CN110470217A - The detection method of battery core ending state - Google Patents
The detection method of battery core ending state Download PDFInfo
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- CN110470217A CN110470217A CN201910736502.3A CN201910736502A CN110470217A CN 110470217 A CN110470217 A CN 110470217A CN 201910736502 A CN201910736502 A CN 201910736502A CN 110470217 A CN110470217 A CN 110470217A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
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Abstract
The application provides a kind of detection method of battery core ending state, and for detecting to being located at battery core on volume needle, the detection method includes: the image for obtaining the battery core on volume needle；The data of battery core are obtained according to described image；Judge whether the data of battery core are located in preset range；It is bad that battery core ending is determined whether there is according to judging result.The detection method of the battery core ending state of the application, the detection of ending state is carried out after the completion of electric core winding, it can detect in time bad to allow the operator to be intervened in time, it is bad to avoid the occurrence of batch, in addition, more simple and timely and effective by X-ray detection or dismantling battery core detection, detection process relative to the later period, be conducive to improve yield, prevent missing inspection, to improve product quality.
Description
Technical field
This application involves battery manufacturing field more particularly to a kind of detection methods of battery core ending state.
Background technique
The current method for not detecting battery core ending state effectively in the industry, the no-station pole canopy after cutting off inaccuracy, cutting off that finishes up,
The battery core size that the problems such as positive/negative plate off-position is inconsistent is likely to result in ending is bad.It is overturn in the volume needle of up- coiler
Afterwards, before battery core leaves volume needle, existing detection system not can be carried out effective detection, and the later period can only be examined by X-ray
It surveys or is detected after battery core dismantling, and can not achieve on-line checking, bad problem cannot be intervened in time, be easy to make
It is bad at battery core batch, so that finished battery yield substantially reduces.
Summary of the invention
The application provides a kind of detection method of battery core ending state.
The application provides a kind of detection method of battery core ending state, for being detected to the battery core being located on volume needle,
The detection method includes: the image for obtaining the battery core on volume needle；
The data of battery core are obtained according to described image；Judge whether the data of battery core are located in preset range；According to judgement
As a result it is bad to determine whether there is battery core ending.
Further, according to described image, the data of battery core are obtained, comprising: judge the classification of described image；According to image
Classification, obtain the data of battery core；Wherein, described image includes battery core direct picture and battery core verso images.
Further, judge the classification of described image, comprising: first image for recording acquisition is the first image；Record obtains
Second image got is the second image；Wherein, one in the first image and the second image is battery core direct picture,
Another is battery core verso images.
Further, judge the classification of described image, comprising: judge in described image with the presence or absence of line of demarcation；Work as image
In there are when line of demarcation, determine described image be battery core direct picture；When line of demarcation is not present in image, described image is determined
For battery core verso images；Wherein, the line of demarcation extends along the length direction of described image.
Further, judge in described image with the presence or absence of line of demarcation, comprising: obtain the regional area in image；Judgement
It whether there is line of demarcation in regional area；Wherein, the width of regional area is greater than the half of the width of image.
Further, judge the classification of described image, comprising: the first detection zone and the second inspection are chosen in described image
Survey region；Obtain the difference of the brightness of first detection zone and the brightness of the second detection zone；When the difference is greater than in advance
If when threshold value, determining that described image is battery core direct picture；When the difference is less than preset threshold, determine described image for electricity
Core verso images；Wherein the first detection zone and the second detection zone are located at the two sides of the center line of described image, described
Centerline parallel is in the length direction of described image.
Further, the battery core includes positive plate, negative electrode tab and the diaphragm between positive plate and negative electrode tab；It is described
The data of battery core include the edge and anode of first distance between the edge of the diaphragm and the edge of negative electrode tab, the diaphragm
The third distance between the edge of second distance and positive plate and the edge of negative electrode tab between the edge of piece, wherein the edge
For the boundary line of the length direction perpendicular to image.
Further, the battery core direct picture includes along the first area and second perpendicular to length direction arrangement
Region, the first area include the edge of the first diaphragm and the edge of the positive plate, the second area include second every
The edge of the edge at the edge of film and the negative electrode tab, the edge of first diaphragm and the second diaphragm it is conllinear and formed it is described every
The edge of film；Obtain the data of battery core, comprising: when described image is battery core direct picture, obtain the edge of the negative electrode tab
The edge of the edge of the first coordinate, the positive plate in the longitudinal direction the second coordinate in the longitudinal direction, the diaphragm
Third coordinate in the longitudinal direction；The first distance, the are calculated according to first coordinate, the second coordinate and third coordinate
Two distances and third distance；Wherein, the third coordinate is the coordinate at the edge of first diaphragm or the edge of the second diaphragm
Coordinate.
Further, the first coordinate of the edge of positive plate in the longitudinal direction is obtained, comprising: obtain the positive plate
The subcoordinate of multiple points on edge；The average value for calculating multiple subcoordinates, as first coordinate.
Further, the battery core verso images include the side at the edge of the diaphragm, the edge of positive plate and negative electrode tab
Edge obtains the data of battery core, comprising: when described image is battery core verso images, obtains the edge of negative electrode tab in length direction
On the first coordinate, edge the second coordinate in the longitudinal direction of positive plate, diaphragm edge third in the longitudinal direction
Coordinate；The first distance, second distance and third distance are calculated according to first coordinate, the second coordinate and third coordinate.
The detection method of the battery core ending state of the application, carries out the detection of ending state after the completion of electric core winding,
Can detect in time it is bad to allow the operator to be intervened in time, avoid the occurrence of batch it is bad, in addition, relative to the later period
By X-ray detection or dismantling battery core detection, detection process is more simple and timely and effective, is conducive to improve yield, prevent
Missing inspection, to improve product quality.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of battery core of the application.
Fig. 2 is the flow diagram of the detection method of the application battery core ending state.
Fig. 3 is the schematic diagram of the application battery core direct picture.
Fig. 4 is the schematic diagram of the application battery core verso images.
Fig. 5 is the flow diagram of the one embodiment for the classification that the application judges image.
Fig. 6 is the flow diagram of another embodiment of the classification that the application judges image.
Fig. 7 is the flow diagram of another embodiment of the classification that the application judges image.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device of some aspects be described in detail in claims, the application.
It is only to be not intended to be limiting the application merely for for the purpose of describing particular embodiments in term used in this application.
Unless otherwise defined, technical term or scientific term used in this application, which are should be in fields of the present invention, has general skill
The ordinary meaning that the personage of energy is understood." first " " second " and class used in present specification and claims
As word be not offered as any sequence, quantity or importance, and be used only to distinguish different component parts.Equally, " one
It is a " or the similar word such as " one " do not indicate that quantity limits yet, but indicate that there are at least one." multiple " or " several " table
Show two and two or more.Unless otherwise noted, the similar word such as " front ", " rear portion ", " lower part " and/or " top " is only
Convenient for explanation, and it is not limited to a position or a kind of spatial orientation.The similar word such as " comprising " or "comprising" means
It appears in element or object before " comprising " or "comprising" and covers and appear in " comprising " or "comprising" presented hereinafter
Element or object and its equivalent, it is not excluded that other elements or object.The similar word such as " connection " or " connected " is simultaneously
Non-limiting and may include electrical connection in physics or mechanical connection, either direct or indirectly.In
Present specification and the "an" of singular used in the attached claims, " described " and "the" be also intended to including
Most forms, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to
It and include that one or more associated any or all of project listed may combine.
Referring to shown in Fig. 1 to Fig. 7, the application provides a kind of detection method of battery core ending state, the detection method packet
It includes: obtaining the image of the battery core on volume needle；The data of battery core are obtained according to described image；It is pre- to judge whether the data of battery core are located at
If in range；It is bad that battery core ending is determined whether there is according to judging result.
Incorporated by reference to Fig. 1, the battery core of this implementation is the battery core of flat battery comprising positive plate 1, negative electrode tab 2 and is located at just
Diaphragm 3 between pole piece and negative electrode tab, positive plate 1, diaphragm 3, negative electrode tab 2, diaphragm 4 stack gradually, and diaphragm 3 is for guaranteeing anode
Piece 1 and negative electrode tab 2 are insulated from each other.In the present embodiment, the brightness of diaphragm 3, negative electrode tab 2, positive plate 1 is sequentially reduced (grey in other words
Degree is sequentially increased), difference in brightness of the application based on three obtains the data of battery core, to judge battery core with the presence or absence of ending
It is bad.Certainly, battery core further includes anode ear, negative electrode lug, not shown in Fig. 1.
Incorporated by reference to Fig. 4, the detection method of the battery core ending state of the present embodiment includes:
Step S1: the image of the battery core on volume needle is obtained.
Optionally, after the completion of electric core winding and when not leaving the volume needle of up- coiler, battery core is obtained by camera system
Image, subsequent image recognition and processing are then handled by processing system.
Step S2: according to described image, the data of battery core are obtained.
For the battery core of flat battery, what camera system was got may be the positive image of battery core, it is also possible to
The image of battery core reverse side, that is, described image includes battery core direct picture and battery core verso images.Please refer to Fig. 2 and Fig. 3, battery core
The image of front and back sides is not identical, and battery core direct picture includes that the line of demarcation of a length direction X extension along image (is actually to cut
Broken string), line of demarcation two sides are respectively compared with the positive plate 1 of low-light level and the negative electrode tab 2 of intermediate light, and battery core verso images do not have then
There is such line of demarcation.In addition, battery core direct picture and battery core verso images all show positive plate 1, negative electrode tab 2,3 edge of diaphragm
The boundary line that width direction Y extends.Therefore the classification for needing to first determine whether described image obtains electricity further according to the classification of image
The data of core.For cylindrical battery, battery core is cylindrical, therefore the visible face of battery core can be regarded as battery core front, electricity
The sightless another side of core is battery core reverse side.
Incorporated by reference to Fig. 5, in one embodiment, the classification of image is judged, comprising:
Sub-step S211: first image for recording acquisition is the first image.
Sub-step S212: second image for recording acquisition is the second image.
First image is battery core direct picture or battery core verso images, and the second image corresponds to battery core verso images or battery core
Direct picture.It is understood that the classification of a wherein image has been determined, the classification of another image also determines therewith.
Incorporated by reference to Fig. 6: in another embodiment, judging the classification of image, comprising:
Sub-step S221: judge in described image with the presence or absence of line of demarcation.
Optionally, sub-step S221 further comprises: obtain the regional area L in image, judge in regional area L whether
There are lines of demarcation, wherein the width of regional area L is greater than the half of the width of image.
In the present embodiment, the width ratio of positive panel region and cathode panel region is close to 1, due to the width of regional area
Greater than the half of the width of image, therefore it can guarantee that regional area necessarily includes line of demarcation (if image is battery core direct picture).
In other embodiments, different from the ratio of cathode panel region according to the positive positive panel region of battery core, can also suitably it reduce
Or increase the width of regional area L.The width of image can be understood as the size of image in the Y direction, and the length of image is then
The size of image in the X direction.
Sub-step S222: when there are when line of demarcation, determine that described image is battery core direct picture in image；When in image not
There are when line of demarcation, determine that described image is battery core verso images.
Incorporated by reference to Fig. 7, In yet another embodiment, the classification of image is judged, comprising:
S231: the first detection zone M and the second detection zone N are chosen in described image.
Wherein the first detection zone M and the second detection zone N is located at the two sides of the center line of described image, it is described in
Heart line is parallel to the length direction of image, and center line can be determined according to image recognition approximation.
S232: the difference of the brightness of the first detection zone M and the brightness of the second detection zone N is obtained.
Optionally, processing system obtains brightness and the second detection zone N of the first detection zone M according to image respectively
Brightness, and carry out asking poor calculating.
S233: when the difference is greater than preset threshold, determine that described image is battery core direct picture；When the difference is small
When preset threshold, determine that described image is battery core verso images.
If the respectively positive panel region of the first detection zone M and the second detection zone N and cathode panel region, due to anode
There are luminance differences for piece and negative electrode tab, thus difference is a relatively large numerical value；If the detection of the first detection zone M and second
Region N is positive panel region, then difference is 0 or (may be since there are small colors for detection error or material itself close to 0
Difference).Preset threshold is one close to 0 value, and specific value can measure according to experiment.
The battery core direct picture include in the width direction Y (perpendicular to the length direction X) arrangement first area A and
Second area B (when image is battery core direct picture, the first detection zone M is a part of first area A, described the
Two detection zones are a part of second area B), part positive plate 1 and the first diaphragm 31 is presented in the first area A, thus
Part negative electrode tab 2 and the second diaphragm is presented in the edge at edge and the positive plate including the first diaphragm, the second area B
32, thus the edge at the edge including the second diaphragm and the negative electrode tab, the edge of first diaphragm and the side of the second diaphragm
Edge is conllinear and forms the edge of diaphragm.
Optionally, the data of the battery core include the side of the first distance a at the edge of diaphragm and the edge of negative electrode tab, diaphragm
The third distance c at the edge at the edge and negative electrode tab of the second distance b and positive plate at the edge of edge and positive plate, wherein the side
Edge is the boundary line perpendicular to the length direction of image, and in the present embodiment, edge is the boundary line on the left of image；In other implementations
In example, it is also possible to the boundary line on right side.
Optionally, by image on length direction X coordinatograph.When described image is battery core direct picture, cathode is obtained
The edge of piece the first coordinate x1 in the longitudinal direction, edge the second coordinate x2 in the longitudinal direction of positive plate, diaphragm
The third coordinate x3 of edge in the longitudinal direction calculates institute according to the first coordinate x1, the second coordinate x2 and third coordinate x3
First distance a, second distance b and third distance c are stated, obtains first distance a=| x1-x3 |, second distance b=| x2-x3 |, the
Three distance c=| x1-x2 |, wherein the edge is each element in the boundary line of the length direction perpendicular to image, the third
Coordinate x3 can be the coordinate at the edge of the first diaphragm, be also possible to the coordinate at the edge of the second diaphragm.Due to the side of positive plate
The edge of edge, the edge of negative electrode tab and diaphragm extends along Y-direction, therefore the first coordinate, the second coordinate, third coordinate can be managed
Solution is the abscissa of any point on the edge, the edge of negative electrode tab and the edge of diaphragm of positive plate.
By taking the first coordinate as an example, the subcoordinate of multiple points on the edge of the available positive plate；Calculate multiple sons
The average value of coordinate, average value is as first coordinate.Relative to only taking for a point, the average value of multiple points more can generation
The edge of table positive plate, therefore there is higher reference value, be conducive to improve detection accuracy.Similar, the second coordinate, third
Coordinate can also obtain by a similar method.
When described image is battery core verso images, obtain the edge of negative electrode tab the first coordinate x1 in the longitudinal direction,
The edge third coordinate x3 in the longitudinal direction of the edge of positive plate the second coordinate x2 in the longitudinal direction, diaphragm；According to
The first coordinate x1, the second coordinate x2 and third coordinate x3 calculate the first distance a, second distance b and third distance c,
Obtain first distance a=| x1-x3 |, second distance b=| x2-x3 |, third distance c=| x1-x2 |.
Step S3: judge whether the data of battery core are located in preset range.
In one embodiment, judge that the first distance a, second distance b, third distance c in some face of battery core are located at
In corresponding preset range；In another embodiment, can also both judge battery core direct picture first distance a, second away from
Whether have from b, third distance c positioned at corresponding preset range, and judges first distance a, the second distance of battery core verso images
B, whether third distance c is located at corresponding preset range；In other embodiments, also other parameters of available battery core, example
Length, the length of negative electrode tab, the length of diaphragm of such as positive plate, length here each mean the ruler on the X of image length direction
It is very little.
Step S4: it is bad that battery core ending is determined whether there is according to judging result.
Optionally, if first distance a, second distance b, third distance c are respectively positioned in corresponding preset range, then it is assumed that receive
Tail is qualified；Conversely, if any of first distance a, second distance b, third distance c are located at except corresponding preset range,
It can determine that there are battery core ending is bad.
Battery core ending is bad if it exists, then can issue alarm by the PLC system communicated to connect with image detecting system
At least one of prompt, such as the prompt of optical cue, acoustics.Operator can carry out manual intervention, certain closed loop feedback in time
System can also carry out closed loop adjusting according to warning note.
The detection method of the battery core ending state of the application, carries out the detection of ending state after the completion of electric core winding,
Can detect in time it is bad to allow the operator to be intervened in time, avoid the occurrence of batch it is bad, in addition, relative to the later period
By X-ray detection or dismantling battery core detection, detection process is more simple and timely and effective, and for visual inspection, detection is more
Quick and precisely, so that battery core production process is in more good controllable state, to be conducive to improve yield, preventing missing inspection, from
And improve product quality.
The above is only the preferred embodiment of the application, not does limitation in any form to the application, though
Right the application has been disclosed in a preferred embodiment above, however is not limited to the application, any technology people for being familiar with this profession
Member, in the range of not departing from technical scheme, when the technology contents using the disclosure above are modified or are repaired
Decorations are the equivalent embodiment of equivalent variations, but all contents without departing from technical scheme, the technology according to the application are real
Matter any simple modification, equivalent change and modification to the above embodiments, still fall within the range of technical scheme
It is interior.
Claims (10)
1. a kind of detection method of battery core ending state, for being detected to the battery core being located on volume needle, which is characterized in that institute
Stating detection method includes:
Obtain the image of the battery core on volume needle；
The data of battery core are obtained according to described image；
Judge whether the data of battery core are located in preset range；
It is bad that battery core ending is determined whether there is according to judging result.
2. detection method according to claim 1, which is characterized in that according to described image, obtain the data of battery core, wrap
It includes:
Judge the classification of described image；
According to the classification of image, the data of battery core are obtained；
Wherein, described image includes battery core direct picture and battery core verso images.
3. detection method according to claim 2, which is characterized in that judge the classification of described image, comprising:
The first image that record obtains is the first image；
Recording second image got is the second image；
Wherein, one in the first image and the second image is battery core direct picture, another is battery core verso images.
4. detection method according to claim 2, which is characterized in that judge the classification of described image, comprising: described in judgement
It whether there is line of demarcation in image；
When there are when line of demarcation, determine that described image is battery core direct picture in image；When line of demarcation is not present in image, really
Determining described image is battery core verso images；
Wherein, the line of demarcation extends along the length direction of described image.
5. detection method according to claim 4, which is characterized in that judge in described image with the presence or absence of line of demarcation, packet
It includes:
Obtain the regional area in image；
Judge in regional area with the presence or absence of line of demarcation；
Wherein, the width of regional area is greater than the half of the width of image.
6. detection method according to claim 2, which is characterized in that judge the classification of described image, comprising:
The first detection zone and the second detection zone are chosen in described image；
Obtain the difference of the brightness of first detection zone and the brightness of the second detection zone；
When the difference is greater than preset threshold, determine that described image is battery core direct picture；When the difference is less than default threshold
When value, determine that described image is battery core verso images；
Wherein the first detection zone and the second detection zone are located at the two sides of the center line of described image, and the center line is flat
Row is in the length direction of described image.
7. detection method according to claim 2, which is characterized in that the battery core includes positive plate, negative electrode tab and is located at
Diaphragm between positive plate and negative electrode tab；
The data of the battery core include the side of first distance between the edge of the diaphragm and the edge of negative electrode tab, the diaphragm
The third distance between the edge of second distance and positive plate and the edge of negative electrode tab between edge and the edge of positive plate, wherein
The edge is the boundary line perpendicular to the length direction of image.
8. detection method according to claim 7, which is characterized in that the battery core direct picture includes along perpendicular to described
The first area and second area, the first area of length direction arrangement include the edge and the positive plate of the first diaphragm
Edge, the second area include the edge of the second diaphragm and the edge of the negative electrode tab, the edge of first diaphragm and
The edge of two diaphragms is conllinear and forms the edge of the diaphragm；
Obtain the data of battery core, comprising:
When described image is battery core direct picture, the edge of the negative electrode tab the first coordinate in the longitudinal direction, institute are obtained
State the edge third coordinate in the longitudinal direction of the edge of positive plate the second coordinate in the longitudinal direction, the diaphragm；
The first distance, second distance and third distance are calculated according to first coordinate, the second coordinate and third coordinate；
Wherein, the third coordinate is the coordinate of the coordinate at the edge of first diaphragm or the edge of the second diaphragm.
9. detection method according to claim 8, which is characterized in that obtain of the edge of positive plate in the longitudinal direction
One coordinate, comprising:
Obtain the subcoordinate of multiple points on the edge of the positive plate；
The average value for calculating multiple subcoordinates, as first coordinate.
10. detection method according to claim 8, which is characterized in that the battery core verso images include the diaphragm
The edge at edge, the edge of positive plate and negative electrode tab,
Obtain the data of battery core, comprising:
When described image is battery core verso images, the first coordinate, the positive plate of the edge of negative electrode tab in the longitudinal direction are obtained
Edge the second coordinate in the longitudinal direction, diaphragm edge third coordinate in the longitudinal direction；
The first distance, second distance and third distance are calculated according to first coordinate, the second coordinate and third coordinate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117589792A (en) * | 2024-01-18 | 2024-02-23 | 江苏时代新能源科技有限公司 | Ending position detection method, ending position detection device, computer equipment and storage medium |
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