CN109886918A - Wire drawing burr detection method, electronic equipment and the storage medium of lithium battery pole slice - Google Patents
Wire drawing burr detection method, electronic equipment and the storage medium of lithium battery pole slice Download PDFInfo
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- CN109886918A CN109886918A CN201910031529.2A CN201910031529A CN109886918A CN 109886918 A CN109886918 A CN 109886918A CN 201910031529 A CN201910031529 A CN 201910031529A CN 109886918 A CN109886918 A CN 109886918A
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- lithium battery
- battery pole
- burr
- pole slice
- image
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 113
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000005491 wire drawing Methods 0.000 title claims abstract description 34
- 238000003860 storage Methods 0.000 title claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 26
- 230000009885 systemic effect Effects 0.000 claims abstract description 7
- 238000004422 calculation algorithm Methods 0.000 claims description 17
- 238000004590 computer program Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 238000009499 grossing Methods 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims description 4
- 230000000877 morphologic effect Effects 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 241001292396 Cirrhitidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012795 verification 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
Abstract
The invention discloses the wire drawing burr detection methods of lithium battery pole slice, comprising the following steps: image acquisition step: obtaining the two sides image of lithium battery pole slice；Image processing step: image procossing is carried out to the two sides image of lithium battery pole slice, identification obtains pole piece region and background area；Detecting step: handling pole piece region in the two sides image of lithium battery pole slice, and identifies characteristic information of the two sides with the presence or absence of burr and existing burr of pole piece；Judgment step: judge whether current lithium battery pole slice is qualified products according to the specification requirement of the characteristic information of burr and systemic presupposition.The present invention realizes the detection of the wire drawing burr of the both sides of the edge of lithium battery pole slice.The present invention also provides a kind of electronic equipment and storage mediums.
Description
Technical field
The present invention relates to lithium battery pole slice detection more particularly to wire drawing burr detection method, the electricity of a kind of lithium battery pole slice
Sub- equipment and storage medium.
Background technique
Currently, for lithium battery pole slice production after the completion of need to pole piece carry out qualification verifying, such as size detection, lack
Detection etc. is fallen into, however, to ensure that the lithium battery pole slice of production is qualified, it is exactly for lithium battery there are one important detection
The wire drawing burr of pole piece detects, since pole piece is during generating slice, it is easy to generate burr etc., general burr is too long,
When excessive, and when being applied in battery with jagged lithium battery pole slice, it is easy to cause positive and negative anodes short-circuit, cause
Battery catches fire is burnt, and What is more may be to using the user of battery to damage.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide the inspections of the wire drawing burr of lithium battery pole slice
Survey method, be able to solve in the prior art can not to lithium battery pole slice wire drawing burr detection lead to lithium battery pole flake products
There is a problem of security risk etc..
The second object of the present invention is to provide a kind of electronic equipment, and being able to solve in the prior art can not be to lithium electricity
The wire drawing burr detection of pond pole piece causes lithium battery pole flake products to there is a problem of security risk etc..
The third object of the present invention is to provide a kind of computer readable storage medium, be able to solve in the prior art not
Can to lithium battery pole slice wire drawing burr detection cause lithium battery pole flake products to there is a problem of security risk etc..
An object of the present invention adopts the following technical scheme that realization:
The wire drawing burr detection method of lithium battery pole slice, comprising the following steps:
Image acquisition step: the two sides image of lithium battery pole slice is obtained；
Image processing step: gray proces are carried out to the two sides image of lithium battery pole slice, identification obtains pole piece region and back
Scene area；
Detecting step: image procossing is carried out to pole piece region in the two sides image of lithium battery pole slice, and identifies lithium battery pole
Characteristic information of the two sides of piece with the presence or absence of burr and existing burr；
Judgment step: lithium battery pole slice is judged according to the specification requirement of the characteristic information of burr and systemic presupposition
It whether is qualified products.
Further, described image processing step further includes multiple subgraphs that the two sides of lithium battery pole slice are acquired by camera
Picture, and multiple subgraphs are spliced into the two sides image of lithium battery pole slice.
Further, the resolution ratio of the subgraph of the two sides of camera acquisition lithium battery pole slice are as follows: lateral resolution is
0.0098mmpix, longitudinal resolution 0.01mmpix.
Further, the detecting step further includes according to Image binarizing algorithm and Morphological scale-space algorithm to lithium electricity
Pole piece region in the two sides image of pond pole piece carries out processing and obtains the two sides of lithium battery pole slice with the presence or absence of burr and exist
Burr characteristic information.
Further, the characteristic information of the burr includes length, width and the projected area of burr.
It further, further include pre-treatment step before described image obtaining step: to the both sides of the edge of lithium battery pole slice
It carries out smoothing processing, so that the both sides of the edge of lithium battery pole slice are smooth.
The second object of the present invention adopts the following technical scheme that realization:
A kind of electronic equipment can be run on a memory and on a processor including memory, processor and storage
Computer program, the processor realize the drawing of the lithium battery pole slice as used by one of the object of the invention when executing described program
The step of silk burr detection method.
The third object of the present invention adopts the following technical scheme that realization:
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
The step of wire drawing burr detection method of the lithium battery pole slice as used by one of the object of the invention is realized when row.
Compared with prior art, the beneficial effects of the present invention are:
The present invention is acquired image by the both sides of the edge of the lithium battery pole slice after slice, and by image
Reason detects both sides of the edge with the presence or absence of wire drawing burr, and there are the characteristic information of its burr when burr, then root again
According to burr characteristic information and systemic presupposition specification requirement come judge slice after lithium battery pole slice whether be qualified production
Product, and then the lithium battery pole slice that burr can be prevented too long is flowed into market and is made into product, and there are problems that security risk.
Detailed description of the invention
Fig. 1 is the flow chart of the wire drawing burr detection method of lithium battery pole slice provided by the invention；
Fig. 2 is the schematic diagram of wire drawing burr in image provided by the invention；
Fig. 3 is the front and back comparison diagram that image provided by the invention passes through thinning algorithm processing.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
Embodiment one:
In order to which the wire drawing burr to lithium battery pole slice detects, the present invention provides a kind of lithium battery pole slice wire drawing burrs
Detection method is the image for obtaining lithium battery pole slice by setting image acquisition equipment, is then identified by image procossing
Obtain the edge of pole piece and background area in the image of lithium battery pole slice, and identify obtain the edge of pole piece with the presence or absence of burr,
And there are the length of burr, shape, sizes etc., then judge lithium battery according to data such as the length of burr, shape, sizes
Whether pole piece meets the requirements.In actual production process, pole piece is in cutting, it is impossible to accomplish theoretically absolutely not hair
Thorn, can set in systems corresponding threshold value according to actual operating experience, which is such as of length no more than the one of burr
When fixed number value, lithium battery when in use, will not cause damages, in this way when system is judged, so that it may sentence to using
When of length no more than a certain threshold value of disconnected burr, being considered as the lithium battery pole slice is qualified products.
In addition, the detection in order to realize lithium battery pole slice wire drawing burr, the present invention sweeps camera by using 2 sets of 8K lines first
Image is acquired to the surface of pole piece, camera is swept using 2 sets of 4K lines image is acquired to the two sides of pole piece, then passes through this
The lithium battery pole slice wire drawing burr detection method for inventing offer carries out processing to the image of above-mentioned acquisition and obtains lithium battery pole slice
Surface defect, outer dimension etc. carry out fixed point mark for the position that defect, wire drawing etc. are more than specification, and save corresponding figure
Piece and position data.Wherein, line sweeps camera and refers to that triggering camera can only shoot the camera of a line or a few rows every time.It obtains
The complete image of subject, it is necessary to which the direction Sensor for making subject sweep camera perpendicular to line moves, and then will clap
The figure taken the photograph assembles line by line, forms the complete appearance of subject.As shown in Figure 1, the present embodiment provides lithium battery poles
The wire drawing burr detection method of piece, specifically includes the following steps:
Step S1: multiple subgraphs of camera acquisition are obtained, and are spliced into the two sides image of lithium battery pole slice.Due to
The dimensional problem of lithium battery pole slice can not be completely in the coverage area of a camera, therefore be made in actual production
In, image is acquired to lithium battery pole slice by using multiple cameras, then the image of acquisition is carried out to be spliced into lithium electricity
The complete image of pond pole piece.Since the purpose of this device is to detect the wire drawing burr on pole piece both sides, acquired image is
The image of the two sides of lithium battery pole slice.
In addition, the present invention also drives by contacting good encoder pinch roller with pole piece, corresponding coding is sent to camera
The image of acquisition to control the starting of camera to acquire image, and is sent to control host by signal, so that control host
The detection of wire drawing burr is completed according to the image of acquisition.
In addition, in order to improve the testing result of wire drawing burr, the resolution ratio of image is preferred are as follows:
Pixel lateral resolution is 40mm/4096pix=0.0098, and pixel longitudinal resolution is 0.01mmpix, and this hair
Bright middle wire drawing burr detection, which is greater than, to be required to be 0.04mm, is about 4 length in pixels.Therefore, by the pixel longitudinal resolution of image
Rate is 0.01mm/pix, and the verification and measurement ratio of crooked burr can be improved in this way.
In addition, camera is all made of one and same coding device, and wire drawing burr is arranged using frequency multiplication frequency dividing when for acquisition image
Camera trigger signal.Meanwhile when machine operating speed is 50m/min, 1 camera, 1 second data volume is (1s*50m/
60s)/0.01mm/pix*4096=326MB guarantees number due to using CameraLink capture card and grinding magnificent high speed processing platform
According to transmission and processing.
Step S2: gray proces are carried out to the two sides image of lithium battery pole slice, identification obtains pole piece region and background area.
Gray proces are carried out by the two sides image to collected lithium battery pole slice, since different area grayscales is handled
Afterwards, the contrast that shows is different, therefore can distinguish and obtain pole piece and background area, after finding pole piece in this way, can for into
The lookup of one step show that the two sides of pole piece are prepared with the presence or absence of burr.
Step S3: carrying out image procossing to the pole piece region in lithium battery pole slice, to show that the two sides of lithium battery pole slice are
It is no that there are the characteristic information of burr and existing burr.
In addition, detect lithium battery pole slice two sides whether there is burr when, can be by Image binarizing algorithm, morphology at
Adjustment method etc. carries out image procossing to image, to judge the two sides for obtaining lithium battery pole slice with the presence or absence of burr.
When detecting lithium battery pole slice two sides there are when burr, then its characteristic information is obtained by thinning algorithm, it should
Thinning algorithm is the skeletal extraction algorithm of halcon, is existing common image processing algorithm, the present invention is just with the refinement
Algorithm handles image, is not related to the improvement of the algorithm, and the present invention does not do specific introduction.Such as shown in figure 3,
Thinning algorithm image before and after treatment respectively carried out to image, in the image after refinement, the skeleton of burr only has
One pixel is wide, facilitate calculate burr length, shape etc., then can according to burr length, area exposed etc. come
Judge whether the product is qualified products.Wherein, the characteristic information of capillary includes length, width and the perspective plane of burr
Product etc..
In addition, the concrete processing procedure of step S3 is as follows:, can be with to obtaining image as shown in Figure 2 after image procossing
It learns that there are burrs for the pole piece two sides, and then the peripheral portion image interception comprising burr can be come out, according to longitudinal cross
To resolution ratio ratio by weight of 1:1 interpolation, if pixel longitudinal length is 0.01mm, lateral length 0.005mm has
Two kinds of methods are by ratiometric conversion at 1:1 relationship, first is that horizontal pixel length is made to become 0.01mm from 0.005mm, then taking will scheme
The down-sampled method extracted as lateral interlacing；Second is that longitudinal length in pixels is made to become 0.005mm from 0.01mm, then take image
Longitudinal pixel carries out the method for interpolation.After down-sampled or interpolation, image vertical and horizontal ratio becomes 1:1, then calculates
When burr length, it is converted into the number of pixels that need to only calculate its skeleton, i.e. area, it is possible thereby to calculate burr length.Wherein,
Burr projected area is calculated, then is the number of pixels of simple statistics burr areas.
Step S4: current lithium battery is judged according to the specification requirement of the characteristic information of burr and systemic presupposition
Whether pole piece is qualified products.
In addition, for the accuracy of burr detection, the invention also includes step S11 in order to guarantee in image procossing:
Before acquiring image, also the both sides of the edge of lithium battery pole slice are pressed by the flattening device being mounted on burr detection device
Side processing, so that the both sides of the edge of lithium battery pole slice are smooth.It is arranged by the both sides of the edge to lithium battery pole slice, it can
So that the both sides of the edge of lithium battery pole slice is more smooth, some existing burrs are handled, so that the image of shooting is more
Add it is clear so that detection result it is more acurrate.Such as some burrs be infolding, some burrs be it is oblique, if it is to its into
When the both sides of the edge of row lithium battery pole slice carry out smooth processing, testing result inaccuracy may result in.
In addition, can be realized using prior art etc., for example pass through for burr detection device, flattening device etc.
Corresponding pressure roller etc. is set on the lathe of production technology, is not inventive point of the invention, therefore do not do specific introduction here.
Embodiment two:
The present invention also provides a kind of electronic equipment comprising memory, processor and storage are on a memory and can
The computer program run in processing, the processor perform the steps of when executing described program
Image acquisition step: the two sides image of lithium battery pole slice is obtained；
Image processing step: gray proces are carried out to the two sides image of lithium battery pole slice, identification obtains pole piece region and back
Scene area；
Detecting step: image procossing is carried out to pole piece region in the two sides image of lithium battery pole slice, and identifies lithium battery pole
Characteristic information of the two sides of piece with the presence or absence of burr and existing burr；
Judgment step: lithium battery pole slice is judged according to the specification requirement of the characteristic information of burr and systemic presupposition
It whether is qualified products.
Further, described image processing step further includes multiple subgraphs that the two sides of lithium battery pole slice are acquired by camera
Picture, and multiple subgraphs are spliced into the two sides image of lithium battery pole slice.
Further, the resolution ratio of the subgraph of the two sides of camera acquisition lithium battery pole slice are as follows: lateral resolution is
0.0098mmpix, longitudinal resolution 0.01mmpix.
Further, the detecting step further includes according to Image binarizing algorithm and Morphology Algorithm to lithium battery pole slice
Two sides image in pole piece region carry out processing and obtain the two sides of lithium battery pole slice with the presence or absence of burr and existing burr
Characteristic information.
Further, the characteristic information of the burr includes length, width and the projected area of burr.
It further, further include pre-treatment step before described image obtaining step: to the both sides of the edge of lithium battery pole slice
It carries out smoothing processing, so that the both sides of the edge of lithium battery pole slice are smooth.
Embodiment three:
The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, computer program
It is performed the steps of when being executed by processor
Image acquisition step: the two sides image of lithium battery pole slice is obtained；
Image processing step: gray proces are carried out to the two sides image of lithium battery pole slice, identification obtains pole piece region and back
Scene area；
Detecting step: image procossing is carried out to pole piece region in the two sides image of lithium battery pole slice, and identifies lithium battery pole
Characteristic information of the two sides of piece with the presence or absence of burr and existing burr；
Judgment step: lithium battery pole slice is judged according to the specification requirement of the characteristic information of burr and systemic presupposition
It whether is qualified products.
Further, described image processing step further includes multiple subgraphs that the two sides of lithium battery pole slice are acquired by camera
Picture, and multiple subgraphs are spliced into the two sides image of lithium battery pole slice.
Further, the resolution ratio of the subgraph of the two sides of camera acquisition lithium battery pole slice are as follows: lateral resolution is
0.0098mmpix, longitudinal resolution 0.01mmpix.
Further, which is characterized in that the detecting step further includes according to Image binarizing algorithm and Morphology Algorithm
To the pole piece region in the two sides image of lithium battery pole slice carry out processing obtain the two sides of lithium battery pole slice with the presence or absence of burr, with
And the characteristic information of existing burr.
Further, the characteristic information of the burr includes length, width and the projected area of burr.
It further, further include pre-treatment step before described image obtaining step: to the both sides of the edge of lithium battery pole slice
It carries out smoothing processing, so that the both sides of the edge of lithium battery pole slice are smooth.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (8)
1. the wire drawing burr detection method of lithium battery pole slice, which comprises the following steps:
Image acquisition step: the two sides image of lithium battery pole slice is obtained；
Image processing step: gray proces are carried out to the two sides image of lithium battery pole slice, identification obtains pole piece region and background area
Domain；
Detecting step: image procossing is carried out to pole piece region in the two sides image of lithium battery pole slice, and identifies lithium battery pole slice
Characteristic information of the two sides with the presence or absence of burr and existing burr；
Judgment step: whether lithium battery pole slice is judged according to the specification requirement of the characteristic information of burr and systemic presupposition
For qualified products.
2. the wire drawing burr detection method of lithium battery pole slice according to claim 1, which is characterized in that described image processing step
It suddenly further include multiple subgraphs of the two sides of lithium battery pole slice being acquired by camera, and multiple subgraphs are spliced into lithium battery pole
The two sides image of piece.
3. the wire drawing burr detection method of lithium battery pole slice according to claim 2, which is characterized in that camera acquires lithium battery
The resolution ratio of the subgraph of the two sides of pole piece are as follows: lateral resolution 0.0098mmpix, longitudinal resolution 0.01mmpix.
4. the wire drawing burr detection method of lithium battery pole slice according to claim 1, which is characterized in that the detecting step is also
Including according to Image binarizing algorithm and Morphological scale-space algorithm to the pole piece region in the two sides image of lithium battery pole slice into
Row processing obtains characteristic information of the two sides with the presence or absence of burr and existing burr of lithium battery pole slice.
5. the wire drawing burr detection method of lithium battery pole slice according to claim 4, which is characterized in that the feature of the burr
Data information includes length, width and the projected area of burr.
6. the wire drawing burr detection method of lithium battery pole slice according to claim 1, which is characterized in that described image obtains step
Further include pre-treatment step before rapid: the both sides of the edge of lithium battery pole slice being carried out smoothing processing, so that the two of lithium battery pole slice
Side edge is smooth.
7. a kind of electronic equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, it is characterised in that: the processor realizes the lithium electricity as described in any one of claim 1-6 when executing described program
The step of wire drawing burr detection method of pond pole piece.
8. a kind of computer readable storage medium, is stored thereon with computer program, it is characterised in that: the computer program quilt
It is realized when processor executes as described in any one of claim 1-6 the step of the wire drawing burr detection method of lithium battery pole slice.
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| CN201910031529.2A CN109886918A (en) | 2019-01-14 | 2019-01-14 | Wire drawing burr detection method, electronic equipment and the storage medium of lithium battery pole slice |
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Cited By (8)
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| CN110706215A (en) * | 2019-09-26 | 2020-01-17 | 无锡先导智能装备股份有限公司 | Pole piece detection method |
| CN110954554A (en) * | 2019-12-16 | 2020-04-03 | 广州量子激光智能装备有限公司 | Online burr detecting system |
| CN110987959A (en) * | 2019-12-16 | 2020-04-10 | 广州量子激光智能装备有限公司 | Online burr detection method |
| CN111967546A (en) * | 2020-06-30 | 2020-11-20 | 广州超音速自动化科技股份有限公司 | Lithium battery test data binding method, device and storage medium |
| CN113313713A (en) * | 2021-08-02 | 2021-08-27 | 南京帝感智能科技有限公司 | Method and system for online detection of burrs of lithium battery pole piece |
| CN114764804A (en) * | 2022-06-16 | 2022-07-19 | 深圳新视智科技术有限公司 | Lithium battery pole piece defect detection method, device, equipment and storage medium |
| CN115841445A (en) * | 2022-04-18 | 2023-03-24 | 宁德时代新能源科技股份有限公司 | Method, device and system for detecting cathode pole piece of composite material belt |
| WO2023202234A1 (en) * | 2022-04-18 | 2023-10-26 | 宁德时代新能源科技股份有限公司 | Method, apparatus and system for performing defect detection on cathode piece of composite material belt |
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| CN114764804A (en) * | 2022-06-16 | 2022-07-19 | 深圳新视智科技术有限公司 | Lithium battery pole piece defect detection method, device, equipment and storage medium |
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