CN117589075B - Method and device for detecting thickness of coating of pole piece - Google Patents
Method and device for detecting thickness of coating of pole piece Download PDFInfo
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- CN117589075B CN117589075B CN202410071181.0A CN202410071181A CN117589075B CN 117589075 B CN117589075 B CN 117589075B CN 202410071181 A CN202410071181 A CN 202410071181A CN 117589075 B CN117589075 B CN 117589075B
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- 238000000576 coating method Methods 0.000 title claims abstract description 261
- 239000011248 coating agent Substances 0.000 title claims abstract description 259
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004140 cleaning Methods 0.000 claims abstract description 143
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 22
- 238000003708 edge detection Methods 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 6
- 239000011247 coating layer Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The application discloses a method and a device for detecting the thickness of a coating of a pole piece, wherein the method comprises the following steps: the method comprises the steps that a controller receives a cleaning instruction, and a laser cleaning vibrating mirror system is controlled to clean a coating in a region to be cleaned, so that a cleaning region is obtained; the method comprises the steps that a first measuring instruction is received through a controller, and a first laser range finder is controlled to measure a first distance from the first laser range finder to a cleaning area; receiving a second measurement instruction through the controller, and controlling the second laser range finder to measure a second distance from the second laser range finder to the coating area; and determining the coating thickness of the pole piece by the controller according to the first distance, the second distance, the thickness of the base material of the pole piece and the total distance between the first laser range finder and the second laser range finder. Thus, the thickness of the coating of the produced pole piece can be ensured to meet the design requirement.
Description
Technical Field
The application relates to the technical field of lithium ion battery manufacturing, in particular to a method and a device for detecting the thickness of a coating of a pole piece.
Background
The thickness of the coating of the pole piece of the lithium ion battery is an important parameter for evaluating the working efficiency and stability of the lithium ion battery, and the internal resistance, capacity, charge-discharge performance and battery assembly process of the battery are directly influenced, so that the thickness of the coating of the pole piece needs to be effectively controlled and accurately measured during production.
The thickness of the coating is uneven due to the fluctuation of technological parameters and external disturbance in the coating process of the pole piece, so that the detection of the thickness of the coating of the pole piece has important significance.
Disclosure of Invention
The application provides a method and a device for detecting the thickness of a coating of a pole piece.
The technical scheme of the application is realized as follows:
in a first aspect, the present application provides a method for detecting a coating thickness of a pole piece, the method comprising:
Under the condition that a cleaning instruction is received by the controller, controlling the laser cleaning vibrating mirror system to clean the coating in the area to be cleaned, so as to obtain a cleaning area;
Under the condition that a first measurement instruction is received through the controller, a first laser range finder is controlled to measure a first distance from the first laser range finder to the cleaning area;
under the condition that a second measurement instruction is received through the controller, a second laser range finder is controlled to measure a second distance from the second laser range finder to a coating area; wherein the second laser range finder is positioned at the opposite side of the first laser range finder;
and determining the coating thickness of the pole piece by the controller according to the first distance, the second distance, the thickness of the base material of the pole piece and the total distance between the first laser range finder and the second laser range finder.
According to the technical means, the single-sided coating of the pole piece is cleaned through the laser cleaning galvanometer system, the first distance of the pole piece from the cleaning area is measured through the first laser range finder, the second distance of the pole piece from the coating area is measured through the second laser range finder, the thickness of the base material of the pole piece and the total distance between the first laser range finder and the second laser range finder are obtained, and the thickness of the single-sided coating of the pole piece is obtained, so that the thickness of the coating of the produced pole piece can be guaranteed to meet design requirements.
In the above-mentioned scheme, through the controller according to first distance, the second distance, the substrate thickness of pole piece and the total distance between first laser range finder with the second laser range finder, confirm the coating thickness of pole piece includes:
Adding the first distance, the second distance and the thickness of the base material of the pole piece through the controller to obtain a third distance; and determining a difference value between the total distance and the third distance through the controller to obtain the coating thickness of the second coating of the pole piece.
According to the technical means, in the embodiment of the application, the correlation laser rangefinder is adopted to measure the whole thickness of the cleaning area (namely, the absolute value of the difference between the total distance and the sum of the first distance and the second distance), namely, the thickness of the second coating and the thickness of the base material, and the thickness of the second coating is obtained by calculating the difference between the whole thickness and the thickness of the base material, so that the influence of the base material cannot be avoided, but the influence of the flatness of the test platform or the pole piece can be avoided.
In the above-mentioned scheme, the scanning mode of the first laser range finder or the second laser range finder includes: spot laser scanning or line laser scanning.
According to the technical means, the line laser scanning is performed by using one laser line, so that the first distance from the cleaning area and the second distance from the coating area can be measured at one time, and the measuring efficiency is improved.
In the above scheme, the method further comprises: under the condition that the pole piece is placed on the carrier and is positioned in the camera sensing area, controlling the camera to search the left and right sides through the controller, and determining a plurality of positions to be cleaned of the area to be cleaned;
the laser cleaning vibrating mirror system is controlled to clean a coating in a region to be cleaned, and comprises the following steps:
And controlling the laser cleaning vibrating mirror system to clean the coating in the area to be cleaned by the controller according to a plurality of positions to be cleaned of the area to be cleaned.
According to the technical means, a plurality of positions to be cleaned of the region to be cleaned are determined through the left and right edge searching of the camera, and then the coating in the region to be cleaned is cleaned according to the positions to be cleaned through the laser cleaning vibrating mirror system, so that the coating in the cleaning region is ensured to be accurately cleaned.
In the above scheme, the controlling, by the controller, the left and right edge searching of the camera, and determining a plurality of positions to be cleaned of the to-be-cleaned area, includes:
Controlling the camera to acquire pole piece images through the controller;
Performing edge detection on the pole piece image through the camera to obtain left and right edge positions of the to-be-cleaned area in the pole piece image;
And determining a plurality of positions to be cleaned of the region to be cleaned based on the left edge position and the right edge position of the region to be cleaned through the camera.
According to the technical means, the pole piece image is acquired through the camera, and edge detection is carried out on the pole piece image, so that the left edge position and the right edge position of the to-be-cleaned area in the pole piece image are obtained, and further accurate acquisition of a plurality of to-be-cleaned positions of the to-be-cleaned area is ensured.
In the above scheme, the method further comprises: under the condition that the pole piece is placed on the carrier and is positioned in the camera sensing area, controlling the camera to search the left and right sides through the controller, and determining a plurality of first ranging positions of the cleaning area; controlling the left and right sides of the camera to search through the controller, and determining a plurality of second ranging positions of the coating area;
The control first laser rangefinder measures a first distance of the first laser rangefinder from the cleaning zone, comprising: controlling, by the controller, the first laser rangefinder to measure a plurality of first distances of the first laser rangefinder from the cleaning area according to the plurality of first ranging positions of the cleaning area;
The controlling the second laser rangefinder to measure a second distance of the second laser rangefinder from the coating area includes: and controlling the second laser range finder to measure a plurality of second distances from the second laser range finder to the coating area by the controller according to the plurality of second range finding positions of the coating area.
According to the technical means, the plurality of first distance measuring positions of the cleaning area are determined through the left and right edge searching of the camera, and then the plurality of first distances of the first laser distance measuring instrument from the cleaning area are measured through the first laser distance measuring instrument according to the plurality of first distance measuring positions, so that accurate measurement of the height of the first laser distance measuring instrument from the cleaning area is ensured. And a plurality of second distance measuring positions of the coating area are determined firstly through left and right edge searching of the camera, and then a plurality of second distances of the second laser distance measuring instrument from the coating area are measured through the second laser distance measuring instrument according to the plurality of second distance measuring positions, so that accurate measurement of the height of the second laser distance measuring instrument from the coating area is ensured.
In the above scheme, the method further comprises:
And storing the coating thickness of the pole piece through a memory.
According to the technical means, the coating thickness of the pole piece is stored, whether the coating needs to be thinned or not is conveniently determined according to the coating thickness of the pole piece, and further the coating thickness of the produced pole piece is ensured to meet the design requirement.
In the above scheme, the method further comprises:
The coating thickness of the pole piece is obtained through the controller;
and determining the coating thinning amount and the width value of the pole piece according to the difference between the coating thickness of the central position and the coating thickness of the rest positions except the central position by the controller.
According to the technical means, the coating thickness requirements of the coatings at different positions of the pole piece are inconsistent, and the coating at the corresponding position is thinned according to the difference between the coating thickness at the other positions and the coating thickness at the central position, so that the production quality of the pole piece is improved.
In the above scheme, the determining, by the controller, the coating thinning amount and the width value of the pole piece according to the difference between the coating thickness at the center position and the coating thickness at the rest positions except the center position includes:
Under the condition that the difference is smaller than a preset difference threshold value, the difference value between the preset difference threshold value and the difference value is used as the coating thinning amount at the rest positions of the pole piece;
And determining the distance between at least two other positions which are continuously adjacent and have the same coating thinning amount by the controller to obtain the width value.
According to the technical means, the difference between the coating thickness of the rest positions and the coating thickness of the center position is compared with the preset difference threshold corresponding to the standard pole piece, so that the standardization of the coating thickness of the produced pole piece is ensured, and the production quality of the pole piece is improved.
In a second aspect, the present application provides a coating thickness detection device for a pole piece, the coating thickness detection device comprising: the laser cleaning vibrating mirror system comprises a laser cleaning vibrating mirror system, an objective table, a carrier, a first bracket, a second bracket, a first guide rail, a second guide rail, a third guide rail and a controller; the system also comprises a first laser range finder and a second laser range finder;
the carrier is arranged on the objective table and is fixed on the second guide rail, and the carrier is used for placing the pole piece;
The laser cleaning galvanometer system and the first laser range finder are arranged at one end of the third guide rail; the other end of the third guide rail is fixed on the first guide rail;
the first end of the first bracket and the first end of the second bracket are fixed on the object stage, and the second end of the first bracket and the second end of the second bracket are connected with the first guide rail;
The second laser range finder is fixed on the objective table;
The controller is used for controlling the first guide rail and the third guide rail to move the laser cleaning galvanometer system to the position above the region to be cleaned of the pole piece, and controlling the laser cleaning galvanometer system to clean the coating in the region to be cleaned;
the controller is further used for controlling the first guide rail to move the first laser range finder to the position above the cleaning area and controlling the first laser range finder to measure a first distance between the first laser range finder and the cleaning area;
The controller is also used for controlling the second guide rail to move the pole piece to the position above the second laser range finder and controlling the second laser range finder to measure a second distance between the second laser range finder and the coating area;
the controller is further configured to determine a coating thickness of the pole piece based on the first distance, the second distance, a substrate thickness of the pole piece, and a total distance between the first laser rangefinder and the second laser rangefinder.
According to the technical means, the single-sided coating of the pole piece is cleaned through the laser cleaning galvanometer system, the first distance of the pole piece from the cleaning area is measured through the first laser range finder, the second distance of the pole piece from the coating area is measured through the second laser range finder, the thickness of the base material of the pole piece and the total distance between the first laser range finder and the second laser range finder are obtained, and the thickness of the single-sided coating of the pole piece is obtained, so that the thickness of the coating of the produced pole piece can be guaranteed to meet design requirements.
In the above scheme, the coating thickness detection device further comprises a camera, and the camera and the laser cleaning galvanometer system are integrated together; the controller is also used for controlling the first guide rail and the third guide rail to move the camera to the position above the pole piece;
The controller is also used for controlling the camera to determine a plurality of positions to be cleaned of the region to be cleaned of the pole piece and receiving the positions to be cleaned of the region to be cleaned transmitted by the camera; the controller is also used for controlling the first guide rail and the third guide rail to move the laser cleaning galvanometer system to the upper part of the to-be-cleaned area according to a plurality of to-be-cleaned positions of the to-be-cleaned area.
According to the technical means, a plurality of positions to be cleaned of the region to be cleaned are determined through the left and right edge searching of the camera, and then the coating in the region to be cleaned is cleaned according to the positions to be cleaned through the laser cleaning vibrating mirror system, so that the coating in the cleaning region is ensured to be accurately cleaned.
In the above scheme, the coating thickness detection device further comprises a camera, and the camera and the laser cleaning galvanometer system are integrated together; the controller is also used for controlling the first guide rail and the third guide rail to move the camera to the position above the pole piece;
The controller is further configured to control the camera to determine a plurality of first ranging positions of the cleaning area, and receive the plurality of first ranging positions transmitted by the camera; the controller is further used for controlling the first guide rail to move the first laser range finder to the position above the cleaning area according to the plurality of first range finding positions;
The controller is further configured to control the camera to determine a plurality of second ranging positions of the coating area, and receive the plurality of second ranging positions transmitted by the camera; the controller is also used for controlling the second guide rail to move the pole piece to the position above the second laser range finder according to the plurality of second range finding positions.
According to the technical means, the plurality of first distance measuring positions of the cleaning area are determined through the left and right edge searching of the camera, and then the plurality of first distances of the first laser distance measuring instrument from the cleaning area are measured through the first laser distance measuring instrument according to the plurality of first distance measuring positions, so that accurate measurement of the height of the first laser distance measuring instrument from the cleaning area is ensured. And a plurality of second distance measuring positions of the coating area are determined firstly through left and right edge searching of the camera, and then a plurality of second distances of the second laser distance measuring instrument from the coating area are measured through the second laser distance measuring instrument according to the plurality of second distance measuring positions, so that accurate measurement of the height of the second laser distance measuring instrument from the coating area is ensured.
In the above scheme, the coating thickness detection device further comprises a dust collection device, and the dust collection device and the laser cleaning galvanometer system are integrated together;
The controller is also used for controlling the dust collection device to absorb the cleaned coating.
According to the technical means, the cleaned coating is sucked by the dust suction device, so that the accuracy of the measured coating thickness of the pole piece can be improved.
The application discloses a method and a device for detecting the thickness of a coating of a pole piece, wherein a single-sided coating of the pole piece is cleaned through a laser cleaning vibrating mirror system, a first distance from the self distance of the first laser distance meter to a cleaning area is measured, a second distance from the self distance of the second laser distance meter to a coating area is measured, the thickness of a base material of the pole piece and the total distance between the first laser distance meter and the second laser distance meter are measured, so that the thickness of the coating of the single-sided coating of the pole piece is obtained, and the thickness of the coating of the produced pole piece can be ensured to meet design requirements.
Drawings
FIG. 1 is a flow chart of a method for detecting the thickness of a coating layer of a pole piece according to an embodiment of the application;
FIG. 2 is a schematic diagram I of a battery pole piece composition structure in an embodiment of the application;
FIG. 3 is a second schematic diagram of a battery pole piece assembly structure according to an embodiment of the present application;
fig. 4 is a schematic diagram III of a battery pole piece composition structure in an embodiment of the application;
fig. 5 is a schematic diagram of a battery pole piece composition structure in an embodiment of the present application;
FIG. 6 is a diagram showing the relationship between the distance measurement position and the coating thickness according to the embodiment of the present application;
FIG. 7 is a second flow chart of a method for detecting the thickness of a coating layer on a pole piece according to an embodiment of the present application;
FIG. 8 is a schematic diagram I of a structure of a device for detecting thickness of a coating layer of a pole piece according to an embodiment of the present application;
Fig. 9 is a schematic diagram II of a structure of a device for detecting a coating thickness of a pole piece according to an embodiment of the present application.
Reference numerals:
20-a first coating; 21-a ceramic layer disposed at the edge of the first coating layer; 22-a substrate; 23-an area to be cleaned; 30-a cleaning zone; 40-a first laser spot; 41-a second laser spot; 42-a first line segment; 43-a second line segment; 50-laser line; 51-scanning the area; 801-laser cleaning galvanometer system; 802-stage; 803—a carrier; 804-a first rack; 805-a second rack; 806-a first rail; 807-a second rail; 808-a third rail; 809—a first laser rangefinder; 810-a camera; 811-a dust extraction device; 812-servo motor; 813-controlling an electric cabinet; 814-button; 815-computer.
Detailed Description
For a more complete understanding of the nature and the technical content of the embodiments of the present application, reference should be made to the following detailed description of embodiments of the application, taken in conjunction with the accompanying drawings, which are meant to be illustrative only and not limiting of the embodiments of the application.
The embodiment of the application provides a method for detecting the thickness of a coating layer of a pole piece, and fig. 1 is a schematic flow chart of the method for detecting the thickness of the coating layer of the pole piece in the embodiment of the application, as shown in fig. 1, the method for detecting the thickness of the coating layer of the pole piece specifically can comprise the following steps:
S101: and under the condition that the controller receives the cleaning instruction, controlling the laser cleaning vibrating mirror system to clean the coating in the area to be cleaned, so as to obtain a cleaning area.
The cleaning instruction is used for controlling the laser cleaning galvanometer system to clean the coating in the area to be cleaned.
The laser cleaning galvanometer system controls laser beams to carry out high-speed scanning filling and coating removal on the area to be cleaned for a plurality of times through the galvanometer. Specifically, the laser produces a high energy, high density, precisely directed beam of light, which is then reflected by a galvanometer from the laser to the area to be cleaned. In the cleaning process, the vibrating mirror vibrates at a high speed, so that the laser beam is rapidly switched between different positions in the area to be cleaned, and the laser beam is subjected to high-speed scanning filling and coating removal for a plurality of times in the area to be cleaned.
The area to be cleaned refers to a specific area on the battery pole piece that needs to be cleaned.
The battery electrode sheet is one of the important components constituting the battery, and it is generally referred to as a positive electrode sheet and a negative electrode sheet of the battery. Among these, the positive electrode sheet is one polarity in a battery, and is generally composed of a thin film containing a positive electrode active material (e.g., a positive electrode material). The positive electrode sheet is a portion that receives current and accommodates lithium ions during charge and discharge. When the battery is discharged, lithium ions are deintercalated from the positive electrode sheet, and electrons are released from the positive electrode active material to form a current. The negative electrode sheet is another polarity in a battery, and is generally composed of a thin film containing a negative electrode active material (e.g., a negative electrode material). During charge and discharge, the negative electrode sheet is a portion that discharges current and accommodates lithium ions. When the battery is charged, external current passes through the battery, lithium ions are inserted into the negative electrode sheet, and chemical reaction with the negative electrode active material occurs.
Fig. 2 is a schematic diagram of a structure of a battery pole piece according to an embodiment of the present application, as shown in fig. 2, the battery pole piece includes a first coating layer 20, a ceramic layer 21 disposed at an edge of the first coating layer, a substrate 22, a second coating layer (not shown in fig. 2), and a ceramic layer (not shown in fig. 2) disposed at an edge of the second coating layer. The first coating or the second coating means that a special coating is coated on the surface of the substrate, and the coating can effectively improve the performance of the battery and protect the substrate. The ceramic layer is non-conductive and is a good insulator. Fig. 2 is a rectangular strip of pole pieces cut from the width direction to give flat and wrinkle-free strips. In fig. 2, the first coating layer 20, the ceramic layer 21 disposed at the edge of the first coating layer, and the substrate 22 are stacked and arranged.
In some embodiments, further comprising: under the condition that the pole piece is placed on the carrier and is positioned in the sensing area of the camera, the left and right sides of the camera are controlled by the controller to determine a plurality of positions to be cleaned of the area to be cleaned; s101 may include: and controlling the laser cleaning vibrating mirror system to clean the coating in the area to be cleaned according to a plurality of positions to be cleaned of the area to be cleaned by the controller.
The carrier means an object for carrying the pole piece.
The camera may be a Charge-Coupled Device (CCD) camera.
The controller is used for controlling the camera to search the left and right sides, determining a plurality of positions to be cleaned of the region to be cleaned, receiving a plurality of positions to be cleaned (a plurality of position points forming the region to be cleaned) of the region to be cleaned 23 (shown in fig. 2) transmitted by the camera through the controller, controlling the laser cleaning galvanometer system to clean the first coating 20 in the region to be cleaned 23 according to the plurality of positions to be cleaned of the region to be cleaned 23 (shown in fig. 2), and displaying a cleaning region 30 (shown in fig. 3).
In some embodiments, the determining a plurality of positions to be cleaned of the area to be cleaned by controlling the left and right edges of the camera through the controller comprises:
controlling a camera to acquire pole piece images through a controller;
Performing edge detection on the pole piece image through a camera to obtain left and right edge positions of a region to be cleaned in the pole piece image;
and determining a plurality of positions to be cleaned of the region to be cleaned based on the left edge position and the right edge position of the region to be cleaned through a camera.
In the embodiment of the application, the pole piece image is acquired by the camera, and the edge detection is carried out on the pole piece image, so that the left edge position and the right edge position of the to-be-cleaned area in the pole piece image are obtained, and further, the accurate acquisition of a plurality of to-be-cleaned positions of the to-be-cleaned area is ensured.
S102: under the condition that a first measurement instruction is received through the controller, the first laser range finder is controlled to measure a first distance from the first laser range finder to the cleaning area.
The first measurement instruction is used for controlling the first laser range finder to measure a first distance from the first laser range finder to the cleaning area.
A laser range finder is an instrument that uses a certain parameter of modulated laser to achieve distance measurement of a target. The measuring range of the laser range finder is 3.5-5000 meters, and the measuring range of the laser range finder is not limited in the application.
The first laser range finder and the laser cleaning galvanometer system are positioned on the same side of the battery pole piece.
The cleaning area refers to an area after the coating cleaning is performed on the area to be cleaned.
In some embodiments, further comprising: under the condition that the pole piece is placed on the carrier and is positioned in the camera sensing area, controlling the camera to search the left and right sides through the controller, and determining a plurality of first ranging positions of the cleaning area; s102 may include: and controlling the first laser range finder to measure a plurality of first distances from the first laser range finder to the cleaning area by the controller according to the plurality of first range finding positions.
In the embodiment of the application, a plurality of first distance measuring positions in the width direction of the cleaning area are determined by left and right edge searching of a camera, and a plurality of first distances from the first laser distance measuring device to the cleaning area are measured by the first laser distance measuring device according to the plurality of first distance measuring positions on the cleaning area.
In some embodiments, controlling, by the controller, the camera to seek from side to side, determining a plurality of first ranging locations for the wash zone, comprising:
Controlling a camera to acquire a first image including a cleaning region by a controller;
performing edge detection on the first image through a camera to obtain left and right edge positions of a cleaning area in the first image;
A plurality of first ranging positions of the washing area are determined by the camera based on the left and right edge positions of the washing area.
In the embodiment of the application, the first image is acquired through the camera, and the edge detection is carried out on the first image, so that the left edge position and the right edge position of the cleaning area in the first image are obtained, and further, the accurate acquisition of a plurality of first ranging positions of the cleaning area is ensured.
S103: under the condition that a second measurement instruction is received through the controller, controlling a second laser range finder to measure a second distance from the second laser range finder to the coating area; wherein the second laser rangefinder is located opposite the first laser rangefinder.
The second measurement instruction is used for controlling the second laser range finder to measure a second distance from the second laser range finder to the coating region.
The first laser range finder and the second laser range finder are positioned on two sides of the battery pole piece.
The coating region refers to the region of the battery pole piece coated with the coating.
In some embodiments, further comprising: under the condition that the pole piece is placed on the carrier and is positioned in the camera sensing area, controlling the camera to search the left and right edges through the controller, and determining a plurality of second ranging positions of the coating area; s103 may include: and controlling the second laser distance measuring instrument to measure a plurality of second distances from the second laser distance measuring instrument to the coating area according to the plurality of second distance measuring positions through the controller.
In the embodiment of the application, a plurality of second ranging positions in the width direction of the coating area are determined by left and right edge searching of the camera, and a plurality of second distances from the second laser range finder to the coating area are measured according to the plurality of second ranging positions by the second laser range finder.
In some embodiments, controlling the camera to seek left and right by the controller, determining a plurality of second ranging locations for the coating region includes:
Controlling the camera to acquire a second image comprising the coating region by the controller;
Performing edge detection on the second image through a camera to obtain left and right edge positions of a coating region in the second image;
a plurality of second ranging positions of the coating region are determined by the camera based on the left and right edge positions of the coating region.
In the embodiment of the application, the second image is acquired by the camera, and the edge detection is carried out on the second image, so that the left edge position and the right edge position of the coating area in the second image are obtained, and further, the accurate acquisition of a plurality of second ranging positions of the coating area is ensured.
In some embodiments, the scanning pattern of the first laser rangefinder or the second laser rangefinder comprises: spot laser scanning or line laser scanning.
Spot laser scanning is scanning with a single laser spot. As shown in fig. 4, a single first laser spot 40 is used to scan the cleaning area in the width direction, and a plurality of scanning points in the width direction form a first line segment 42, so as to obtain a plurality of first distances between a plurality of first ranging positions and corresponding scanning points; the coating area is scanned in the width direction using a single second laser spot 41, and a plurality of scanning points in the width direction form a second line segment 43, resulting in a plurality of second distance measuring positions and a plurality of second distances between corresponding scanning points.
The line laser scan is a scan using one laser line so that a first distance from the cleaning area and a second distance from the coating area can be measured at one time. As shown in fig. 5, the cleaning area and the coating area are simultaneously scanned in the width direction using the laser line 50, and a plurality of scanning points in the width direction constitute a scanning area 51, resulting in a plurality of first distances between a plurality of first ranging positions and corresponding scanning points, and a plurality of second distances between a plurality of second ranging positions and corresponding scanning points.
S104: and determining the coating thickness of the pole piece by the controller according to the first distance, the second distance, the thickness of the base material of the pole piece and the total distance between the first laser range finder and the second laser range finder.
It should be noted that, the pole piece includes first coating and second coating, and when first laser range finder is located the one side of the first coating of pole piece, and the second laser range finder is located the one side of the second coating of pole piece, and first distance is measured through first laser range finder, and the second distance is measured through second laser range finder, then according to first distance, second distance, the substrate thickness of pole piece and the total distance between first laser range finder and the second laser range finder through the controller, obtain the coating thickness of the second coating of pole piece.
Fig. 6 is a schematic diagram of a relationship between a distance measurement position and a coating thickness in an embodiment of the present application, and as shown in fig. 6, the coating thicknesses corresponding to a plurality of distance measurement positions (such as X1, X2, and X3) in the width direction of the pole piece are read.
In some embodiments, further comprising: the coating thickness of the pole piece is stored by a memory.
In some embodiments, further comprising: the coating thickness of the pole piece is obtained through a controller;
The controller determines the coating thinning amount and the width value of the pole piece according to the difference between the coating thickness of the central position and the coating thickness of the rest positions except the central position.
In the embodiment of the application, the coating thickness of the central position of the cleaning area of the pole piece is taken as a reference, and the coating thinning amount and the width value of the pole piece are determined according to the difference between the coating thickness of the central position and the coating thicknesses of the rest positions except the central position. The coating thickness is uniform at the corresponding positions on both sides of the center position.
In some embodiments, determining, by the controller, the coating skiving amount and the width value of the pole piece from the difference between the coating thickness at the center location and the coating thickness at the rest locations other than the center location, comprises:
under the condition that the difference is smaller than a preset difference threshold value, the difference value between the preset difference threshold value and the difference value is used as the coating thinning amount at the rest positions of the pole piece;
and determining the distance between at least two other positions which are continuously adjacent and have the same coating thinning amount by the controller to obtain a width value.
The preset difference threshold in the present application is understood to be the standard difference between the coating thickness at the center position of the cleaning region of the standard pole piece and the coating thickness at the rest positions except the center position.
In the embodiment of the application, the difference between the coating thickness of the rest positions and the coating thickness of the center position is compared with the preset difference threshold corresponding to the standard pole piece to judge whether the coating thickness of the pole piece is standardized or not. Specifically, when it is determined that the difference between the thickness of the coating at the rest position and the thickness of the coating at the center position is smaller than a preset difference threshold (namely, standard difference), the thickness of the coating at the rest position is thicker at present, and thinning is required.
When the difference between the coating thickness of the rest position and the coating thickness of the central position is determined to be larger than a preset difference threshold (namely standard difference), the fact that the coating thickness of the current rest position is thinner is indicated, the coating is required to be applied again according to the difference between the coating thickness of the rest position and the coating thickness of the central position and the difference between the coating thickness of the rest position and the preset difference threshold until the difference between the coating thickness of the rest position and the coating thickness of the central position is equal to the preset difference threshold, and the standardization of the coating thickness of the pole piece is guaranteed.
In the embodiment of the application, the single-sided coating of the pole piece is cleaned through the laser cleaning galvanometer system, the first distance from the self distance cleaning area measured by the first laser range finder, the second distance from the self distance coating area measured by the second laser range finder, the thickness of the base material of the pole piece and the total distance between the first laser range finder and the second laser range finder are used for obtaining the coating thickness of the single-sided coating of the pole piece, so that the coating thickness of the produced pole piece can be ensured to meet the design requirement.
In order to further embody the purpose of the present application, on the basis of the above embodiment of the present application, fig. 7 is a schematic flow chart of a method for detecting a coating thickness of a pole piece according to the embodiment of the present application, and as shown in fig. 7, the method for detecting a coating thickness of a pole piece specifically may include:
S701: and under the condition that the controller receives the cleaning instruction, controlling the laser cleaning vibrating mirror system to clean the coating in the area to be cleaned, so as to obtain a cleaning area.
The cleaning instruction is used for controlling the laser cleaning galvanometer system to clean the coating in the area to be cleaned.
The area to be cleaned refers to a specific area on the battery pole piece that needs to be cleaned.
In some embodiments, further comprising: under the condition that the pole piece is placed on the carrier and is positioned in the sensing area of the camera, the left and right sides of the camera are controlled by the controller to determine a plurality of positions to be cleaned of the area to be cleaned; s701 may include: and controlling the laser cleaning vibrating mirror system to clean the coating in the area to be cleaned according to a plurality of positions to be cleaned of the area to be cleaned by the controller.
The carrier means an object for carrying the pole piece.
The camera may be a Charge-Coupled Device (CCD) camera.
The controller is used for controlling the camera to search the left and right sides, determining a plurality of positions to be cleaned of the region to be cleaned, receiving a plurality of positions to be cleaned (a plurality of position points forming the region to be cleaned) of the region to be cleaned 23 (shown in fig. 2) transmitted by the camera through the controller, controlling the laser cleaning galvanometer system to clean the first coating 20 in the region to be cleaned 23 according to the plurality of positions to be cleaned of the region to be cleaned 23 (shown in fig. 2), and displaying a cleaning region 30 (shown in fig. 3).
In some embodiments, the determining a plurality of positions to be cleaned of the area to be cleaned by controlling the left and right edges of the camera through the controller comprises:
controlling a camera to acquire pole piece images through a controller;
Performing edge detection on the pole piece image through a camera to obtain left and right edge positions of a region to be cleaned in the pole piece image;
and determining a plurality of positions to be cleaned of the region to be cleaned based on the left edge position and the right edge position of the region to be cleaned through a camera.
In the embodiment of the application, the pole piece image is acquired by the camera, and the edge detection is carried out on the pole piece image, so that the left edge position and the right edge position of the to-be-cleaned area in the pole piece image are obtained, and further, the accurate acquisition of a plurality of to-be-cleaned positions of the to-be-cleaned area is ensured.
S702: and under the condition that the controller receives the first measurement instruction, controlling the first laser range finder to measure a first distance from the cleaning area.
The first measurement instruction is used for controlling the first laser range finder to measure a first distance from the cleaning area.
The cleaning area refers to an area after the coating cleaning is performed on the area to be cleaned.
The first laser range finder and the laser cleaning galvanometer system are positioned on the same side of the battery pole piece.
In some embodiments, further comprising: under the condition that the pole piece is placed on the carrier and is positioned in the camera sensing area, controlling the camera to search the left and right sides through the controller, and determining a plurality of first ranging positions of the cleaning area; s702 may include: and controlling the first laser range finder to measure a plurality of first distances from the first laser range finder to the cleaning area by the controller according to the plurality of first range finding positions.
In the embodiment of the application, a plurality of first distance measuring positions in the width direction of the cleaning area are determined by left and right edge searching of a camera, and a plurality of first distances from the first laser distance measuring device to the cleaning area are measured by the first laser distance measuring device according to the plurality of first distance measuring positions on the cleaning area.
In some embodiments, controlling, by the controller, the camera to seek from side to side, determining a plurality of first ranging locations for the wash zone, comprising:
Controlling a camera to acquire a first image including a cleaning region by a controller;
performing edge detection on the first image through a camera to obtain left and right edge positions of a cleaning area in the first image;
A plurality of first ranging positions of the washing area are determined by the camera based on the left and right edge positions of the washing area.
In the embodiment of the application, the first image is acquired through the camera, and the edge detection is carried out on the first image, so that the left edge position and the right edge position of the cleaning area in the first image are obtained, and further, the accurate acquisition of a plurality of first ranging positions of the cleaning area is ensured.
S703: and under the condition that a second measurement instruction is received by the controller, controlling a second laser range finder to measure a second distance from the coating region.
The second measurement instruction is for controlling a second laser rangefinder to measure a second distance from the coating zone.
The first laser range finder and the second laser range finder are positioned on two sides of the battery pole piece.
The coating region refers to the region of the battery pole piece coated with the coating.
In some embodiments, further comprising: under the condition that the pole piece is placed on the carrier and is positioned in the camera sensing area, controlling the camera to search the left and right edges through the controller, and determining a plurality of second ranging positions of the coating area; s703 may include: and controlling the second laser distance measuring instrument to measure a plurality of second distances from the second laser distance measuring instrument to the coating area according to the plurality of second distance measuring positions through the controller.
In the embodiment of the application, a plurality of second distance measuring positions in the width direction of the coating area are determined by left and right edge searching of the camera, and a plurality of second distances from the second laser distance measuring device to the coating area are measured by the second laser distance measuring device.
In some embodiments, controlling the camera to seek left and right by the controller, determining a plurality of second ranging locations for the coating region includes:
Controlling the camera to acquire a second image comprising the coating region by the controller;
Performing edge detection on the second image through a camera to obtain left and right edge positions of a coating region in the second image;
a plurality of second ranging positions of the coating region are determined by the camera based on the left and right edge positions of the coating region.
In the embodiment of the application, the second image is acquired by the camera, and the edge detection is carried out on the second image, so that the left edge position and the right edge position of the coating area in the second image are obtained, and further, the accurate acquisition of a plurality of second ranging positions of the coating area is ensured.
In some embodiments, the scanning mode of the first laser range finder or the second laser range finder comprises: spot laser scanning or line laser scanning.
Spot laser scanning is scanning with a single laser spot. As shown in fig. 4, a single first laser spot 40 is used to scan the cleaning area in the width direction, and a plurality of scanning points in the width direction form a line segment 42, so as to obtain a plurality of first distances between a plurality of first ranging positions and corresponding scanning points; the coating area is scanned in the width direction using a single second laser spot 41, and a plurality of scanning points in the width direction form a line segment 43, resulting in a plurality of second distance measuring positions and a plurality of second distances between corresponding scanning points.
The line laser scan is a scan using one laser line so that a first distance from the cleaning area and a second distance from the coating area can be measured at one time. As shown in fig. 5, the cleaning area and the coating area are simultaneously scanned in the width direction using the laser line 50, and a plurality of scanning points in the width direction constitute a scanning area 51, resulting in a plurality of first distances between a plurality of first ranging positions and corresponding scanning points, and a plurality of second distances between a plurality of second ranging positions and corresponding scanning points.
S704: adding the first distance, the second distance and the thickness of the base material of the pole piece through the controller to obtain a third distance; and determining a difference value between the total distance between the first laser range finder and the second laser range finder and the third distance through the controller to obtain the coating thickness of the second coating of the pole piece.
In the embodiment of the application, a first laser range finder is positioned at one side of a first coating of a pole piece, a second laser range finder is positioned at one side of a second coating of the pole piece, first distances of a plurality of first range finding positions are measured by the first laser range finder, second distances of a plurality of second range finding positions are measured by the second laser range finder, then the first distances, the second distances and the thickness of a base material of the pole piece are added by a controller to obtain a third distance, and then a difference value between the total distances and the third distance is determined by the controller to obtain the coating thickness of the second coating of the pole piece.
In the embodiment of the application, the correlation laser range finder is adopted to measure the whole thickness of the cleaning area (namely, the absolute value of the difference between the total distance and the sum of the first distance and the second distance), namely, the thickness of the second coating and the thickness of the base material, and the thickness of the second coating is obtained by calculating the difference between the whole thickness and the thickness of the base material, so that the influence of the base material cannot be avoided, but the influence of the flatness of the test platform or the pole piece can be avoided.
In order to implement the method according to the embodiment of the present application, based on the same inventive concept, a front view of a device for detecting a coating thickness of a pole piece is also provided in the embodiment of the present application, and fig. 8 is a schematic diagram one of a composition structure of the device for detecting a coating thickness of a pole piece in the embodiment of the present application.
As shown in fig. 8, the coating thickness detection device of the pole piece includes: a laser cleaning galvanometer system 801, a stage 802, a carrier 803, a first bracket 804, a second bracket 805, a first rail 806, a second rail 807, a third rail 808, a first laser rangefinder 809, a second laser rangefinder 812, and a controller (not shown in fig. 8);
the carrier 803 is arranged on the object stage 802, the carrier 803 is fixed on the second guide rail 807, and the carrier 803 is used for placing the pole piece;
the laser cleaning galvanometer system 801 and the first laser rangefinder 809 are disposed at one end of the third rail 808; the other end of the third rail 808 is fixed to the first rail 806;
first ends of the first bracket 804 and the second bracket 805 are fixed to the stage 802, and second ends of the first bracket 804 and the second bracket 805 are connected to the first guide rail 806;
A second laser rangefinder 812 is secured to the stage 802.
First, the controller is used to control the second guide 807 to move out of the stage 802 for the user to place the pole piece on the carrier 803; the controller is further used for controlling the first guide rail 806 and the third guide rail 808 to move the laser cleaning galvanometer system 801 to the upper part of the region to be cleaned of the pole piece, and controlling the laser cleaning galvanometer system 801 to clean the coating in the region to be cleaned to obtain a cleaning region; secondly, the controller is further configured to control the first guide rail 806 to move the first laser rangefinder 809 to above the cleaning area, and control the first laser rangefinder 809 to measure a first distance of the first laser rangefinder 809 from the cleaning area; again, the controller is also configured to control the second guide 807 to move the pole piece over the second laser rangefinder 812, and to control the second laser rangefinder 812 to measure a second distance of the second laser rangefinder 812 from the coating region. Finally, the controller is further configured to determine a coating thickness of the pole piece based on the first distance, the second distance, the substrate thickness of the pole piece, and the total distance between the first laser rangefinder 809 and the second laser rangefinder 812.
Further, the coating thickness detection device of the pole piece further comprises: a camera 810 (e.g., a CCD camera), the camera 810 being integrated with the laser cleaning galvanometer system 801; the controller is also used to control the first rail 806 and the third rail 808 to move the CCD camera 810 over the pole piece; the control camera 810 determines a plurality of positions to be cleaned of the region to be cleaned of the pole piece and receives the positions to be cleaned of the region to be cleaned transmitted by the camera; the controller is further configured to control the first guide rail 806 and the third guide rail 808 to move the laser cleaning galvanometer system to a position above the area to be cleaned according to the plurality of positions to be cleaned of the area to be cleaned, and control the laser cleaning galvanometer system 801 to clean the coating in the area to be cleaned, so as to obtain a cleaning area.
Further, the controller is further configured to control the camera 810 to determine a plurality of first ranging positions of the washing area, and receive the plurality of first ranging positions transmitted by the camera; the controller is further configured to control the first guide rail 806 to move the first laser rangefinder 809 to above the cleaning area according to the plurality of first ranging positions, and control the first laser rangefinder 809 to measure a plurality of first distances of the first laser rangefinder 809 from the cleaning area. The controller is further configured to control the camera 810 to determine a plurality of second ranging locations of the coating area and to receive the plurality of second ranging locations transmitted by the camera; the controller is further configured to control the second guide rail 807 to move the pole piece over the second laser rangefinder 812 according to the plurality of second ranging positions, and control the second laser rangefinder 812 to measure a plurality of second distances of the second laser rangefinder 812 from the coating region. The controller is also used for adding the plurality of first distances, the plurality of second distances and the substrate thicknesses of the pole pieces to obtain a plurality of third distances, and determining the difference value between the total distance and the plurality of third distances to obtain a plurality of coating thicknesses of the second coating of the pole pieces in the width direction; the total distance is the height between the first laser range finder and the second laser range finder.
Further, the coating thickness detection device of the pole piece further comprises: a memory (not shown in fig. 8) for storing the coating thickness of the pole piece.
Further, the controller is also used for obtaining the coating thickness of the pole piece and determining the coating thinning amount and the width value of the pole piece according to the difference between the coating thickness of the central position and the coating thickness of the rest positions except the central position.
Further, the coating thickness detection device of the pole piece further comprises: a dust extraction 811, the dust extraction 811 being integrated with the laser cleaning galvanometer system 801; the controller is also used to control the suction device 811 to suck the cleaned coating.
The first rail may be an X-axis rail, the second rail may be a Y-axis rail, and the third rail may be a Z-axis rail.
Based on the device for detecting the coating thickness of the pole piece shown in fig. 8, the embodiment of the application also provides a side view of the device for detecting the coating thickness of the pole piece, and fig. 9 is a schematic diagram II of the composition structure of the device for detecting the coating thickness of the pole piece in the embodiment of the application.
As shown in fig. 9, the coating thickness detection device of the pole piece includes: the laser cleaning galvanometer system 801, the carrier 803, the third guide rail 808, the camera 810, the dust suction device 811, and the controller, the remaining components shown in fig. 8 are not shown in fig. 9, and the controller in fig. 9 includes a servo motor 812 and a control electric cabinet 813, and further includes: a button 814 and a computer 815.
Wherein, the button 814 is activated and each component of the coating thickness detection device of the pole piece is powered on.
The computer 815 sends a corresponding control instruction to the control electric cabinet 813, and the control electric cabinet 813 controls the servo motor 812 through the corresponding control instruction to control corresponding components (e.g., the laser cleaning galvanometer system, the camera, the first laser rangefinder, the second laser rangefinder, etc.).
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.
The units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present invention may be integrated in one processing module, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units. Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or optical disk, or the like, which can store program codes.
The methods disclosed in the method embodiments provided by the application can be arbitrarily combined under the condition of no conflict to obtain a new method embodiment.
The features disclosed in the several product embodiments provided by the application can be combined arbitrarily under the condition of no conflict to obtain new product embodiments.
The features disclosed in the embodiments of the method or the apparatus provided by the application can be arbitrarily combined without conflict to obtain new embodiments of the method or the apparatus.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A method for detecting the thickness of a coating of a pole piece, the method comprising:
Under the condition that a cleaning instruction is received by the controller, controlling the laser cleaning vibrating mirror system to clean the coating in the area to be cleaned, so as to obtain a cleaning area;
Under the condition that a first measurement instruction is received through the controller, a first laser range finder is controlled to measure a first distance from the first laser range finder to the cleaning area;
under the condition that a second measurement instruction is received through the controller, a second laser range finder is controlled to measure a second distance from the second laser range finder to a coating area; wherein the second laser range finder is positioned at the opposite side of the first laser range finder;
adding the first distance, the second distance and the thickness of the base material of the pole piece through the controller to obtain a third distance;
Determining a difference value between the total distance and the third distance through the controller to obtain the coating thickness of the pole piece; wherein the total distance is the distance between the first laser range finder and the second laser range finder.
2. The method of claim 1, wherein the scanning pattern of the first laser rangefinder or the second laser rangefinder comprises: spot laser scanning or line laser scanning.
3. The coating thickness detection method according to claim 1, further comprising:
Under the condition that the pole piece is placed on the carrier and is positioned in the camera sensing area, controlling the camera to search the left and right sides through the controller, and determining a plurality of positions to be cleaned of the area to be cleaned;
the laser cleaning vibrating mirror system is controlled to clean a coating in a region to be cleaned, and comprises the following steps:
And controlling the laser cleaning vibrating mirror system to clean the coating in the area to be cleaned by the controller according to a plurality of positions to be cleaned of the area to be cleaned.
4. A coating thickness detection method according to claim 3, wherein the controlling the camera to seek the left and right sides by the controller, determining a plurality of positions to be cleaned of the area to be cleaned, comprises:
Controlling the camera to acquire pole piece images through the controller;
Performing edge detection on the pole piece image through the camera to obtain left and right edge positions of the to-be-cleaned area in the pole piece image;
And determining a plurality of positions to be cleaned of the region to be cleaned based on the left edge position and the right edge position of the region to be cleaned through the camera.
5. The coating thickness detection method according to claim 1, further comprising:
Under the condition that the pole piece is placed on the carrier and is positioned in the camera sensing area, controlling the camera to search the left and right sides through the controller, and determining a plurality of first ranging positions of the cleaning area; controlling the left and right sides of the camera to search through the controller, and determining a plurality of second ranging positions of the coating area;
The control first laser rangefinder measures a first distance of the first laser rangefinder from the cleaning zone, comprising: controlling, by the controller, the first laser rangefinder to measure a plurality of first distances of the first laser rangefinder from the cleaning area according to the plurality of first ranging positions of the cleaning area;
The controlling the second laser rangefinder to measure a second distance of the second laser rangefinder from the coating area includes: and controlling the second laser range finder to measure a plurality of second distances from the second laser range finder to the coating area by the controller according to the plurality of second range finding positions of the coating area.
6. The coating thickness detection method according to claim 1, further comprising:
And storing the coating thickness of the pole piece through a memory.
7. The method for detecting the thickness of a coating according to claim 6, further comprising:
The coating thickness of the pole piece is obtained through the controller;
and determining the coating thinning amount and the width value of the pole piece according to the difference between the coating thickness of the central position and the coating thickness of the rest positions except the central position by the controller.
8. The coating thickness detection method according to claim 7, wherein the determining, by the controller, the coating thinning amount and the width value of the pole piece based on a difference between the coating thickness at a center position and the coating thickness at the rest positions other than the center position, comprises:
Under the condition that the difference is smaller than a preset difference threshold value, the difference value between the preset difference threshold value and the difference value is used as the coating thinning amount at the rest positions of the pole piece;
And determining the distance between at least two other positions which are continuously adjacent and have the same coating thinning amount by the controller to obtain the width value.
9. A coating thickness detection device of a pole piece, characterized in that the coating thickness detection device comprises: the laser cleaning vibrating mirror system comprises a laser cleaning vibrating mirror system, an objective table, a carrier, a first bracket, a second bracket, a first guide rail, a second guide rail, a third guide rail and a controller; the system also comprises a first laser range finder and a second laser range finder;
the carrier is arranged on the objective table and is fixed on the second guide rail, and the carrier is used for placing the pole piece;
The laser cleaning galvanometer system and the first laser range finder are arranged at one end of the third guide rail; the other end of the third guide rail is fixed on the first guide rail;
the first end of the first bracket and the first end of the second bracket are fixed on the object stage, and the second end of the first bracket and the second end of the second bracket are connected with the first guide rail;
The second laser range finder is fixed on the objective table;
The controller is used for controlling the first guide rail and the third guide rail to move the laser cleaning galvanometer system to the position above the region to be cleaned of the pole piece, and controlling the laser cleaning galvanometer system to clean the coating in the region to be cleaned;
the controller is further used for controlling the first guide rail to move the first laser range finder to the position above the cleaning area and controlling the first laser range finder to measure a first distance between the first laser range finder and the cleaning area;
The controller is also used for controlling the second guide rail to move the pole piece to the position above the second laser range finder and controlling the second laser range finder to measure a second distance between the second laser range finder and the coating area;
The controller is further used for adding the first distance, the second distance and the substrate thickness of the pole piece to obtain a third distance, and determining a difference value between the total distance and the third distance to obtain the coating thickness of the pole piece; wherein the total distance is the distance between the first laser range finder and the second laser range finder.
10. The coating thickness detection apparatus of claim 9, further comprising a camera integrated with the laser cleaning galvanometer system; the controller is also used for controlling the first guide rail and the third guide rail to move the camera to the position above the pole piece;
The controller is also used for controlling the camera to determine a plurality of positions to be cleaned of the region to be cleaned of the pole piece and receiving the positions to be cleaned of the region to be cleaned transmitted by the camera; the controller is also used for controlling the first guide rail and the third guide rail to move the laser cleaning galvanometer system to the upper part of the to-be-cleaned area according to a plurality of to-be-cleaned positions of the to-be-cleaned area.
11. The coating thickness detection apparatus of claim 9, further comprising a camera integrated with the laser cleaning galvanometer system; the controller is also used for controlling the first guide rail and the third guide rail to move the camera to the position above the pole piece;
The controller is further configured to control the camera to determine a plurality of first ranging positions of the cleaning area, and receive the plurality of first ranging positions transmitted by the camera; the controller is further used for controlling the first guide rail to move the first laser range finder to the position above the cleaning area according to the plurality of first range finding positions;
The controller is further configured to control the camera to determine a plurality of second ranging positions of the coating area, and receive the plurality of second ranging positions transmitted by the camera; the controller is also used for controlling the second guide rail to move the pole piece to the position above the second laser range finder according to the plurality of second range finding positions.
12. The coating thickness detection apparatus according to claim 10 or 11, further comprising a dust extraction device integrated with the laser cleaning galvanometer system;
The controller is also used for controlling the dust collection device to absorb the cleaned coating.
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