CN114705140A - Full-tab battery cell winding detection method, equipment and medium - Google Patents
Full-tab battery cell winding detection method, equipment and medium Download PDFInfo
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- 238000004804 winding Methods 0.000 title claims abstract description 85
- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 230000037303 wrinkles Effects 0.000 claims abstract description 33
- 230000001678 irradiating effect Effects 0.000 claims abstract description 9
- 238000003860 storage Methods 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 6
- 238000003062 neural network model Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000012549 training Methods 0.000 claims description 6
- 230000002950 deficient Effects 0.000 claims description 3
- 238000010801 machine learning Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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- 238000003466 welding Methods 0.000 description 1
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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
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B11/272—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes using photoelectric detection means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N20/00—Machine learning
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention relates to the field of battery manufacturing, and particularly discloses a full-lug battery cell winding detection method, equipment and a medium, wherein the method comprises the steps of irradiating the front surface of a battery cell winding by a first light source, irradiating a positive lug of the battery cell winding from one side by a second light source, and irradiating a negative lug of the battery cell winding from the other side by a third light source; respectively shooting a battery cell winding, a positive electrode lug and a negative electrode lug through a three-mesa array camera, and respectively obtaining winding video data, positive electrode lug video data and negative electrode lug video data; constructing a detection model through an image recognition algorithm; and obtaining and outputting a cell winding detection result through the detection model. The invention detects whether the battery core winding has the problems of wrinkles and dislocation through the image recognition algorithm, thereby detecting the production quality of the battery core winding in real time in the battery core winding process, reducing the resource waste caused by the problem that the battery core winding enters the subsequent production process of the battery, and improving the production efficiency and the yield of the battery.
Description
Technical Field
The invention relates to the field of battery manufacturing, in particular to a full-tab battery cell winding detection method, full-tab battery cell winding detection equipment and a full-tab battery cell winding detection medium.
Background
With the development of electronic technology and the vigorous popularization of new energy industry, the production and manufacturing of lithium batteries gradually become the center of gravity of manufacturing industry and the leading position of technical development. The lithium battery generally has two shapes, namely a cylindrical shape and a square shape, the inside of the lithium battery generally adopts a spiral winding structure, and the lithium battery is formed by spacing a polyethylene film isolating material which is very fine and has strong permeability between a positive electrode and a negative electrode. The positive electrode comprises a current collector consisting of lithium cobaltate (or lithium nickel cobalt manganese oxide, lithium manganate, lithium iron phosphate and the like) and an aluminum foil, the negative electrode consists of a current collector consisting of a graphitized carbon material and a copper foil, and the battery is filled with an organic electrolyte solution.
However, in the discharging process of the battery, the current is collected through the copper foil and the aluminum foil and is led out to an external circuit through the tab, and due to the existence of the resistor, the battery can generate obvious ohmic heat in the charging and discharging processes, particularly in the large-current charging and discharging processes, so that the temperature of the battery is increased, a large temperature gradient in the battery can cause the inconsistency of the side reaction speed and the current density distribution, and the performance and the attenuation speed of the battery are further influenced. The quantity and the position distribution of the lugs can obviously influence the current distribution and the temperature rise in the battery, and the design of the full lugs can effectively reduce the local current density, so that the positive feedback of the temperature and the current is reduced, and the heat production rate of the full lug battery is two orders of magnitude lower than that of a single lug battery.
However, the design of full utmost point ear battery makes the manufacturing of battery for a difficult problem, compare traditional unipolar ear electricity core, utmost point ear in the full utmost point ear electricity core is many, and vertical distribution, fold and dislocation phenomenon appear more easily in the coiling process that makes full utmost point ear electricity core, and the follow-up utmost point ear welding of full utmost point ear electricity core all has higher requirement to the roughness and the alignment degree of utmost point ear with the equipment, the unfair yield and the reduction of battery quality that can lead to the battery in middle diaphragm fold and inside and outside both ends, increase the risk of battery deflagration. The existing full-lug battery cell winding production line is lack of process detection, whether folds exist in the high-speed winding process or not is difficult to manually check, the winding process yield and the production efficiency are difficult to improve, and the development of battery enterprises is greatly restricted.
Disclosure of Invention
In order to solve the problems of the existing full-tab battery, the invention provides a full-tab battery cell winding detection method, equipment and medium, and the alignment degree between positive and negative pole pieces and a diaphragm is detected in real time on a winding machine.
The invention provides a full-tab battery cell winding detection method, which comprises the following steps:
irradiating the front side of the battery cell winding by a first light source, irradiating a positive electrode lug of the battery cell winding from one side by a second light source, and irradiating a negative electrode lug of the battery cell winding from the other side by a third light source;
respectively shooting a battery cell winding, a positive electrode lug and a negative electrode lug through a three-mesa array camera, and respectively obtaining winding video data, positive electrode lug video data and negative electrode lug video data;
constructing a detection model through an image recognition algorithm;
obtaining a wrinkle detection result according to the winding video data through a detection model;
obtaining a positive tab alignment result according to the positive tab video data through the detection model;
obtaining a negative ear alignment result according to the negative ear video data through the detection model;
and obtaining and outputting a cell winding detection result according to the wrinkle detection result, the positive tab alignment result and the negative tab alignment result, wherein the cell winding detection result comprises qualification or disqualification.
Preferably, the constructing the detection model through the image recognition algorithm specifically includes:
respectively collecting a sample of winding video data, a sample of positive electrode tab video data and a sample of negative electrode tab video data, and constructing the samples into a training set and a test set;
and constructing a neural network model through a machine learning algorithm, and performing iterative optimization on the neural network model through the training set and the testing set to obtain a detection model.
Preferably, the method further comprises the following steps:
and winding the battery cell with unqualified battery cell winding detection result, and sending the battery cell into a defective product cache region through a mechanical arm.
The invention also provides a full-tab battery cell winding detection device, which is used for shooting a wrinkle shooting area positioned in the middle of a battery cell winding coil, a positive tab shooting area positioned on one side of the battery cell winding coil and a negative tab shooting area positioned on the other side of the battery cell winding coil, and comprises: the system comprises a control terminal, a fixing frame, a first light source, a second light source, a third light source and a three-mesa array camera;
the first light source is arranged above the wrinkle shooting area and is opposite to the wrinkle shooting area;
the second light source is arranged above the positive lug shooting area and is opposite to the positive lug shooting area;
the third light source is arranged above the side of the negative electrode tab shooting area and is opposite to the negative electrode tab shooting area;
the three area-array cameras respectively face the wrinkle shooting area, the positive tab shooting area and the negative tab shooting area;
the three area-array cameras, the first light source, the second light source and the third light source are fixedly connected with the fixing frame, and the fixing frame is fixedly connected with the ground;
the three area-array cameras, the first light source, the second light source and the third light source are all electrically connected with the control terminal, and the control terminal is used for realizing the full-tab electric core winding detection method according to any one of claims 1 to 3.
Preferably, the horizontal distance between the first light source and the wrinkle shooting area is 150 +/-10 mm, and the longitudinal distance between the first light source and the wrinkle shooting area is 30 +/-10 mm;
the horizontal distance between the second light source and the positive tab shooting area is 50 +/-10 mm, the longitudinal distance between the second light source and the positive tab shooting area is 50 +/-10 mm, and the inclination angle of the second light source ranges from 30 degrees to 45 degrees;
the horizontal distance between the third light source and the negative electrode tab shooting area is 50 +/-10 mm, the longitudinal distance between the third light source and the negative electrode tab shooting area is 50 +/-10 mm, and the inclination angle of the third light source ranges from 30 degrees to 45 degrees.
Preferably, the working distance between the area-array camera and the wrinkle shooting area, the positive electrode tab shooting area or the negative electrode tab shooting area is 252 +/-5 mm.
The invention provides a computer-readable storage medium, which comprises a stored computer program, wherein when the computer program runs, the equipment where the computer-readable storage medium is located is controlled to execute the full-tab electric core winding detection method.
The invention has the beneficial effects that:
the battery core is shot respectively through the three-table-top array camera and is wound with a roll, the positive pole lug and the negative pole lug, and whether the problem of wrinkles and dislocation exists in the winding of the battery core is detected through an image recognition algorithm, so that the production quality of the winding of the battery core can be detected in real time in the winding process of the battery core, the subsequent production process that the problematic battery core enters the battery in the winding mode is reduced, the resource waste is caused, and the production efficiency and the yield of the battery are improved.
Drawings
The invention will be further described with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of a method according to one embodiment of the present invention;
fig. 2 is a side view of a full-tab cell winding detection apparatus according to an embodiment of the present invention;
fig. 3 is a front view of a full tab battery cell winding detection apparatus according to an embodiment of the present invention.
In the figure: 1. coiling a needle; 2. winding the battery core; 3. a positive plate; 4. a negative plate; 5. a diaphragm; 6. a first light source; 7. a second light source; 8. a third light source; 9. an area-array camera; 10. a positive electrode tab; 11. a negative electrode tab; 12. a wrinkle shooting area; 13. a positive tab shooting area; 14. and a negative tab shooting area.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to fig. 3, as one implementation of the present invention, this embodiment aims to detect, in real time, the alignment between the positive electrode sheet 3 and the negative electrode sheet 4 and the separator 5 when the winding needle 1 winds the electrical core around the winding 2, and the visual pixel single quantity: 0.03mm/pixel, the winding linear speed is more than or equal to 2m/s, and the diameter of the battery cell is 60 mm; the embodiment discloses a full-tab battery cell winding detection method, which comprises the following steps:
s1, the front surface of the electrical core coil 2 is irradiated by the first light source 6, the positive electrode tab 10 of the electrical core coil 2 is irradiated from one side by the second light source 7, and the negative electrode tab 11 of the electrical core coil 2 is irradiated from the other side by the third light source 8;
s2, respectively shooting the battery cell winding 2, the positive electrode tab 10 and the negative electrode tab 11 through the three-mesa array camera 9, and respectively obtaining winding video data, positive electrode tab video data and negative electrode tab video data;
s3, constructing a detection model through an image recognition algorithm;
s31, obtaining a fold detection result according to the winding video data through the detection model; wherein the wrinkle detection result comprises no wrinkle or a wrinkle exceeding a threshold;
s32, obtaining an anode tab alignment result according to the anode tab video data through the detection model; wherein the alignment result of the positive lug comprises alignment or defect;
s33, obtaining a negative electrode tab alignment result according to the negative electrode tab video data through the detection model; wherein the negative tab alignment result comprises alignment or defect existence;
and S4, obtaining and outputting a battery cell winding detection result according to the wrinkle detection result, the positive tab alignment result and the negative tab alignment result, wherein the battery cell winding detection result comprises a qualified result or an unqualified result.
Preferably, the constructing the detection model through the image recognition algorithm specifically includes:
s311, respectively collecting a winding video data sample, a positive electrode tab video data sample and a negative electrode tab video data sample, and constructing the samples into a training set and a test set;
s312, a neural network model is built through a machine learning algorithm, iterative optimization is carried out on the neural network model through the training set and the testing set, and a detection model is obtained.
Preferably, the method further comprises the steps of:
and S5, winding the unqualified battery core with the battery core winding detection result into a winding coil 2, and sending the winding coil into a defective cache region through a mechanical arm.
The three-table-top array camera 9 is used for respectively shooting the battery core wound by the winding needle 1 to wind the coil 2, the anode tab 10 and the cathode tab 11, and detecting whether the battery core is wound by wrinkles and misplacement through an image recognition algorithm, so that the production quality of the battery core wound by the coil 2 can be detected in real time in the process of winding the battery core, the subsequent production process that the problematic battery core is wound by the coil 2 to enter the battery is reduced, the resource waste is caused, and the production efficiency and the yield of the battery are improved.
This embodiment also provides a full utmost point ear electricity core check out test set of convoluteing for shoot lie in electric core around the fold at 2 middle parts of rolling up and shoot district 12, lie in electric core around the anodal ear of 2 one sides of rolling up and shoot district 13, and lie in electric core around the negative pole ear of 2 opposite sides of rolling up and shoot district 14, check out test set includes: the system comprises a control terminal, a fixed frame, a first light source 6, a second light source 7, a third light source 8 and a three-mesa array camera 9;
the first light source 6 is arranged above the wrinkle shooting area 12 and is opposite to the wrinkle shooting area 12.
The second light source 7 is arranged above the positive tab shooting area 13 and is opposite to the positive tab shooting area 13.
The third light source 8 is arranged above the negative electrode tab shooting area 14 and is opposite to the negative electrode tab shooting area 14.
The three area-array cameras 9 are respectively opposite to the wrinkle shooting area 12, the positive electrode tab shooting area 13 and the negative electrode tab shooting area 14.
The three area-array cameras 9, the first light source 6, the second light source 7 and the third light source 8 are all fixedly connected with the fixing frame, and the fixing frame is fixedly connected with the ground; the fixing frame of this embodiment is required to be installed stably, and the three area-array cameras 9, the first light source 6, the second light source 7, and the third light source 8 do not shake.
The three area-array cameras 9, the first light source 6, the second light source 7 and the third light source 8 are electrically connected with the control terminal, and the control terminal is used for achieving the full-tab electric core winding detection method.
Preferably, the horizontal distance between the first light source 6 and the wrinkle shooting area 12 is 150 ± 10mm, and the longitudinal distance between the first light source 6 and the wrinkle shooting area 12 is 30 ± 10 mm;
the horizontal distance between the second light source 7 and the anodal auricle shooting area 13 is 50 +/-10 mm, the longitudinal distance between the second light source 7 and the anodal auricle shooting area 13 is 50 +/-10 mm, and the inclination angle of the second light source 7 ranges from 30 degrees to 45 degrees;
the horizontal distance between the third light source 8 and the negative tab photographing region 14 is 50 ± 10mm, the longitudinal distance between the third light source 8 and the negative tab photographing region 14 is 50 ± 10mm, and the inclination angle of the third light source 8 ranges from 30 ° to 45 °.
The first light source 6 of the embodiment adopts a white normally-bright S-90-12 type strip light source; the second light source 7 and the third light source 8 adopt white, light-gathering and high-brightness strip light sources of S-45-12 type. The second light source 7 and the third light source 8 which are inclined provide illumination with stable light intensity and fixed angle for the two sides of the battery cell winding coil 2.
The positive electrode lug shooting area 13 and the negative electrode lug shooting area 14 are shot by using a 200W pixel area array camera 9, the side length of a visual field is 73 x 55mm, the single quantity of pixels is 0.036mm/pixel, a high-depth-of-field telecentric lens is arranged, and the high-depth-of-field telecentric lens is compatible with a 60 mm-diameter battery cell.
The wrinkle shooting area 12 is shot by using a 200W pixel area-array camera 9, the long side of the visual field is 73 x 55mm, the single pixel amount is 0.036mm/pixel, a high-depth-of-field telecentric lens is arranged, and the wrinkle shooting area is compatible with a 60 mm-diameter battery cell.
Preferably, a high-depth-of-field telecentric lens is arranged in front of the area-array camera 9 of the embodiment, the area-array camera 9 adopts an MV-CA020-10GM type camera, and the high-depth-of-field telecentric lens adopts a WWT-118-01-252 type lens. The working distances between the front end of the high-depth-of-field telecentric lens and the wrinkle shooting area 12, the positive electrode tab shooting area 13 or the negative electrode tab shooting area 14 are 252 +/-5 mm.
The invention also discloses a terminal device, which comprises a processor and a storage device, wherein the storage device is used for storing one or more programs; when one or more programs are executed by the processor, the processor implements the full-tab cell winding detection method. The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, which is the control center for the test equipment and connects the various parts of the overall test equipment using various interfaces and lines.
The storage means may be adapted to store computer programs and/or modules, and the processor may be adapted to implement various functions of the terminal device by running or executing the computer programs and/or modules stored in the storage means and by invoking data stored in the storage means. The storage device may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the storage device may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
If the module/unit integrated with the full-tab battery cell winding detection device is implemented in the form of a software functional unit and sold or used as an independent product, the module/unit can be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in at least one computer-readable storage medium and used for instructing related hardware to implement the steps of the above-described embodiments of the method when executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like.
It should be noted that the above-described embodiments of the apparatus and device are merely schematic, where units illustrated as separate components may or may not be physically separate, and components illustrated as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.
Claims (7)
1. A full-tab battery cell winding detection method is characterized by comprising the following steps:
irradiating the front side of the battery cell winding by a first light source, irradiating a positive electrode lug of the battery cell winding from one side by a second light source, and irradiating a negative electrode lug of the battery cell winding from the other side by a third light source;
respectively shooting a battery cell winding, a positive electrode lug and a negative electrode lug through a three-mesa array camera, and respectively obtaining winding video data, positive electrode lug video data and negative electrode lug video data;
constructing a detection model through an image recognition algorithm;
obtaining a wrinkle detection result according to the winding video data through a detection model;
obtaining a positive tab alignment result according to the positive tab video data through the detection model;
obtaining a negative electrode tab alignment result according to the negative electrode tab video data through the detection model;
and obtaining and outputting a cell winding detection result according to the wrinkle detection result, the positive tab alignment result and the negative tab alignment result, wherein the cell winding detection result comprises qualification or disqualification.
2. The full-tab battery cell winding detection method according to claim 1, wherein the constructing of the detection model through an image recognition algorithm specifically includes:
respectively collecting a sample of winding video data, a sample of positive electrode tab video data and a sample of negative electrode tab video data, and constructing the samples into a training set and a test set;
and constructing a neural network model through a machine learning algorithm, and performing iterative optimization on the neural network model through the training set and the testing set to obtain a detection model.
3. The full-tab battery cell winding detection method according to claim 1, further comprising:
and winding the battery cell with unqualified battery cell winding detection result, and sending the battery cell into a defective product cache region through a mechanical arm.
4. The utility model provides a full utmost point ear electricity core check out test set of convoluteing for shoot be located electric core around the fold of rolling up the middle part and shoot the district, be located electric core around the anodal ear of rolling up one side and shoot the district, and be located electric core around the negative pole ear of rolling up the opposite side and shoot the district, its characterized in that includes: the system comprises a control terminal, a fixing frame, a first light source, a second light source, a third light source and a three-mesa array camera;
the first light source is arranged above the wrinkle shooting area and is opposite to the wrinkle shooting area;
the second light source is arranged above the positive lug shooting area and is opposite to the positive lug shooting area;
the third light source is arranged above the side of the negative electrode tab shooting area and is opposite to the negative electrode tab shooting area;
the three area-array cameras respectively face the wrinkle shooting area, the positive tab shooting area and the negative tab shooting area;
the three area-array cameras, the first light source, the second light source and the third light source are fixedly connected with the fixing frame, and the fixing frame is fixedly connected with the ground;
the three area-array cameras, the first light source, the second light source and the third light source are all electrically connected with the control terminal, and the control terminal is used for realizing the full-tab electric core winding detection method according to any one of claims 1 to 3.
5. The full-tab cell winding detection device according to claim 4,
the horizontal distance between the first light source and the wrinkle shooting area is 150 +/-10 mm, and the longitudinal distance between the first light source and the wrinkle shooting area is 30 +/-10 mm;
the horizontal distance between the second light source and the positive tab shooting area is 50 +/-10 mm, the longitudinal distance between the second light source and the positive tab shooting area is 50 +/-10 mm, and the inclination angle of the second light source ranges from 30 degrees to 45 degrees;
the horizontal distance between the third light source and the negative electrode tab shooting area is 50 +/-10 mm, the longitudinal distance between the third light source and the negative electrode tab shooting area is 50 +/-10 mm, and the inclination angle of the third light source ranges from 30 degrees to 45 degrees.
6. The full-tab electric core winding detection device according to claim 5, wherein working distances between the area-array camera and the wrinkle shooting area, the positive tab shooting area or the negative tab shooting area are 252 ± 5 mm.
7. A computer-readable storage medium, which includes a stored computer program, wherein when the computer program runs, the computer-readable storage medium controls an apparatus to execute the full-tab electric core winding detection method according to any one of claims 1 to 3.
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| CN114705140B (en) | 2023-08-22 |
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