A lithium battery cap defect detection device

Abstract

The present application relates to the technical field of lithium battery cap detection equipment, and specifically discloses a lithium battery cap defect detection equipment, including a workbench, two brackets are fixedly installed on the top of the workbench, and visual inspection cameras are fixedly installed on the two brackets, respectively. A lower glass and an upper glass are arranged above the workbench, and a plurality of light-blocking partitions distributed in a circumferential array are fixedly installed between the lower glass and the upper glass, and the light-blocking partitions separate the lower glass and the upper glass into a plurality of independent chambers. Through the structural design of double-layer glass and the provision of light-blocking partitions between the two layers of glass, during the visual inspection of the lithium battery cap on the glass, without affecting the inspection of the upper and lower surfaces of the lithium battery cap, when the two visual inspection cameras perform visual inspection at the same time, the light interference caused by the mutual supplementary light is small, thereby providing the accuracy of the lithium battery cap inspection.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery cap detection equipment, and in particular to a lithium battery cap defect detection equipment. Background Art

[0002] With the rapid expansion of the global new energy vehicle market, the battery cap industry has ushered in unprecedented development opportunities. The market size continues to expand and is expected to maintain rapid growth in the future. The lithium battery cap is an important component of the lithium battery, which is used to seal the battery and allow current to pass. After the lithium battery cap is produced, it is necessary to test the lithium battery cap to ensure that the quality and performance of the cap meet the safety and performance requirements of the lithium battery. The inspection includes spot welding firmness inspection, whether there are scratches, dents, protrusions, etc. on the surface, and airtightness inspection. CCD visual inspection equipment is usually used to perform high-precision inspection of the cap.

[0003] However, when using CCD visual inspection equipment to inspect the caps, the existing caps are placed on transparent glass, and visual inspection cameras are set on the upper and lower sides of the glass to inspect the upper and lower sides of the lithium battery caps at the same time. Since the two sets of visual inspection cameras have opposite fill light directions when working at the same time, the inspections of the two sets of visual inspection cameras will be greatly interfered by light, affecting the accuracy of the inspection structure. Summary of the invention

[0004] The present application proposes a lithium battery cap defect detection device, which has the advantage that a visual inspection camera can more clearly capture the surface of the lithium battery cap, so as to solve the problem that when the existing CCD visual inspection equipment inspects the cap, it is easy for the two groups of visual inspection cameras to be greatly disturbed by light when the fill light directions are opposite when the two groups of visual inspection cameras work at the same time.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a lithium battery cap defect detection device, comprising a workbench, two brackets are fixedly installed on the top of the workbench, and visual inspection cameras are fixedly installed on the two brackets respectively, a lower glass and an upper glass are arranged above the workbench, and a plurality of light-blocking partitions distributed in a circular array are fixedly installed between the lower glass and the upper glass, the light-blocking partitions separate the lower glass and the upper glass into a plurality of independent chambers, a plurality of through holes distributed in a circular array are opened at the bottom of the lower glass, a loading piece is arranged on one side below the lower glass, and a feeding conveyor belt for conveying lithium battery caps is arranged at one end of the loading piece, a box body is fixedly installed on one side of the support ring plate, a limit device and a trigger device are arranged inside the box body, and the limit device limits and blocks the lithium battery caps in the loading piece.

[0006] When in use, the lower glass and the upper glass rotate and negative pressure is drawn in each chamber therebetween. When one of the through holes moves to the top of the lithium battery cap in the loading piece, the trigger device is actuated to cause the limit device to cancel the limit blockage of the lithium battery cap in the loading piece. The negative pressure suction force of the negative pressure chamber between the lower glass and the upper glass causes the lithium battery cap with better airtightness to be adsorbed to the bottom of the lower glass and rotate with the lower glass. The two visual inspection cameras perform visual inspection on the upper and lower surfaces of the lithium battery cap respectively.

[0007] Furthermore, a plurality of support rods are fixedly installed on the top of the workbench, and the plurality of support rods are distributed in a circular array on the top of the workbench, a support ring plate is fixedly installed on the top of the support rods, a rotating member is fixedly installed on the top of the support ring plate through a plane bearing, a rotating shaft is fixedly connected to the bottom end of the rotating member, the bottom end of the rotating shaft extends to the interior of the workbench, the outer side of the rotating shaft is movably connected to the top of the workbench, and the rotating shaft is driven to rotate by a motor arranged in the workbench, and a lower glass and an upper glass are fixedly installed on the outer side of the rotating member.

[0008] Furthermore, the outer sides of the lower glass and the upper glass are sealed with a sealing sleeve, and the inner side of the sealing sleeve is sealed with the other end of the light-blocking partition.

[0009] Furthermore, the through hole is close to the outer edge of the lower glass, and the through hole is located between the two light-blocking partitions.

[0010] Furthermore, the interior of the rotating member is hollow in design, and a ventilation groove connecting each chamber is opened on the rotating member. The top end of the rotating member is fixedly connected to a rotating joint, and the end of the rotating joint away from the rotating member is fixedly connected to a negative pressure tube.

[0011] Furthermore, the limiting device includes a limiting shaft movably mounted on one side of the top of the box body, and the top of the limiting shaft extends into the loading piece, the bottom end of the limiting shaft is fixedly connected to a passive plate located in the box body, a magnetic block I is fixedly installed in the middle of the bottom end of the passive plate, an electromagnet is fixedly installed inside the box body and is located directly below the magnetic block I at the bottom of the passive plate, and a spring I movably mounted on the outside of the electromagnet is provided between the passive plate and the bottom of the inner cavity of the box body.

[0012] Furthermore, the trigger device includes a tube body fixedly installed on the side of the box body away from the limiting device, the tube body is movably sleeved with a piston plate, the top of the piston plate is fixedly connected to a moving block, the top of the moving block is fixedly installed with a magnetic block II, the tube body is fixedly installed with a support block located below the piston plate, the top of the support block is provided with two conductive terminals, the bottom of the piston plate is provided with a conductive spring located directly above the two conductive terminals, and when the conductive spring contacts the two conductive terminals, the circuit where the electromagnet is located is energized.

[0013] Beneficial effects of the present invention:

[0014] 1. A lithium battery cap defect detection device provided by the present application has a double-layer glass structural design and a light-blocking partition is arranged between the two layers of glass. During the visual inspection of the lithium battery cap on the glass, without affecting the inspection of the upper and lower surfaces of the lithium battery cap, when two visual inspection cameras perform visual inspection at the same time, the fill light from the visual inspection cameras is refracted through the glass, then passes between the two glass plates, and finally refracted through another glass, so that the light interference during mutual fill light is small, and the visual inspection camera can capture the surface of the lithium battery cap more clearly, thereby providing accuracy in lithium battery cap inspection.

[0015] 2. A lithium battery cap defect detection device provided by the present application has a double-layer glass structural design and is divided into several independent chambers by light-blocking partitions. The negative pressure suction of each chamber is used to enable the lithium battery cap with good airtightness to be adsorbed onto the glass, and the surface of the lithium battery cap is visually inspected. The lithium battery cap with poor airtightness is separated from the loading part and falls off under the rotation of the lower glass, thereby facilitating the detection of lithium battery caps with poor airtightness. When the subsequent airtightness test is performed on each lithium battery cap, the time for the subsequent airtightness test of the lithium battery cap can be effectively saved by excluding the lithium battery caps with poor airtightness in advance, thereby improving the overall efficiency of the lithium battery cap defect detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0017] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 A front view of

[0020] Figure 3 for Figure 1 Schematic diagram of the middle section structure of the two glasses;

[0021] Figure 4 for Figure 1 Top view of the middle and lower glass;

[0022] Figure 5 for Figure 2 Top view of the middle feed conveyor belt and loading parts;

[0023] Figure 6 for Figure 2 Schematic diagram of the structure of the limit device and trigger device in the middle box.

[0024] In the figure:

[0025] 1. Workbench; 2. Support rod; 3. Support ring plate; 4. Rotating part; 401, ventilation groove; 5. Lower glass; 501, through hole; 6. Upper glass; 7. Light-blocking baffle; 8. Rotating joint; 9. Negative pressure pipe; 10. Feed conveyor belt; 11. Loading part; 12. Box body; 13. Limiting shaft; 14. Passive plate; 15. Electromagnet; 16. Spring I; 17. Tube body; 18. Piston plate; 19. Moving block; 20. Support block; 21. Support ring; 22. Spring II; 23. Magnetic ring; 24. Bracket; 25. Visual inspection camera; 26. Sealing sleeve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] Example

[0028] See also Figure 1-Figure 3 A lithium battery cap defect detection device comprises a workbench 1, a plurality of support rods 2 are fixedly installed on the top of the workbench 1, the number of the support rods 2 is not less than two, and the plurality of support rods 2 are distributed in a circular array on the top of the workbench 1, a support ring plate 3 is fixedly installed on the top of the support rod 2, a rotating member 4 is fixedly installed on the top of the support ring plate 3 through a plane bearing, a rotating shaft is fixedly connected to the bottom end of the rotating member 4, the bottom end of the rotating shaft extends to the inside of the workbench 1, the outer side of the rotating shaft is movably connected to the top of the workbench 1, and the rotating shaft is driven to rotate by a motor arranged in the workbench 1, thereby driving the rotating member 4 to rotate together, a lower glass 5 and an upper glass 6 are fixedly installed on the outer side of the rotating member 4, and the lower glass 5 is located directly below the upper glass 6.

[0029] See also Figure 3-Figure 4A plurality of light-blocking baffles 7 are fixedly installed between the lower glass 5 and the upper glass 6, and the plurality of light-blocking baffles 7 are distributed in a circular array on the lower glass 5, one end of the light-blocking baffle 7 is sealed and connected to the outer side of the rotating member 4, and a sealing sleeve is sealed and connected to the outer sides of the lower glass 5 and the upper glass 6, and the inner side of the sealing sleeve is sealed and connected to the other end of the light-blocking baffle 7, and the lower glass 5 and the upper glass 6 are divided into a plurality of independent chambers by the plurality of light-blocking baffles 7, a plurality of through holes 501 are opened on the lower glass 5, and the plurality of through holes 501 are distributed in a circular array on the through holes 501, the through holes 501 are close to the outer edge of the lower glass 5, and the through holes 501 are located between the two light-blocking baffles 7, the interior of the rotating member 4 is hollow, and a ventilation groove 401 connecting the various chambers is opened on the rotating member 4.

[0030] The top of the rotating member 4 is fixedly connected with a rotating joint 8, and the end of the rotating joint 8 away from the rotating member 4 is fixedly connected with a negative pressure pipe 9, and the end of the negative pressure pipe 9 away from the rotating joint 8 is connected to the air inlet of the vacuum pump. The vacuum pump is used to continuously draw negative pressure, so that each chamber between the lower glass 5 and the upper glass 6 is always kept in a negative pressure state. Please refer to Figure 3 ,、 Figure 5-Figure 6 A feeding conveyor belt 10 is provided on one side below the lower glass 5, and the lithium battery caps are transported by the feeding conveyor belt 10. A loading piece 11 is provided at one end of the feeding conveyor belt 10. When the lower glass 5 rotates, the lithium battery caps transported to the loading piece 11 by the feeding conveyor belt 10 can be located just below the through hole 501 passing through the loading piece 11, thereby utilizing the negative pressure suction in the chamber between the lower glass 5 and the upper glass 6 to make the lithium battery caps with good sealing properties adsorbed to the bottom of the lower glass 5 and rotate with the lower glass 5, while the lithium battery caps with poor sealing properties are separated from the loading piece 11 and fall off under the rotation of the lower glass 5, thereby facilitating the detection of lithium battery caps with poor sealing properties. When performing airtightness detection on each lithium battery cap in the subsequent process, the time for subsequent airtightness detection on the lithium battery caps can be effectively saved by excluding the lithium battery caps with poor sealing properties in advance, thereby improving the overall efficiency of lithium battery cap defect detection.

[0031] A box body 12 is fixedly installed on the side of the support ring plate 3 facing the loading piece 11, and the top of one end of the box body 12 is fixedly connected to the bottom of the loading piece 11, and a limiting device and a triggering device are provided inside the box body 12, that is, when the lower glass 5 rotates, when the through hole 501 has not moved to the top of the lithium battery cap in the loading piece 11, the limiting device is used to limit the lithium battery cap to prevent the lithium battery cap from rotating with the lower glass 5. When one of the through holes 501 on the lower glass 5 rotates to the top of the lithium battery cap in the loading piece 11, the triggering device is triggered to make the limiting device contact the lithium battery cap in the loading piece 11, so that the adsorption force of the negative pressure chamber between the lower glass 5 and the upper glass 6 can be utilized to make the lithium battery cap adsorbed to the bottom of the lower glass 5 and move with the lower glass 5.

[0032] The limiting device includes a limiting shaft 13 movably mounted on one side of the top of the box body 12, and the top of the limiting shaft 13 extends into the feeding piece 11, the bottom end of the limiting shaft 13 is fixedly connected to a passive plate 14 located in the box body 12, a magnetic block I is fixedly installed in the middle of the bottom end of the passive plate 14, an electromagnet 15 located directly below the magnetic block I at the bottom of the passive plate 14 is fixedly installed inside the box body 12, and a spring I16 movably mounted on the outside of the electromagnet 15 is provided at the bottom of the passive plate 14 and the inner cavity of the box body 12. Under normal conditions, the spring The elastic force of Ⅰ16 makes the top end of the limit shaft 13 extend into the loading piece 11, and performs a limit block on the cap in the loading piece 11 as shown in the lower glass 5. When the electromagnet 15 is energized, the magnetic attraction of the electromagnet 15 on the magnetic block Ⅰ at the bottom of the passive plate 14 overcomes the elastic force of the electromagnet 15, so that the limit shaft 13 and the passive plate 14 move downward, thereby causing the top end of the limit shaft 13 to move below the lithium battery cap, canceling the limit on the lithium battery cap, and allowing the lithium battery cap to rotate with the lower glass 5.

[0033] The trigger device includes a tube body 17 fixedly mounted on the side of the box body 12 away from the limit device, a piston plate 18 is movably mounted inside the tube body 17, a moving block 19 is fixedly connected to the top of the piston plate 18, a magnetic block II is fixedly mounted on the top of the moving block 19, a support block 20 located below the piston plate 18 is fixedly mounted inside the tube body 17, two conductive terminals are arranged on the top of the support block 20, and a conductive spring is arranged on the bottom of the piston plate 18 directly above the two conductive terminals. When the conductive spring contacts the two conductive terminals, the conductive spring contacts the two conductive terminals. , the circuit where the electromagnet 15 is located is energized, and the electromagnet 15 generates a magnetic attraction to the magnetic block I at the bottom of the passive plate 14. A support ring 21 is fixedly installed at the bottom of the inner cavity of the tube body 17, and the support ring 21 is located on the outside of the support block 20. A spring II 22 is provided between the support ring 21 and the piston plate 18. A magnetic ring 23 located on one side of the through hole 501 is fixedly installed at the bottom of the lower glass 5. The magnetic ring 23 is located above the magnetic block II, and the magnetic repulsion of the magnetic ring 23 on the magnetic block II support block 20 is greater than the elastic force of the magnetic ring 23 on the piston plate 18.

[0034] When one of the through holes 501 on the lower glass 5 moves to the top of the lithium battery cap in the loading piece 11, the magnetic ring 23 on one side of the loading piece 11 is just located above the magnetic block II on the top of the moving block 19. At this time, the magnetic repulsion of the magnetic ring 23 on the magnetic block II causes the moving block 19 and the piston plate 18 to move downward as a whole. The conductive spring at the bottom of the piston plate 18 contacts the two conductive terminals, and the electromagnet 15 is energized to attract the magnetic block I at the bottom of the passive plate 14 to move downward, so that the limit shaft 13 moves downward, canceling the limit of the limit shaft 13 on the lithium battery cap in the loading piece 11. , so that the lithium battery cap in the loading piece 11 can be adsorbed on the lower glass 5 through the negative pressure suction of the negative pressure chamber between the lower glass 5 and the upper glass 6, and rotate with the lower glass 5, and when the magnetic ring 23 rotates with the lower glass 5 and is misaligned with the magnetic block II, the elastic force of the spring II 22 causes the piston plate 18 to move upward, the conductive spring sheet at the bottom of the piston plate 18 is separated from the two conductive terminals, the electromagnet 15 is powered off, and the elastic force of the spring I 16 causes the limit shaft 13 to limit and block the next lithium battery cap to be detected again.

[0035] Two brackets 24 are fixedly installed on the top of the workbench 1, and the two brackets 24 are respectively fixedly installed with a visual inspection camera 25 on one of the brackets 24 being located above the upper glass 6, and the visual inspection camera 25 on the other bracket 24 being located below the lower glass 5. The two visual inspection cameras 25 are used to perform visual inspection on the upper and lower side surfaces of the lithium battery cap on the lower glass 5 respectively, and the design of the light-blocking partition 7 between the lower glass 5 and the upper glass 6 ensures that when the two visual inspection cameras 25 perform visual inspection at the same time, the light interference caused by the mutual supplementary light is small, so that the visual inspection camera 25 can capture the surface of the lithium battery cap more clearly, thereby providing accuracy in the lithium battery cap inspection.

Claims

1. A lithium battery cap defect detection device, comprising a workbench (1), two brackets (24) are fixedly mounted on the top of the workbench (1), and visual inspection cameras (25) are respectively fixedly mounted on the two brackets (24), characterized in that: A lower glass (5) and an upper glass (6) are provided above the workbench (1), and a plurality of light-blocking baffles (7) distributed in a circumferential array are fixedly installed between the lower glass (5) and the upper glass (6), the light-blocking baffles (7) divide the lower glass (5) and the upper glass (6) into a plurality of independent chambers, a plurality of through holes (501) distributed in a circumferential array are opened at the bottom of the lower glass (5), a loading piece (11) is provided on one side below the lower glass (5), and a feeding conveyor belt (10) for conveying lithium battery caps is provided at one end of the loading piece (11), a plurality of support rods (2) are fixedly installed on the top of the workbench (1), a support ring plate (3) is fixedly installed on the top of the support rod (2), a box body (12) is fixedly installed on one side of the support ring plate (3), a limit device and a trigger device are provided inside the box body (12), and the limit device limits and blocks the lithium battery caps in the loading piece (11); When in use, the lower glass (5) and the upper glass (6) rotate and each chamber between the two is evacuated with negative pressure. When one of the through holes (501) moves to the position directly above the lithium battery cap in the loading part (11), the trigger device is activated so that the limit device cancels the limit blocking of the lithium battery cap in the loading part (11). The negative pressure suction force of the negative pressure chamber between the lower glass (5) and the upper glass (6) causes the lithium battery cap with better airtightness to be adsorbed to the bottom of the lower glass (5) and rotates with the lower glass (5). The two visual inspection cameras (25) respectively perform visual inspection on the upper and lower surfaces of the lithium battery cap.

2. The lithium battery cap defect detection device according to claim 1, characterized in that: A plurality of support rods (2) are distributed in a circular array on the top of the workbench (1); a rotating member (4) is fixedly mounted on the top of the support ring plate (3) via a plane bearing; a rotating shaft is fixedly connected to the bottom end of the rotating member (4); the bottom end of the rotating shaft extends into the interior of the workbench (1); the outer side of the rotating shaft is movably sleeved with the top of the workbench (1); and the rotating shaft is driven to rotate by a motor arranged in the workbench (1); and a lower glass (5) and an upper glass (6) are fixedly mounted on the outer side of the rotating member (4).

3. The lithium battery cap defect detection device according to claim 1, characterized in that: The outer sides of the lower glass (5) and the upper glass (6) are sealed with a sealing sleeve (26), and the inner side of the sealing sleeve (26) is sealed with the other end of the light-blocking partition (7).

4. The lithium battery cap defect detection device according to claim 3, characterized in that: The through hole (501) is close to the outer edge of the lower glass (5), and the through hole (501) is located between the two light-blocking partitions (7).

5. The lithium battery cap defect detection device according to claim 2, characterized in that: The interior of the rotating member (4) is of hollow design, and a ventilation groove (401) communicating with various chambers is provided on the rotating member (4). A rotating joint (8) is fixedly connected to the top end of the rotating member (4), and a negative pressure tube (9) is fixedly connected to the end of the rotating joint (8) away from the rotating member (4).

6. The lithium battery cap defect detection device according to claim 1, characterized in that: The limiting device comprises a limiting shaft (13) movably mounted on one side of the top of the box body (12), and the top of the limiting shaft (13) extends into the loading piece (11); the bottom end of the limiting shaft (13) is fixedly connected to a passive plate (14) located in the box body (12); a magnetic block I is fixedly mounted in the middle of the bottom end of the passive plate (14); an electromagnet (15) located directly below the magnetic block I at the bottom of the passive plate (14) is fixedly mounted inside the box body (12); and a spring I (16) movably mounted on the outside of the electromagnet (15) is provided between the passive plate (14) and the bottom of the inner cavity of the box body (12).

7. The lithium battery cap defect detection device according to claim 6, characterized in that: The trigger device comprises a tube body (17) fixedly mounted inside the box body (12) on a side away from the limiting device, a piston plate (18) being movably mounted inside the tube body (17), a moving block (19) being fixedly connected to the top of the piston plate (18), a magnetic block II being fixedly mounted on the top of the moving block (19), a supporting block (20) located below the piston plate (18) being fixedly mounted inside the tube body (17), two conductive terminals being arranged on the top of the supporting block (20), and a conductive spring being arranged directly above the two conductive terminals at the bottom of the piston plate (18), and when the conductive spring contacts the two conductive terminals, the circuit where the electromagnet (15) is located is energized.

Images