CN220854678U - Lithium battery diaphragm surface flaw detector - Google Patents
Lithium battery diaphragm surface flaw detector Download PDFInfo
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- CN220854678U CN220854678U CN202322513838.8U CN202322513838U CN220854678U CN 220854678 U CN220854678 U CN 220854678U CN 202322513838 U CN202322513838 U CN 202322513838U CN 220854678 U CN220854678 U CN 220854678U
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 62
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 230000007246 mechanism Effects 0.000 claims abstract description 52
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 238000004804 winding Methods 0.000 claims abstract description 24
- 230000007704 transition Effects 0.000 claims abstract description 12
- 230000002146 bilateral effect Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 description 13
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 3
- 239000013072 incoming material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a lithium battery diaphragm surface flaw detector, which comprises a detector main body and a camera system, wherein a diaphragm conveying device comprises a diaphragm winding and unwinding mechanism and a tension control mechanism, the diaphragm winding and unwinding mechanism comprises an unwinding roller, a winding roller and a plurality of transition rollers, and the camera system comprises a camera, a light source and a camera focal length adjusting device; the camera focal length adjusting device comprises a fixed bracket and a lifting mechanism, wherein the lifting mechanism is arranged on the fixed bracket and comprises a lifting component, and the camera is connected to the lifting component; the light source is located below the camera, a detection area is formed between the light source and the camera, and the lithium battery diaphragm conveyed by the diaphragm conveying device passes through the detection area. The lithium battery diaphragm surface flaw detector comprises a camera focal length adjusting device, and can adjust the focal length of a camera so as to acquire a clearer image and improve the accuracy of lithium battery diaphragm flaw detection.
Description
Technical Field
The utility model belongs to the technical field of lithium battery diaphragm detection, and particularly relates to a lithium battery diaphragm surface flaw detector.
Background
In recent years, the development of the lithium battery industry is rapid, and especially the explosion of the new energy automobile industry, the demand and the yield of the lithium battery are improved year by year. In the structure of a lithium battery, a diaphragm is one of key inner layer components, and the performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, and directly influences the capacity, circulation, safety performance and other characteristics of the battery. Therefore, surface flaw detection of the separator is necessary for battery manufacturers.
At present, a mode of checking diaphragm incoming materials by a battery manufacturer is mainly manual sampling inspection, a section of diaphragm materials is manually intercepted, and the diaphragm materials are detected visually, so that the detection mode is low in efficiency and easy to miss inspection, the data statistics is complicated, the manual workload is large, and the production requirement of high-speed development cannot be met.
Some battery manufacturers also use a lithium battery diaphragm detector to detect the diaphragm, and the lithium battery diaphragm detector comprises a diaphragm winding and unwinding device, a diaphragm tension control device camera, a light source and other structures. The diaphragm winding and unwinding device is used for automatically winding and unwinding the diaphragm in the detection process so as to convey the diaphragm; the diaphragm tension control device is used for adjusting diaphragm tension in real time in the diaphragm conveying and detecting process, so that consistency control of diaphragm tension is realized; the camera is used for shooting an image when the lithium battery diaphragm passes through the detection area; the light source is used for providing light rays when shooting the camera, so that the shooting quality of the camera is improved.
The existing lithium battery diaphragm detector has the following defects and shortcomings: the camera position is fixed, and the focal length of the camera can not be adjusted according to specific detection working conditions, so that the best image shooting quality can not be obtained, and the diaphragm flaw detection precision is affected.
Disclosure of Invention
The utility model provides a lithium battery diaphragm surface flaw detector, which can solve the problems that in the prior art, the diaphragm manual spot inspection efficiency is low, the accuracy is poor, and the camera shooting quality is poor and the diaphragm flaw detection accuracy is affected because the focal length of a camera cannot be adjusted by the lithium battery diaphragm detector.
In order to solve the technical problems, the technical scheme adopted by the utility model is that the lithium battery diaphragm surface flaw detector comprises:
a detection machine body including a detection table;
The diaphragm conveying device is arranged on the detection workbench and comprises a diaphragm winding and unwinding mechanism and a tension control mechanism, wherein the diaphragm winding and unwinding mechanism comprises an unwinding roller, a winding roller and a plurality of transition rollers arranged between the unwinding roller and the winding roller, and the unwinding roller, the winding roller and the transition rollers are arranged in parallel and all have horizontal axes;
A camera system comprising a camera, a light source and a camera focal length adjusting device; the camera focal length adjusting device comprises a fixed support and a lifting mechanism, wherein the fixed support is fixedly arranged on the detection workbench, the lifting mechanism is arranged on the fixed support, the lifting mechanism comprises a lifting component, and the camera is connected to the lifting component; the light source is positioned below the camera, a detection area is formed between the light source and the camera, and the lithium battery diaphragm conveyed by the diaphragm conveying device passes through the detection area.
The lifting mechanism is a screw slider lifting mechanism, a screw of the lifting mechanism is vertically arranged and rotatably arranged on the fixed support, the lifting component is a first slider in threaded fit with the screw, a first vertical guide component is further arranged on the fixed support, and the first vertical guide component is in sliding guide fit with the first slider.
The camera is a linear array camera which is in a strip shape and extends along the direction parallel to the unreeling roller; the lifting mechanism is arranged at two positions and is respectively positioned at two ends of the camera, and two ends of the shell of the camera are correspondingly connected to the first sliding blocks of the two lifting mechanisms.
The camera comprises a camera body, a first connecting plate, a first sliding block, a screw hole, a first sliding block and a second sliding block, wherein the two ends of the camera body are fixedly connected with the first connecting plate, the first connecting plate is provided with round connecting holes and arc connecting holes which are respectively positioned on two sides of the screw rod, the first sliding block is provided with screw holes which are respectively arranged in one-to-one correspondence with the round connecting holes and the arc connecting holes, and the first connecting plate is connected with the first sliding block through screws.
The camera is a linear array camera which is in a strip shape and extends along the direction parallel to the unreeling roller; the lifting mechanism is arranged at one position, and the first end of the shell of the camera is fixedly connected to a first sliding block of the lifting mechanism;
The detection workbench is further fixedly provided with a second vertical guide component, the second vertical guide component is matched with a second sliding block in a sliding guide mode, and the second end of the camera is connected with the second sliding block.
The camera comprises a camera body, a first sliding block, a first connecting plate, a first sliding block and a second sliding block, wherein the first end of the camera body is fixedly connected with the first connecting plate, the first connecting plate is provided with a first circular connecting hole and a first arc connecting hole which are respectively positioned at two sides of the screw rod, the first sliding block is provided with first screw holes which are respectively arranged in one-to-one correspondence with the first circular connecting hole and the first arc connecting hole, and the first connecting plate is connected with the first sliding block through screws;
The camera comprises a camera body, a first connecting plate, a first sliding block, a first connecting plate, a first arc-shaped connecting hole, a first screw hole, a first sliding block screw, a first connecting plate, a second connecting plate, a first sliding block screw, a first sliding block and a second sliding block screw, wherein the first connecting plate is fixedly connected with the first connecting plate, the first connecting plate is provided with a first round connecting hole and a first arc-shaped connecting hole which are respectively positioned on two sides of a first vertical guiding component, the first sliding block is provided with a first screw hole which is respectively arranged in one-to-one correspondence with the first round connecting hole and the first arc-shaped connecting hole, and the first connecting plate is connected with the first sliding block screw.
The camera is a linear array camera which is in a strip shape and extends along the direction parallel to the unreeling roller; the number of the light sources is two, the extending direction of the light sources is parallel to the extending direction of the camera, wherein the light emitting surface of the first light source is opposite to the shooting surface of the camera, and the light emitting surface of the second light source is inclined relative to the shooting surface of the camera.
The first ends of the two light sources are connected to a vertically arranged mounting plate, and the mounting plate is mounted on the fixing support.
Two screw holes are formed in the first end of the first light source in a bilateral symmetry mode, two arc-shaped mounting holes are formed in the mounting plate in a bilateral symmetry mode correspondingly, and the first end of the first light source is connected with the mounting plate through screws.
The position of the mounting plate along the height direction of the fixed bracket is adjustable.
Compared with the prior art, the utility model has the following advantages and positive effects:
1. The lithium battery diaphragm surface flaw detector can realize the automation of the selective inspection of the quality of the lithium battery diaphragm, improve the detection efficiency and accuracy of the flaw detection of the diaphragm incoming material surface, and solve the problems of low manual inspection efficiency, difficult selective inspection and the like of the diaphragm incoming material;
2. The camera system of the lithium battery diaphragm surface flaw detector comprises a camera and a light source, and also comprises a camera focal length adjusting device, wherein a lifting mechanism of the camera focal length adjusting device can drive the camera to lift, so that the distance between the camera focal length adjusting device and a lithium battery diaphragm of a detection area in the vertical direction, namely the object distance, is adjusted, and further, the focal length of the camera can be adjusted, so that a clearer image can be obtained, and the accuracy of flaw detection of the lithium battery diaphragm is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic perspective view of a view angle of a lithium battery separator surface flaw detector according to an embodiment of the present utility model;
Fig. 2 is a schematic perspective view of another view angle of a lithium battery separator surface flaw detector according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a camera system of a detecting machine for detecting defects on a diaphragm surface of a lithium battery according to an embodiment of the present utility model;
FIG. 4 is a perspective view of a camera system of a lithium battery separator surface flaw detector according to an embodiment of the present utility model;
FIG. 5 is a right side view of FIG. 4;
FIG. 6 is a perspective view of another view of a camera system of a lithium battery separator surface flaw detector according to an embodiment of the present utility model;
fig. 7 is a perspective view of a camera system of a lithium battery separator surface flaw detector according to an embodiment of the present utility model, with a camera and a light source omitted.
Reference numerals:
1. A detecting machine; 100. a detector body; 110. a detection workbench; 111. a horizontal work surface; 112. a vertical work surface; 200. a diaphragm conveying device; 210. a diaphragm winding and unwinding mechanism; 211. an unreeling roller; 212. a wind-up roll; 213. a transition roller; 220. a tension measuring device; 221. a bearing with a seat; 222. a diaphragm carrier roller; 300. a camera system; 310. a camera; 311. a shooting surface; 320. a first light source; 321. a light emitting surface; 330. a second light source; 331. a light emitting surface; 340. a fixed bracket; 341. a cylindrical leg; 350. a lifting mechanism; 351. a screw rod; 352. a first slider; 353. a first vertical guide member; 354. a screw anti-rotation fixing piece; 360. a detection region; 370. a first connection plate; 371. a first circular connection hole; 372. a first arc-shaped connection hole; 380. a middle connecting plate; 390. a second vertical guide member; 3100. a second slider; 3110. a second connecting plate; 3111. a second circular connection hole; 3112. a second arc-shaped connection hole; 3120. a mounting plate; 3121. an arc-shaped mounting hole; 3122. a circular mounting hole; 3130. a clamp-shaped connector;
2. A lithium battery separator.
Detailed Description
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1 to 7, a lithium battery separator surface flaw detector 1 of the present embodiment includes a detector main body 100, a separator conveying device 200, and a camera system 300.
Wherein the inspection machine body 100 includes an inspection table 110, and the inspection table 110 includes a horizontal table top 111 and a vertical table top 112.
The diaphragm transporting device 200 is provided on the inspection table 110 for transporting the lithium battery diaphragm 2. The diaphragm conveying device 200 includes a diaphragm winding and unwinding mechanism 210 and a tension control mechanism, the diaphragm winding and unwinding mechanism 210 includes an unwinding roller 211, a winding roller 212, and a plurality of transition rollers 213 disposed between the unwinding roller 211 and the winding roller 212, and the unwinding roller 211, the winding roller 212, and the transition rollers 213 are disposed parallel to each other and each have a horizontal axis.
Specifically, the unwind roller 211, the wind-up roller 212, and the transition roller 213 are mounted on the vertical table surface 112 of the inspection table 110 with their axes perpendicular to the vertical table surface 112. The driving parts of the diaphragm winding and unwinding mechanism 210, such as the winding and unwinding servo motor, and the control unit are disposed inside the inspection machine body 100, so that the inspection machine 1 has a compact overall structure and a neat appearance. The tension control mechanism can adopt the prior art, is arranged between the unreeling roller 211 and the reeling roller 212, comprises a tension measuring device 220 and a tension controller, wherein the tension measuring device 220 consists of a pressure sensor, a belt seat bearing 221 and a diaphragm carrier roller 222, the diaphragm carrier roller 222 and the belt seat bearing 221 are assembled together and are arranged on the pressure sensor, the diaphragm is pressed on the diaphragm carrier roller 222 in the conveying process, the pressure sensor obtains a pressure value, the pressure value is converted into the diaphragm tension through the tension controller, and the torque value of the unreeling motor is controlled in real time, so that the function of implementing the tension control is realized, and the beneficial condition is provided for the detection of the surface flaws of the diaphragm.
The camera system 300 includes a camera 310, a light source, and a camera focus adjustment device. The camera focal length adjusting device comprises a fixed bracket 340 and a lifting mechanism 350, wherein the fixed bracket 340 is fixedly arranged on the horizontal workbench surface 111, the lifting mechanism 350 is arranged on the fixed bracket 340, the lifting mechanism 350 comprises a lifting component, and the camera 310 is connected to the lifting component; the light source is located below the camera 310, and forms a detection area 360 with the camera 310, and the lithium battery separator 2 conveyed by the separator conveying device 200 passes through the detection area 360. The camera 310 is used to capture images of the diaphragm passing through the detection area 360, and the light source is used to illuminate from the back of the diaphragm, improving the capture quality of the camera 310.
As shown in fig. 1 and 2, the photographing surface 311 of the camera 310 faces downward and horizontally, and the light emitting surfaces 321, 331 of the light sources face the photographing surface 311 of the camera 310; the transition rollers 213 are multiple in number and are arranged at intervals along the conveying direction of the lithium battery diaphragm 2 so as to redirect the diaphragm; the left and right sides of the detection area 360 are respectively provided with a transition roller 213, and the two transition rollers 213 have the same size and the same axis on the same horizontal plane, so that the lithium battery diaphragm 2 passing through the detection area 360 is in a horizontal state so as to be parallel to the shooting surface 311 of the camera 310, and the shot images of the lithium battery diaphragm 2 are uniform.
In the lithium battery diaphragm surface flaw detector 1 of this embodiment, the camera system 300 includes a camera focal length adjusting device in addition to the camera 310 and the light source, and the lifting mechanism 350 of the camera focal length adjusting device can drive the camera 310 to lift, so as to adjust the distance between the camera and the lithium battery diaphragm 2 in the detection area 360 in the vertical direction, that is, the object distance, and further adjust the focal length of the camera 310, so as to obtain a clearer image, and improve the accuracy of flaw detection of the lithium battery diaphragm 2.
Further, as shown in fig. 3 to 7, the lifting mechanism 350 is a screw slider lifting mechanism, the screw 351 is vertically arranged and rotatably arranged on the fixed bracket 340, the lifting component is a first slider 352 in threaded fit with the screw 351, the fixed bracket 340 is further provided with a first vertical guiding component 353, and the first vertical guiding component 353 is in sliding guiding fit with the first slider 352. Because the first slider 352 is in threaded fit with the lead screw 351 and is in sliding guide fit with the first vertical guide component 353, when the lead screw 351 is operated to rotate, the first slider 352 is driven to realize lifting action, and then the camera 310 is driven to realize lifting action, so that focal length adjustment of the camera 310 is realized.
Specifically, the screw 351 is a hand screw, and the screw is rotated by manual operation of the screw 351, and the hand screw is provided with a screw rotation preventing fixture 354 for locking the screw 351 after being adjusted in place. The first vertical guide member 353 is specifically two cylindrical rods vertically disposed, and is fixedly disposed on the fixing bracket 340.
The camera 310 is specifically a line camera, such as a CIS industrial camera, specifically a line camera using a macro sensor, which is long and extends in a direction parallel to the unreeling roller 211, that is, in a direction perpendicular to the vertical table 112, so as to fully photograph the diaphragm along the width direction of the lithium battery diaphragm 2; the lifting mechanisms 350 are arranged at two positions, and are respectively positioned at two ends of the camera 310, and two ends of the shell of the camera 310 are correspondingly connected to the first sliding blocks 352 of the two lifting mechanisms 350. The camera 310 can be cooperatively adjusted from both ends of the camera 310 to improve the adjustment accuracy of the height position of the camera 310, so as to further improve the image capturing quality and the detection accuracy.
For connection between two ends of the housing of the camera 310 and the first slider 352, specifically, referring to fig. 4, a first connection plate 370 may be fixedly connected to two ends of the housing of the camera 310, the first connection plate 370 may be provided with a circular connection hole and an arc connection hole respectively located at two sides of the screw 351, the circular connection hole and the arc connection hole are arranged left and right, the first slider 352 is provided with screw holes respectively corresponding to the circular connection hole and the arc connection hole one to one, and the first connection plate 370 is connected to the first slider 352 by screws. The circular connection holes on the first connection plates 370 at both ends are aligned with each other and the arc connection holes are aligned with each other. Through setting up the arc connecting hole, can realize that camera 310 is relative the horizontal plane and overturn around the axis of circular connecting hole, and then adjust its shooting face 311 and the depth of parallelism of lithium cell diaphragm 2, further improve the picture quality of shooing.
Since the lead screw slider lifting mechanism is typically a standard component, an intermediate connection plate 380 may be welded or screwed to the first slider 352 for screwed connection with the first connection plate 370 in order to fit the first connection plate 370 and avoid changing the dimensions of the first slider 352.
As another embodiment, the camera 310 is still a linear camera, such as a CIS industrial camera, particularly a linear camera using a macro sensor, which is long and extends in a direction parallel to the unreeling roller 211, that is, in a direction perpendicular to the vertical table 112, so as to fully photograph the diaphragm along the width direction of the lithium battery diaphragm 2; as shown in fig. 3 to 6, the lifting mechanism 350 is disposed at one place, and the first end of the housing of the camera 310 is fixedly connected to the first slider 352 of the lifting mechanism 350; the detection workbench 110 is further fixedly provided with a second vertical guide component 390, specifically a linear guide rail, which is fixedly arranged on the vertical detection table surface, the second vertical guide component 390 is slidably guided and matched with a second slider 3100, and the second end of the shell of the camera 310 is connected with the second slider 3100.
That is, one end of the camera 310 is driven to lift by the screw slider lifting mechanism, and the other end is in sliding guiding fit with the second vertical guiding component 390, and when the camera 310 is adjusted, the whole camera 310 can be driven to lift only by operating the screw slider lifting mechanism from one end of the camera 310. Because the width of the lithium battery diaphragm 2 is usually smaller, the size and weight of the used camera 310 are smaller, and the height position adjustment of the camera 310 can be satisfied by adopting a mode that one end of the lead screw is driven to lift and the other end of the lead screw slides.
Similarly, a first connecting plate 370 is fixedly connected to the first end of the shell of the camera 310, first circular connecting holes 371 and first arc connecting holes 372 are formed in the first connecting plate 370 and are respectively located on two sides of the screw rod 351, first screw holes are formed in the first sliding block 352 and are respectively in one-to-one correspondence with the first circular connecting holes 371 and the first arc connecting holes 372, and the first connecting plate 370 is connected with the first sliding block 352 through screws; the second connecting plate 3110 is fixedly connected to the second end of the housing of the camera 310, a second circular connecting hole 3111 and a second arc connecting hole 3112 are respectively formed on the second connecting plate 3110 and located on two sides of the second vertical guiding component 390, a second screw hole is formed on the second slider 3100 and is respectively arranged in one-to-one correspondence with the second circular connecting hole 3111 and the second arc connecting hole 3112, and the second connecting plate 3110 is connected with the second slider 3100 through screws.
The first circular coupling hole 371 of the first coupling plate 370 and the second circular coupling hole 3111 of the second coupling plate 3110 are aligned with each other, and the first arc coupling hole 372 of the first coupling plate 370 and the second arc coupling hole 3112 of the second coupling plate 3110 are aligned with each other. Through setting up first arc connecting hole 372, second arc connecting hole 3112, can realize that camera 310 is relative horizontal plane upset, and then adjusts the parallelism of its shooting face 311 and lithium cell diaphragm 2, further improves the picture quality of shooing.
In some embodiments of the present utility model, as also shown in fig. 3-7, the camera 310 is a linear camera, such as a CIS industrial camera, in particular a linear camera employing a macro sensor, which is elongated and extends in a direction parallel to the unwind roller 211; the number of the light sources is two, the extending directions of the light sources are parallel to the extending directions of the camera 310, the light emitting surfaces 321 and 331 of the two light sources are not only required to face the shooting surface 311 of the camera 310, but also the light emitting surface 321 of the first light source 320 faces the shooting surface 311 of the camera 310, and the light emitting surface 331 of the second light source 330 is inclined relative to the shooting surface 311 of the camera 310, namely, one light source faces the camera 310 and the other light source is obliquely projected.
The first light source 320, which is opposite to the camera 310, emits light perpendicular to the photographing surface 311 of the camera 310 and then perpendicular to the surface of the lithium battery diaphragm 2, so as to detect a fine pinhole on the lithium battery diaphragm 2, and after the gray value of the image obtained by the camera 310 is overexposed by using the principle of pinhole imaging, the pinhole is considered as a pinhole defect. The second light source diagonally opposite to the camera 310 emits light which is inclined relative to the photographing surface 311 of the camera 310 and is further inclined relative to the surface of the lithium battery diaphragm 2, so that different gray values can be obtained for flaws except pinholes, and the accuracy of flaw classification is improved.
For the installation of the light sources, specifically, the first ends of both light sources are connected to a vertically disposed mounting plate 3120, and the mounting plate 3120 is mounted on the fixing bracket 340.
Further, two screw holes are symmetrically disposed on the first end of the first light source 320, two arc-shaped mounting holes 3121 are symmetrically disposed on the mounting plate 3120, and the first end of the first light source 320 is connected with the mounting plate 3120 through two screws. The screw is aligned with the arc-shaped mounting hole 3121 and the screw hole, and by arranging the arc-shaped mounting hole 3121, the turning fine adjustment of the first light source 320 relative to the horizontal plane can be realized, and the alignment precision of the first light source and the lithium battery diaphragm 2 is improved.
Similarly, two screw holes are symmetrically arranged left and right at the first end of the second light source, a round mounting hole 3122 and an arc mounting hole 3121 are correspondingly arranged left and right at intervals on the mounting plate 3120, and the first end of the second light source is connected with the mounting plate 3120 through two screws. One of them screw is installed through cooperating with circular mounting hole 3122 and one of them screw hole, and another screw is installed through cooperating with arc mounting hole 3121 and another screw hole, through this mounting means, can make the second light source use with circular mounting hole 3122 complex axis of this screw as the center pin and overturn the fine setting to reach suitable oblique angle, improve the detection accuracy to the flaw except that the pinhole.
Further, the position of the mounting plate 3120 along the height direction of the fixing support 340 is adjustable, so that the vertical distance between the light source and the lithium battery diaphragm 2 in the detection area 360 is adjustable, so as to adjust the light source lighting intensity obtained by the lithium battery diaphragm 2 in the detection area 360, which is beneficial to improving the image shooting quality.
Specifically, the bottom of the fixing bracket 340 is a plurality of cylindrical legs 341, and the mounting plate 3120 is sleeved on two of the cylindrical legs 341 through two clamp-shaped connectors 3130 and is positioned by bolt fastening. When the height position of the mounting plate 3120 needs to be adjusted, the bolts are loosened and the mounting plate 3120 is moved in the height direction of the cylindrical leg 341, and then fastened.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A lithium battery separator surface flaw detector, comprising:
a detection machine body including a detection table;
The diaphragm conveying device is arranged on the detection workbench and comprises a diaphragm winding and unwinding mechanism and a tension control mechanism, wherein the diaphragm winding and unwinding mechanism comprises an unwinding roller, a winding roller and a plurality of transition rollers arranged between the unwinding roller and the winding roller, and the unwinding roller, the winding roller and the transition rollers are arranged in parallel and all have horizontal axes;
A camera system comprising a camera, a light source and a camera focal length adjusting device; the camera focal length adjusting device comprises a fixed support and a lifting mechanism, wherein the fixed support is fixedly arranged on the detection workbench, the lifting mechanism is arranged on the fixed support, the lifting mechanism comprises a lifting component, and the camera is connected to the lifting component; the light source is positioned below the camera, a detection area is formed between the light source and the camera, and the lithium battery diaphragm conveyed by the diaphragm conveying device passes through the detection area.
2. The lithium battery separator surface flaw detector according to claim 1, wherein,
The lifting mechanism is a screw slider lifting mechanism, a screw of the lifting mechanism is vertically arranged and rotatably arranged on the fixed support, the lifting component is a first slider in threaded fit with the screw, a first vertical guide component is further arranged on the fixed support, and the first vertical guide component is in sliding guide fit with the first slider.
3. The lithium battery separator surface flaw detector according to claim 2, wherein,
The camera is a linear array camera which is in a strip shape and extends along the direction parallel to the unreeling roller; the lifting mechanism is arranged at two positions and is respectively positioned at two ends of the camera, and two ends of the shell of the camera are correspondingly connected to the first sliding blocks of the two lifting mechanisms.
4. The lithium battery separator surface flaw detector according to claim 3, wherein,
The camera comprises a camera body, a first connecting plate, a first sliding block, a screw hole, a first sliding block and a second sliding block, wherein the two ends of the camera body are fixedly connected with the first connecting plate, the first connecting plate is provided with round connecting holes and arc connecting holes which are respectively positioned on two sides of the screw rod, the first sliding block is provided with screw holes which are respectively arranged in one-to-one correspondence with the round connecting holes and the arc connecting holes, and the first connecting plate is connected with the first sliding block through screws.
5. The lithium battery separator surface flaw detector according to claim 2, wherein,
The camera is a linear array camera which is in a strip shape and extends along the direction parallel to the unreeling roller; the lifting mechanism is arranged at one position, and the first end of the shell of the camera is fixedly connected to a first sliding block of the lifting mechanism;
The detection workbench is further fixedly provided with a second vertical guide component, the second vertical guide component is matched with a second sliding block in a sliding guide mode, and the second end of the camera is connected with the second sliding block.
6. The lithium battery separator surface flaw detector according to claim 5, wherein,
The camera comprises a camera body, a first sliding block, a first connecting plate, a first sliding block and a second sliding block, wherein the first end of the camera body is fixedly connected with the first connecting plate, the first connecting plate is provided with a first circular connecting hole and a first arc connecting hole which are respectively positioned at two sides of the screw rod, the first sliding block is provided with first screw holes which are respectively arranged in one-to-one correspondence with the first circular connecting hole and the first arc connecting hole, and the first connecting plate is connected with the first sliding block through screws;
The camera comprises a camera body, a first connecting plate, a first sliding block, a first connecting plate, a first arc-shaped connecting hole, a first screw hole, a first sliding block screw, a first connecting plate, a second connecting plate, a first sliding block screw, a first sliding block and a second sliding block screw, wherein the first connecting plate is fixedly connected with the first connecting plate, the first connecting plate is provided with a first round connecting hole and a first arc-shaped connecting hole which are respectively positioned on two sides of a first vertical guiding component, the first sliding block is provided with a first screw hole which is respectively arranged in one-to-one correspondence with the first round connecting hole and the first arc-shaped connecting hole, and the first connecting plate is connected with the first sliding block screw.
7. The lithium battery separator surface flaw detector according to claim 1, wherein,
The camera is a linear array camera which is in a strip shape and extends along the direction parallel to the unreeling roller; the number of the light sources is two, the extending direction of the light sources is parallel to the extending direction of the camera, wherein the light emitting surface of the first light source is opposite to the shooting surface of the camera, and the light emitting surface of the second light source is inclined relative to the shooting surface of the camera.
8. The lithium battery separator surface flaw detector according to claim 7, wherein,
The first ends of the two light sources are connected to a vertically arranged mounting plate, and the mounting plate is mounted on the fixing support.
9. The lithium battery separator surface flaw detector according to claim 8, wherein,
Two screw holes are formed in the first end of the first light source in a bilateral symmetry mode, two arc-shaped mounting holes are formed in the mounting plate in a bilateral symmetry mode correspondingly, and the first end of the first light source is connected with the mounting plate through screws.
10. The lithium battery separator surface flaw detector according to claim 8, wherein,
The position of the mounting plate along the height direction of the fixed bracket is adjustable.
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