed cavity structures with a rectangular cross-section. The main control circuit is located in the main control box and is connected to the outer side of the assembly frame through the main control box. The bearing shell is respectively connected to the bearing columns of the assembly frame and the sliders provided by the positioning crossarms, and the rear end surface of the bearing shell connected to the slider is hinged to the front end surface of the slider through a turntable mechanism. At the same time, a CCD camera and at least two fill lights evenly distributed around the axis of the CCD camera are provided on the front end surface of the bearing shell. The outer side surface of the bearing shell is connected to at least one three-dimensional laser scanner through a turntable mechanism. The optical axis of the instrument intersects with the optical axis of the CCD camera, and the intersection is located 0-10 cm above the axis of the conveying mechanism. Serial communication circuits are provided in the carrying shell and the main control box, and at least one serial communication port is provided on the side surface thereof, wherein the serial communication circuits in the carrying shell are electrically connected to the CCD camera, fill light, three-dimensional laser scanner, turntable mechanism and serial communication port arranged in the carrying shell, respectively, and the serial communication circuits in the main control box are electrically connected to the main control circuit and the serial communication port, respectively, and at the same time, the serial communication ports of each carrying shell are electrically connected to the serial communication ports at the main control box through wires, and are electrically connected to the main control circuit thereby, and at the same time, the main control circuit is electrically connected to the driving circuit through the serial communication circuit and the serial communication port arranged in the main control box.

5. A cylindrical lithium battery casing surface quality detection device according to claim 1, characterized in that: The contact detection mechanism includes a protective wall, a lifting adjustment column, a position sensor, a detection column, a pressure sensor, a booster pump, an ultrasonic flaw detector, a control valve, and a flexible diversion tube. The protective wall is a trough-shaped structure with a "冂"-shaped cross-section. It is connected to the load-bearing column of the assembly frame through a slider and covers the upper end face of the conveying mechanism. At the same time, the axis of the protective wall is parallel to the axis of the conveying mechanism. An adjustment groove parallel to the axis of the conveying mechanism is provided at the top of the protective wall. There are at least two lifting adjustment columns. Each lifting adjustment column is embedded in the adjustment groove and evenly distributed along the axis of the conveying mechanism. The lifting adjustment column is connected to the side wall of the adjustment groove. Its axis is perpendicular to and intersects the upper end face of the conveying mechanism, and the intersection point is located on the axis of the conveying mechanism. The lower end face of the lifting adjustment column is connected to the detection column and is coaxially distributed. The detection column is a cylindrical columnar structure. An air guide cavity parallel to its axis is provided inside it. The upper end face of the air guide cavity is connected to the control valve and is connected to the flexible diversion tube through the control valve. The flexible diversion tube is also connected to the booster pump through the control valve. A position sensor coaxially distributed with it is provided at the lower end face of the detection column. At the same time, a pressure sensor is also provided at its lower end face. In addition, at least one detection contact of the ultrasonic flaw detector is provided on the outer side surface of the detection column. The detection contact of the ultrasonic flaw detector is electrically connected to the ultrasonic flaw detector through a flexible wire. The number of booster pumps and ultrasonic flaw detectors is the same as the number of detection columns. Each detection column forms a detection group with a booster pump and an ultrasonic flaw detector. At the same time, each booster pump and ultrasonic flaw detector are connected to the top of the protective wall. The lifting adjustment column, position sensor, pressure sensor, booster pump, ultrasonic flaw detector, and control valve are all electrically connected to the drive circuit.

6. A cylindrical lithium battery casing surface quality detection device according to claim 5, characterized in that: The detection column includes a rigid diversion tube, a rigid column body, an elastic column body, an elastic sealing ring, and an elastic sealing end cover. The rigid column body is a cylindrical structure. An air guide cavity parallel to its axis is provided inside it. The rigid diversion tube is embedded in the air guide cavity and is coaxially distributed with the air guide cavity. The upper end face of the rigid diversion tube is connected to the control valve. The elastic column body is a hollow columnar structure coaxially distributed with the rigid column body, covering the outside of the rigid column body and coaxially distributed with the rigid column body. The upper end face of the elastic column body is flush with the upper end face of the rigid column body, and the length of the elastic column body is not less than 1.2 times the length of the rigid column body. The elastic sealing ring is a ring-shaped structure coaxially distributed with the rigid column body. There are at least three and they cover the outside of the elastic column body. Each elastic sealing ring is evenly distributed along the axis of the elastic column body. The elastic sealing end cover is a trough-shaped structure with a "冂"-shaped axial cross-section, covering the outer side surface of the upper half of the elastic column body and coaxially distributed with the elastic column body. The upper end face of the elastic sealing end cover is located 0 to 30% of the length of the rigid column body below the upper end face of the elastic column body. At least one elastic sealing ring coaxially distributed with it is provided on the bottom and the inner side surface of the groove wall of the elastic sealing end cover. A number of assembly holes are provided on the rigid column body. The position sensor, pressure sensor, and the detection contact of the ultrasonic flaw detector are all connected to the rigid column body through the assembly holes.

7. A cylindrical lithium battery casing surface quality detection device according to claim 5, characterized in that: The lifting and adjusting column is any one of an electric telescopic column, a hydraulic telescopic column, and a pneumatic telescopic column. At the same time, the lifting and adjusting column is connected to the adjusting groove by a connecting mechanism. The connecting mechanism includes a guide rail, a slider, a positioning clamp, a positioning pin, and a three-dimensional displacement platform. There are two guide rails in total, which are embedded in the adjusting groove and symmetrically distributed along the center line of the adjusting groove and connected to the groove wall of the adjusting groove. The two guide rails are distributed parallel to the axis of the conveying mechanism. The number of the sliders is consistent with the number of the lifting and adjusting columns, and the two ends of the sliders are respectively slidably connected to the two guide rails, and each slider is evenly distributed along the axis direction of the adjusting groove. The slider is connected to at least one positioning clamp through the three-dimensional displacement platform, and is connected to a lifting and adjusting column through the empty clamp. The slider is also connected to a positioning pin, and is connected to the groove wall of the adjusting groove through the positioning pin. The three-dimensional displacement platform is electrically connected to the driving circuit.

8. A cylindrical lithium battery casing surface quality detection device according to claim 5, characterized in that: The lower end surface of the protective wall is connected to a plurality of pulleys through a spring telescopic column, and is abutted and slidably connected to the upper end surface of the supporting frame through the pulley. A temperature sensor and a gas sensor are further arranged on the inner side of the protective wall, and both the temperature sensor and the gas sensor are electrically connected to the driving circuit.

9. The method for using the cylindrical lithium battery shell surface quality detection device according to claim 1, characterized in that: The method for using the cylindrical lithium battery shell surface quality detection device comprises the following steps: S1, equipment assembly, first assemble the bearing frame, conveying mechanism, assembly frame, non-contact detection mechanism, contact detection mechanism and driving circuit to obtain the finished product quality detection device, then install and position the quality detection device to the designated working position through the bearing frame, and on the one hand, connect the front end of the conveying mechanism with the external feeding device; on the other hand, connect the rear end of the conveying mechanism with the external collecting device, and finally, electrically connect the driving circuit with the external power supply system and remote monitoring system to complete the system preset; S2, quality inspection operation, first drive the conveying mechanism, assembly frame, non-contact detection mechanism, and contact detection mechanism to operate at the same time, and when each assembly set of the conveying mechanism is located at the front end face position of the conveying mechanism, the assembly set axis is adjusted to be parallel to the upper end face of the conveying mechanism through the flipping mechanism; then the lithium battery shell to be inspected is inserted into the assembly set through the feeding equipment, and the telescopic push rod is contracted at the same time so that the assembly set clamps and positions the lithium battery shell to be inspected, and after the clamping and positioning are completed, it is transported by the belt conveyor, and during the transportation process, the assembly set and the lithium battery shell to be inspected connected to the assembly set are adjusted to be vertically distributed with the upper end face of the carrying frame through the flipping mechanism, and when adjusted to the vertical distribution state After the lithium battery shell to be inspected passes through the non-contact detection mechanism, the non-contact detection mechanism performs video scanning and observation on the lithium battery shell, collects the surface structural parameters of the lithium battery shell to be inspected, and detects and identifies the obvious defects on the surface of the lithium battery shell to be inspected; after the lithium battery shell to be inspected passes through the non-contact detection mechanism, it is then subjected to secondary inspection by the contact detection mechanism. During the secondary inspection by the contact detection mechanism, the contact detection mechanism detects the air tightness of the lithium battery shell to be inspected on the one hand; on the other hand, the lithium battery shell to be inspected is subjected to ultrasonic flaw detection, thereby realizing the operation of detecting subtle defects of the lithium battery shell to be inspected; S3, lithium battery shell collection, after completing step S2, the lithium battery shell to be inspected that has completed the inspection is transported to the rear end face of the conveying mechanism through the belt conveyor, and the assembly set is driven to rotate through the flip mechanism during the transportation process, and the axis of the assembly set is parallel to the upper end face of the carrying frame, and when it is transported to the rear end face of the carrying frame and is parallel to the upper end face of the carrying frame, the telescopic push rod in the assembly set is driven to extend, so that the assembled lithium battery shell to be inspected is pushed out of the assembly set, and then the lithium battery shells to be inspected are classified and processed through subsequent collection equipment according to the inspection results in step S2.

10. The method for using the cylindrical lithium battery shell surface quality detection device according to claim 9, characterized in that: In the step S2, when the contact detection mechanism performs secondary detection, the gas input into the lithium battery casing to be detected in the airtightness detection is high-pressure air, an inert gas including but not limited to carbon dioxide, argon, or a mixed gas between high-pressure air and inert gas.

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