A lithium battery electrode surface defect detection device

Abstract

The present invention relates to the field of battery detection technology, and in particular to a device for detecting surface defects of lithium battery pole pieces, comprising a shell with a side opening, an industrial camera fixedly connected to the inner wall of the shell, the lens of the industrial camera facing the shell opening, a front panel fixedly connected to the shell opening, a circular driven wheel rotatably mounted on the inner wall of the front panel, a protective plate made of transparent material fixedly connected to the interior of the driven wheel to protect the lens of the industrial camera, a motor fixedly connected to the top of the interior of the shell, a drive wheel fixedly connected to the output end of the motor to drive the driven wheel to rotate. The centrifugal force generated during rotation is used to clean impurities attached to the surface of the protective plate, and the gas blown out by the air guide block forms an air flow layer on the surface of the protective plate. The air flow layer cleans the dust attached to the surface of the protective plate while also forming an air flow layer on the surface of the protective plate to isolate the transparency of the protective plate from the effects of impurities in the air.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and in particular to a device for detecting surface defects of lithium battery pole pieces. Background Art

[0002] Pole coating, a core process in lithium-ion battery manufacturing, involves evenly applying a carefully stirred slurry to the current collector and then drying it to remove the organic solvent. This process profoundly impacts numerous battery performance indicators, including capacity, internal resistance, cycle durability, and overall safety. Therefore, ensuring uniform pole coating is crucial and a key factor in determining the performance of lithium-ion batteries.

[0003] In the existing technology, most production plants use the rotation of the coating roller to drive the slurry, use the gap between the comma scraper to adjust the amount of slurry transferred, and the relative rotation of the back roller and the coating roller transfers the slurry from the coating roller to the substrate. In order to ensure the quality of the electrode coating, most factories use optical imaging to detect the coating thickness online. This method requires the installation of multiple industrial cameras in the form of a gantry above the electrode coating production line. The industrial camera is used to capture images of the slurry on the substrate, and then the image is analyzed using analysis software to obtain various parameters of the slurry on the substrate, thereby confirming whether the coating is qualified. However, in the actual production process, since the industrial camera is set up above the electrode coating production line, and before the slurry is dried, the sublimates formed by the sublimation of substances in the slurry and the volatiles of the solvent may condense on the lens of the industrial camera, affecting the image quality of the lens, resulting in reduced detection accuracy. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of contamination of industrial camera lenses in the pole piece coating production line in the prior art, and to propose a lithium battery pole piece surface defect detection device.

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

[0006] A lithium battery pole piece surface defect detection device is designed, including a shell with a side opening, an industrial camera fixedly connected to the inner wall of the shell, the industrial camera lens facing the shell opening, a front panel fixedly connected to the shell opening, a circular driven wheel rotatably mounted on the inner wall of the front panel, a protective plate made of transparent material fixedly connected to the inside of the driven wheel to protect the lens of the industrial camera, a motor fixedly connected to the top of the shell, and a driving wheel fixedly connected to the output end of the motor to drive the driven wheel to rotate.

[0007] Preferably, a ring-shaped filter is fixedly connected to the surface of the front panel, a dustproof plate is fixedly connected to the end surface of the filter, and a through hole is opened on the dustproof plate.

[0008] Preferably, a cleaning chamber is fixedly connected to the dustproof plate, a connecting rod is fixedly connected to the inner wall of the cleaning chamber, a plurality of ring gears are rotatably mounted on the end of the connecting rod, a spline sleeve is fixedly connected to the inner wall of the ring gear, a spline shaft is slidably fitted in the spline sleeve, and a cleaning head is fixedly connected to the end of the spline shaft.

[0009] Preferably, a compression spring is fixed to the inner wall of the cleaning chamber to apply elastic force to the spline shaft so that the cleaning head rests against the surface of the protective plate.

[0010] Preferably, a felt is fixed in the cleaning chamber and rests against the surface of the protective plate.

[0011] Preferably, a blowing structure is provided on the front panel, and the blowing structure includes an annular ring, which is rotatably mounted on the inner wall of the filter screen, a plurality of pipes are fixedly connected to the inner wall of the ring at equal intervals, and an annular planetary gear is rotatably mounted on the outer wall of the pipe.

[0012] Preferably, a ring-shaped air guide block is rotatably mounted on the surface of the front panel, a transmission shaft is rotatably mounted on the outer wall of the air guide block, a fan blade is fixed to the end of the transmission shaft, and the fan blade is fixed to the inner wall of the planetary gear.

[0013] Preferably, an inclined slit is provided inside the air guide block, and the pipe is fixed to the outer wall of the air guide block, and the pipe is connected to the slit.

[0014] Preferably, a second end face gear is fixedly connected to the surface of the front panel, and the second end face gear matches the planetary gear. A first end face gear is fixedly connected to the end face of the driven wheel, and the first end face gear matches the planetary gear.

[0015] The present invention proposes a lithium battery pole piece surface defect detection device, which has the beneficial effect that: when the lithium battery pole piece surface defect detection device provided by the present invention performs image acquisition on the coating production line, the lens of the industrial camera is protected by a protective plate made of transparent material to prevent sublimates and volatiles in the slurry from condensing on the lens, thereby reducing the image acquisition quality; the centrifugal force generated during rotation is used to clean impurities attached to the surface of the protective plate; the gas blown out by the air guide block forms an air flow layer on the surface of the protective plate; the air flow layer cleans the dust attached to the surface of the protective plate while also forming an air flow layer on the surface of the protective plate to isolate the transparency of the protective plate from the influence of impurities in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a lithium battery electrode surface defect detection device proposed by the present invention.

[0017] Figure 2 This is a top view of a lithium battery electrode surface defect detection device proposed by the present invention.

[0018] Figure 3 The present invention proposes a lithium battery electrode surface defect detection device Figure 2 Middle AA section view.

[0019] Figure 4 The present invention proposes a lithium battery electrode surface defect detection device Figure 2 Middle BB section.

[0020] Figure 5 This is a plan view of the internal structure of the shell of a lithium battery electrode surface defect detection device proposed by the present invention.

[0021] Figure 6 Schematic diagram of the internal structure of the shell of a lithium battery electrode surface defect detection device proposed by the present invention Figure 1 .

[0022] Figure 7 Schematic diagram of the internal structure of the shell of a lithium battery electrode surface defect detection device proposed by the present invention Figure 2 .

[0023] Figure 8 The present invention proposes a lithium battery electrode surface defect detection device Figure 7 Enlarged view of point C in the middle.

[0024] Figure 9 Schematic diagram of the internal structure of the shell of a lithium battery electrode surface defect detection device proposed by the present invention Figure 3 .

[0025] Figure 10 Schematic diagram of the internal structure of the shell of a lithium battery electrode surface defect detection device proposed by the present invention Figure 4 .

[0026] Figure 11 This is a schematic structural diagram of a ring component of a lithium battery pole piece surface defect detection device proposed by the present invention.

[0027] Figure 12 The present invention proposes a lithium battery electrode surface defect detection device Figure 11 main view.

[0028] Figure 13 The present invention proposes a lithium battery electrode surface defect detection device Figure 12 Mid-DD section view.

[0029] Figure 14 The present invention proposes a lithium battery electrode surface defect detection device Figure 13 Enlarged view of point E in the middle.

[0030] Figure 15 This is a schematic structural diagram of the inner wall of the air guide block of a lithium battery pole piece surface defect detection device proposed by the present invention.

[0031] Figure 16 The present invention proposes a lithium battery electrode surface defect detection device Figure 15 Enlarged view of point F in the middle.

[0032] Figure 17 This is a schematic diagram of the structure inside a clean room of a lithium battery pole piece surface defect detection device proposed by the present invention.

[0033] Figure 18 This is a schematic structural diagram of the ring gear of a lithium battery pole piece surface defect detection device proposed by the present invention.

[0034] In the figure: 1. Housing; 2. Industrial camera; 3. Motor; 4. Driving wheel; 5. Driven wheel; 6. Protective plate; 7. Front panel; 8. Filter; 9. Dustproof plate; 901. Through hole; 10. Ring; 11. First end face gear; 12. Second end face gear; 13. Pipe fitting; 14. Planetary gear; 15. Fan blade; 16. Transmission shaft; 17. Air guide block; 18. Slit; 19. Transmission gear; 20. Cleaning chamber; 21. Connecting rod; 22. Ring gear; 23. Spline sleeve; 24. Spline shaft; 25. Cleaning head; 26. Compression spring; 27. Felt. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Reference Figures 1-10 A lithium battery pole piece surface defect detection device includes a shell 1 with a side opening, an industrial camera 2 is fixedly connected to the inner wall of the shell 1, and the lens of the industrial camera 2 opens toward the shell 1. A front panel 7 is fixedly connected to the opening of the shell 1, and a circular driven wheel 5 is rotatably mounted on the inner wall of the front panel 7. A protective plate 6 made of transparent material is fixedly connected to the inside of the driven wheel 5 to protect the lens of the industrial camera 2. A motor 3 is fixedly connected to the top of the inside of the shell 1, and a driving wheel 4 is fixedly connected to the output end of the motor 3 to drive the driven wheel 5 to rotate. An annular filter 8 is fixedly connected to the surface of the front panel 7, and a dustproof plate 9 is fixedly connected to the end face of the filter 8. The dustproof plate 9 is provided with a through hole 901.

[0037] When the device is working, the industrial camera 2 takes images of the lithium battery pole piece through the protective plate 6 made of transparent material to detect whether there are defects on the pole piece surface. The shell 1 protects the industrial camera 2, and the protective plate 6 protects the lens of the industrial camera 2 to prevent the volatiles and sublimates of the slurry from adhering to the lens surface of the industrial camera 2 during the lithium battery pole piece coating process, thereby affecting the image quality.

[0038] In addition, when the motor 3 is running, it will drive the driving wheel 4 to rotate, and the rotation of the driving wheel 4 will drive the driven wheel 5 to rotate. Since the protective plate 6 and the driven wheel 5 are fixedly connected, the rotation of the driven wheel 5 will drive the protective plate 6 to rotate synchronously. During the rotation of the protective plate 6, the condensed liquid and impurities on the surface of the protective plate 6 will be cleaned up under the action of centrifugal force to prevent the transparency of the protective plate 6 from being reduced and affecting the quality of the image captured by the industrial camera 2.

[0039] like Figure 4-Figure 8 and Figures 11-16 As shown, a blowing structure is provided on the front panel 7, which includes an annular ring 10, which is rotatably mounted on the inner wall of the filter 8, and a plurality of pipes 13 are fixedly connected to the inner wall of the ring 10 at equal intervals, and an annular planetary gear 14 is rotatably mounted on the outer wall of the pipe 13. An annular air guide block 17 is rotatably mounted on the surface of the front panel 7, and a transmission shaft 16 is rotatably mounted on the outer wall of the air guide block 17. The end of the transmission shaft 16 is fixedly connected to a fan blade 15, and the fan blade 15 is fixed to the inner wall of the planetary gear 14. An inclined slit 18 is provided inside the air guide block 17, and the pipe 13 is fixed to the outer wall of the air guide block 17, and the pipe 13 is connected to the slit 18. A second end face gear 12 is fixed to the surface of the front panel 7, and the second end face gear 12 matches the planetary gear 14. A first end face gear 11 is fixed to the end face of the driven wheel 5, and the first end face gear 11 matches the planetary gear 14.

[0040] When the driven wheel 5 rotates, it drives the first end face gear 11 to rotate synchronously. The rotation of the first end face gear 11 drives the planetary gear 14 to rotate. Since the planetary gear 14 is engaged with the second end face gear 12 and the second end face gear 12 is in a fixed state, the planetary gear 14 will also revolve around the second end face gear 12 during the rotation process.

[0041] When the planetary gear 14 rotates, it will drive the fan blades 15 inside it to rotate. The rotation of the fan blades 15 will suck in the outside air. After passing through the filter 8, the outside air is sucked into the pipe 13, and the gas in the pipe 13 is transported to the slit 18 inside the air guide block 17. After the slit 18 guides the airflow, part of the airflow is blown to the surface of the protective plate 6, cleaning the surface of the protective plate 6 while forming a layer of airflow layer on the surface of the protective plate 6. The existence of the airflow layer can isolate the protective plate 6 from contact with the outside air to prevent dust, impurities and sublimates of slurry in the outside air from adhering to the surface of the protective plate 6 and affecting the transparency of the protective plate 6; the other part of the airflow filtered by the filter 8 will be blown into the air in front of the protective plate 6 to replace the air in front of the lens with the filtered airflow, thereby reducing the impact of impurities in the air in front of the lens on the image quality.

[0042] When the planetary gear 14 revolves, the air guide block 17 rotates, so that the air flow blown out from the slit 18 scans the surface of the protective plate 6.

[0043] like Figure 6 and Figure 7 As shown, a cleaning chamber 20 is fixedly connected to the dustproof plate 9 , and a felt 27 is fixedly connected in the cleaning chamber 20 , and the felt 27 rests on the surface of the protective plate 6 .

[0044] When the airflow cleans the surface of the protective plate 6, the dust cleaned off will be captured by the fine hairs on the felt 27 to prevent the dust from being dispersed into the environment again.

[0045] like Figures 14-18 A connecting rod 21 is fixed to the inner wall of the cleaning chamber, and a plurality of ring gears 22 are rotatably installed on the end of the connecting rod 21. A spline sleeve 23 is fixed to the inner wall of the ring gear 22, and a spline shaft 24 is slidably fitted in the spline sleeve 23. A cleaning head 25 is fixed to the end of the spline shaft 24. A compression spring 26 is fixed to the inner wall of the cleaning chamber 20 to apply elastic force to the spline shaft 24, so that the cleaning head 25 rests on the surface of the protective plate 6.

[0046] In this embodiment, there are three ring gears 22, two of which serve as driven gears and mesh with the other ring gear 22 serving as the driving gear. A transmission gear 19 is fixed to the inner wall of the air guide block 17, and the ring gear 22 serving as the driving gear meshes with the transmission gear 19. During the rotation of the air guide block 17, the ring gear 22 serving as the driving gear will be driven to rotate by the transmission gear 19, and the other two ring gears 22 will also rotate accordingly.

[0047] During the rotation of the ring gear 22, the spline shaft 24 is driven to rotate through the spline sleeve 23, and the rotation of the spline shaft 24 drives the cleaning head 25 to rotate. The cleaning head 25 is pressed against the surface of the protective plate 6 under the elastic force of the compression spring 26, so that the cleaning head 25 can grind and clean the more stubborn stains attached to the surface of the protective plate 6.

[0048] Working principle and workflow:

[0049] When the device is working, the industrial camera 2 takes images of the lithium battery pole piece through the protective plate 6 made of transparent material to detect whether there are defects on the pole piece surface. The shell 1 protects the industrial camera 2, and the protective plate 6 protects the lens of the industrial camera 2 to prevent the volatiles and sublimates of the slurry from adhering to the lens surface of the industrial camera 2 during the lithium battery pole piece coating process, thereby affecting the image quality.

[0050] In addition, when the motor 3 is running, it will drive the driving wheel 4 to rotate, and the rotation of the driving wheel 4 will drive the driven wheel 5 to rotate. Since the protective plate 6 and the driven wheel 5 are fixedly connected, the rotation of the driven wheel 5 will drive the protective plate 6 to rotate synchronously. During the rotation of the protective plate 6, the condensed liquid and impurities on the surface of the protective plate 6 will be cleaned up under the action of centrifugal force to prevent the transparency of the protective plate 6 from being reduced and affecting the quality of the image captured by the industrial camera 2.

[0051] When the driven wheel 5 rotates, it drives the first end face gear 11 to rotate synchronously. The rotation of the first end face gear 11 drives the planetary gear 14 to rotate. Since the planetary gear 14 is engaged with the second end face gear 12 and the second end face gear 12 is in a fixed state, the planetary gear 14 will also revolve around the second end face gear 12 during the rotation process.

[0052] When the planetary gear 14 rotates, it will drive the fan blades 15 inside it to rotate. The rotation of the fan blades 15 will suck in the outside air. After passing through the filter 8, the outside air is sucked into the pipe 13, and the gas in the pipe 13 is transported to the slit 18 inside the air guide block 17. After the slit 18 guides the airflow, part of the airflow is blown to the surface of the protective plate 6, cleaning the surface of the protective plate 6 while forming a layer of airflow layer on the surface of the protective plate 6. The existence of the airflow layer can isolate the protective plate 6 from contact with the outside air to prevent dust, impurities and sublimates of slurry in the outside air from adhering to the surface of the protective plate 6 and affecting the transparency of the protective plate 6; the other part of the airflow filtered by the filter 8 will be blown into the air in front of the protective plate 6 to replace the air in front of the lens with the filtered airflow, thereby reducing the impact of impurities in the air in front of the lens on the image quality.

[0053] When the planetary gear 14 revolves, the air guide block 17 rotates, so that the air flow blown out from the slit 18 scans the surface of the protective plate 6, thereby improving the cleaning quality of the air flow on the surface of the protective plate 6.

[0054] When the airflow cleans the surface of the protective plate 6, the cleaned dust will be captured by the fine hairs on the felt 27 to prevent the dust from being dispersed into the environment again.

[0055] During the rotation of the air guide block 17, the ring gear 22 will be driven to rotate through the transmission gear 19. During the rotation of the ring gear 22, the spline shaft 24 will be driven to rotate through the spline sleeve 23. The rotation of the spline shaft 24 drives the cleaning head 25 to rotate. The cleaning head 25 is pressed against the surface of the protective plate 6 under the elastic force of the compression spring 26, so that the cleaning head 25 can grind and clean the more stubborn stains attached to the surface of the protective plate 6.

[0056] Compared with the prior art, the lithium battery pole piece surface defect detection equipment provided by the present invention protects the lens of the industrial camera 2 through a protective plate 6 of transparent material when acquiring images of the coating production line to prevent sublimates and volatiles in the slurry from condensing on the lens and causing a decrease in image acquisition quality. The centrifugal force generated during rotation is used to clean impurities attached to the surface of the protective plate 6, and the gas blown out by the air guide block 17 is used to form an air flow layer on the surface of the protective plate 6. The air flow layer cleans the dust attached to the surface of the protective plate 6 while also forming an air flow layer on the surface of the protective plate 6 to isolate the transparency of the protective plate 6 from the influence of impurities in the air.

[0057] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A lithium battery electrode surface defect detection device, comprising a housing (1) with a side opening, an industrial camera (2) fixedly connected to the inner wall of the housing (1), characterized in that: The lens of the industrial camera (2) faces the opening of the housing (1), a front panel (7) is fixedly connected to the opening of the housing (1), a circular driven wheel (5) is rotatably mounted on the inner wall of the front panel (7), a protective plate (6) made of a transparent material is fixedly connected inside the driven wheel (5) to protect the lens of the industrial camera (2), a motor (3) is fixedly connected to the top end of the housing (1), and a driving wheel (4) is fixedly connected to the output end of the motor (3) to drive the driven wheel (5) to rotate; A circular filter screen (8) is fixedly connected to the surface of the front panel (7), a dustproof plate (9) is fixedly connected to the end surface of the filter screen (8), and a through hole (901) is provided on the dustproof plate (9); A cleaning chamber (20) is fixedly connected to the dustproof plate (9), a connecting rod (21) is fixedly connected to the inner wall of the cleaning chamber, a plurality of ring gears (22) are rotatably mounted on the end of the connecting rod (21), a spline sleeve (23) is fixedly connected to the inner wall of the ring gear (22), a spline shaft (24) is slidably fitted in the spline sleeve (23), and a cleaning head (25) is fixedly connected to the end of the spline shaft (24); A compression spring (26) is fixedly connected to the inner wall of the cleaning chamber (20) to apply elastic force to the spline shaft (24), so that the cleaning head (25) abuts against the surface of the protective plate (6); A felt (27) is fixedly connected to the cleaning chamber (20), and the felt (27) abuts against the surface of the protective plate (6); The front panel (7) is provided with an air blowing structure, the air blowing structure comprising an annular ring member (10), the annular ring member (10) being rotatably mounted on the inner wall of the filter screen (8), a plurality of pipe members (13) being fixedly connected to the inner wall of the annular ring member (10) at equal intervals, and an annular planetary gear (14) being rotatably mounted on the outer wall of the pipe member (13); A second end face gear (12) is fixedly connected to the surface of the front panel (7), and the second end face gear (12) matches the planetary gear (14). A first end face gear (11) is fixedly connected to the end face of the driven wheel (5), and the first end face gear (11) matches the planetary gear (14).

2. The lithium battery pole piece surface defect detection device according to claim 1, characterized in that: A circular air guide block (17) is rotatably mounted on the surface of the front panel (7), a transmission shaft (16) is rotatably mounted on the outer wall of the air guide block (17), a fan blade (15) is fixedly connected to the end of the transmission shaft (16), and the fan blade (15) is fixedly connected to the inner wall of the planetary gear (14).

3. The lithium battery pole piece surface defect detection device according to claim 2, characterized in that: An inclined slit (18) is provided inside the air guide block (17), the pipe (13) is fixed to the outer wall of the air guide block (17), and the pipe (13) is communicated with the slit (18).

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