Lithium battery defect detection equipment based on visual inspection

Abstract

The invention relates to the technical field of lithium battery defect detection, in particular to lithium battery defect detection equipment based on visual detection. Comprising a rack, a rotary table, a visual detection mechanism and an ultrasonic detection mechanism, a plurality of first mounting grooves are formed in the rotary table, and each first mounting groove is provided with a jig; a plurality of second mounting grooves are formed in the rack; a driving disc is arranged at the bottom of the ultrasonic detection mechanism, and a sliding groove is formed in the driving disc; and the internal structures of the lithium batteries with surface defects detected by the visual detection mechanism are rechecked through the ultrasonic detection mechanism, so that fine grading and screening of the lithium batteries are realized. The annular rack is matched with the rotary table and the jig for use, so that efficient transfer and temporary storage of the lithium batteries among detection procedures are realized, and the problem of mismatching of flow connection caused by the fact that the ultrasonic detection speed is far lower than the visual detection speed in the prior art is effectively solved; therefore, the overall detection efficiency and accuracy of the equipment are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery defect detection, and in particular to a lithium battery defect detection device based on visual detection. Background Art

[0002] Lithium batteries are widely used, including daily necessities such as mobile phones, laptops, bicycles, cars and many other electrical equipment, as well as various electrical equipment in various industries such as industry, agriculture, military and medical care. Since battery energy is obtained through the chemical energy conversion process, there are safety hazards such as explosion, so the quality inspection and factory inspection of batteries are very important; many surface defects of lithium batteries are directly related to a large number of internal and external structural defects, which directly cause a large number of safety hazards and reliability problems. Surface defect detection can effectively eliminate a large part of important safety hazards, so surface defect detection is very important and is the link that consumes the most manpower in the entire lithium battery production process.

[0003] Chinese patent announcement number CN109239100B discloses a lithium battery surface detection device, which includes a frame and a control system. A turntable is provided on the frame, and a battery placement area is arranged on the turntable, and the lithium battery is adapted to be placed in a flat manner. There are multiple stations on the frame, and a loading mechanism, a front visual detection mechanism, a flipping mechanism, a back visual detection mechanism, a peripheral visual detection mechanism and a unloading mechanism are arranged in sequence. Through the rotation of the turntable, the lithium battery can pass through each detection station in turn, and under the coordination of the control system, the front, back and surrounding of the lithium battery can be automatically detected. However, the patent solution only relies on visual detection to judge the surface defects of the lithium battery, and does not combine more in-depth detection methods such as ultrasonic detection or X-ray detection, resulting in some internal defects. It is difficult to identify. For example, defects such as internal short circuits, poor welding, and internal contamination may not be directly reflected on the surface of the battery. It is difficult to accurately judge by visual detection alone, and there is a certain risk of misjudgment. In addition, for some lithium batteries with complex structures, this solution may still have detection blind spots and cannot achieve comprehensive coverage of all potential defects.

[0004] In addition, although lithium battery inspection usually includes visual inspection, ultrasonic inspection and X-ray inspection, there are significant differences in the rhythm of these inspection methods. The speed of visual inspection is much higher than other inspection methods such as ultrasonic inspection, which makes it difficult for the overall inspection process to match the work rhythm. When a lithium battery with surface defects is found during the inspection process and needs to be further entered into the ultrasonic inspection station, the equipment may need to stop and wait, and cannot work continuously, thereby reducing the overall production efficiency and affecting the stability and fluency of the inspection system. Summary of the invention

[0005] In view of the above problems, a lithium battery defect detection device based on visual inspection is provided. The present invention uses an ultrasonic inspection mechanism to review the structure of the visual inspection mechanism to achieve fine grading and screening of lithium batteries. By using a ring-shaped rack with a turntable and a fixture, efficient transfer and temporary storage of lithium batteries between various inspection processes are achieved, effectively compensating for the problem of process connection mismatch caused by the ultrasonic inspection speed being much lower than the visual inspection speed in the prior art, thereby greatly improving the overall inspection efficiency and accuracy of the equipment.

[0006] To solve the problems of the prior art, the present invention provides a lithium battery defect detection device based on visual inspection, comprising a frame and a turntable arranged on the frame, the turntable is provided with a plurality of first mounting grooves equidistantly surrounding its axis and extending radially along the turntable, each first mounting groove is slidably provided with a jig for fixing the lithium battery; a visual inspection mechanism is arranged on the side of the turntable; the frame is an annular structure, and a plurality of second mounting grooves matching the first mounting grooves are arranged on the frame; an ultrasonic inspection mechanism is arranged on the frame, a driving disk fixedly connected to the ultrasonic inspection mechanism is arranged at the bottom of the ultrasonic inspection mechanism, the driving disk is rotatably arranged on the axis of the frame, and a slide groove matching the second mounting groove is arranged on the driving disk; when the visual inspection mechanism detects that the lithium battery has a defect, the jig slides along the first mounting groove to the second mounting groove for temporary storage; then, the driving disk of the ultrasonic inspection mechanism rotates to dock the slide groove with the second mounting groove, and the jig temporarily stored is transferred to the ultrasonic inspection position, the inside of the lithium battery is inspected and the visual inspection result is reviewed.

[0007] Preferably, the ultrasonic detection mechanism includes a mounting plate fixedly connected to the driving disk, the mounting plate is provided with a slide rail perpendicular to the extension direction of the slide groove, the slide rail is provided with a slidable driving block, a driver for driving the driving block to reciprocate is provided on the side of the mounting plate away from the slide rail, the driving block is provided with a first detection head for detecting the interior of the lithium battery, and the first detection head is arranged in a vertical state.

[0008] Preferably, a second detection head for detecting the interior of the lithium battery is disposed below the driving disk, and the second detection head is disposed in a horizontal direction.

[0009] Preferably, a plurality of first rollers are arranged horizontally and along the extension direction of the slide groove below the driving disk, a first gear is sleeved on the first roller, a rack meshing with the first gear is arranged at the bottom of the fixture, a first synchronous belt is sleeved on the plurality of first rollers, and one of the first rollers is driven by a first rotary drive motor.

[0010] Preferably, a gear ring fixedly connected to and coaxial with the driving disk is provided at the bottom, a bevel gear meshing with the gear ring and a second rotary drive motor for driving the bevel gear to rotate are provided on the frame, and an angle sensor is provided on the driving disk.

[0011] Preferably, a plurality of second rollers are arranged on the frame below the second mounting groove, a second gear meshingly connected to the rack is sleeved on the second roller, a second synchronous belt is arranged between the plurality of second rollers, and the second rollers are driven by a third rotation drive motor.

[0012] Preferably, the visual inspection mechanism includes a first inspection component sequentially arranged on the circumference of the turntable for performing surface inspection on the front side of the lithium battery, a flipping component for turning over the lithium battery, and a second inspection component for performing surface inspection on the flipped lithium battery.

[0013] Preferably, the visual inspection mechanism further includes a third inspection component for inspecting the peripheral side of the lithium battery.

[0014] Preferably, the first detection component, the second detection component and the third detection component are all provided with a pushing component for pushing the jig on the turntable, and the turntable is also provided with a clamping block driven by an electromagnetic force, and the bottom of the jig is provided with mounting holes that match the clamping blocks.

[0015] Preferably, the jig is provided with anti-slip rubber strips arranged in a rectangular shape.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses an ultrasonic detection mechanism to review the internal structure of lithium batteries with surface defects that have been detected by a visual detection mechanism, and uses a visual detection mechanism to perform high-speed detection on the surface of lithium batteries, which can promptly discover the risk of internal damage that may be caused by external defects of lithium batteries; when a large surface defect is detected, the ultrasonic detection mechanism is used to review the interior of the lithium battery to ensure that the interior of the lithium battery is not damaged, and the surface defects are handled by repair or replacement, and lithium batteries with defects on both the surface and the interior are repaired, so as to achieve fine grading and screening of lithium batteries. The comprehensiveness of equipment detection is improved, multiple manual interventions are avoided, and the detection efficiency of the equipment can be improved.

[0017] 2. The present invention realizes the efficient transfer and temporary storage of lithium batteries between various testing processes by adopting a ring-shaped frame with a turntable and a fixture, effectively compensating for the problem of process connection mismatch caused by the ultrasonic detection speed being much lower than the visual detection speed in the prior art, thereby greatly improving the overall detection efficiency and accuracy of the equipment.

[0018] 3. The present invention realizes multi-angle scanning inside the lithium battery by setting a first detection head (vertical direction) and a second detection head (horizontal direction), thereby improving the detection accuracy of defects and reducing the possibility of missed detection. The double-sided detection method is adopted to enable the ultrasonic signal to effectively penetrate the lithium battery and accurately obtain the signal change through the receiving end. Compared with the single-sided detection method, it can more stably identify the material defects, bubbles or interlayer separation inside the lithium battery. Without the need to flip the lithium battery additionally, the internal structure detection of the lithium battery can be completed quickly, thereby improving the detection efficiency and meeting the needs of high-speed automated production lines. It is suitable for the detection of lithium batteries of different sizes and can adapt to lithium battery products of various specifications, thereby improving the scope of application of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of a lithium battery defect detection device based on visual inspection.

[0020] Figure 2 It is a top view of a lithium battery defect detection device based on visual inspection.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of a rack, a turntable and an ultrasonic detection mechanism in a lithium battery defect detection device based on visual detection.

[0022] Figure 4 This is a three-dimensional structural diagram of the ultrasonic detection mechanism and rack in a lithium battery defect detection device based on visual detection. Figure 1 .

[0023] Figure 5 This is a three-dimensional structural diagram of the ultrasonic detection mechanism and rack in a lithium battery defect detection device based on visual detection. Figure 2 .

[0024] Figure 6 This is a three-dimensional structural diagram of the ultrasonic detection mechanism and rack in a lithium battery defect detection device based on visual detection. Figure 3 .

[0025] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0026] Figure 8 This is a three-dimensional structural diagram of the ultrasonic detection mechanism in a lithium battery defect detection device based on visual detection. Figure 1 .

[0027] Fig. 9 This is a three-dimensional structural diagram of the ultrasonic detection mechanism in a lithium battery defect detection device based on visual detection. Figure 2 .

[0028] Fig.10 It is a three-dimensional structural schematic diagram of a fixture in a lithium battery defect detection device based on visual inspection.

[0029] Fig.11 It is a three-dimensional structural schematic diagram of a visual inspection mechanism in a lithium battery defect inspection device based on visual inspection.

[0030] Fig.12 It is a schematic diagram of the three-dimensional structure of a turntable in a lithium battery defect detection device based on visual inspection.

[0031] The numbers in the figure are: 1. Turntable; 11. Visual inspection mechanism; 111. First inspection component; 112. Second inspection component; 113. Flipping component; 114. Third inspection component; 115. Pushing component; 116. Block; 12. First mounting slot; 13. Jig; 131. Rack; 132. Mounting hole; 133. Anti-slip rubber strip; 2. Frame; 21. Second mounting slot; 22. Bevel gear; 221. Second rotary drive motor; 23. Second roller; 231. Second gear; 232. Second synchronous belt; 24. Third rotary drive motor; 3. Ultrasonic detection mechanism; 31. Drive disk; 311. Slide groove; 312. First roller; 3121. First gear; 3122. First synchronous belt; 313. First rotary drive motor; 314. Ring gear; 315. Angle sensor; 32. Mounting plate; 321. Slide rail; 322. Drive block; 3221. First detection head; 323. Driver; 324. Second detection head; 4. Lithium battery. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figures 1 to 4 , Figure 8 and Fig.12As shown: A lithium battery defect detection device based on visual inspection comprises a frame 2 and a turntable 1 arranged on the frame 2, the turntable 1 is provided with a plurality of first mounting grooves 12 equidistantly surrounding its axis and extending radially along the turntable 1, each first mounting groove 12 is slidably provided with a fixture 13 for fixing a lithium battery 4; a visual inspection mechanism 11 is arranged on the side of the turntable 1; the frame 2 is an annular structure, and a plurality of second mounting grooves 21 matching the first mounting grooves 12 are arranged on the frame 2; an ultrasonic detection mechanism 3 is arranged on the frame 2, and a bottom of the ultrasonic detection mechanism 3 is provided A driving disk 31 is fixedly connected to it, and the driving disk 31 is rotatably arranged on the axis of the frame 2, and a slide groove 311 matching the second mounting groove 21 is arranged on the driving disk 31; when the visual inspection mechanism 11 detects that the lithium battery 4 has defects, the fixture 13 slides along the first mounting groove 12 to the second mounting groove 21 for temporary storage; then, the driving disk 31 of the ultrasonic inspection mechanism 3 rotates to make the slide groove 311 dock with the second mounting groove 21, and transfers the temporarily stored in the fixture 13 to the ultrasonic inspection position, so as to inspect the inside of the lithium battery 4 and review the visual inspection results.

[0034] A loading mechanism (not shown in the figure), a visual inspection mechanism 11 and a unloading mechanism (not shown in the figure) are sequentially arranged on the circumference of the turntable 1. The loading mechanism and the unloading mechanism can be realized by a robot or a conveyor belt.

[0035] In order to ensure the positioning accuracy, a fixture 13 for placing the lithium battery 4 is provided on the turntable 1 .

[0036] First, the loading mechanism places the lithium battery 4 on the fixture 13 of the turntable 1, and the turntable 1 drives the fixture 13 to rotate around the annular frame 2. The lithium battery 4 on the fixture 13 passes through the visual inspection mechanism 11 and the unloading mechanism in turn, and the defects on the surface of the lithium battery 4 are detected by the high-speed camera and image processing technology of the visual inspection mechanism 11. The purpose of surface defect detection is to prevent the internal structure of the lithium battery 4 from being damaged. If the surface of the lithium battery 4 has defects, it is necessary to further detect the inside of the lithium battery 4 to detect whether the internal structure is damaged due to the surface defects.

[0037] When the visual inspection mechanism 11 detects that there are large defects on the surface of the lithium battery 4, the first mounting groove 12 on the turntable 1 will dock with the second mounting groove 21, and the fixture 13 slides along the first mounting groove 12 to the second mounting groove 21 to achieve temporary storage of the lithium battery 4.

[0038] Thereafter, the driving disk 31 of the ultrasonic detection mechanism 3 rotates so that its slide slot 311 can dock with the second mounting slot 21 on the frame 2, so that the lithium battery 4 temporarily stored on the fixture 13 can be moved to the driving disk 31. The ultrasonic detection mechanism 3 will detect the inside of the lithium battery 4 to confirm whether the internal structure of the lithium battery 4 is intact, thereby reviewing the lithium battery 4 with surface defects found during the visual inspection process to ensure that the internal structure of the lithium battery 4 is not damaged.

[0039] After the detection is completed, the ultrasonic detection mechanism 3 rotates so that the slide groove 311 on the driving disk 31 will dock with the second mounting groove 21 on the turntable 1 located next to the unloading mechanism, so that the fixture 13 can slide along the slide groove 311 to the second mounting groove 21 of the frame 2, and then slide along the second mounting groove 21 of the frame 2 to the first mounting groove 12 of the turntable 1, and unload the lithium battery 4 on the turntable 1 through the unloading mechanism, thereby completing the entire detection process.

[0040] It should be noted that the lithium battery 4 will have three states after detection, namely, a qualified lithium battery 4, a lithium battery 4 with surface defects, and a lithium battery 4 with both surface and interior damaged. For this reason, three unloading positions are provided on the turntable 1, and an independent unloading mechanism is provided next to each unloading position, which is used to classify and unload the qualified lithium batteries 4, the lithium batteries 4 with only surface defects, and the lithium batteries 4 with both surface and interior damaged, so as to facilitate the subsequent further processing of the lithium batteries 4 in different states.

[0041] In order to ensure that the turntable 1 is always in working condition, a spare jig 13 is provided on the frame 2. When the visual inspection mechanism 11 detects defects on the surface of the lithium battery 4, the corresponding jig 13 will be moved to the ultrasonic inspection mechanism 3 for further inspection. At this time, the jig 13 will be missing on the turntable 1. Since the inspection speed of the ultrasonic inspection mechanism 3 is relatively slow, the jig 13 may be missing from the turntable 1 when the visual inspection mechanism 11 performs the next round of inspection cycle, thereby affecting the inspection process of the lithium battery 4. When the turntable 1 rotates to the position where the spare jig 13 is stored on the frame 2, the spare jig 13 will be automatically added to the turntable 1, thereby ensuring that the visual inspection mechanism 11 can always receive the lithium battery 4 for inspection, ensuring the continuity and efficiency of the inspection process, and avoiding the overall inspection efficiency being affected by the shortage of the jig 13.

[0042] By using the visual inspection mechanism 11 to perform high-speed inspection on the surface of the lithium battery 4, the internal damage risk caused by the external defects of the lithium battery 4 can be discovered in time; when a large surface defect is detected, the ultrasonic inspection mechanism 3 is used to review the interior of the lithium battery 4 to ensure that the interior of the lithium battery 4 is not damaged, and the surface defects are handled by repair or replacement. The lithium battery 4 with defects on both the surface and the interior is repaired to achieve fine grading and screening of lithium batteries. The comprehensiveness of equipment detection is improved, and multiple manual interventions are avoided, which can improve the detection efficiency of the equipment.

[0043] The present invention realizes the efficient transfer and temporary storage of lithium batteries 4 between various detection processes by adopting a ring-shaped frame 2 in combination with a turntable 1 and a fixture 13, effectively compensating for the problem of process connection mismatch caused by the ultrasonic detection speed being much lower than the visual detection speed in the prior art, thereby greatly improving the overall detection efficiency and accuracy of the equipment.

[0044] like Figures 2 to 6 , Figure 8 and Fig. 9 As shown: the ultrasonic detection mechanism 3 includes a mounting plate 32 fixedly connected to the driving disk 31, a slide rail 321 perpendicular to the extension direction of the slide groove 311 is arranged on the mounting plate 32, a slidable driving block 322 is arranged on the slide rail 321, a driver 323 for driving the driving block 322 to reciprocate is arranged on the side of the mounting plate 32 away from the slide rail 321, a first detection head 3221 for detecting the inside of the lithium battery 4 is arranged on the driving block 322, and the first detection head 3221 is arranged in a vertical state.

[0045] By arranging a driver 323 on a side of the mounting plate 32 away from the slide rail 321, the driver 323 can drive the driving block 322 to move back and forth along the slide rail 321, so that the first detection head 3221 on the driving block 322 can also move back and forth, and cooperate with the fixture 13 to drive the lithium battery 4 to move along the slide groove 311, so that the first detection head 3221 can perform a comprehensive inspection of the lithium battery 4, avoid detection blind spots, improve the integrity and reliability of the detection, and scan the internal structure of the lithium battery 4 through ultrasonic signals to determine whether it has internal defects.

[0046] By setting the driver 323 and the driving block 322 , the detection position of the first detection head 3221 can be adjusted to adapt to lithium batteries 4 of different sizes, thereby improving the versatility of the device and meeting the detection requirements of lithium batteries 4 of multiple specifications.

[0047] like Figures 2 to 6 , Figure 8 and Fig. 9As shown, a second detection head 324 for detecting the interior of the lithium battery 4 is arranged below the driving disk 31, and the second detection head 324 is arranged in a horizontal direction.

[0048] By setting the second detection head 324 below the driving disk 31, and the second detection head 324 is set in a horizontal direction, during the ultrasonic detection process, the first detection head 3221 and the second detection head 324 can perform ultrasonic detection on the lithium battery 4 from different directions respectively. The ultrasonic signal is emitted by the first detection head 3221 (or the second detection head 324), and is received by the second detection head 324 (or the first detection head 3221) after penetrating the lithium battery 4, thereby forming high-precision detection data. By analyzing the changes in the echo signal, it is determined whether there are defects or structural abnormalities inside the lithium battery 4.

[0049] By setting the first detection head 3221 (vertical direction) and the second detection head 324 (horizontal direction), multi-angle scanning of the inside of the lithium battery 4 is realized, the detection accuracy of defects is improved, and the possibility of missed detection is reduced. The double-sided detection method is adopted to enable the ultrasonic signal to effectively penetrate the lithium battery 4, and the signal change is accurately obtained through the receiving end. Compared with the single-sided detection method, it can more stably identify material defects, bubbles or interlayer separation problems inside the lithium battery 4, and there is no need to flip the lithium battery 4 additionally, and the internal structure detection of the lithium battery 4 can be completed quickly, thereby improving the detection efficiency, meeting the needs of high-speed automated production lines, and being suitable for the detection of lithium batteries 4 of different sizes, and can adapt to various specifications of lithium battery 4 products, thereby improving the scope of application of the equipment.

[0050] like Figures 4 to 10 As shown: a plurality of first rollers 312 are arranged horizontally and along the extension direction of the slide groove 311 below the driving disk 31, a first gear 3121 is sleeved on the first roller 312, a rack 131 meshing with the first gear 3121 is arranged at the bottom of the fixture 13, a first synchronous belt 3122 is sleeved on the plurality of first rollers 312, and one of the first rollers 312 is driven by a first rotary drive motor 313.

[0051] The rack 131 at the bottom of the fixture 13 can be slidably set on the slide groove 311. When the first rotation drive motor 313 is running, it will drive the first roller shaft 312 to rotate. Through the synchronous belt transmission, all the first roller shafts 312 are rotated synchronously, so that the rotation of the first roller shaft 312 drives the rotation of the first gear 3121. The rotation of the first gear 3121 drives the movement of the rack 131 meshed with it, so that the fixture 13 moves smoothly along the slide groove 311. By arranging multiple first roller shafts 312 along the extension direction of the slide groove 311, the fixture 13 can always maintain a power connection with the first gear 3121 through the rack 131 during the movement. Through the precise meshing of the first roller 312, the first gear 3121 and the rack 131, the jig 13 can perform stable linear movement along the slide groove 311, ensuring that the lithium battery 4 always maintains an accurate position during the detection process, thereby improving the accuracy and stability of ultrasonic detection; the lithium battery 4 can be moved to the detection area of ​​the ultrasonic detection mechanism 3 in a continuous and efficient manner, and quickly transferred to the next process after detection, thereby improving the detection efficiency and meeting the needs of large-scale production.

[0052] It should be noted that Fig. 9 and Fig.10 The tensioner is not shown on the first synchronous belt 3122 and is only shown in the figure for reference. The tensioner can ensure that the first gear 3121 and the first synchronous belt 3122 can maintain contact, ensure the transmission effect, and enable the fixture 13 to be driven smoothly.

[0053] like Figures 4 to 9 As shown: a gear ring 314 fixedly connected to and coaxial with the driving disc 31 is disposed at the bottom thereof, a bevel gear 22 meshingly connected to the gear ring 314 and a second rotary drive motor 221 for driving the bevel gear 22 to rotate are disposed on the frame 2, and an angle sensor 315 is disposed on the driving disc 31.

[0054] When the second rotary drive motor 221 is running, it can drive the rotation of the bevel gear 22, and the rotation of the bevel gear 22 drives the ring gear 314 to rotate, thereby driving the rotation of the drive disk 31 fixedly connected to the ring gear 314. By providing an angle sensor 315 on the drive disk 31, the rotation angle of the drive disk 31 can be detected in real time, and the detection signal is fed back to the control system at the back end to achieve precise control of the rotation position of the drive disk 31, which is convenient for the docking of the slide groove 311 with the second mounting groove 21, so that the slide groove 311 on the drive disk 31 can be docked with the second mounting groove 21 on the frame 2 according to the set angle, which can ensure that the lithium battery 4 is always in the correct detection position during the detection process, thereby improving the detection accuracy.

[0055] By adjusting the rotation of the driving disk 31 , the lithium batteries 4 can be respectively placed in different unloading stations, ensuring that each lithium battery 4 can be classified according to a predetermined process, thereby improving the coordination of the equipment.

[0056] like Figures 3 to 6 As shown: a plurality of second rollers 23 are arranged on the frame 2 below the second mounting groove 21 , a second gear 231 meshingly connected to the rack 131 is sleeved on the second roller 23 , a second synchronous belt 232 is arranged between the plurality of second rollers 23 , and the second rollers 23 are driven by a third rotation drive motor 24 .

[0057] When the third rotary drive motor 24 is driven, it will drive the second roller 23 to rotate, and the rotation of the second roller 23 will drive the second synchronous belt 232 to run, so that multiple second rollers 23 rotate simultaneously, and then drive the rotation of the second gear 231. When the fixture 13 moves to the second mounting groove 21, the second gear 231 can drive the fixture 13 to slide along the second mounting groove 21, so that the lithium battery 4 on the fixture 13 can move from the frame 2 to the turntable 1 or the driving disk 31. This structure can ensure that the lithium battery 4 can be smoothly transferred to the ultrasonic detection mechanism 3 after visual inspection, and can achieve accurate docking to the blanking process after inspection, thereby improving the coordination and operation efficiency of the whole machine inspection process.

[0058] like Figure 1 , Figure 2 and Fig.11 As shown: the visual inspection mechanism 11 includes a first inspection component 111 arranged in sequence around the turntable 1 for performing surface inspection on the front side of the lithium battery 4, a flipping component 113 for turning over the lithium battery 4 and a second inspection component 112 for performing surface inspection on the flipped lithium battery 4.

[0059] The structures of the first detection component 111 and the second detection component 112 are completely the same. The first detection component 111 and the second detection component 112 both include an industrial camera, a light source system and an image processing unit. The industrial camera is mainly used to collect high-definition images of the front of the lithium battery 4. The light source system is used to provide uniform lighting, reduce reflection and shadow interference, and ensure detection accuracy. The image processing unit is used to analyze the image using deep learning or traditional image processing algorithms to identify surface defects such as scratches, dents, and foreign objects.

[0060] After the first detection component 111 completes the detection, the turntable 1 drives the lithium battery 4 to move to the flip component 113, and the flip component 113 flips the lithium battery 4 on the fixture 13. The flip component 113 usually includes a mechanical gripper or suction cup, a rotating cylinder or a flip mechanism driven by a servo motor.

[0061] Through the cooperation of the first detection component 111 and the second detection component 112, the detection of the front and back sides of the lithium battery 4 can be completed, avoiding the omission of defects that may be caused by single-sided detection, and improving the accuracy and reliability of detection. The flip component 113 is used for automatic flipping to avoid manual intervention, making the detection process more coherent and efficient, reducing errors caused by human factors, and improving the automation level of the production line.

[0062] like Figure 1 , Figure 2 and Fig.11 As shown: the visual inspection mechanism 11 also includes a third inspection component 114 for inspecting the peripheral side of the lithium battery 4.

[0063] The structure of the third detection component 114 generally includes a surround multi-camera system or a rotating camera, combined with a special light source configuration to ensure that the side image of the lithium battery 4 is fully and clearly acquired. The third detection component 114 is used to perform defect detection on the peripheral surface of the lithium battery 4. The third detection component 114 cooperates with the first detection component 111, the flip component 113, and the second detection component 112 to achieve all-round detection of the lithium battery 4, ensuring that there are no dead angles, so that surface defects in any part of the lithium battery 4 can be accurately identified, improving product quality control capabilities, solving the problem that traditional detection equipment cannot simultaneously cover the defect detection of the side of the lithium battery 4, and improving detection coverage.

[0064] like Figures 1 to 4 , Fig.11 and Fig.12 As shown: the first detection component 111, the second detection component 112 and the third detection component 114 are all provided with a pushing component 115 for pushing the fixture 13 on the turntable 1, and the turntable 1 is also provided with a clamping block 116 driven by an electromagnetic force, and the clamping block 116 is slidably connected to the turntable 1, and the clamping block 116 can extend out of the top surface of the turntable 1 or retract without protruding from the top surface of the turntable 1, and the bottom of the fixture 13 is provided with mounting holes 132 that match the clamping block 116.

[0065] In order to optimize the inspection process of the lithium battery 4 and improve the stability and accuracy of the jig 13 during the inspection process, a pushing assembly 115 is provided on the first inspection component 111, the second inspection component 112 and the third inspection component 114, which is used to accurately push the jig 13 on the turntable 1 so that the jig 13 can be transported to the rack 2.

[0066] The structure of the pusher assembly 115 can adopt a cylinder push rod or an electric push rod, and use linear reciprocating motion to accurately push the fixture 13. During the inspection process, the pusher assembly 115 can adjust the position of the fixture 13 so that the lithium battery 4 is in the best inspection area, ensuring that the visual inspection mechanism 11 can accurately capture images.

[0067] When the jig 13 is placed on the turntable 1, the clamping block 116 is inserted into the mounting hole 132 in the vertical direction to fix the jig 13. When the power is turned on, the clamping block 116 retracts and does not protrude from the top surface of the turntable 1, unlocking the jig 13, thereby facilitating the pusher assembly 115 to drive the jig 13 to move. Through the arrangement of the clamping block 116 and the mounting hole 132, the jig 13 can be temporarily locked during the detection process to prevent it from being displaced during visual detection or ultrasonic detection, thereby improving the detection accuracy.

[0068] like Figures 1 to 3 and Fig.12 As shown: the fixture 13 is provided with anti-slip rubber strips 133 arranged in a rectangular shape.

[0069] By providing the anti-skid rubber strips 133 arranged in a rectangular row on the fixture 13, the friction between the lithium battery 4 and the fixture 13 can be effectively increased to prevent the lithium battery 4 from sliding or displacing during detection, flipping or transmission, thereby improving the fixing stability. The application of the anti-skid rubber strips 133 can prevent the lithium battery 4 from causing slight displacement due to vibration or inertia, thereby reducing detection errors and improving detection accuracy.

[0070] The fixture 13 can clamp and fix the lithium battery 4 by a mechanical clamp so that it does not shift during the transmission and detection process. A vacuum suction cup or a pneumatic adsorption device can also be used to fix the lithium battery 4 by negative pressure adsorption so that it remains stable during the detection process.

[0071] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A lithium battery defect detection device based on visual detection, comprising a frame (2) and a turntable (1) arranged on the frame (2), characterized in that: The turntable (1) is provided with a plurality of first mounting grooves (12) which are equidistantly arranged around its axis and extend radially along the turntable (1), and each first mounting groove (12) is slidably provided with a fixture (13) for fixing a lithium battery (4); A visual detection mechanism (11) is provided on the side of the turntable (1); The frame (2) is a ring-shaped structure, and is provided with a plurality of second installation grooves (21) that match the first installation grooves (12); An ultrasonic detection mechanism (3) is provided on the frame (2); a driving disk (31) fixedly connected to the ultrasonic detection mechanism (3) is provided at the bottom of the ultrasonic detection mechanism (3); the driving disk (31) is rotatably arranged on the axis of the frame (2); and a sliding groove (311) matching the second mounting groove (21) is provided on the driving disk (31); When the visual inspection mechanism (11) detects that the lithium battery (4) has a defect, the jig (13) slides along the first mounting groove (12) to the second mounting groove (21) for temporary storage; subsequently, the driving disk (31) of the ultrasonic inspection mechanism (3) rotates to dock the slide groove (311) with the second mounting groove (21), and the temporarily stored content on the jig (13) is transferred to the ultrasonic inspection position, the interior of the lithium battery (4) is inspected, and the visual inspection result is reviewed.

2. The lithium battery defect detection device based on visual inspection according to claim 1 is characterized in that: The ultrasonic detection mechanism (3) comprises a mounting plate (32) fixedly connected to the driving disk (31); a slide rail (321) perpendicular to the extension direction of the slide groove (311) is arranged on the mounting plate (32); a slidable driving block (322) is arranged on the slide rail (321); a driver (323) for driving the driving block (322) to reciprocate is arranged on a side of the mounting plate (32) away from the slide rail (321); a first detection head (3221) for detecting the interior of the lithium battery (4) is arranged on the driving block (322); the first detection head (3221) is arranged in a vertical state.

3. The lithium battery defect detection device based on visual inspection according to claim 2 is characterized in that: A second detection head (324) for detecting the interior of the lithium battery (4) is arranged below the driving disk (31); the second detection head (324) is arranged in a horizontal direction.

4. The lithium battery defect detection device based on visual inspection according to claim 1, characterized in that: A plurality of first rollers (312) are arranged below the driving disk (31) and are all in a horizontal state and arranged along the extension direction of the slide groove (311); a first gear (3121) is sleeved on the first roller (312); a rack (131) meshing with the first gear (3121) is arranged at the bottom of the fixture (13); a first synchronous belt (3122) is sleeved on the plurality of first rollers (312); and one of the first rollers (312) is driven by a first rotation drive motor (313).

5. The lithium battery defect detection device based on visual inspection according to claim 1, characterized in that: A gear ring (314) fixedly connected to and coaxial with the driving disk (31) is disposed at the bottom of the driving disk (31), a bevel gear (22) meshingly connected to the gear ring (314) and a second rotary drive motor (221) for driving the bevel gear (22) to rotate are disposed on the frame (2), and an angle sensor (315) is disposed on the driving disk (31).

6. The lithium battery defect detection device based on visual inspection according to claim 4, characterized in that: A plurality of second rollers (23) are arranged on the frame (2) below the second mounting groove (21); a second gear (231) meshingly connected to the rack (131) is sleeved on the second roller (23); a second synchronous belt (232) is arranged between the plurality of second rollers (23); and the second rollers (23) are driven by a third rotation drive motor (24).

7. The lithium battery defect detection device based on visual inspection according to claim 1, characterized in that: The visual inspection mechanism (11) comprises a first inspection component (111) arranged in sequence on the circumference of the turntable (1) for performing surface inspection on the front side of the lithium battery (4), a flipping component (113) for flipping the lithium battery (4), and a second inspection component (112) for performing surface inspection on the flipped lithium battery (4).

8. The lithium battery defect detection device based on visual detection according to claim 7, characterized in that: The visual inspection mechanism (11) further comprises a third inspection component (114) for inspecting the peripheral side of the lithium battery (4).

9. The lithium battery defect detection device based on visual inspection according to claim 8, characterized in that: The first detection component (111), the second detection component (112) and the third detection component (114) are all provided with a pushing component (115) for pushing the fixture (13) on the turntable (1), and the turntable (1) is also provided with a clamping block (116) driven by an electromagnetic force, and the bottom of the fixture (13) is provided with mounting holes (132) that match the clamping block (116).

10. A lithium battery defect detection device based on visual inspection according to any one of claims 1 to 9, characterized in that: The jig (13) is provided with anti-slip rubber strips (133) arranged in a rectangular shape.

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