An automatic appearance detection device for battery steel shell

Abstract

The application discloses a kind of high-efficiency, non-injury battery steel shell appearance automatic detection device, outer wall detection mechanism includes multi-path conductive slip ring, rotating center shaft, guide rod mechanism;The rotor of multi-path conductive slip ring is fixedly installed at the top of rotating center shaft, rotating center shaft is rotationally connected with platform, and the stator of multi-path conductive slip ring is fixedly connected with platform;Guide rod mechanism has multiple groups, and each group of guide rod mechanism has single-path conductive slip ring, rotating shaft, electromagnet, single-path conductive slip ring is communicated with rotor single line, rotating shaft is rotationally connected at the bottom of single-path conductive slip ring, and electromagnet is fixedly connected at the bottom of rotating shaft;Outer wall detection mechanism further includes outer wall detection camera being set at the outside of battery steel shell rotating path, transmission belt, and transmission belt is frictionally contacted with rotating shaft.The battery steel shell is in relative static state when detecting battery steel shell, and efficient non-injury detection is realized.

Description

Technical Field

[0001] This invention relates to testing equipment in battery production, and more specifically, to an efficient, non-destructive automatic inspection device for the appearance of battery steel casings. Background Technology

[0002] The steel casing is the storage container for the battery's active materials and a core component of the battery. Defects in the steel casing can lead to leakage of the active materials, severely affecting the battery's discharge performance. Common steel casing defects include pinholes, as well as appearance defects such as cracks at the top, wrinkles at the opening, and scratches caused by the stamping process during production. Although the probability of steel casing appearance quality problems is extremely low, the handling costs, battery quality risks, and market risks associated with them are enormous. However, effectively controlling quality issues such as pinholes, cracks at the opening, and cracks at the top of the steel casing is a very difficult task for companies.

[0003] Traditional appearance quality inspection relies on manual visual inspection. Due to the large volume of inspections, manual visual inspection cannot completely and effectively detect all defects. Currently, existing technologies in the industry employ automated steel shell appearance inspection devices to improve the accuracy of inspections. For example, Chinese patent document (CN115971068A) discloses a device for detecting defects on the cylindrical surface of battery steel shells. This device includes a main turntable, the sidewall of which can adsorb the battery steel shell. The inspection device includes at least one vision inspection mechanism. During inspection, the steel shell enters the arc-shaped groove of the main turntable and moves counterclockwise with the main turntable. The line scan camera lens and light source of the vision inspection mechanism move counterclockwise along with the steel shell on the main turntable. During the movement, the cylinder in the rotating mechanism that positions the steel shell vertically presses the steel shell vertically through the pressure head. Then, the servo motor in the rotating mechanism drives the steel shell to rotate one revolution through the pressure head and support base. The high-speed line scan camera scans and inspects the entire circumferential surface of the steel shell. Although this technical solution can perform visual inspection of the outer wall of the steel shell, the steel shell is prone to scratches on its outer surface due to its rotation within the arc groove during the inspection process. Furthermore, the pressure heads of the upper and lower positioning cylinders simultaneously press the steel shell, which can easily cause deformation or end scratches. Therefore, this surface defect detection device cannot achieve non-destructive inspection of the battery steel shell. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and provides an efficient and non-destructive automatic inspection device for the appearance of battery steel casings, which is expected to reduce the problem of further defects in the appearance of battery steel casings during the inspection process and achieve non-destructive inspection.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An efficient and non-destructive automatic inspection device for the appearance of battery steel shells includes an upper and lower inspection mechanism and an outer wall inspection mechanism mounted on the upper part of a platform. The outer wall inspection mechanism includes a multi-channel conductive slip ring, a rotating central shaft, and a guide rod mechanism. The rotor of the multi-channel conductive slip ring is fixedly mounted on the top of the rotating central shaft, which is rotatably connected to the platform. The stator of the multi-channel conductive slip ring is fixedly connected to the platform. The guide rod mechanism has multiple sets, each set having a single-channel conductive slip ring, a rotating shaft, and an electromagnet. The single-channel conductive slip ring is connected to the rotor via a single line, the rotating shaft is rotatably connected to the bottom of the single-channel conductive slip ring, and the electromagnet is fixedly connected to the bottom of the rotating shaft. The outer wall inspection mechanism also includes an outer wall inspection camera and a transmission belt mounted outside the rotation path of the battery steel shell, with the transmission belt in frictional contact with the rotating shaft.

[0007] Optionally, the guide rod mechanism further includes a mounting base and a splined shaft. The upper end of the splined shaft is fixedly connected to the bottom end of the mounting base, and a single-path conductive slip ring is fixedly connected to the lower end of the splined shaft. The mounting bases of multiple sets of guide rod mechanisms are evenly fixedly installed on the outer edge of the rotor.

[0008] Optional: The automatic detection device further includes a defective product channel and a qualified product channel. The defective product channel and the qualified product channel are tubular channels, which are installed at an incline on the platform. The inlet end of the defective product channel and the qualified product channel is located at the lower part of the battery steel shell rotation path of the outer wall detection mechanism.

[0009] Optionally: The transmission belt is driven by a drive wheel and a driven wheel, which are rotatably connected to the platform via a rotating shaft. The bottom of the rotating shaft of the drive wheel is connected to the output end of the servo motor. The working end of the external wall detection camera is located between the transmission belt and the platform.

[0010] Optional: The upper and lower detection mechanism includes a detection dial, upper and lower detection cameras connected to the edge computing workstation via signal, and a light source. The detection dial includes a rotating shaft and a locking plate. The lower end of the rotating shaft is rotatably connected to the platform. The locking plate is fixedly installed on the top of the rotating shaft. Multiple semi-circular limiting slots are vertically and evenly provided on the outer edge of the locking plate. Magnets are installed inside the locking plate or at the bottom of the limiting slots. The working ends of the upper and lower detection cameras correspond to the upper and lower ends of the limiting slots.

[0011] Optionally: The detection dial further includes a material-picking fork, which is disposed on the discharge end side of the receiving disc. Optionally: The material-picking fork has an upper fork, a lower fork, and an arc-shaped guide surface, and the edge of the receiving disc is embedded between the upper fork and the lower fork.

[0012] Optional: The multi-channel conductive slip ring is a 24-channel conductive slip ring, and the stator is fixedly connected to the platform through a support frame.

[0013] Optional: The detection device also includes a storage bin, a material conveyor belt, a sorting device, and a transfer dial; the storage bin is located above the feed end of the material conveyor belt, the feed end of the sorting device is located below the discharge end of the material conveyor belt, and the automatic appearance detection device is connected to the discharge end of the sorting device; the transfer dial has the same structure as the detection dial, and the transfer dial is rotatably mounted on the platform, located between the sorting device and the detection dial.

[0014] Optionally: A servo motor is provided at the lower end of the platform, and a transmission gear is installed at the output end of the servo motor. The lower ends of the rotating shaft of the transfer dial, the rotating shaft of the snap-fit ​​dial, and the rotating center shaft are all equipped with transmission gears, which mesh in sequence.

[0015] Optional: The upper and lower detection cameras and the outer wall detection camera communicate with the edge computing workstation via gigabit industrial Ethernet to acquire images; the edge computing workstation, the multi-channel conductive slip rings, and the PLC automatic control system communicate via Ethernet; the edge computing workstation is equipped with an AI large model that can process and reason about the captured data; the PLC automatic control system de-energizes the single-channel conductive slip rings at the defective or qualified product channel based on the reasoning results of the edge computing workstation, thereby simultaneously controlling several single-channel conductive slip rings to distinguish and reject defective or qualified products.

[0016] Optional: The material conveyor belt is a magnetic conveyor belt. The steel shell sorting device includes a support, feeding rods, and a drive motor. There are two feeding rods, which are rotatably mounted on the support in parallel. There is a conveying gap between the two feeding rods that matches the outer diameter of the battery steel shell. The drive motor is fixedly mounted on the support. The output shaft of the drive motor is connected to one of the feeding rods through a transmission belt. The two feeding rods are meshed by gears. The steel shell sorting device is inclined. The upper part of the feeding end of the steel shell sorting device also has a material trough, which is fixedly mounted on the support. A return channel is also provided between the material trough and the storage bin. One end of the return channel is connected to the side of the material trough near the discharge end of the sorting device, and the other end is located at the top of the storage bin.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention uses a card plate plus an electromagnet for detection. The battery steel shell rotates under magnetic attraction, so that the battery steel shell is always in a relatively static state to complete the appearance quality inspection. This effectively avoids quality defects caused by secondary damage to the battery steel shell during the inspection process, and realizes non-destructive testing. The accuracy of this testing equipment reaches more than 99%, which solves the quality risk and market risk caused by battery appearance defects, and also solves the pain point of the difficulty of non-destructive testing of the entire battery appearance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the detection device of the upper and lower detection mechanism of the present invention;

[0020] Figure 3 This is a schematic diagram of the outer wall detection mechanism of the present invention;

[0021] Figure 4 This is a top view schematic diagram of the appearance inspection structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the guide rod mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of the sorting device of the present invention;

[0024] Figure 7 This is a schematic diagram showing the connection between the material conveyor belt and the sorting device of the present invention;

[0025] The components in the diagram are numbered as follows: 1. Storage bin; 2. Material conveyor belt; 3. Sorting device; 301. Support; 302. Feeding rod; 303. Drive motor; 304. Material trough; 4. Upper and lower detection mechanisms; 401. Rotating shaft; 402. Card plate; 403. Limiting slot; 405. Upper and lower detection cameras; 5. Outer wall detection mechanism; 501. Twenty-four conductive slip rings; 5011. Rotor; 5012. Stator; 502. Rotating center shaft; 503. Guide rod mechanism; 5031. Mounting base; 5032. Splined shaft; 5033. Single-channel conductive slip ring; 5034. Rotating shaft; 5035. Electromagnet; 504. Outer wall detection camera; 505. Transmission belt; 6. Platform; 7. Transfer dial; 8. Defective product channel; 9. Qualified product channel; 10. Servo motor; 11. Return channel. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] like Figure 1 As shown: A high-efficiency, non-destructive automatic inspection device for the appearance of battery steel shells includes an upper and lower inspection mechanism 4 and an outer wall inspection mechanism 5; the upper and lower inspection mechanism 4 and the outer wall inspection mechanism 5 are set on a platform 6; the upper and lower inspection mechanism 4 is used to detect appearance defects at the opening and head of the battery steel shell, and the outer wall inspection mechanism 5 is used to detect appearance defects on the side wall of the battery steel shell.

[0028] like Figure 2As shown, the upper and lower detection mechanism 4 includes a detection dial, which includes a rotating shaft 401, a retaining plate 402, and a material picking fork 404. The lower end of the rotating shaft 401 is rotatably connected to the platform 6. The retaining plate 402 is fixedly installed on the top of the rotating shaft 401. Multiple semi-circular limiting slots 403 are vertically and evenly arranged on the outer edge of the retaining plate 402. The diameter of the limiting slots 403 is adapted to the outer diameter of the battery steel shell. Magnets are installed inside the retaining plate 402 or at the bottom of the slots of the limiting slots 403, so that the limiting slots 403 have a magnetic attraction function. The retaining plate 402 is driven to rotate by the rotating shaft 401. The receiving plate 402 is divided into a feeding end and a discharging end according to its rotation direction. The picking fork 404 is set on one side of the discharging end. The lower end of the picking fork 404 is fixedly installed on the platform 6. The picking fork 404 has an upper fork and a lower fork. The edge of the receiving plate 402 is embedded between the upper fork and the lower fork. The upper and lower detection mechanism 4 also includes upper and lower detection cameras 405 and a light source. The upper and lower detection cameras 405 are set on the platform 6 through support rods. The upper and lower detection cameras 405 communicate with the edge computing workstation through gigabit industrial Ethernet. There are two sets of upper and lower detection cameras 405, which correspond to the upper and lower positions of the limiting slot 403. During testing, the battery casings are effectively sorted vertically by the casing sorting device 3. The side of the receiving plate 402 closest to the sorting device 3 is the inlet, and the side closest to the picking fork 404 is the outlet. After being transferred, the battery casings reach the inlet of the receiving plate 402. The receiving plate 402 rotates, attracting the battery casings from the inlet into the limiting slot 403. The casings then rotate towards the outlet. When the battery casings reach the upper and lower detection cameras 405, the cameras capture images of the opening and top of the casings. The captured data is transmitted to the edge computing workstation. The workstation uses a trained AI model to infer and judge the captured data. If the result is a defective product, the inference and judgment result is transmitted to the PLC automatic control system. The PLC automatic control system marks the defective product in the program, and the subsequent program removes it. After the upper and lower appearance inspections are completed, the battery steel shell continues to rotate towards the discharge end. When it reaches the discharge end, the upper and lower ends of the battery steel shell contact the upper and lower forks of the picking fork 404, respectively. The arc-shaped guide surface of the picking fork 404 pushes the battery steel shell out of the limiting slot 403, and the subsequent outer wall inspection mechanism 5 performs subsequent inspections.

[0029] like Figure 1 , Figure 2 , Figure 4 , Figure 5As shown: The outer wall detection mechanism 5 is located on one side of the discharge end of the upper and lower detection mechanisms 4. The outer wall detection mechanism 5 includes a 24-way conductive slip ring 501, a rotating central shaft 502, and a guide rod mechanism 503. The rotor 5011 of the 24-way conductive slip ring 501 is fixedly installed on the top of the rotating central shaft 502, and the rotor 5011 is driven to rotate by the rotating central shaft 502. The stator 5012 of the 24-way conductive slip ring 501 is fixedly connected to the platform 6 through a support frame. The 24-way conductive slip ring 501 communicates with the PLC automatic control system via Ethernet, thereby ensuring the two The circuit opening and closing and signal control of the fourteen-channel conductive slip ring 501; the guide rod mechanism 503 has twenty-four groups, including a mounting base 5031, a spline shaft 5032, a single-channel conductive slip ring 5033, a rotating shaft 5034, and an electromagnet 5035. The upper end of the spline shaft 5032 is fixedly connected to the bottom end of the mounting base 5031, the single-channel conductive slip ring 5033 is fixedly connected to the lower end of the spline shaft 5032, the rotating shaft 5034 is rotatably connected to the bottom of the single-channel conductive slip ring 5033, and the electromagnet 5035 is fixedly installed on the bottom of the rotating shaft 5034 by fixing screws. The component consists of twenty-four mounting bases 5031 evenly fixed on the outer edge of the rotor 5011. Twenty-four sets of single-path conductive slip rings 5033 are connected to the rotor 5011 via single-path connections, thereby enabling the single-path conductive slip ring 5033 to control the circuit opening and closing of the corresponding electromagnet 5035. The steel shell outer wall detection mechanism 5 also includes an outer wall detection camera 504 and a transmission belt 505. The outer wall detection camera 504 and transmission belt 505 are positioned outside the rotation path of the battery steel shell. The transmission belt 505 is driven by a driving wheel and a driven wheel. The driven wheel and the driven wheel are rotatably connected to the platform 6 via a rotating shaft. The bottom of the rotating shaft of the driving wheel is connected to the output end of the servo motor. The transmission belt 505 is in contact with the rotating shaft 5034. The speed difference between the movement speed of the transmission belt 505 and the movement speed of the rotating center shaft 502 drives the rotating shaft 5034 to rotate. The working end of the outer wall detection camera 504 is located between the transmission belt 505 and the platform 6, thereby ensuring that the outer wall detection camera 504 can effectively capture images of the outer wall of the battery steel shell. The outer wall detection camera 504 communicates with the edge computing workstation via gigabit industrial Ethernet.

[0030] After the upper and lower appearance inspections of the battery steel shells by the four upper and lower inspection mechanisms are completed, the battery steel shells are pulled out from the limit slots 403 by the material picking fork. At the same time, the rotating central shaft 502 drives the rotor 5011 of the twenty-four-way conductive slip rings 501 to rotate. The single-way conductive slip rings 5033 are energized and the electromagnets 5035 are magnetically activated. As the battery steel shells are pulled out, the lower end of each electromagnet 5035 magnetically attracts the top of the battery steel shell. After the electromagnets 5035 attract the battery steel shells, the rotating central shaft 502 drives the electromagnets and battery steel shells to move towards the outer wall inspection camera 504. When the battery steel shells move to the transmission belt 505, they interact with the transmission... The transmission belt 505 makes friction contact (the servo motor drives the shaft of the drive wheel to rotate, causing the transmission belt 505 to rotate). The transmission belt 505 rubs against the rotating shaft 5034, causing it to rotate. The battery steel shell rotates along with the rotating shaft 5034. At the same time as the battery steel shell rotates, the outer wall detection camera 504 takes pictures of the outer wall of the battery steel shell. The captured data is transmitted to the edge computing workstation. The edge computing workstation uses a trained AI large model to infer the captured data. If the result is a defective product, the inference result is transmitted to the PLC automatic control system. The PLC automatic control system marks the defective product in the program, and the subsequent program removes it.

[0031] The detection device also includes a defective product channel 8 and a qualified product channel 9. These channels are tubular and are installed at an angle on the platform 6. The inlet ends of the defective and qualified product channels 8 and 9 are located at the lower part of the rotation path of the battery steel shells in the outer wall detection mechanism 5. The defective product channel 8 is located between the qualified product channel 9 and the outer wall detection camera 504. When a defective product marked by the edge computing workstation rotates to the defective product channel 8, the PLC automatic control system controls the corresponding single-channel conductive slip ring 5033 circuit to close, causing the electromagnet 5035 to demagnetize. The corresponding defective battery steel shell detaches from the electromagnet 5035 and falls into the defective product channel 8. When the remaining qualified battery steel shells move to the upper part of the qualified product channel 9, the PLC automatic control system sequentially controls the corresponding single-channel conductive slip ring 5033 circuit to close, and the battery steel shells fall into the qualified product channel 9 sequentially.

[0032] A servo motor 10 is installed at the lower end of the platform 6. A transmission gear is installed at the output end of the servo motor 10. Transmission gears are also installed at the lower ends of the rotating shaft of the transfer dial 7, the rotating shaft 401 of the clamping plate 402, and the rotating center shaft 502. These gears mesh in sequence, that is, the transmission gear of the transfer dial 7 meshes with the transmission gear of the servo motor 10 and the transmission gear of the clamping plate 402, respectively, and the transmission gear of the rotating center shaft 502 meshes with the transmission gear of the clamping plate 402. The rotation speed ratio of the rotor 5011 of the transfer dial 7, the clamping plate 402, and the twenty-four conductive slip rings is controlled by the meshing of multiple gears, thereby controlling the sequential transmission of the battery steel shell and realizing the appearance quality inspection.

[0033] To ensure efficient and non-destructive automatic inspection of battery casing appearance, a storage bin 1, a material conveyor belt 2, and a sorting device 3 are installed at the front end of the automatic appearance inspection device; for example... Figure 1 As shown, the storage bin 1 is located above the inlet end of the material conveyor belt 2, and the inlet end of the sorting device 3 is located below the outlet end of the material conveyor belt 2. The automatic appearance inspection device is connected to the outlet end of the sorting device 3. The storage bin 1 is used to store battery steel shells and discharge them onto the material conveyor belt 2. The material conveyor belt 2 transports the battery steel shells to the sorting device 3. The sorting device 3 sorts the battery steel shells and then transfers them to the automatic appearance inspection device. The automatic appearance inspection device performs appearance quality inspection on the opening, head, and sidewalls of the battery steel shells and rejects unqualified products.

[0034] The material conveyor belt 2 is a magnetic conveyor belt. Magnets are installed on the mounting frame of the material conveyor belt 2 between the inlet end and the outlet end. When the battery steel shell in the storage bin 1 falls onto the material conveyor belt 2, the battery steel shell is magnetically attracted to the surface of the material conveyor belt 2 by the magnet. After reaching the outlet end, it is released from the magnetic attraction and falls into the steel shell sorting device 3.

[0035] like Figure 7 As shown: The steel shell sorting device 3 includes a bracket 301, feeding rods 302, and a drive motor 303. There are two feeding rods 302, which are rotatably mounted parallel to each other on the bracket 301. A conveying gap matching the outer diameter of the battery steel shell is formed between the two feeding rods 302. The drive motor 303 is fixedly mounted on the bracket 301. The output shaft of the drive motor 303 is connected to one of the feeding rods 302 via a transmission belt. The two feeding rods 302 rotate in opposite directions through gear meshing. The steel shell sorting device 3 is inclined, with the higher end being the feeding end. A material trough 304 is located above the feeding end of the steel shell sorting device 3, and the material trough 304 is fixedly mounted on the bracket 301. The opening of the battery steel shell has a flange. The diameter of the flange is larger than the conveying gap between the feeding rods 302. For example, the steel shell cylinder size is 13.65±0.03mm, the flange size at the opening of the steel shell is 14.25±0.03mm, and the optimal distance between the two feeding rods 302 is 14mm. The steel shell flange is suspended on the two feeding rods 302. After the battery steel shell is conveyed to the discharge end by the material conveyor belt 2, it falls into the material trough 304. The drive motor 303 drives the feeding rods 302 to rotate. Due to gravity, the battery steel shell falls into the conveying gap between the feeding rods 302. The flange of the battery steel shell makes the battery steel shell vertical in the conveying gap. Since the steel shell sorting device 3 is set in an inclined state, the battery steel shell slides along the feeding rods 302 towards the discharge end.

[0036] To prevent the battery steel shells from being unable to be effectively sorted when there are too many in the material tank 304, a return channel 11 is provided between the material tank 304 and the storage bin 1. One end of the return channel 11 is connected to the discharge end of the material tank 304 near the sorting device 3, and the other end is located at the top of the storage bin 1. The return channel 11 effectively prevents the battery steel shells in the material tank 304 from blocking the conveying gap.

[0037] The sorting device 3 and the detection dial also have a transfer dial 7. The transfer dial 7 has the same structure as the detection dial, except that the rotation direction of the transfer dial 7 and the receiving dial 402 is different. The discharge end of the transfer dial 7 is in contact with the feed end of the receiving dial 402, and the feed end of the transfer dial 7 is in contact with the discharge end of the sorting device 3. After the sorting device 3 sorts the battery steel shells, the transfer dial 7 transfers the battery steel shells from the sorting device 3 to the feed end of the detection dial.

[0038] By inspecting the opening, head, and cylinder wall of the battery steel shell, a panoramic inspection of the entire battery steel shell's appearance defects is completed. Throughout the entire panoramic inspection process, the battery steel shell remains relatively stationary, thus solving the technical problem of secondary damage to the battery steel shell caused by the inspection process.

[0039] In the battery manufacturing industry, the PPM value is a core indicator for measuring the manufacturing defect rate of batteries. The lower the PPM value, the fewer defective products there are per million batteries, and the higher the production quality. Appearance quality problems such as sand holes, cracks at the top of the battery casing, and wrinkles at the opening of the casing are generally within 1-5 PPM during battery production. The table below shows the statistical table of appearance inspection accuracy after adopting this invention:

[0040] Table 1. Statistics on the accuracy of appearance inspection

[0041]

[0042] The test data above shows that the accuracy of the testing equipment using this invention reaches 99.2%, far exceeding the 60-70% accuracy of traditional testing equipment. At the same time, this technology will not cause secondary damage to the appearance of the battery casing. Compared with traditional testing techniques, which are often accompanied by secondary damage to the appearance of the battery casing, this invention further reduces product quality risks and achieves efficient and non-destructive testing.

[0043] Although the invention has been described herein with reference to illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of this disclosure. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casings, characterized in that: The system includes an upper and lower detection mechanism (4) and an outer wall detection mechanism (5) located on the upper part of the platform (6). The outer wall detection mechanism (5) includes a multi-channel conductive slip ring, a rotating central shaft (502), and a guide rod mechanism (503). The rotor (5011) of the multi-channel conductive slip ring is fixedly installed on the top of the rotating central shaft (502). The rotating central shaft (502) is rotatably connected to the platform (6), and the stator (5012) of the multi-channel conductive slip ring is fixedly connected to the platform (6). The guide rod mechanism (503) has multiple sets. Each set of guide rod mechanism (503) has a single-channel conductive slip ring (5033), a rotating shaft (5034), and an electromagnet (5035). The single-channel conductive slip ring (5033) is connected to the rotor (5011) by a single line, and the rotating shaft (5034) is rotatably connected to the bottom of the single-channel conductive slip ring (5033). The electromagnet (5035) is fixedly connected to the bottom of the rotating shaft (5034); the outer wall detection mechanism (5) also includes an outer wall detection camera (504) and a transmission belt (505) set outside the rotation path of the battery steel shell, and the transmission belt (505) is in frictional contact with the rotating shaft (5034).

2. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 1, characterized in that: The guide rod mechanism (503) also includes a mounting base (5031) and a spline shaft (5032). The upper end of the spline shaft (5032) is fixedly connected to the bottom end of the mounting base (5031), and a single-path conductive slip ring (5033) is fixedly connected to the lower end of the spline shaft (5032). The mounting bases (5031) of multiple sets of guide rod mechanisms (503) are evenly fixedly installed on the outer edge of the rotor (5011).

3. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 2, characterized in that: The automatic detection device also includes a defective product channel (8) and a qualified product channel (9). The defective product channel (8) and the qualified product channel (9) are tubular channels installed at an angle on the platform (6). The inlet end of the defective product channel (8) and the qualified product channel (9) is located at the lower part of the battery steel shell rotation path of the outer wall detection mechanism (5).

4. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 3, characterized in that: The transmission belt (505) is driven by the drive wheel and the driven wheel. The drive wheel and the driven wheel are rotatably connected to the platform (6) through the rotating shaft. The bottom of the rotating shaft of the drive wheel is connected to the output end of the servo motor. The working end of the outer wall detection camera (504) is located between the transmission belt (505) and the platform (6).

5. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 4, characterized in that: The upper and lower detection mechanism (4) includes a detection dial, an upper and lower detection camera (405) connected to the edge computing workstation, and a light source. The detection dial includes a rotating shaft (401) and a locking plate (402). The lower end of the rotating shaft (401) is rotatably connected to the platform (6). The locking plate (402) is fixedly installed on the top of the rotating shaft (401). Multiple semi-circular limiting slots (403) are vertically and evenly provided on the outer edge of the locking plate (402). Magnets are installed in the locking plate (402) or at the bottom of the limiting slots (403). The working end of the upper and lower detection camera (405) corresponds to the upper and lower ends of the limiting slots (403).

6. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 5, characterized in that: The detection dial also includes a material picking fork (404), which is located on the discharge end side of the receiving plate (402).

7. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 6, characterized in that: The multi-channel conductive slip ring is a 24-channel conductive slip ring (501), and the stator (5012) is fixedly connected to the platform (6) through a support frame.

8. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 7, characterized in that: The detection device also includes a storage bin (1), a material conveyor belt (2), a sorting device (3), and a transfer dial (7); the storage bin (1) is located at the upper part of the feeding end of the material conveyor belt (2), the feeding end of the sorting device (3) is located at the lower part of the discharge end of the material conveyor belt (2), and the appearance detection device is connected to the discharge end of the sorting device (3); the transfer dial (7) has the same structure as the detection dial, and the transfer dial (7) is rotatably mounted on the platform (6) and located between the sorting device (3) and the detection dial.

9. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 8, characterized in that: The platform (6) is equipped with a servo motor (10) at its lower end. The output end of the servo motor (10) is equipped with a transmission gear. The lower ends of the rotating shaft of the transfer dial (7), the rotating shaft of the snap-fit ​​dial (402), and the rotating center shaft (502) are all equipped with transmission gears, which mesh in sequence.

10. The high-efficiency, non-destructive automatic inspection device for the appearance of battery steel casing according to claim 7, characterized in that: The upper and lower detection cameras (405) and the outer wall detection camera (504) communicate with the edge computing workstation via gigabit industrial Ethernet to acquire images. The edge computing workstation, the multi-channel conductive slip ring and the PLC automatic control system communicate via Ethernet. The edge computing workstation is equipped with an AI large model that can process and infer the captured data. The PLC automatic control system controls the single-channel conductive slip ring (5033) to cut off power at the defective product channel (8) or the qualified product channel (9) according to the inference results of the edge computing workstation.

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