CN217561355U - Surface defect detection device for moving pole piece - Google Patents
Surface defect detection device for moving pole piece Download PDFInfo
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- CN217561355U CN217561355U CN202123419543.1U CN202123419543U CN217561355U CN 217561355 U CN217561355 U CN 217561355U CN 202123419543 U CN202123419543 U CN 202123419543U CN 217561355 U CN217561355 U CN 217561355U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to a pole piece detection technical field, in particular to a surface defect detection device of a moving pole piece, which comprises a surface defect detection component, an optical generator, an optical transmission component and an optical receiving and feedback device; one end of the surface defect detection assembly is used for contacting with the moving pole piece and moving relative to the moving pole piece, and the other end of the surface defect detection assembly deflects along with the concave-convex condition of the surface of the moving pole piece; the light generator is used for emitting detection light beams; the light propagation assembly is fixedly arranged at the other end of the surface defect detection assembly and is used for transmitting or reflecting the detection light beam; the light receiving and feedback device is used for receiving the detection light beam, sensing the state change of the detection light beam and feeding back the state change. The utility model provides a motion pole piece surface defect detection device can effectively detect the last tiny surface defect of motion pole piece.
Description
Technical Field
The utility model relates to a pole piece detects technical field, especially relates to a motion pole piece surface defect detection device.
Background
In the production and manufacturing process of the lithium ion battery, the quality of the pole piece has direct or indirect influence on the quality, the performance consistency and the battery safety of the battery, and the influence of the surface defect of the pole piece on the battery safety is particularly obvious.
At present, a visual inspection device is mainly used for detecting surface defects of a pole piece, namely, a Charge Coupled Device (CCD) is used for acquiring an image of the surface of the pole piece, and then whether the surface of the pole piece has defects is judged by an image analysis technology.
Generally, limited by the resolution of the CCD, the conventional visual inspection apparatus can only cope with the relatively obvious surface defects such as exposed substrate (i.e. existence of deep pits), existence of continuous scratches, or adhesion of large foreign matter impurities, and the like, and cannot effectively detect the surface defects such as existence of tiny concave-convex points or adhesion of tiny foreign matter impurities with small color difference with the pole piece. In addition, the CCD has a large detection field of view, and the movement speed of the pole piece is high in the detection process, so that the difficulty of full detection of tiny concave-convex points and tiny foreign impurities on the surface of the pole piece by the CCD is further increased.
To sum up, traditional visual detection device can't realize effective detection to small concave-convex point and foreign matter impurity. Therefore, defects outside the detection capability range of the traditional visual detection device need to be effectively detected so as to better realize the comprehensive detection of the surface defects of the pole piece.
The above information disclosed in this background section is only included to enhance understanding of the background of the disclosure and therefore may contain information that does not form the prior art that is currently known to one of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a motion pole piece surface defect detection device can effectively detect the last little surface defect of motion pole piece.
In order to achieve the above object, the present invention provides a surface defect detecting device for a moving pole piece, which comprises a surface defect detecting assembly, an optical generator, an optical transmission assembly and an optical receiver and feedback device;
one end of the surface defect detection assembly is used for contacting with the moving pole piece and moving relative to the moving pole piece, and the other end of the surface defect detection assembly deflects along with the concave-convex surface condition of the moving pole piece;
the light generator is used for emitting detection light beams;
the light transmission assembly is fixedly arranged at the other end of the surface defect detection assembly and is used for transmitting or reflecting the detection light beam;
the light receiving and feedback device is used for receiving the detection light beam passing through the light propagation assembly, sensing the state change of the detection light beam and feeding back the state change.
Optionally, the device further comprises a fixed rotating shaft arranged opposite to the moving pole piece;
the surface defect detection assembly is rotatably connected with the fixed rotating shaft.
Optionally, the number of the surface defect detection assemblies is at least two, and each group of the surface defect detection assemblies is provided with one group of the light propagation assemblies correspondingly;
the light transmission assemblies are sequentially arranged along the length direction of the fixed rotating shaft, and the rotation between every two adjacent groups of light transmission assemblies is mutually independent.
Optionally, the surface defect detecting assembly includes a rotating arm, one end of the rotating arm is provided with a probe for contacting with the surface of the moving pole piece, and the other end of the rotating arm is rotatably connected with the fixed rotating shaft.
Optionally, the surface defect detecting assembly is in sliding friction connection with the moving pole piece, and a contact part of the probe and the moving pole piece is of a pointed structure.
Optionally, the detection beam is monochromatic light.
Optionally, the light propagation assembly transmits the detection light beam through the light-transmitting mirror or reflects the detection light beam through the light-reflecting mirror.
Optionally, the state change includes at least one of an intensity change, a position change and a propagation angle change.
The beneficial effects of the utility model reside in that: the utility model provides a motion pole piece surface defect detection device, when detecting, the motion pole piece is carried forward, and the one end of surface defect detection subassembly keeps in contact with the surface of motion pole piece all the time:
if the surface of the moving pole piece has concave points, one end of the surface defect detection assembly can rotate clockwise to immediately drive the light propagation assembly at the other end to rotate clockwise, the detection light beam emitted by the light generator can generate state change after passing through the light propagation assembly, and the state change can be judged to have concave point defects on the surface of the moving pole piece after being received by the light receiving and feedback device;
if the surface of the moving pole piece has the convex points, one end of the surface defect detection assembly can rotate anticlockwise and immediately drive the light propagation assembly at the other end to rotate anticlockwise, detection light beams emitted by the light generator can generate state change after passing through the light propagation assembly, and the state change can be judged to have the convex point defects on the surface of the moving pole piece after being received by the light receiving and feedback device;
if the surface of the moving pole piece is flat and smooth, one end of the surface defect detection assembly basically cannot deflect, the light transmission assembly correspondingly cannot deflect, and the detection light beam emitted by the light generator cannot change state after passing through the light transmission assembly, so that the defect that the concave point and the convex point do not exist on the surface of the moving pole piece can be judged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic top view of a device for detecting surface defects of a moving pole piece provided in embodiment 1;
FIG. 2 is a front view of the surface defect detecting module and the light transmitting module provided in example 1;
fig. 3 is a schematic top view of the device for detecting surface defects of a moving pole piece provided in embodiment 2;
fig. 4 is a front view of the surface defect detecting assembly, the light generator, the light transmitting assembly and the light receiving and feedback device provided in example 2.
In the figure:
1. moving the pole piece; 101. salient points;
2. fixing the rotating shaft;
3. a surface defect detection assembly; 301. a probe; 302. a rotating arm;
4. a light generator;
5. a light propagating component; 501. a light-transmitting mirror; 502. a light path rotating disk; 503. a light reflector;
6. a light receiving and feedback device.
Detailed Description
To make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have the specific orientation, operate in the specific orientation configuration, and thus, should not be construed as limiting the present invention.
The present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.
Example 1
The embodiment provides a motion pole piece surface defect detection device, is applicable to and has small concave-convex point or the surface adhesion to the surface to have surface defects such as little foreign matter impurity to carry out the application scene that detects, can be under the state of quick pay-off, effectively detect the small defect of motion pole piece surface department, and detection efficiency is higher, and the missed measure rate is lower, and whole detection effect is more excellent.
It should be noted that the present invention provides a motion pole piece, which can be a pole piece, a battery pack, or other workpieces, and the present embodiment uses a pole piece as an example, but does not substantially limit the structure of the motion pole piece.
Referring to fig. 1 and fig. 2, in this embodiment, the device for detecting surface defects of a moving pole piece includes a fixed rotating shaft 2 disposed opposite to the moving pole piece 1 and located above the moving pole piece 1, a surface defect detecting assembly 3 rotatably connected to the fixed rotating shaft 2, a light propagation assembly 5 fixedly connected to one end of the surface defect detecting assembly 3 away from the moving pole piece 1, a light generator 4 fixedly disposed on one side of the light propagation assembly 5, and a light receiving and feedback device 6 fixedly disposed on the other side of the light propagation assembly 5.
Optionally, the detection light beam is a monochromatic light beam, and the light propagation assembly 5 is a light-transmitting mirror 501.
One end of the surface defect detection assembly 3, which is close to the moving pole piece 1, is provided with a probe 301, the probe 301 is used for contacting the moving pole piece 1 and moving relative to the moving pole piece 1, and the other end of the surface defect detection assembly 3 deflects along with the concave-convex condition of the surface of the moving pole piece 1 around the fixed rotating shaft 2. The light generator 4 is used for emitting a detection light beam to the light-transmissive mirror 501. The light receiver and feedback device 6 is used for receiving the detection light beam passing through each of the light-transmissive mirrors 501 and sensing a state change of the detection light beam.
Optionally, the state change of the detection beam may include at least one of an intensity change, a position change, and a propagation angle change, which is not limited in this embodiment.
It should be noted that, during the forward conveying of the moving pole piece 1, the probe 301 of the surface defect detecting assembly 3 is always in contact with the surface of the moving pole piece 1:
if the surface of the moving pole piece 1 has a concave point, the probe 301 of the surface defect detection assembly 3 rotates clockwise, and immediately drives the transparent mirror 501 at the other end to rotate clockwise correspondingly, the detection light beam emitted by the light generator 4 passes through the transparent mirror 501 and then changes state, and after the state change is received by the light receiving and feedback device 6, the concave point defect on the surface of the moving pole piece 1 can be judged;
if the surface of the moving pole piece 1 has the convex points 101, the probe 301 of the surface defect detection assembly 3 can rotate anticlockwise and immediately drive the light-transmitting mirror 501 at the other end to rotate anticlockwise correspondingly, detection light beams emitted by the light generator 4 can generate state change after passing through the light-transmitting mirror 501, and the state change can be judged to have the convex point 101 defects on the surface of the moving pole piece 1 after being received by the light receiving and feedback device 6;
if the surface of the moving pole piece 1 is flat and smooth, the probe 301 of the surface defect detection assembly 3 basically does not deflect, the other end of the surface defect detection assembly 3 correspondingly does not deflect, the transparent mirror 501 correspondingly does not rotate, and the detection light beam emitted by the light generator 4 does not change state after passing through the transparent mirror 501, so that the defect that the concave point and the convex point 101 do not exist on the surface of the moving pole piece 1 can be judged.
In this embodiment, the length direction of the fixed rotating shaft 2 is perpendicular to the advancing direction of the moving pole piece 1. Furthermore, the number of the surface defect detecting assemblies 3 is at least two, each surface defect detecting assembly 3 is provided with a group of light transmission assemblies 5 correspondingly, each surface defect detecting assembly 3 and the light transmission mirror 501 corresponding to the surface defect detecting assembly 3 are sequentially arranged along the fixed rotating shaft 2, and the rotation between the two adjacent groups of surface defect detecting assemblies 3 and the rotation between the two adjacent groups of light transmission assemblies 5 are mutually independent, that is, when one group of surface defect detecting assemblies 3 and the light transmission mirror 501 rotate due to the concave points or the convex points 101, the other group of surface defect detecting assemblies 3 and the light transmission mirrors 501 adjacent to the one group of surface defect detecting assemblies cannot rotate, so that the detection independence is maintained.
It can be understood that, a plurality of groups of surface defect detecting assemblies 3 and light-transmitting mirrors 501 are provided, and each group of surface defect detecting assemblies 3 and light-transmitting mirrors 501 only detects a small-width area in the width direction of the moving pole piece 1, which is beneficial to improving the detection precision. Further, the inspection width of each surface defect inspection assembly 3 is not more than 5mm.
In this embodiment, the surface defect detecting assembly 3 includes a probe 301 and a rotating arm 302. The probe 301 is used for contacting the surface of the moving pole piece 1, and the rotating arm 302 is rotatably connected with the fixed rotating shaft 2; the transparent mirror 501 is connected to the fixed rotating shaft 2, and the detection light beam can pass through the transparent mirror.
In an alternative embodiment, the probe 301 is a pointed structure, and is in sliding friction connection with the moving pole piece 1. Furthermore, the tip-shaped structure of the probe 301 can be provided with small comb-tooth-shaped protrusions, so that the detection precision is improved.
Optionally, the tip-shaped structure of the probe 301 is a ceramic part subjected to surface polishing treatment, so that metal impurities are prevented from being introduced, and the detection precision is ensured.
Optionally, two or more detection light passing paths with a certain included angle may be disposed on the light-transmitting mirror 501.
Further, the light-transmitting mirror 501 is provided with an angle adjusting and calibrating device, so that the initial angle can be calibrated conveniently, and the testing precision can be improved.
The moving pole piece surface defect detection device provided by the embodiment has the following advantages:
(1) even if the moving pole piece 1 moves rapidly, effective surface defect detection can be realized, and the detection speed is improved;
(2) surface defects are represented by state changes of the detection light beams, even if tiny concave points and salient points 101 are amplified to the state changes of the detection light beams in multiples through the action of the rotating arms 302, and the detection precision is obviously improved;
(3) even if the color difference between the foreign matters and the moving pole piece 1 is small, effective detection can be realized, and the detection range is wider.
Example 2
In this embodiment, compared with embodiment 1, the positions of the light transmitter, the light transmitting assembly and the light receiving and feedback device are changed, and the transmission mode of the light in the light transmitting assembly is changed from transmission to reflection. .
It should be noted that the present invention provides a motion pole piece, which can be a pole piece, a battery pack, or other workpieces, and the present embodiment uses a pole piece as an example, but does not substantially limit the structure of the motion pole piece.
Referring to fig. 3 and 4, in this embodiment, the surface defect detecting apparatus for a moving pole piece includes a fixed rotating shaft 2 disposed opposite to the moving pole piece 1 and located above the moving pole piece 1, a surface defect detecting assembly 3 rotatably connected to the fixed rotating shaft 2, a light propagation assembly 5 fixedly connected to an end of the surface defect detecting assembly 3 away from the moving pole piece 1, a light generator 4 fixedly disposed above the left of the light propagation assembly 5, and a light receiving and feedback device 6 fixedly disposed above the right of the light propagation assembly 5.
The light propagation member 5 includes a light path rotating disk 502 and a light reflecting mirror 503 fixed above the light path rotating disk 502.
The surface defect detection assembly 3 comprises a rotating arm 302 which is rotatably connected with the fixed rotating shaft 2 and a probe 301 which is fixedly connected with one end of the rotating arm 302 close to the moving pole piece, the probe 301 is used for contacting and facing the moving pole piece 1, the moving pole piece 1 moves, and then the other end of the rotating arm 302 is driven to deflect along with the concave-convex surface condition of the moving pole piece 1. The light generator 4 is used for emitting a detection light beam to the light reflecting mirror 503. The light receiving and feedback device 6 is used for receiving the detection light beam reflected by the light reflector 503 and sensing the state change of the detection light beam.
Optionally, the state change of the detection beam may include at least one of an intensity change, a position change, and a propagation angle change, which is not limited in this embodiment.
It should be noted that, in the process of forward conveying the moving pole piece 1, the probe 301 of the surface defect detecting assembly 3 is always in contact with the surface of the moving pole piece 1:
if the surface of the moving pole piece 1 has a concave point, the probe 301 of the surface defect detection assembly 3 rotates clockwise, the other end of the surface defect detection assembly 3 correspondingly rotates clockwise, the light path rotating disc 502 drives the light reflector 503 to correspondingly rotate clockwise, the detection light beam emitted by the light generator 4 passes through the light reflector 503 and then undergoes state change, and the state change is received by the light receiving and feedback device 6, so that the concave point defect on the surface of the moving pole piece 1 can be judged;
if the surface of the moving pole piece 1 has the convex points 101, the probe 301 of the surface defect detection assembly 3 rotates counterclockwise, the other end of the surface defect detection assembly 3 correspondingly rotates counterclockwise, the light path rotating disc 502 drives the light reflecting mirror 503 to correspondingly rotate counterclockwise, the detection light beam emitted by the light generator 4 passes through the light reflecting mirror 503 and then changes state, and the state change is received by the light receiving and feedback device 6, so that the defect of the convex points 101 on the surface of the moving pole piece 1 can be judged;
if the surface of the moving pole piece 1 is flat and smooth, the probe 301 of the surface defect detection assembly 3 basically does not deflect, the other end of the surface defect detection assembly 3 does not deflect, the optical path rotating disc 502 and the light reflector 503 correspondingly do not rotate, and the detection light beam emitted by the optical generator 4 does not change state after passing through the light reflector 503, so that the defect that the concave point and the convex point 101 do not exist on the surface of the moving pole piece 1 can be judged.
In this embodiment, the length direction of the fixed rotating shaft 2 is perpendicular to the advancing direction of the moving pole piece 1. Furthermore, the number of the surface defect detecting assemblies 3 and the light transmitting assemblies 5 is at least two, each of the surface defect detecting assemblies 3 and the light transmitting assemblies 5 is sequentially arranged along the fixed rotating shaft 2, and the rotation between two adjacent sets of the surface defect detecting assemblies 3 and the light transmitting assemblies 5 is mutually independent, that is, when one set of the surface defect detecting assembly 3 and the light transmitting assembly 5 rotates due to the concave point or the convex point 101, the other adjacent surface defect detecting assembly 3 and the light transmitting assembly 5 cannot rotate, so that the detection independence is maintained.
It can be understood that a plurality of groups of surface defect detecting assemblies 3 and light transmission assemblies 5 are arranged, and each group of surface defect detecting assemblies 3 and light transmission assemblies 5 only detects a small width area in the width direction of the moving pole piece 1, which is beneficial to improving the detection precision. Further, the detection width of each set of the surface defect detecting unit 3 and the light propagating unit 5 is not more than 5mm.
In this embodiment, the surface defect detecting assembly 3 includes a probe 301 and a rotating arm 302. The probe 301 is used for contacting with the surface of the moving pole piece 1, and the rotating arm 302 is rotatably connected with the fixed rotating shaft 2; the light propagation assembly 5 is connected to the fixed shaft 2, and the light reflector 503 is used for the detection light beam to reflect through.
As an alternative embodiment, the probe 301 has a tip-shaped structure, and is connected with the moving pole piece 1 in a sliding friction manner. Furthermore, the pointed probe can be provided with small comb-shaped bulges, so that the detection precision is improved. .
Optionally, the tip-shaped structure of the probe 301 is a ceramic part subjected to surface polishing treatment, so that metal impurities are prevented from being introduced, and the detection precision is ensured.
Optionally, the angles of the light generator 4, the light receiving and feedback device 6 and the light reflector 503 are adjustable, so as to adjust the measurement accuracy.
Further, the light propagation assembly 5 is provided with an angle adjustment calibration device, so that the initial angle can be calibrated conveniently, and the test precision is improved.
The moving pole piece surface defect detection device provided by the embodiment has the following advantages:
(1) even if the moving pole piece 1 moves rapidly, effective surface defect detection can be realized, and the detection speed is improved;
(2) surface defects are represented by state changes of the detection light beams, even if tiny pits and bumps 101 are multiplied on the state changes of the detection light beams through the angular rotation of the light reflecting mirror 503, and the detection precision is obviously improved;
(3) even if the color difference between the foreign matters and the moving pole piece 1 is small, effective detection can be realized, and the detection range is wider.
Example 3
The present embodiment provides a method for detecting surface defects of a moving pole piece, which is performed by the apparatus for detecting surface defects of a moving pole piece described in the foregoing embodiment 1 or 2, and has the same functions and beneficial effects.
The method for detecting the surface defects of the moving pole piece comprises the following steps:
s10: emitting a detection light beam by using a light generator and propagating the detection light beam by a light propagation component;
s20: the surface defect detection assembly slides on the surface of the moving pole piece and rotates along with the surface defect condition of the moving pole piece;
s30: the light propagation component changes the propagation state of the detection light beam along with the rotation of the surface defect detection component;
s40: and the light receiving and feedback device receives the detection light beam and judges the surface defect condition of the moving pole piece according to the state change of the detection light beam.
Optionally, the detection beam is monochromatic light.
Optionally, the state change of the detection beam includes at least one of an intensity change, a position change and a propagation angle change.
It should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be appreciated by those skilled in the art that the specification as a whole may be appropriately combined to form other embodiments as will be apparent to those skilled in the art.
The above list of detailed descriptions is only for the specific description of the feasible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention should be included within the scope of the present invention.
Claims (8)
1. A surface defect detection device for a moving pole piece is characterized by comprising a surface defect detection assembly, an optical generator, an optical transmission assembly and an optical receiver and feedback device;
one end of the surface defect detection assembly is used for contacting with the moving pole piece and moving relative to the moving pole piece, and the other end of the surface defect detection assembly deflects along with the concave-convex condition of the surface of the moving pole piece;
the light generator is used for emitting detection light beams;
the light transmission assembly is fixedly arranged at the other end of the surface defect detection assembly and is used for transmitting or reflecting the detection light beam;
the light receiving and feedback device is used for receiving the detection light beam passing through the light transmission assembly, sensing the state change of the detection light beam and feeding back the state change.
2. The device for detecting the surface defects of the moving pole piece according to claim 1, further comprising a fixed rotating shaft arranged opposite to the moving pole piece;
the surface defect detection assembly is rotatably connected with the fixed rotating shaft.
3. The moving pole piece surface defect detecting device of claim 2, wherein the number of the surface defect detecting assemblies is at least two groups, and each group of the surface defect detecting assemblies is correspondingly provided with one group of the light transmission assemblies;
the light transmission assemblies are sequentially arranged along the length direction of the fixed rotating shaft, and the rotation between every two adjacent light transmission assemblies is independent.
4. The device for detecting the surface defects of the moving pole piece according to claim 2, wherein the surface defect detecting assembly comprises a rotating arm, one end of the rotating arm is provided with a probe used for contacting with the surface of the moving pole piece, and the other end of the rotating arm is rotatably connected with the fixed rotating shaft.
5. The moving pole piece surface defect detecting device of claim 4, wherein the surface defect detecting assembly is in sliding friction connection with the moving pole piece, and the contact part of the probe and the moving pole piece is of a pointed structure.
6. The device for detecting surface defects of a moving pole piece according to claim 1, wherein the detection light beam is monochromatic light.
7. The moving pole piece surface defect detection device of claim 1, wherein the light propagation assembly transmits the detection light beam through a light transmissive mirror or reflects the detection light beam through a light reflective mirror.
8. The moving pole piece surface defect detecting device of claim 1, wherein the state change comprises at least one of an intensity change, a position change and a propagation angle change.
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| CN202123419543.1U CN217561355U (en) | 2021-12-30 | 2021-12-30 | Surface defect detection device for moving pole piece |
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| CN202123419543.1U CN217561355U (en) | 2021-12-30 | 2021-12-30 | Surface defect detection device for moving pole piece |
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