CN114850072A - Electrode outer ring detection device, detection method and electrode comprehensive detection equipment - Google Patents
Electrode outer ring detection device, detection method and electrode comprehensive detection equipment Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
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- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
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- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
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Abstract
The invention provides an electrode outer ring detection device, a detection method and electrode comprehensive detection equipment, belonging to the field of battery detection based on machine vision, wherein the device comprises an image acquisition unit, a light source assembly and an image processor; the light source assembly provides shadowless light for the electrode to be detected, and the image acquisition unit is arranged at the periphery of the light source assembly and is used for acquiring an image of the electrode to be detected, which comprises an outer ring; the image processor is in telecommunication connection with the image acquisition unit and the light source assembly and is used for controlling image acquisition and image processing; the scheme is based on the outer circle detection of machine vision, and the background judgment is that a crush zone exists in an outer circle image through an image algorithm, so that the working efficiency and the detection quality are improved, and the method can be widely applied to the field of detection of power batteries.
Description
Technical Field
The invention belongs to the field of battery detection based on machine vision, and particularly relates to an electrode outer ring detection device, a detection method and electrode comprehensive detection equipment, which can be widely popularized and applied to product detection of an electrode or an end cover of an automobile power battery.
Background
With the environmental deterioration and the application of new energy technology, power batteries are widely applied to electric vehicles, and from 1865, 2170 to 4680, 4695, technological innovation leads to the volume and energy density of the batteries to be improved more and more, and the energy modules of the electric vehicles are further developed and promoted.
With the 4680/4695 power battery, the electrode of the battery (see fig. 1) has been eliminated the battery tab step by step, and the non-tab structure is adopted to reduce or eliminate the heating point, therefore, the cost of the heat control or cooling or heat dissipation system of the automobile is further reduced. However, the quality requirements of the battery end cover without the tab are also correspondingly improved, and the tolerance of burrs, dirt, foreign matters, scratches, pits, bright marks, abnormal colors, metal chips and the like of the battery end cover is further reduced.
In the field of processing technology of battery pole pieces/electrodes, when pole pieces are coated and cut, whether the outer rings of the electrodes are damaged by pressure or not needs to be checked, and attention is particularly paid to power batteries. The existing outer ring flaw detection method is to detect by means of manual observation, hand touch, semi-automatic observation and the like; obviously, the traditional manual visual detection or semi-automatic detection can not meet the current production requirements of high precision and high efficiency, and easily causes the problems of missing detection, wrong parts, instability and the like.
Therefore, the invention aims to find an intelligent battery electrode outer ring detection scheme so as to improve the detection accuracy and efficiency of the battery electrode and ensure the production quality.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an electrode outer ring detection device, a detection method and electrode comprehensive detection equipment, which can solve the problems.
The design principle is as follows: the outer circle detection based on machine vision is carried out on the electrodes, and the background judges that a crush zone exists in the outer circle image through an image algorithm, so that the working efficiency and the detection quality are improved; the overall scheme is as follows.
An electrode outer ring detection device comprises an image acquisition unit, a light source assembly and an image processor; the light source assembly provides shadowless light for the electrode to be detected, and the image acquisition unit is arranged on the periphery of the light source assembly and used for acquiring an image of the electrode to be detected, including an outer ring; the image processor is in telecommunication connection with the image acquisition unit and the light source assembly and is used for controlling image acquisition and image processing and judging whether the outer ring of the electrode has an image area without damage or pressure damage.
Furthermore, the image acquisition unit comprises an outer ring inspection camera and an outer ring inspection lens which are obliquely arranged relative to the electrode to be detected in horizontal transmission, and the light path of the outer ring inspection lens is arranged over against the outer ring of the electrode to be detected; the light source assembly comprises an upper annular shadowless light source and a lower annular shadowless light source which are coaxially arranged at an upper-lower interval, and the electrode to be measured is horizontally transmitted between the upper annular shadowless light source and the lower annular shadowless light source.
Furthermore, the height distance between the incident bottom end surface of the outer ring inspection lens and the incident surface of the electrode to be detected is smaller than the height distance between the annular shadowless light source on the same side with the outer ring inspection lens and the electrode to be detected, and the inclination angle alpha of the outer ring inspection lens is 10-45 degrees.
Further, the image acquisition unit comprises a plurality of groups of outer ring cameras and outer ring lenses which are annularly arranged, and the plurality of groups of outer ring cameras and outer ring lenses are connected to one annular hanging plate in a rotating mode through the camera lens adjusting adapter; the upper annular shadowless light source is connected to the lower part of the annular hanging plate in a rotating mode through the upper light source adjusting adapter.
Furthermore, a suspension adapter assembly is arranged above the annular suspension plate and is connected with the upper frame in a suspension manner; and the lower annular shadowless light source is connected with the lower rack in a supported manner through a bottom light source adapter at the bottom.
Furthermore, the annular hanging plate comprises an upper mounting substrate and a lower rotating plate which are coaxially connected and arranged, and the upper annular shadowless light source is connected to the lower rotating plate in a rotating mode through an upper light source adjusting adapter; a camera lens adjustment adaptor is mounted to the upper mounting substrate; the lower part of the suspension adapter assembly penetrates through the adjustment waist-shaped groove of the upper mounting base plate and then is fixed to the lower rotating plate.
Furthermore, a wiring board is arranged in the middle of the suspension adapter component.
The invention also provides an outer ring detection method according to the electrode outer ring detection device, which comprises the following steps:
s1, acquiring an electrode outer ring image through an image acquisition unit;
s2, positioning a crush ROI (region of interest) of the image of the outer ring of the electrode to obtain a crush detection region;
and S3, carrying out gray level binarization processing on the image of the crush detection area to obtain an outer ring crush defect area.
The invention also provides electrode comprehensive detection equipment which comprises a feeding module, a detection receiving platform, a detection station, an NG receiving platform, an OK discharging module, a rack and an industrial controller; the feeding module is arranged at the upstream end of the detection receiving platform; the NG material receiving platform and the OK material discharging module are arranged at the downstream of the detection material receiving platform; the detection stations are annularly arranged along the rotary disc type detection material receiving table so as to carry out multi-station comprehensive detection on the battery electrodes passing through the detection material receiving table, and the industrial controller classifies the detected electrode defects; the NG material receiving platform is provided with a plurality of defect material boxes and corresponding temporary storage material boxes, and receives electrodes with different defect types according to the detection result of the industrial controller; the OK blanking module receives the flawless OK electrode.
Compared with the prior art, the invention has the beneficial effects that: by the electrode outer ring detection device, the detection method and the electrode comprehensive detection equipment, comprehensive detection of various defects including outer ring crush detection of the battery electrode is provided, the problems of high omission ratio, low speed and the like caused by manual or semi-automatic detection are avoided, and the electrode outer ring detection device and the electrode comprehensive detection equipment can be widely applied to detection of power batteries.
Drawings
FIG. 1 is a schematic diagram of a 4680 cell and its electrodes;
2-5 are schematic views of the electrode outer ring detection device;
FIG. 6 is a plan view of the detection state of the electrode outer ring detection device;
FIG. 7 is a flow chart of a method of outer race detection;
FIG. 8 is a comparison of electrode outer ring OK and defect;
fig. 9 is a schematic diagram of an electrode comprehensive detection device.
In the figure:
1. an outer circle camera;
2. an outer circle inspection lens;
3. an upper annular shadowless light source;
4. a lower annular shadowless light source;
5. a camera lens adjusting adaptor;
6. an annular hanger plate; 61. an upper mounting substrate; 62. a lower rotating plate;
7. an upper light source adjustment adaptor;
8. a suspension adapter assembly;
9. a bottom light source adapter;
10. a wiring board;
100. a feeding module;
200. detecting a receiving platform;
300. a burr detection module;
400. a front side detection module;
500. a back side detection module;
600. an outer ring detection module;
700. an inner wall detection module;
800. an NG material receiving platform;
900. an OK blanking module;
1000. and a frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be understood that "device," "apparatus," "unit" and/or "module" as used in this specification is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of the present specification. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.
Electrode outer ring detection device
An electrode outer ring detection device, referring to fig. 1-6, comprises an image acquisition unit, a light source assembly and an image processor. The light source assembly provides shadowless light for the electrode to be measured, and the image acquisition unit is arranged on the periphery of the light source assembly and used for acquiring an image of the outer ring of the electrode to be measured.
The image processor is in telecommunication connection with the image acquisition unit and the light source assembly and is used for controlling image acquisition and image processing and judging whether the outer ring of the electrode has an image area without damage or pressure damage.
The image acquisition unit comprises an outer ring inspection camera 1 and an outer ring inspection lens 2 which are obliquely arranged relative to the electrode to be detected in horizontal transmission, and the light path of the outer ring inspection lens 2 is arranged over against the outer ring of the electrode to be detected; the light source subassembly includes coaxial upper and lower interval arrangement's last annular shadowless light source 3 and lower annular shadowless light source 4, and the electrode that awaits measuring is from last annular shadowless light source 3 and the horizontal transmission between the lower annular shadowless light source 4.
Further, the height distance between the incident bottom end surface of the outer ring inspection lens 2 and the incident surface of the electrode to be measured is smaller than the height distance between the annular shadowless light source on the same side as the outer ring inspection lens 2 and the electrode to be measured, and the inclination angle α of the outer ring inspection lens 2 is 10-45 °. Preferably, the inclination angle α of the outer ring of the lens barrel 2 is preferably 20 °.
When the transmitted electrode to be detected cannot be driven to rotate circumferentially, the image acquisition unit adopts a plurality of groups of outer ring inspection cameras 1 and outer ring inspection lenses 2 which are circumferentially and annularly arranged; preferably six groups.
When the transmitted electrode to be detected is driven to rotate in the circumferential direction at the detection position, the image acquisition unit adopts one or more groups of outer ring inspection cameras 1 and outer ring inspection lenses 2 which are circumferentially and annularly arranged. The outer circle inspection camera 1 adopts a black and white camera.
The image acquisition unit comprises a plurality of groups of outer ring inspection cameras 1 and outer ring inspection lenses 2 which are annularly arranged, and the plurality of groups of outer ring inspection cameras 1 and outer ring inspection lenses 2 are switched to an annular hanging plate 6 through a camera lens adjusting and switching piece 5; the upper annular shadowless light source 3 is switched to the lower part of the annular hanging plate 6 through an upper light source adjusting adapter 7.
The image acquisition unit adjusts the spatial position and the inclination angle alpha of the outer ring inspection camera 1 and the outer ring inspection camera 2 through the camera lens adjusting adapter 5. The camera lens adjusting adaptor 5 comprises a plurality of adaptor blocks provided with adjusting grooves, and is L-shaped as a whole.
The height distance from the upper annular shadowless light source 3 to the electrode to be measured is adjusted through the upper light source adjusting adapter 7, the upper light source adjusting adapter 7 comprises two slotted L-shaped plates which are reversely installed, and the whole body is Z-shaped.
Further, a suspension adapter assembly 8 is arranged above the annular suspension plate 6 and is connected with the upper frame in a suspension manner; the lower annular shadowless light source 4 is connected with the lower frame in a supported mode through a bottom light source adapter piece 9 at the bottom.
The annular hanging plate 6 comprises an upper mounting base plate 61 and a lower rotating plate 62 which are coaxially connected and arranged, and the upper annular shadowless light source 3 is connected to the lower rotating plate 62 through an upper light source adjusting adapter 7; a camera lens adjustment adaptor 5 is mounted to the upper mounting substrate 61; the lower part of the suspension adapter assembly 8 passes through the adjustment waist-shaped groove of the upper mounting base plate 61 and is fixed on the lower rotating plate 62.
Further, a wiring board 10 is arranged in the middle of the suspension adapter assembly 8 and used for wiring cables.
Outer ring detection method
An outer ring detection method of the electrode outer ring detection device is disclosed, and referring to fig. 7, the method comprises the following steps:
s1, acquiring an electrode outer ring image through an image acquisition unit;
s2, positioning a crush ROI (region of interest) of the image of the outer ring of the electrode to obtain a crush detection region;
and S3, carrying out gray level binarization processing on the image of the crush detection area to obtain an outer ring crush defect area.
Referring to fig. 8, the image of the OK electrode without flaws is shown in fig. 8a, and the image of the electrode outer ring with pressure damage defects detected by the above method is shown in fig. 8 b.
Electrode comprehensive detection equipment
An electrode comprehensive detection device, referring to fig. 9, the device comprises a feeding module 100, a detection receiving platform 200, detection stations (300, 400, 500, 600, 700), an NG receiving platform 800, an OK discharging module 900, a rack 1000 and an industrial controller (not shown).
Wherein, the feeding module 100 is arranged at the upstream end of the detecting and receiving platform 200; the NG receiving platform 800 and the OK discharging module 900 are arranged at the downstream of the detection receiving platform 200; the detection stations (300, 400, 500, 600, 700) are annularly arranged along the turntable type detection receiving table 200 so as to carry out multi-station comprehensive detection on the battery electrodes flowing through the detection receiving table 200 and classify the detected electrode defects by the industrial controller; the NG material receiving platform 800 is provided with a plurality of defect material boxes and corresponding temporary storage material boxes, and receives electrodes with different defect types according to the detection result of the industrial controller; the OK blanking module 900 receives an OK electrode without defects.
Wherein, the detection station (300, 400, 500, 600, 700) comprises a burr detection module 300, a front detection module 400, a back detection module 500, an outer ring detection module 600 and an inner wall detection module 700 which are arranged according to the streamline of the detection receiving platform 200.
The burr detection module 300 performs burr detection on the electrode. The front detection module 400 detects the appearance defects of the front of the electrode by using coaxial light and low-angle ring light; the back detection module 500 detects the appearance flaws on the back of the electrode by using coaxial light and low-angle ring light; the outer ring detection module 600 adopts the electrode outer ring detection device and obtains an image of a pressure damage defect area of the outer ring of the electrode according to the outer ring detection method; the inner wall detection module 700 is used for detecting flaws on the inner wall of the electrode cylinder.
Storage medium
The present invention also provides a computer readable storage medium having stored thereon computer instructions which, when executed, perform the steps of the aforementioned method. For details, the method is described in the foregoing section, and is not repeated here.
It will be understood by those of ordinary skill in the art that all or a portion of the steps of the various methods of the embodiments described above may be performed by associated hardware as instructed by a program that may be stored on a computer readable storage medium, which may include permanent and non-permanent, removable and non-removable media, that may implement the storage of information by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
Terminal device
The invention also provides a terminal comprising a memory and a processor, wherein the memory is stored with data provider information and computer instructions capable of running on the processor, and the processor executes the computer instructions to execute the steps of the method. For details, the method is described in the foregoing section, and is not repeated here.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an electrode outer lane detection device which characterized in that: the electrode outer ring detection device comprises an image acquisition unit, a light source assembly and an image processor;
the light source assembly provides shadowless light for the electrode to be detected, and the image acquisition unit is arranged on the periphery of the light source assembly and used for acquiring an image of the electrode to be detected, including an outer ring;
the image processor is in telecommunication connection with the image acquisition unit and the light source assembly and is used for controlling image acquisition and image processing and judging whether the outer ring of the electrode has an image area without damage or pressure damage.
2. The electrode outer ring detection device according to claim 1, wherein: the image acquisition unit comprises an outer ring inspection camera (1) and an outer ring inspection lens (2) which are obliquely arranged relative to the electrode to be detected in horizontal transmission, and the light path of the outer ring inspection lens (2) is arranged over against the outer ring of the electrode to be detected; the light source assembly comprises an upper annular shadowless light source (3) and a lower annular shadowless light source (4) which are coaxially arranged up and down at intervals, and the electrode to be measured is horizontally transmitted between the upper annular shadowless light source (3) and the lower annular shadowless light source (4).
3. The electrode outer ring detection device according to claim 2, wherein: the height distance between the incident bottom end surface of the outer ring inspection lens (2) and the incident surface of the electrode to be detected is smaller than the height distance between the annular shadowless light source on the same side as the outer ring inspection lens (2) and the electrode to be detected, and the inclination angle alpha of the outer ring inspection lens (2) is 10-45 degrees;
the inclination angle alpha of the outer circle inspection lens (2) is preferably 20 degrees;
when the transmitted electrode to be detected cannot be driven to rotate circumferentially, the image acquisition unit adopts six groups of outer ring inspection cameras (1) and outer ring inspection lenses (2) which are circumferentially and annularly arranged;
when the transmitted electrode to be detected is driven to rotate in the circumferential direction at the detection position, the image acquisition unit adopts one or more groups of outer ring inspection cameras (1) and outer ring inspection lenses (2) which are circumferentially and annularly arranged; the outer circle inspection camera (1) adopts a black and white camera.
4. The electrode outer ring detection device according to claim 2, wherein: the image acquisition unit comprises a plurality of groups of outer ring inspection cameras (1) and outer ring inspection lenses (2) which are annularly arranged, and the plurality of groups of outer ring inspection cameras (1) and outer ring inspection lenses (2) are switched to an annular hanging plate (6) through a camera lens adjusting and switching piece (5); the upper annular shadowless light source (3) is connected to the lower part of the annular hanging plate (6) through an upper light source adjusting adapter piece (7);
the image acquisition unit adjusts the spatial position and the inclination angle alpha of the outer ring inspection camera (1) and the outer ring inspection camera (2) through the camera lens adjusting adapter (5); the camera lens adjusting adaptor (5) comprises a plurality of adaptor blocks provided with adjusting grooves, and the whole body is L-shaped;
the height distance from the upper annular shadowless light source (3) to the electrode to be measured is adjusted through the upper light source adjusting adapter piece (7), the upper light source adjusting adapter piece (7) comprises two oppositely-installed slotted L-shaped plates, and the whole body is Z-shaped.
5. The electrode outer ring detection device according to claim 4, wherein: a suspension adapter component (8) is arranged above the annular suspension plate (6) and is connected with the upper frame in a suspension way; the lower annular shadowless light source (4) is connected with the lower rack in a supported mode through a bottom light source adapter piece (9) at the bottom.
6. The electrode outer ring detection device according to claim 5, wherein: the annular hanging plate (6) comprises an upper mounting base plate (61) and a lower rotating plate (62) which are coaxially connected and arranged, and the upper annular shadowless light source (3) is connected to the lower rotating plate (62) through an upper light source adjusting adapter (7) in a switching mode; a camera lens adjustment adaptor (5) mounted to the upper mounting substrate (61); the lower part of the suspension adapter component (8) passes through the adjustment waist-shaped groove of the upper mounting base plate (61) and then is fixed on the lower rotating plate (62).
7. The electrode outer ring detection device according to claim 5, wherein: and a wiring board (10) is arranged in the middle of the suspension adapter component (8).
8. An outer ring detection method of the electrode outer ring detection device according to any one of claims 1 to 7, characterized in that the method comprises the following steps:
s1, acquiring an electrode outer ring image through an image acquisition unit;
s2, positioning a crush ROI (region of interest) of the image of the outer ring of the electrode to obtain a crush detection region;
and S3, carrying out gray level binarization processing on the image of the crush detection area to obtain an outer ring crush defect area.
9. An electrode comprehensive testing device is characterized in that: the device comprises a feeding module (100), a detection receiving platform (200), a detection station (300, 400, 500, 600, 700), an NG receiving platform (800), an OK discharging module (900), a rack (1000) and an industrial controller;
the feeding module (100) is arranged at the upstream end of the detection receiving platform (200); the NG material receiving platform (800) and the OK material discharging module (900) are arranged at the downstream of the detection material receiving platform (200);
the detection stations (300, 400, 500, 600, 700) are annularly arranged along the rotary disc type detection receiving table (200) so as to carry out multi-station comprehensive detection on the battery electrodes flowing through the detection receiving table (200), and a controller is used for classifying the detected electrode defects;
the NG material receiving table (800) is provided with a plurality of defect material boxes and corresponding temporary storage material boxes, and receives electrodes with different defect types according to the detection result of the industrial controller;
the OK blanking module (900) receives the flawless OK electrode.
10. The electrode comprehensive detecting apparatus according to claim 9, characterized in that: the detection station (300, 400, 500, 600, 700) comprises a burr detection module (300), a front detection module (400), a back detection module (500), an outer ring detection module (600) and an inner wall detection module (700) which are arranged according to the flow line of the detection receiving platform (200); wherein the content of the first and second substances,
the burr detection module (300) detects burrs of the electrode;
the front detection module (400) detects the appearance defects of the front of the electrode by adopting coaxial light and low-angle annular light;
the back detection module (500) adopts coaxial light and low-angle ring light to detect the appearance flaws of the back of the electrode;
the outer ring detection module (600) adopts the electrode outer ring detection device of any one of claims 1 to 7, and acquires an image of a compression defect area of the outer ring of the electrode according to the outer ring detection method of claim 8;
the inner wall detection module (700) is used for detecting flaws on the inner wall of the electrode cylinder.
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| CN111965192A (en) * | 2020-09-18 | 2020-11-20 | 桂林电子科技大学 | Multi-surface imaging visual detection system and detection method |
| CN112461198A (en) * | 2020-11-10 | 2021-03-09 | 常州沃翌智能科技有限公司 | Device and method for detecting geometric parameters of tunnel section |
| CN112098333A (en) * | 2020-11-17 | 2020-12-18 | 北京领邦智能装备股份公司 | High-precision imaging system and method, image acquisition device and detection equipment |
| CN112903712A (en) * | 2021-01-30 | 2021-06-04 | 苏州科洛尼自动化有限公司 | Combined detection system applying multiple light sources and detection method adopting system |
| CN113560222A (en) * | 2021-08-04 | 2021-10-29 | 湖南易码智能科技有限公司 | Visual inspection equipment for fully automatically identifying appearance defects of capacitor |
| CN114378006A (en) * | 2022-01-11 | 2022-04-22 | 广东国顺隆电子科技有限公司 | Full-automatic checking and testing device for annular piezoresistor |
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Application publication date: 20220805 |