Battery diaphragm surface defect detection equipment and process

Abstract

The present invention provides a battery diaphragm surface defect detection device and process, including a tensioning device for tensioning the battery diaphragm, a detection light source located on the outside of the battery diaphragm and a detection device located on the inside of the battery diaphragm, the tensioning device includes a plurality of tensioning limit rollers, and the plurality of tensioning limit rollers are arranged in a predetermined position to control the battery diaphragm to move along a V-shaped path; the detection device is set to be multiple, and also includes a drive control device for controlling the directional movement of the plurality of detection devices, the drive control device includes a drive control component that moves in a circular manner, and the plurality of detection devices are installed on the outer surface of the drive control component. The invention can improve the accuracy and efficiency of battery diaphragm surface defect detection.

Description

Technical Field

[0001] The present invention relates to the field of optical detection technology, and in particular to battery diaphragm surface defect detection equipment and technology. Background Art

[0002] During the production process of battery separators, the surface of the battery separators needs to be inspected to detect whether there are obvious defects. Battery separators are relatively thin, and the combination of optical inspection and image analysis equipment is a common defect detection method for battery separators.

[0003] In the prior art, the battery diaphragm is in a tensioned state and moves in a directional manner under the action of a winding device, and a light source and an image analysis device are located on the same side or opposite sides of the diaphragm to perform defect detection on the surface of the battery diaphragm. During the detection process, the image analysis device is used to analyze whether there is a difference between the image per unit area of ​​the battery diaphragm and the image in the database, thereby determining whether there are defects on the surface of the battery diaphragm.

[0004] In the existing inspection process, the battery diaphragm is in a linear and taut state at a predetermined position and moves at a predetermined rate, and the inspection device of the image analysis equipment is in a relatively static position to capture the surface of the battery diaphragm and upload the captured image to the cloud for comparison; for the inspection of the battery diaphragm by the above method, in order to ensure the clarity and accuracy of the image capture, the directional movement rate of the battery diaphragm is limited; and the inspection device is in a constant position to inspect the battery diaphragm, the inspection result is single, and the accuracy of defect detection is also limited. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a battery diaphragm surface defect detection device and process, which can improve the accuracy and efficiency of battery diaphragm surface defect detection.

[0006] To solve the above problems, the technical solution adopted by the present invention is:

[0007] A battery diaphragm surface defect detection device comprises a tensioning device for tensioning a battery diaphragm, a detection light source located on the outside of the battery diaphragm and a detection device located on the inside of the battery diaphragm, the tensioning device comprises a plurality of tensioning limit rollers, and the plurality of tensioning limit rollers are arranged in predetermined positions to control the battery diaphragm to move along a V-shaped path; the detection device is provided in plurality, and further comprises a drive control device for controlling the directional movement of the plurality of detection devices, the drive control device comprises a drive control component for circular movement, and the plurality of detection devices are installed on the outer surface of the drive control component; wherein, in the process of controlling the directional movement of the battery diaphragm, the drive control component moves synchronously with the battery diaphragm to complete the defect detection on the surface of the battery diaphragm.

[0008] Compared with traditional detection methods, through the above-mentioned structural design, the battery diaphragm can be controlled to move along a bent path, and the detection device can be controlled to move synchronously with the battery diaphragm. The detection time of the detection device is extended, and the movement rate of the battery diaphragm is increased, thereby ensuring the accuracy and efficiency of the battery diaphragm surface defect detection; and the detection device can be located at different positions to detect battery diaphragm surface defects, and the detection results are diversified, which further improves the accuracy of battery diaphragm surface defect detection.

[0009] Preferably, the tensioning device comprises a first limiting roller and a second limiting roller located in the first plane, and also comprises a third limiting roller located in the second plane, wherein the horizontal projection of the third limiting roller is located between the first limiting roller and the second limiting roller.

[0010] Preferably, both ends of the third limiting roller are rotatably connected to first connecting blocks, and an elastic telescopic rod is provided at the upper end of the first connecting block; and an adjusting device for adjusting the distance between the first limiting roller and the second limiting roller is provided between them.

[0011] Through the above-mentioned structural design, the predetermined points between the first limiting roller, the second limiting roller, and the third limiting roller can be changed, thereby changing the V-shaped path of the movement of the battery diaphragm, changing the direction and angle of movement on both sides of the battery diaphragm, and changing the angle of optical detection of the battery diaphragm while keeping the detection light source and the detection device unchanged. More detection data can be obtained, while also meeting the needs for detection of different types of films.

[0012] Preferably, the adjusting device includes an adjusting frame, and two groups of adjusting components are installed on the inner wall of the adjusting frame. The adjusting components include an adjusting screw and an electric control device for controlling the rotation of the adjusting screw. The outer side of the adjusting screw is threadedly connected with a screw sleeve, and the two screw sleeves are respectively connected to the first limiting roller and the second limiting roller.

[0013] Preferably, the drive control components are symmetrically arranged into two groups, and the two groups of drive control components are connected by a linkage shaft; the drive control components include a plurality of drive rollers and a drive belt sleeved on the outside of the plurality of drive rollers.

[0014] Preferably, the number and positions of the driving rollers are arranged according to predetermined points, and the driving belts enclose a circular moving path of a predetermined shape, and the circular moving path is a triangle, a parallelogram or a rectangle.

[0015] When the circular moving path is a triangle, the moving path of the detection device is relatively simple and controllable, and the moving rate of the detection device is similar to that of the battery diaphragm, meeting the needs of continuous detection; when the circular moving path is a parallelogram, the circular moving path of the parallelogram is completely located within the range formed by the battery diaphragm, and the deflection angles of the detection device on the four sides of the parallelogram are not quite the same. When the detection device detects outward at the positions of the four sides, the detection angle automatically changes, the number of optical image detection results increases, and the accuracy of the result detection is improved.

[0016] When the circular moving path is a rectangle, the angle and distance between the detection device and the battery diaphragm will constantly change. In this process, the detection results are more diverse and the detection effect is more accurate. However, compared with the triangular moving path, there is a deviation between the rectangular path and the battery diaphragm moving path, requiring more detection devices and more precise rate control.

[0017] Preferably, the detection device comprises a detection mounting plate, a detection groove is formed on the surface of the detection mounting plate, two groups of detection components are slidably connected on the surface of the detection groove, and a telescopic component for controlling the linear movement of the two groups of detection components is also fixed on the surface of the detection mounting plate.

[0018] Preferably, the telescopic component is a double-headed telescopic rod, the telescopic end of the double-headed telescopic rod is detachably connected to the corresponding detection component through a mounting block, the double-headed telescopic rod has a built-in elastic element and is pneumatically controlled, and the two opposite double-headed telescopic rods are connected through a delivery pipeline of a built-in pump body.

[0019] The telescopic control of two double-headed telescopic rods is completed through a set of equipment, which improves the control efficiency. The double-headed telescopic rod is located on the first side and then retracted on the second side. The double-headed telescopic rod continues to expand and contract during a cycle, meeting the detection needs. Through the above-mentioned control method, the control needs of the double-headed telescopic rod are simplified, the control difficulty is reduced, and the efficiency of optical detection of battery diaphragms is improved.

[0020] Preferably, the detection light source includes a first light-emitting component that emits a first light signal and a second light-emitting component that emits a second light signal, and the first light-emitting component and the second light-emitting component are respectively located on both sides of the V-shaped path.

[0021] The battery diaphragm surface defect detection process uses the above-mentioned battery diaphragm surface defect detection equipment, including the following steps: S1, turn on the detection light source, control multiple tensioning rollers to be in a predetermined position, and control the battery diaphragm to move along a V-shaped path; S2, drive the control component to move synchronously with the battery diaphragm, and control the detection device to move synchronously with the battery diaphragm to complete the defect detection on the battery diaphragm surface.

[0022] The beneficial effects of the present invention are:

[0023] Compared with traditional detection methods, through the above-mentioned structural design, the battery diaphragm can be controlled to move along a bent path, and the detection device can be controlled to move synchronously with the battery diaphragm. The detection time of the detection device is extended, and the movement rate of the battery diaphragm is increased, thereby ensuring the accuracy and efficiency of the battery diaphragm surface defect detection; and the detection device can be located at different positions to detect battery diaphragm surface defects, and the detection results are diversified, which further improves the accuracy of battery diaphragm surface defect detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 For the present invention Figure 1 Schematic diagram of the main structure.

[0026] Figure 3 For the present invention Figure 1 Schematic diagram of the side structure.

[0027] Figure 4 For the present invention Figure 1 Schematic diagram of the top view structure.

[0028] Figure 5 For the present invention Figure 4 AA section view of the structure.

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the drive control device of the present invention.

[0030] Figure 7 Schematic diagram of the triangular circular moving path of the present invention.

[0031] Figure 8 It is a schematic diagram of the parallelogram circular moving path of the present invention.

[0032] Fig. 9 It is a schematic diagram of the rectangular annular moving path of the present invention.

[0033] Fig.10 It is a schematic diagram of the three-dimensional structure of the detection device of the present invention.

[0034] Fig.11 For the present invention Fig.10 Schematic diagram of the main structure.

[0035] In the figure: 100, battery diaphragm; 200, detection light source; 210, first light-emitting component; 220, second light-emitting component; 300, tensioning device; 310, first limit roller; 320, second limit roller; 330, third limit roller; 331, first connecting block; 332, elastic telescopic rod; 400, adjusting device; 410, adjusting frame; 420, adjusting component; 421, screw sleeve; 422, adjusting screw; 423, electric control device; 430, rotating connecting piece; 500, driving control device; 510, linkage shaft; 520, driving control component; 521, driving roller; 522, driving belt; 600, detection device; 610, detection mounting plate; 611, detection slide; 620, detection component; 621, detection limit plate; 622, detection element; 630, telescopic component; 631, mounting block. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] The battery separator is used to separate the positive electrode material and the negative electrode material of the battery and is an important component inside the battery; the surface quality of the battery separator directly affects the overall quality of the battery.

[0038] During the production process of battery separators, the surface of the battery separators needs to be inspected to detect whether there are obvious defects. Battery separators are relatively thin, and the combination of optical inspection and image analysis equipment is a common defect detection method for battery separators.

[0039] In the prior art, the battery diaphragm is in a tensioned state and moves in a directional manner under the action of a winding device, and a light source and an image analysis device are located on the same side or opposite sides of the diaphragm to perform defect detection on the surface of the battery diaphragm. During the detection process, the image analysis device is used to analyze whether there is a difference between the image per unit area of ​​the battery diaphragm and the image in the database, thereby determining whether there are defects on the surface of the battery diaphragm.

[0040] In the existing inspection process, the battery diaphragm is in a linear and taut state at a predetermined position and moves at a predetermined rate, and the inspection device of the image analysis equipment is in a relatively static position to capture the surface of the battery diaphragm and upload the captured image to the cloud for comparison; for the inspection of the battery diaphragm by the above method, in order to ensure the clarity and accuracy of the image capture, the directional movement rate of the battery diaphragm is limited; and the inspection device is in a constant position to inspect the battery diaphragm, the inspection result is single, and the accuracy of defect detection is also limited.

[0041] In order to solve the above problems, refer to the attached Figure 1 -Attached Fig.11The improved battery separator surface defect detection equipment includes a tensioning device 300 for tensioning the battery separator 100, and also includes a detection light source 200 located on the outside of the battery separator 100 and a detection device 600 located on the inside of the battery separator 100. The surface of the battery separator 100 is detected by the detection device 600 to determine whether there are defects on the surface of the battery separator 100. The detection light source 200 and the detection device 600 are preferably arranged on both sides of the battery separator 100 to enhance the effect of showing the surface defects of the battery separator 100.

[0042] The tensioning device 300 here includes a plurality of tensioning limit rollers, which are arranged in predetermined positions to control the battery separator 100 to move along a V-shaped path; compared with the traditional linear movement of the battery separator 100, the tensioning device 300 can control the V-shaped directional movement of the battery separator 100, and can change the movement path of the battery separator 100. The detection device 600 changes its position synchronously with the battery separator 100, and can detect surface defects of the battery separator 100 in different positions and environments. More detection results can be obtained in one detection process, thereby improving the accuracy of the detection of surface defects of the battery separator 100.

[0043] It should be noted here that the battery separator 100 preferably moves in a V-shape, which can minimize the moving path of the battery separator 100 to the greatest extent, reduce the volume of the equipment, and reduce the path length of the moving detection device 600, thereby reducing the difficulty of controlling the movement of the detection device 600.

[0044] It is preferred to set up a plurality of detection devices 600, and also include a drive control device 500 for controlling the directional movement of the plurality of detection devices 600, the drive control device 500 includes a drive control component 520 that moves in a circular shape, and the plurality of detection devices 600 are installed on the outer surface of the drive control component 520; in the process of controlling the directional movement of the battery separator 100, the drive control component 520 moves synchronously with the battery separator 100 to complete the defect detection on the surface of the battery separator 100.

[0045] During the detection process, multiple detection devices 600 are displaced to the position of the inner side of the battery separator 100. Under the action of the drive control component 520, the multiple detection devices 600 can move synchronously with the battery separator 100. During the synchronous movement of the detection devices 600 and the battery separator 100, the detection range of the detection devices 600 is roughly the same. Compared with the traditional detection device 600 located at a fixed position for detection, the detection device 600 and the detection area can move synchronously, the detection time is longer, the detection image is clearer, and the detection result is more accurate; the detection device 600 moves synchronously with the battery separator 100. Under the premise of this detection method, the movement speed of the detection device 600 and the battery separator 100 can be simultaneously improved, thereby improving the efficiency of the battery separator 100 surface defect detection.

[0046] It should be noted here that the moving path of the detection device 600 close to the battery diaphragm 100 is similar to the moving path of the battery diaphragm 100, and the two change synchronously to ensure that the detection position of the detection device 600 is relatively constant; at the same time, setting the detection ranges of two adjacent detection devices 600 to partially overlap can reduce the difficulty of controlling the detection device 600, thereby ensuring detection efficiency and the accuracy of the detection results.

[0047] In summary, compared with traditional detection methods, through the above-mentioned structural design, the battery separator 100 can be controlled to move along a bent path, and the detection device 600 can be controlled to move synchronously with the battery separator 100, the detection time of the detection device 600 is extended, and the movement rate of the battery separator 100 is increased, thereby ensuring the accuracy and efficiency of the detection of surface defects of the battery separator 100; and the detection device 600 can be located at different positions to detect surface defects of the battery separator 100, and the detection results are diversified, which further improves the accuracy of the detection of surface defects of the battery separator 100.

[0048] Please refer to the attached Figure 3 Specifically, the tensioning device 300 includes two first limiting rollers 310 and a second limiting roller 320 located in the first plane, and also includes a third limiting roller 330 located in the second plane, the horizontal projection of the third limiting roller 330 is located between the first limiting roller 310 and the second limiting roller 320, the first plane and the second plane are both horizontal planes, the second plane can be located above or below the first plane, (the second plane is located above the first plane in the accompanying drawings), and the horizontal projection of the third limiting roller 330 is set to be located between the first limiting roller 310 and the second limiting roller 320. At this time, under the limitation of the first limiting roller 310, the second limiting roller 320 and the third limiting roller 330, the battery diaphragm 100 can move according to a predetermined V-shaped trajectory to meet the needs of optical detection of the battery diaphragm 100.

[0049] Compared with a traditional plane tensioning limiter, the above structure has the first limit roller 310, the second limit roller 320, and the third limit roller 330 arranged according to a predetermined trajectory, which can extend the moving path of the battery separator 100 and allow the battery separator 100 to move in different directions at a predetermined position, thereby improving the accuracy and efficiency of optical detection and meeting detection requirements.

[0050] The third limiting roller 330 is rotatably connected to the first connecting block 331 at both ends, and an elastic telescopic rod 332 is arranged on the upper end of the first connecting block 331; an adjusting device 400 for adjusting the distance between the first limiting roller 310 and the second limiting roller 320 is arranged between the first limiting roller 310 and the second limiting roller 320, and the distance between the first limiting roller 310 and the second limiting roller 320 can be adjusted by the adjusting device 400, and the elastic telescopic rod 332 can limit the third limiting roller 330, so that the third limiting roller 330 can change with the movement of the first limiting roller 310 and the second limiting roller 320.

[0051] Through the above-mentioned structural design, the predetermined points between the first limiting roller 310, the second limiting roller 320, and the third limiting roller 330 can be changed, thereby changing the V-shaped path of the movement of the battery separator 100, and changing the direction and angle of movement of both sides of the battery separator 100. When the detection light source 200 and the detection device 600 remain unchanged, the angle of optical detection of the battery separator 100 can be changed, and more detection data can be obtained, while also meeting the needs for detection of different types of films.

[0052] Specifically, the adjusting device 400 includes an adjusting frame 410, and two groups of adjusting components 420 are installed on the inner wall of the adjusting frame 410. The two groups of adjusting components 420 respectively adjust the horizontal positions of the first limiting roller 310 and the second limiting roller 320. Under special defect detection conditions, the first limiting roller 310 and the second limiting roller 320 are controlled to be in an asymmetric position, and the inclination angle of the battery separator 100 on both sides is changed to meet the detection requirements.

[0053] More specifically, the adjustment component 420 includes an adjusting screw 422 and an electric control device 423 for controlling the rotation of the adjusting screw 422. A screw sleeve 421 is threadedly connected to the outer side of the adjusting screw 422. The two screw sleeves 421 are respectively connected to the first limiting roller 310 and the second limiting roller 320. During the adjustment process, the adjusting screw 422 is controlled to rotate continuously. Here, the screw sleeve 421 is slidingly connected to the adjustment frame 410. During the continuous rotation of the adjusting screw 422, the screw sleeve 421 is controlled to move continuously in one direction. The screw sleeve 421 is connected to the corresponding first limiting roller 310 and the second limiting roller 320 to realize the coordinated control of the positions of the first limiting roller 310 and the second limiting roller 320.

[0054] It should be noted here that the adjustment components 420 are symmetrically arranged on both sides of the first limiting roller 310 and the second limiting roller 320. The adjustment device 400 includes four groups of adjustment components 420. The two adjustment screw rods 422 on the same side are rotatably connected by a rotating connecting piece 430, which can ensure the stability of the overall connection; linear drive control is performed by adjusting the screw rods 422 to meet the needs of linear drive control.

[0055] Please refer to the attached Figure 6 Preferably, the drive control components 520 are symmetrically arranged in two groups, and the two groups of drive control components 520 are connected by a linkage shaft 510; the drive control components 520 include multiple drive rollers 521 and drive belts 522 sleeved on the outside of the multiple drive rollers 521, and the two ends of the detection device 600 are respectively connected to the surfaces of the two drive belts 522. During the synchronous movement of the drive belts 522 on both sides, the detection device 600 is driven to move synchronously along a predetermined trajectory, and the detection device 600 is controlled to move along the same trajectory as the battery diaphragm 100, thereby meeting the detection device 600's demand for efficient detection of the battery diaphragm 100.

[0056] It should be noted here that the moving trajectory of the detection device 600 located on one side of the battery separator 100 changes with the trajectory formed by the battery separator 100. The battery separator 100 is installed to move along a V-shaped trajectory. The detection device 600 here moves along a similar trajectory close to one side of the battery separator 100. The moving speed of the detection device 600 is controlled to be consistent with the battery separator 100, so that the outward detection range of the detection device 600 is relatively constant, so that during the optical detection process, the detection device 600 and the battery separator 100 move relatively synchronously to meet the needs of continuous detection.

[0057] Please refer to the attached Figure 7 -Attached Fig. 9 The number and position of the driving rollers 521 are arranged according to predetermined points, and the driving belts 522 enclose a circular moving path of a predetermined shape, which is a triangle, a parallelogram or a rectangle. The driving belts 522 move in a circular shape according to a predetermined trajectory to meet the requirements for detecting the battery diaphragm 100.

[0058] When the circular moving path is a triangle, the moving path of the detection device 600 is relatively simple and controllable, and the moving rate of the detection device 600 is similar to that of the battery diaphragm 100, meeting the needs of continuous detection; when the circular moving path is a parallelogram, the circular moving path of the parallelogram is completely located within the range enclosed by the battery diaphragm 100, and the deflection angles of the four sides of the parallelogram when the detection device 600 is located are not quite the same. When the detection device 600 detects outward at the positions of the four sides, the detection angle automatically changes, the number of optical image detection results increases, and the accuracy of the result detection is improved.

[0059] When the circular moving path is a rectangle, the angle and distance between the detection device 600 and the battery diaphragm 100 will constantly change. During this process, the detection results are more diverse and the detection effect is more accurate; however, compared with the triangular moving path, there is a deviation between the rectangular path and the moving path of the battery diaphragm 100, requiring more detection devices 600 and more precise rate control.

[0060] The circular moving path formed by the driving belt 522 is determined comprehensively based on the needs of optical inspection of the battery separator 100 and the control accuracy and cost of the inspection equipment.

[0061] Please refer to the attached Fig.10 , Attachment Fig.11 Specifically, the detection device 600 includes a detection mounting plate 610, a detection groove 611 is opened on the surface of the detection mounting plate 610, and two groups of detection components 620 are slidably connected on the surface of the detection groove 611. A telescopic component 630 for controlling the linear movement of the two groups of detection components 620 is also fixed on the surface of the detection mounting plate 610. The telescopic component 630 can control the linear movement of the detection component 620 along a predetermined trajectory to meet the detection requirements, especially to meet the requirements of optical detection of a detection device 600 with a larger width and a smaller detection range; during the detection process, the telescopic component 630 is controlled to shrink at a predetermined rate, and while the detection component 620 moves linearly along the length direction of the battery separator 100, the detection component 620 and the battery separator 100 move relative to each other in the width direction, meeting the detection needs of the full-size range of the surface of the battery separator 100.

[0062] It should be noted here that the detection component 620 here includes a detection limit plate 621 and a detection element 622. The detection element 622 is an optical detection probe, which can record the surface image of the battery diaphragm 100 and upload it to the cloud for analysis, determine the difference between the image of this area of ​​the battery diaphragm 100 and the basic image, and then determine whether there are defects on the surface of the battery diaphragm 100 to complete the quality judgment.

[0063] Preferably, the telescopic component 630 is a double-headed telescopic rod, the telescopic end of the double-headed telescopic rod is detachably connected to the corresponding detection component 620 through a mounting block 631, the double-headed telescopic rod has a built-in elastic element and is pneumatically controlled, the two opposite double-headed telescopic rods are connected by a delivery pipeline of a built-in pump body, the telescopic component 630 is telescopically controlled under the control of air pressure, and during the telescopic process of both sides of the telescopic component 630, the corresponding detection component 620 is pushed to move linearly to meet the needs of detection control; the telescopic control is performed by the double-headed telescopic rod, so that the two groups of detection components 620 move linearly synchronously to meet the control requirements; and in the process of exhaust, under the action of the elastic elements on both sides, the gas discharge can be accelerated, and the resetting of the double-headed telescopic rod and the detection component 620 can be accelerated to prepare for the next detection.

[0064] In addition, the two corresponding double-headed telescopic rods are connected through a delivery pipeline of a built-in pump body to control the gas to enter the first double-headed telescopic rod. At this time, the first double-headed telescopic rod is extended at the first side for image scanning and detection; the second double-headed telescopic rod is retracted at the second side, and image detection is also performed. The telescopic control of the two double-headed telescopic rods is completed by a set of equipment, which improves the control efficiency. The double-headed telescopic rod is extended at the first side and then retracted at the second side. The double-headed telescopic rod continues to expand and contract during a cycle, meeting the detection requirements. Through the above-mentioned control method, the control requirements of the double-headed telescopic rod are simplified, the control difficulty is reduced, and the efficiency of optical detection of the battery separator 100 is improved.

[0065] The detection light source 200 includes a first light-emitting component 210 that emits a first light signal and a second light-emitting component 220 that emits a second light signal. The first light-emitting component 210 and the second light-emitting component 220 are respectively located on both sides of the V-shaped path. The first light signal and the second light signal here are different. A light source that emits different colors can be selected to highlight different impurity defects; the same light source with different intensities or different angles can also be selected to highlight different types of scratches, so that the battery separator 100 can be detected in different background environments during a single detection process, further improving the accuracy of detecting impurities on the surface of the battery separator 100.

[0066] The present invention is further described below in conjunction with the detection process.

[0067] The battery diaphragm surface defect detection process, using the above-mentioned battery diaphragm surface defect detection equipment, includes the following steps:

[0068] S1. Turn on the detection light source 200, control multiple tensioning rollers to be in a predetermined position, and control the battery separator 100 to move along a V-shaped path; the detection light source 200 can be located on both sides of the battery separator 100 to provide different types of detection light signals, so that the battery separator 100 can be detected within different light signals, impurities and defects are highlighted, and the detection accuracy of impurities and defects on the surface of the battery separator 100 is improved.

[0069] S2. The driving control component 520 moves synchronously with the battery separator 100, and the detection device 600 moves synchronously with the battery separator 100 to complete the defect detection on the surface of the battery separator 100. The detection device 600 moves synchronously with the battery separator 100. In the process of synchronous movement of the detection device 600 with the battery separator 100, the detection time and the detection accuracy can be increased, and the movement speed of the detection device 600 and the battery separator 100 can be increased synchronously, thereby improving the efficiency of the detection of the battery separator 100.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery separator surface defect detection device, comprising a tensioning device (300) for tensioning a battery separator (100), a detection light source (200) located outside the battery separator (100), and a detection device (600) located inside the battery separator (100), characterized in that: The tensioning device (300) comprises a plurality of tensioning limiting rollers, and the plurality of tensioning limiting rollers are arranged in a predetermined position to control the battery separator (100) to move along a V-shaped path; the detection device (600) is provided in plurality, and further comprises a drive control device (500) for controlling the directional movement of the plurality of detection devices (600), the drive control device (500) comprising a drive control component (520) for circular movement, and the plurality of detection devices (600) are mounted on the outer surface of the drive control component (520); In the process of controlling the directional movement of the battery separator (100), the driving control component (520) moves synchronously with the battery separator (100) to complete defect detection on the surface of the battery separator (100); The drive control components (520) are symmetrically arranged in two groups, and the two groups of the drive control components (520) are connected via a linkage shaft (510); the drive control components (520) include a plurality of drive rollers (521) and a drive belt (522) sleeved on the outside of the plurality of drive rollers (521); The detection device (600) comprises a detection mounting plate (610), a detection slide groove (611) being formed on the surface of the detection mounting plate (610), two groups of detection components (620) being slidably connected to the surface of the detection slide groove (611), and a telescopic component (630) for controlling the linear movement of the two groups of detection components (620) being fixed on the surface of the detection mounting plate (610).

2. The battery separator surface defect detection device according to claim 1, characterized in that: The tensioning device (300) comprises a first limiting roller (310) and a second limiting roller (320) located on a first plane, and also comprises a third limiting roller (330) located on a second plane, wherein the third limiting roller (330) is horizontally projected between the first limiting roller (310) and the second limiting roller (320).

3. The battery separator surface defect detection device according to claim 2, characterized in that: The third limiting roller (330) has first connection blocks (331) rotatably connected at both ends, and an elastic telescopic rod (332) is provided at the upper end of the first connection block (331); an adjustment device (400) for adjusting the distance between the first limiting roller (310) and the second limiting roller (320) is provided between the two.

4. The battery separator surface defect detection device according to claim 3, characterized in that: The adjusting device (400) comprises an adjusting frame (410), two groups of adjusting components (420) are installed on the inner wall of the adjusting frame (410), the adjusting component (420) comprises an adjusting screw (422) and an electric control device (423) for controlling the rotation of the adjusting screw (422), a screw sleeve (421) is threadedly connected to the outer side of the adjusting screw (422), and the two screw sleeves (421) are respectively connected to the first limiting roller (310) and the second limiting roller (320).

5. The battery separator surface defect detection device according to claim 1, characterized in that: The number and positions of the driving rollers (521) are arranged according to predetermined points, and the driving belts (522) are combined to form a circular moving path of a predetermined shape, wherein the circular moving path is a triangle, a parallelogram or a rectangle.

6. The battery separator surface defect detection device according to claim 1, characterized in that: The telescopic assembly (630) is a double-ended telescopic rod, the telescopic end of which is detachably connected to the corresponding detection assembly (620) via a mounting block (631), the double-ended telescopic rod has a built-in elastic element and is pneumatically controlled, and the two opposite double-ended telescopic rods are connected via a delivery pipeline of a built-in pump body.

7. The battery separator surface defect detection device according to claim 1, characterized in that: The detection light source (200) comprises a first light emitting component (210) for emitting a first light signal and a second light emitting component (220) for emitting a second light signal, wherein the first light emitting component (210) and the second light emitting component (220) are respectively located on two sides of a V-shaped path.

8. Battery separator surface defect detection process, characterized in that: Using the battery separator surface defect detection device according to any one of claims 1 to 7 comprises the following steps: S1, turning on the detection light source (200), controlling the plurality of tension rollers to be at predetermined positions, and controlling the battery separator (100) to move along a V-shaped path; S2, driving the control component (520) to move synchronously with the battery separator (100), and controlling the detection device (600) to move synchronously with the battery separator (100) to complete defect detection on the surface of the battery separator (100).

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